CN108873524B - Display panel, method for improving performance of display panel and display device - Google Patents
Display panel, method for improving performance of display panel and display device Download PDFInfo
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- CN108873524B CN108873524B CN201810785138.5A CN201810785138A CN108873524B CN 108873524 B CN108873524 B CN 108873524B CN 201810785138 A CN201810785138 A CN 201810785138A CN 108873524 B CN108873524 B CN 108873524B
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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
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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
- G02F1/136254—Checking; Testing
Abstract
The application discloses a display panel, a method for improving the performance of the display panel and a display device, wherein the display panel comprises an array substrate, a color film substrate and a liquid crystal layer; the array substrate comprises a first substrate, a thin film transistor, a data line, a scanning line, at least two monitoring lines and acquisition points arranged on the monitoring lines, wherein the monitoring lines and the data line or the scanning line are arranged on the same layer; the color film substrate comprises a second substrate and a common electrode layer, and the acquisition point is connected with the common electrode layer and used for acquiring a voltage signal of the common electrode layer; the driving unit is connected with the common electrode layer and the monitoring line, and the driving unit compensates the common signal of the common electrode layer according to the voltage signal. By means of the mode, the voltage of the common electrode layer of the color film substrate can be stabilized, and the display effect is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a method for improving performance of the display panel and a display device.
Background
With the development of LCD technology, the demand of large-sized panels is increasing day by day, and because of the large size, the load is also large, so that the display panel has signal delay and the capacitive coupling effect is serious, especially the coupling between the data signal and the common potential of the color film substrate by the pixel electrode, and because the common potential layer of the color film substrate uses a thin ITO (Indium-Tin Oxide), the resistance is large, and the recovery after coupling is slow, so that the display panel has horizontal crosstalk.
At present, a common electrode layer of a color film substrate is usually made of ITO, and for a display panel with a larger size, the common electrode layer with the larger size needs to be arranged, so that voltage unevenness at each position of the common electrode layer is easily caused, and a picture displayed by a display device is not bright in different degrees, such as flicker, crosstalk, and picture unevenness, thereby seriously affecting the display effect and the product yield of the display device.
Disclosure of Invention
The application mainly solves the problem of providing a display panel, a method for improving the performance of the display panel and a display device, which can stabilize the voltage of a common electrode layer of a color film substrate and improve the display effect.
In order to solve the technical problem, the present application adopts a technical scheme that a display panel is provided, and the display panel includes an array substrate, a color film substrate, and a liquid crystal layer disposed between the array substrate and the color film substrate; the array substrate comprises a first substrate, a thin film transistor, a data line, a scanning line vertically intersected with the data line, at least two monitoring lines and collecting points arranged on the monitoring lines, wherein the thin film transistor, the data line, the scanning line and the monitoring lines are arranged on the first substrate; the color film substrate comprises a second substrate and a common electrode layer arranged on the second substrate, and the acquisition point is connected with the common electrode layer and used for acquiring a voltage signal of the common electrode layer; and the driving unit is connected with the common electrode layer and the monitoring line and compensates the common signal of the common electrode layer according to the voltage signal.
In order to solve the above technical problem, another technical solution adopted by the present application is to provide a method for improving performance of a display panel, where the method includes: arranging at least two monitoring lines on a first substrate of the array substrate, and arranging a collection point on each monitoring line; collecting voltage signals of the common electrode layer by using monitoring points; and processing the voltage signal through the driving unit to obtain a compensation signal, and compensating the common signal of the common electrode layer according to the compensation signal.
In order to solve the above technical problem, another technical solution adopted by the present application is to provide a display device, which includes the above display panel.
Through the scheme, the beneficial effects of the application are that: the display panel comprises a color film substrate, an array substrate and a liquid crystal layer arranged between the array substrate and the color film substrate, wherein the array substrate comprises a first substrate, a thin film transistor, a data line, a scanning line vertically intersected with the data line, at least two monitoring lines and acquisition points arranged on the monitoring lines, voltage signals of a common electrode layer are acquired through the acquisition points, and the common signals of the common electrode layer of the color film substrate are compensated according to the voltage signals, so that the common signals are stabilized at preset voltage values, the voltage of the common electrode layer of the color film substrate is stabilized, the phenomena of flicker, crosstalk, uneven pictures and the like of a display picture are avoided, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic diagram of traces of an array substrate in the prior art;
FIG. 2 is a schematic structural diagram of an embodiment of a display panel provided in the present application;
fig. 3 is a schematic top view of an array substrate according to an embodiment of the present disclosure;
fig. 4 is a schematic trace diagram of an embodiment of an array substrate provided in the present application;
fig. 5 is a schematic diagram of traces of an array substrate in another embodiment of a display panel provided in the present application;
FIG. 6 is a schematic voltage waveform diagram of another embodiment of a display panel provided in the present application;
FIG. 7 is a flowchart illustrating an embodiment of a method for improving performance of a display panel;
fig. 8 is a schematic structural diagram of an embodiment of a display device provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the prior art, a compensation function of a common potential of a color film substrate is usually adopted, that is, the coupling condition of the common potential in a display panel is detected, and then reverse compensation is given from an input end to ensure the stability of the common potential and ensure the stability of the common potential of the display panel, so that the problems of horizontal crosstalk and the like are solved.
Referring to fig. 1, fig. 1 is a schematic diagram of routing of an array substrate in the prior art, a collection point (not shown in the figure) is located on a common electrode line of a thin film transistor substrate, a monitoring line 11 for monitoring a common electrode voltage of the thin film transistor substrate is arranged at the collection point, the monitoring line 11 is connected to a flip chip 12 attached to the thin film transistor substrate, a conductive gold ball 13 is used for conducting a pixel electrode of the array substrate and a common electrode of a color film substrate, the monitoring line 11 inputs the obtained voltage into a feedback circuit and a signal amplifier to obtain a compensation signal, and then the compensation signal is input into a display panel to compensate the voltage of the common electrode of the color film substrate.
However, in the conventional common potential compensation design of the color film substrate, the resistance of the material ITO used for the common electrode of the color film substrate is relatively large, the potential of the common electrode of the color film substrate will have serious delay and distortion, and the detected signal is a signal after the delay and distortion, so that accurate compensation is not easy to realize, and the effect of improving horizontal crosstalk is not obvious.
Referring to fig. 2 to 4, fig. 2 is a schematic structural diagram of an embodiment of a display panel provided in the present application, where the display panel includes an array substrate 21, a color filter substrate 22, and a liquid crystal layer 23 disposed between the array substrate 21 and the color filter substrate 22.
The array substrate 21 includes a first substrate 211, a thin film transistor 212, a data line 213, a scan line 214 perpendicularly intersecting the data line 213, at least two monitor lines 215, and collection points 216 disposed on the monitor lines 215.
The thin film transistor 212, the data line 213, the scan line 214, and the monitor line 215 are disposed on the first substrate 211, the data line 213 is connected to a source of the thin film transistor 212, the scan line 214 is connected to a gate of the thin film transistor 212, and the monitor line 215 may be disposed in the same layer as the data line 213 or the scan line 214.
The color filter substrate 22 includes a second substrate 221 and a common electrode layer 222 disposed on the second substrate 221; the collecting point 216 is connected with the common electrode layer 222, and the collecting point 216 is used for collecting a voltage signal of the common electrode layer 222.
Due to the coupling effect of the data lines 213 and the pixel electrodes on the common signal of the common electrode layer 222 of the color film substrate, the common electrode layer 222 has a horizontal crosstalk area 217; the common signal may be a voltage signal.
In order to eliminate the horizontal crosstalk, the present embodiment provides a driving unit, which is connected to the common electrode layer 222 and the monitoring line 215, and the driving unit compensates the common signal of the common electrode layer 222 according to the voltage signal acquired by the acquisition point 216.
The monitor line 215 is connected to a COF (Chip on Film) 218, and the common electrode line of the array substrate 21 is conducted to the common electrode layer 222 of the color filter substrate 22 through a conductive gold ball 219. The collecting point 216 on the array substrate 21 is connected to the common electrode layer 222 of the color filter substrate 22, so as to obtain a voltage signal of the common electrode layer 222 of the color filter substrate 22.
Compensating the common signal of the common electrode layer 222 by using the voltage signal acquired by the acquisition point 216, so that the common signal is stabilized at a preset voltage value; specifically, the compensation signal is input into the display panel to compensate the common signal of the common electrode layer 222 of the corresponding color filter substrate.
For example, when the voltage input to the common electrode of the color filter substrate 22 in the liquid crystal display panel is V0, the voltage value obtained at the collecting point 216 is increased due to the coupling effect of other signal lines in the display panel, and the voltage value obtained at each collecting point 216 is correspondingly decreased by using the signal amplifier for reverse compensation, so that the voltage of the common electrode layer 222 of the color filter substrate tends to a stable voltage value.
After the color filter substrate 22 and the array substrate 21 are connected in a box-to-box manner, the common electrode layer 222 on the color filter substrate 22 is conducted with the common electrode lines on the array substrate 21 through the conductive gold balls 219 doped in the sealing compound, so that an electric field is formed between the common electrode layer 222 on the color filter substrate 22 and the common electrode lines on the array substrate 21 to drive the liquid crystal 23 located therebetween to rotate, and the combination of three colors of red, green and blue with different light intensities is controlled by controlling the light transmission amount to display a colorful image.
Different from the prior art, this embodiment provides a display panel, where the display panel includes a color film substrate, an array substrate, and a liquid crystal layer disposed between the array substrate and the color film substrate, where the array substrate includes a first substrate, a thin film transistor, a data line, a scan line intersecting the data line perpendicularly, at least two monitoring lines, and a collection point disposed on the monitoring lines, and obtains a voltage signal of a common electrode layer through the collection point, and compensates the common signal of the common electrode layer of the color film substrate according to the voltage signal, so as to stabilize the common signal at a preset voltage value, so that the voltage of the common electrode layer of the color film substrate is stable, thereby avoiding undesirable phenomena such as flicker, crosstalk, and uneven picture in a display picture, and improving a display effect.
Referring to fig. 5, fig. 5 is a schematic diagram of routing of an array substrate in another embodiment of the display panel provided in the present application, and the structure of the display panel is as described in the above embodiments and is not repeated herein; in particular, the acquisition spots on the array substrate comprise first acquisition spots 51 and second acquisition spots 52.
The first collecting point 51 is arranged on the first monitoring line 53, and the first collecting point 51 is used for collecting a first voltage signal; a second pick-up point 52 is arranged on the second monitoring line 54, the second pick-up point 52 being adapted to pick up a second voltage signal.
The first collecting points 51 and the second collecting points 52 are both arranged outside the display area of the display panel, the first collecting points 51 are correspondingly arranged at the upper edge of the horizontal crosstalk area of the common electrode layer, and the second collecting points 52 are correspondingly arranged at the lower edge of the horizontal crosstalk area of the common electrode layer, namely the position where the voltage jumps or the position where the gray scale jumps.
The driving unit includes a signal amplifier, one end of the signal amplifier is connected to the first monitoring line 53 or the second detecting line 54, and the other end of the signal amplifier is used for outputting a compensation signal and inputting the compensation signal into the display panel.
Further, the signal amplifier amplifies and inverts the voltage signal to obtain a compensation signal, and compensates the common signal with the compensation signal.
The driving unit comprises a selection function, and in the display time of each frame, the driving unit selectively connects the first monitoring line 53 in the first half frame of each frame and compensates the common signal according to the first voltage signal; the driving unit selectively connects the second monitor line 54 in the second half of each frame and compensates the common signal according to the second voltage signal.
In order to compensate the common signal, the collected voltage signals (the first voltage signal and the second voltage signal) need to be input into a signal amplifier, the voltage signals are amplified or reduced by the signal amplifier, which can be determined according to the actual situation, and the processed voltage signals are inverted to obtain compensation signals; if the coupling effect of other signals is larger, the intensity of the compensation signal is increased, so that the voltage of the common electrode layer is stabilized at a preset voltage value.
The flip chip 56 is electrically coupled to the PCB 57, and the potential of the common electrode layer is inputted into the display panel through the metal wire 58, and the conductive gold balls 59 make the common electrode of the color filter substrate and the pixel electrode of the array substrate conducted.
The voltage waveform of this example is shown in FIG. 6, VINIs an input voltage of the common electrode layer, VAIs the monitored voltage, V, of the first pick-up point 51BFor the monitored voltage of the second collecting point 52, the first collecting point 51 can accurately detect the potential change at M positions, but the detected potential at N positions is a signal delayed by the ITO of the color film substrate, and the second collecting point 52 can accurately detect the potential change at N positions, but the monitored signal at M position is a signal delayed by the ITO of the color film substrate.
By adding a selection function in the drive unit, a first voltage signal is adopted as a monitoring signal in the first half frame time of each frame, a second voltage signal is adopted as a monitoring signal in the previous and next frame time, and a signal amplifier is utilized to process the voltage signals of two different time periods to obtain a compensation voltage signal VpCompensating the voltage signal VpThe coupling potential of the common electrode layer can be accurately compensated, so that the coupling potential of the common electrode layer is reduced, horizontal crosstalk is improved, and the quality of a panel is improved.
In this embodiment, because the first collecting point 51 and the second collecting point 52 are provided, the first collecting point 51 can accurately detect a signal at the edge M of the horizontal crosstalk area, and the second collecting point 52 can accurately detect a signal at the edge N of the horizontal crosstalk area, so that the coupling potential of the common electrode layer can be compensated, and delay and distortion caused by transmission through ITO can be avoided.
Different from the prior art, the embodiment provides a display panel, in which a first collecting point and a second collecting point are arranged on an array substrate, and a first voltage signal is collected by using a first connecting line at the first collecting point and a second voltage signal is collected by using a second connecting line at the second collecting point; the delay of the voltage signals in the transmission process is reduced by arranging the first collecting point and the second collecting point, so that the public signals are compensated according to the first voltage signals in the first half frame, and the public signals are compensated according to the second voltage signals in the second half frame, so that the voltage of the public electrode layer of the color film substrate is stable, the coupling potential of the public electrode layer is reduced, the horizontal crosstalk is improved, and the quality of the panel is improved.
Referring to fig. 7, fig. 7 is a schematic flowchart illustrating an embodiment of a method for improving performance of a display panel, the method using the display panel in the above embodiment, the method including:
step 71: at least two monitoring lines are arranged on a first substrate of the array substrate, and each monitoring line is provided with a collection point.
The array substrate comprises a first substrate, a thin film transistor, a data line, a scanning line vertically intersected with the data line, at least two monitoring lines and collecting points arranged on the monitoring lines, wherein the collecting points can be arranged at the edge position of a horizontal crosstalk area of a common electrode layer.
Step 72: and collecting voltage signals of the common electrode layer by using the monitoring points.
The monitoring point is connected with the common electrode layer through a conductive gold ball, so that a voltage signal of the common electrode layer is acquired in real time.
Step 73: the voltage signal is processed through the driving unit to obtain a compensation signal, and the common signal of the common electrode layer is compensated according to the compensation signal.
And inputting the acquired voltage signal to one end of a signal amplifier of the driving unit, reversing to obtain a compensation signal, and compensating the common signal of the common electrode layer by using the compensation signal so as to stabilize the common signal of the common electrode layer at a preset voltage value.
The method includes the steps that at least two monitoring lines are arranged on a first substrate of an array substrate, and each monitoring line is provided with a collection point; secondly, collecting voltage signals of the common electrode layer by using monitoring points; and finally, processing the voltage signal through a driving unit to obtain a compensation signal, and compensating the common signal of the common electrode layer according to the compensation signal. Delay of voltage signals in the transmission process is reduced by arranging a plurality of acquisition points, and public signals of the color film substrate are compensated, so that the voltage of a public electrode layer of the color film substrate is stable, horizontal crosstalk is improved, and the quality of a panel is improved.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a display device provided in the present application, where the display device includes the display panel in the embodiment.
The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.
Claims (8)
1. The display panel is characterized by comprising an array substrate, a color film substrate and a liquid crystal layer arranged between the array substrate and the color film substrate;
the array substrate comprises a first substrate, a thin film transistor, a data line, a scanning line vertically intersected with the data line, at least two monitoring lines and collecting points arranged on the monitoring lines, wherein the thin film transistor, the data line, the scanning line and the monitoring lines are arranged on the first substrate, the data line is connected with a source electrode of the thin film transistor, the scanning line is connected with a grid electrode of the thin film transistor, and the monitoring lines are arranged on the same layer as the data line or the scanning lines;
the color film substrate comprises a second substrate and a common electrode layer arranged on the second substrate, and the collecting point is connected with the common electrode layer and used for collecting a voltage signal of the common electrode layer;
the driving unit is connected with the common electrode layer and the monitoring line and compensates the common signal of the common electrode layer according to the voltage signal;
the acquisition points comprise a first acquisition point and a second acquisition point, the first acquisition point is arranged on a first monitoring line, the second acquisition point is arranged on a second monitoring line, the first acquisition point is used for acquiring a first voltage signal, and the second acquisition point is used for acquiring a second voltage signal;
the driving unit compensates the common signal according to the first voltage signal in a first half frame of each frame; the driving unit compensates the common signal according to the second voltage signal in a second half frame of each frame.
2. The display panel according to claim 1,
the first collecting point and the second collecting point are both arranged outside a display area of the display panel, the first collecting point is correspondingly arranged at the upper edge of a crosstalk area of the common electrode layer, and the second collecting point is correspondingly arranged at the lower edge of the crosstalk area of the common electrode layer.
3. The display panel according to claim 1,
the driving unit comprises a signal amplifier, one end of the signal amplifier is connected with the monitoring line, and the other end of the signal amplifier is used for outputting a compensation signal and inputting the compensation signal into the display panel.
4. The display panel according to claim 3,
the signal amplifier amplifies the voltage signal, reverses the voltage signal to obtain the compensation signal, and compensates the common signal by using the compensation signal.
5. The display panel according to claim 1,
the collecting point is connected with the common electrode layer through a conductive gold ball to obtain a voltage signal of the common electrode layer.
6. A method of improving the performance of a display panel using the display panel of claim 1, comprising:
arranging at least two monitoring lines on a first substrate of the array substrate, and arranging a collection point on each monitoring line;
collecting voltage signals of the common electrode layer by using the monitoring points, wherein first voltage signals are collected by using first collecting points arranged on a first monitoring line, and second voltage signals are collected by using second collecting points arranged on a second monitoring line;
processing the voltage signal through a driving unit to obtain a compensation signal, and compensating a common signal of the common electrode layer according to the compensation signal, wherein the common signal is compensated according to the first voltage signal in the first half frame of each frame through the driving unit; compensating, by the driving unit, the common signal according to the second voltage signal in a latter half frame of each frame.
7. The method of improving performance of a display panel according to claim 6,
the step of processing the voltage signal by the driving unit to obtain a compensation signal and compensating the common signal of the common electrode layer according to the compensation signal includes:
inputting the voltage signal to a signal amplifier of the driving unit to obtain the compensation signal.
8. A display device comprising the display panel according to claims 1 to 5.
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CN111308820B (en) * | 2020-03-11 | 2022-07-05 | 京东方科技集团股份有限公司 | Array substrate, display device and control method thereof |
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CN115291426B (en) * | 2022-07-28 | 2023-08-22 | Tcl华星光电技术有限公司 | Display panel and driving method thereof |
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CN107238987A (en) * | 2017-07-14 | 2017-10-10 | 深圳市华星光电技术有限公司 | It is a kind of to be used to improve the circuit structure and method of panel performance |
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