CN206441519U - Compensation device and display device for display panel - Google Patents
Compensation device and display device for display panel Download PDFInfo
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- CN206441519U CN206441519U CN201621046978.2U CN201621046978U CN206441519U CN 206441519 U CN206441519 U CN 206441519U CN 201621046978 U CN201621046978 U CN 201621046978U CN 206441519 U CN206441519 U CN 206441519U
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- public electrode
- display panel
- electric capacity
- vcom
- insulating barrier
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Abstract
Embodiment of the present utility model discloses the compensation device and display device for display panel.For the compensation device of display panel, including：Compensating module, it is configured as, according to for the public electrode input signal to display panel offer public electrode voltages and the public electrode feedback signal from the display panel, public electrode thermal compensation signal being generated, to be supplied to the display panel；Comparison module, it is configured as public electrode thermal compensation signal described in comparison and the public electrode feedback signal；And adjustment module, it is configured as the comparative result according to the comparison module, adjusts the public electrode thermal compensation signal.
Description
Technical field
The utility model is related to display technology field, in particular it relates to display panel, compensation device and display device.
Background technology
Liquid crystal display (Liquid Crystal Display, abbreviation LCD) has Low emissivity, small volume and low power consuming etc.
Advantage, is widely used in the electronic products such as notebook computer, flat-surface television or mobile phone.In tft liquid crystal
In display (TFT-LCD), one gate switch circuit is set for each pixel, each is controlled so as to relatively independent
Pixel.Wherein, public electrode voltages provide common electric voltage for the pixel capacitance (Clc) and storage capacitance (Cs) of each pixel, from
And provide reference voltage for the substrate of liquid crystal display.
Public electrode pulls (VCOM Shift), the i.e. change of VCOM voltages, and influence is applied to the actual electricity in pixel
Pressure, so as to produce ghost.With the raising of monitor resolution, and the requirement to display display quality raising,
It is generally necessary to the stability by lifting VCOM voltages to VCOM voltage compensations.
But in existing VCOM voltage compensation technologies, do not consider the resistance to pulling characteristics of VCOM, and be difficult to controllably
Adjust VCOM compensation.Although can be compensated by time schedule controller (TCON) etc. using the VCOM control sources of active,
Power integrated circuit (Power IC) is complicated, with high costs.In addition, in less one section of VCOM voltage differences change, compensation
Effect is typically poor.
Utility model content
Embodiment of the present utility model provide a kind of display panel and preparation method thereof, compensation device, display device and
Public electrode (VCOM) voltage compensating method, it can improve VCOM stability, and improve the effect of VCOM compensation.
According to one side of the present utility model there is provided a kind of display panel, it includes being arranged on display panel
At least one electric capacity in the region beyond effective display area domain, to cause the public electrode voltages of display panel to keep stable.
In embodiment of the present utility model, electric capacity may include the first metal layer, and its public electrode with display panel is defeated
Enter end connection；Insulating barrier, it is set on the first metal layer；And second metal layer, it is set on the insulating layer, and has
There is earth terminal.
In embodiment of the present utility model, electric capacity may include the first metal layer, and its public electrode with display panel is defeated
Enter end connection；First insulating barrier, it is set on the first metal layer；Second insulating barrier, it is arranged on the first insulating barrier；
3rd metal level, it is set over the second dielectric, and with earth terminal.
In embodiment of the present utility model, electric capacity may include the first metal layer；First insulating barrier, it is arranged on first
On metal level；Second metal layer, it is arranged on the first insulating barrier, and is connected with the public electrode input of display panel；
Second insulating barrier, it is arranged in second metal layer；3rd metal level, it is set over the second dielectric.Wherein, first
Metal level and/or the 3rd metal level have earth terminal.
In embodiment of the present utility model, electric capacity may include the first metal layer, and it has earth terminal；First insulating barrier,
It is set on the first metal layer；Second insulating barrier, it is arranged on the first insulating barrier；3rd metal level, it is set
Over the second dielectric, and with the public electrode input of display panel it is connected.
According to another aspect of the present utility model there is provided a kind of compensation device for any of the above display panel,
Including：Compensating module, it is configured as according to for providing the public electrode input signal of public electrode voltages and from display
The public electrode feedback signal of panel, generates public electrode thermal compensation signal, to be supplied to display panel；Comparison module, its by with
It is set to and compares public electrode thermal compensation signal and public electrode feedback signal；Adjustment module, it is configured as according to comparison module
Comparative result, adjusts public electrode thermal compensation signal.
In embodiment of the present utility model, compensating module may include the first electric capacity, first resistor, second resistance, amplification
Device and the second electric capacity.The first end of first electric capacity is provided public electrode feedback signal, and the second end is connected with first resistor.First
The first end of resistance is connected with the second end of the first electric capacity, the first input end connection of the second end and amplifier.Second resistance
The output end of the first input end connection of first end and amplifier, the second end and amplifier is connected.The first input end of amplifier
It is connected with the second end of first resistor and the first end of second resistance, the second input is provided public electrode input signal, and
Export public electrode thermal compensation signal.The first end of second electric capacity is connected with the second end of the first electric capacity, and the second end is connected to ground.
In embodiment of the present utility model, adjustment module is configured as public electrode thermal compensation signal compared to public electrode
During feedback signal lags, the capacitance of the second electric capacity is improved, when public electrode thermal compensation signal is super compared to public electrode feedback signal
When preceding, the capacitance of the second electric capacity is reduced.
In embodiment of the present utility model, the cancellation ratio of compensation device changes according to the different zones of display panel.
In embodiment of the present utility model, the cancellation ratio of compensation device public electrode voltages voltage difference relative to when
Between the low region of rate of change be higher than in the voltage difference of the public electrode voltages region high relative to the rate of change of time.
According to another aspect of the present utility model there is provided a kind of display device, including：A kind of display panel above；
A kind of compensation device above；A plurality of public electrode input line, for inputting public electrode input signal to display panel；It is a plurality of
Public electrode feedback line, for the public electrode feedback signal from display panel to be input into compensation device；A plurality of common electrical
Pole compensating line, the public electrode thermal compensation signal for self-compensating device in future is input to display panel.
In embodiment of the present utility model, the effective display area domain of display panel is divided into many sub-regions, wherein,
Each with many sub-regions is arranged in correspondence with compensation device, and the cancellation ratio of each compensation device is based on corresponding subregion aobvious
Show the position on panel to set.
In embodiment of the present utility model, with the compensation set at the equidistant subregion of central shaft of display panel
The cancellation ratio of device is equal.
According to another aspect of the present utility model, there is provided the common electrode voltage compensation side of the display device for the above
Method.In the method, obtain to display device display panel input public electrode input signal and from display panel
Public electrode feedback signal, wherein, public electrode input signal provides public electrode voltages.It is anti-based on acquired public electrode
Feedback signal and public electrode input signal, generate public electrode thermal compensation signal.Then, public electrode thermal compensation signal is compared and public
Electrode-feedback signal, and based on the result of the comparison, adjust public electrode thermal compensation signal.
In embodiment of the present utility model, the effective display area domain of display panel can be divided into many sub-regions, and
And generate corresponding public electrode thermal compensation signal corresponding to every sub-regions of many sub-regions.
According to another aspect of the present utility model there is provided a kind of manufacture method of display panel, wherein, in display panel
Effective display area domain beyond region form at least one electric capacity.
In embodiment of the present utility model, forming at least one electric capacity includes：Form the first metal layer, itself and common electrical
Pole input connection；Insulating barrier is formed on the first metal layer；Second metal layer is formed on the insulating layer, forms ground connection thereon
End.
In embodiment of the present utility model, forming at least one electric capacity includes：Form the first metal layer, itself and common electrical
Pole input connection；The first insulating barrier is formed on the first metal layer；The second insulating barrier is formed on the first insulating barrier；Second
Second metal layer is formed on insulating barrier, earth terminal is formed thereon.
In embodiment of the present utility model, forming at least one electric capacity includes：Form the first metal layer；In the first metal
The first insulating barrier is formed on layer；Second metal layer is formed on the first insulating barrier, and is connected with public electrode input；Second
The second insulating barrier is formed on metal level；The 3rd metal level is formed over the second dielectric；Wherein, the first metal layer and/or the 3rd
Earth terminal is formed on metal level.
In embodiment of the present utility model, forming at least one electric capacity includes：The first metal layer is formed, and in shape thereon
Into earth terminal；The first insulating barrier is formed on the first metal layer；The second insulating barrier is formed on the first insulating barrier；In the second insulation
The 3rd metal level is formed on layer, and is connected with public electrode input.
Electric capacity is set on the outside of display panel effective display area domain according to the display panel of embodiment of the present utility model, with
Lift the stability of public electrode voltages；Compensation device controllably adjusts common electrical using the compensating module of two groups of work simultaneously
Pole tension is compensated, so as to lift the effect of common electrode voltage compensation；And be divided into display panel effective display area domain some
Subregion, and the compensation device with corresponding cancellation ratio is set respectively for each sub-regions, therefore both increased public electrode
The stability of voltage lifts compensation effect again.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model, the accompanying drawing of embodiment will be carried out briefly below
It is bright.It should be known that figures described below is only some embodiments of the present utility model, rather than to limit of the present utility model
System, wherein：
Fig. 1 a are the schematic diagrames of the display panel according to embodiment of the present utility model；
Fig. 1 b are the schematic block diagrams of display panel as shown in Figure 1a；
Fig. 2 a are the schematic sectional views of the first example of the electric capacity of display panel as shown in Figure 1a；
Fig. 2 b are the schematic sectional views of the second example of the electric capacity of display panel as shown in Figure 1a；
Fig. 2 c are the schematic sectional views of the 3rd example of the electric capacity of display panel as shown in Figure 1a；
Fig. 2 d are the schematic sectional views of the 4th example of the electric capacity of display panel as shown in Figure 1a；
Fig. 3 is the schematic block diagram of the compensation device according to embodiment of the present utility model；
Fig. 4 a are the exemplary circuit diagrams of the compensating module in compensation device as shown in Figure 3；
Fig. 4 b are the compensation circuit figures for illustrating compensating module ideally；
Fig. 5 be for illustrate the VCOM thermal compensation signals of the compensating module shown in Fig. 4 a and Fig. 4 b and VCOM feedback signals it
Between relation schematic diagram；
Fig. 6 is the schematic diagram of the display device according to one embodiment of the present utility model；
Fig. 7 is the schematic diagram of the display device according to another embodiment of the present utility model；
Fig. 8 is the flow chart of the common electrode voltage compensation method according to embodiment of the present utility model；
Fig. 9 a are the flow charts for manufacturing the process of the electric capacity shown in Fig. 2 a；
Fig. 9 b are the flow charts for manufacturing the process of the electric capacity shown in Fig. 2 b；
Fig. 9 c are the flow charts for manufacturing the process of the electric capacity shown in Fig. 2 c；
Fig. 9 d are the flow charts for manufacturing the process of the electric capacity shown in Fig. 2 d.
Embodiment
In order that the purpose, technical scheme and advantage of embodiment of the present utility model are clearer, below in conjunction with accompanying drawing,
Technical scheme to embodiment of the present utility model carries out clear, complete description.Obviously, described embodiment is only this
A part of embodiment of utility model, and and not all embodiment.Based on described embodiment, the ordinary skill of this area
All other embodiment that personnel are obtained on the premise of without creative work, also belongs to scope of the present utility model.
Fig. 1 a show the schematic diagram of the display panel 100 according to embodiment of the present utility model.In display panel 100
Center is provided with effective display area domain AA (Active Area), and the area beyond the effective display area domain AA of display panel
Fanout area (Fan Out) edge in domain, i.e. display panel, correspondingly sets multiple VCOM electric capacity.
Referring also to Fig. 1 b, its schematic block diagram equivalent to the display panel shown in Fig. 1 a.Wherein, electric capacity Cpanel phases
When the VCOM electric capacity in Fig. 1 a, its one end is connected to VCOM inputs, other end ground connection.In addition, electric capacity Cpcb is schematic
Ground shows the electric capacity on the printed circuit board (PCB) (PCB) outside display panel, and equally, its one end is connected to VCOM inputs, and another
One end is grounded.Electric capacity Cpanel and Cpcb are used to be filtered the VCOM input signals provided to display panel, Jin Erke
To lift the stability of VCOM voltages.
If only with electric capacity Cpcb to VCOM input signals filter, due to electric capacity Cpcb apart from display panel relatively
Far, circuit therebetween will produce loss, so as to influence the effect of filtering.On the other hand, the electric capacity arranged on a display panel
Cpanel (that is, VCOM electric capacity) apart from display panel effective display area domain AA relative closes, therefore to VCOM input signals
During filtering, produced line loss is reduced, more preferable filter effect can be reached.By this method, it can improve aobvious
Show the load capacity and resistance to pulling characteristic of the public electrode of panel itself, so as to significantly improve the stability of VCOM voltages.
Further, it is possible under conditions of existing TFT manufacturing process is not changed, construct above-described VCOM electric capacity.Tool
Body, when manufacturing array base palte, in the spare area for being fanned out to area edge of display panel, using existing inside display panel
Metal level and insulating barrier construct above-described VCOM electric capacity.Due to being coated with sealant, institute around effective display area domain
With VCOM electric capacity can use all cover or it is netted wait various structures, wherein the structure such as netted can be lifted sealant solidify energy
Power.
Fig. 2 a-2d show the schematic sectional view of four kinds of examples of the VCOM electric capacity shown in Fig. 1 a, and it is respectively adopted 2 layers
The configuration of metal/3 layer metal, is described in detail below.
As shown in Figure 2 a, VCOM electric capacity includes the first metal layer (Metal 1), sets on the first metal layer first exhausted
Edge layer (Insulator 1) and the second metal layer (Metal 2) being arranged on the first insulating barrier.Of the present utility model
In embodiment, the first metal layer is connected with VCOM inputs, and has earth terminal GND in second metal layer.
As shown in Figure 2 b, VCOM electric capacity includes the first metal layer (Metal 1), sets on the first metal layer first exhausted
Edge layer (Insulator 1), the second insulating barrier (Insulator 2) being arranged on the first insulating barrier and it is arranged on second
The 3rd metal level (Metal 3) on insulating barrier.In embodiment of the present utility model, the first metal layer connects with VCOM inputs
Connect, and there is earth terminal GND in second metal layer.
As shown in Figure 2 c, VCOM electric capacity includes the first metal layer (Metal 1), sets on the first metal layer first exhausted
Edge layer (Insulator 1), the second metal layer (Metal 2) being arranged on the first insulating barrier, it is arranged in second metal layer
The second insulating barrier (Insulator 2) and the 3rd metal level (Metal 3) over the second dielectric is set.In this reality
With in new embodiment, second metal layer is connected with VCOM inputs, and is had on the first metal layer and/or the 3rd metal level
There is earth terminal GND.
As shown in Figure 2 d, VCOM electric capacity includes the first metal layer (Metal 1), sets on the first metal layer first exhausted
Edge layer (Insulator 1), the second insulating barrier (Insulator 2) being arranged on the first insulating barrier and it is arranged on second
The 3rd metal level (Metal 3) on insulating barrier.In embodiment of the present utility model, the 3rd metal level connects with VCOM inputs
Connect, and there is earth terminal GND on the first metal layer.
Further, for the gate switch element of such as field-effect transistor (MOSFET) on display panel, its grid
It can be constructed on the first metal layer, source/drain can be built into second metal layer.Wherein, the first metal layer, the second metal
Layer and the 3rd metal level are made up of the metal material of molybdenum, aluminium, alumel, nickel tungsten, copper etc., the first insulating barrier and the
Two insulating barriers are made up of the insulating materials of the mixture of silicon nitride, silicon nitride and silicon oxynitride etc..
As described above, VCOM electric capacity is constructed using existing production technology, it is simple in construction, it is easy to manufacture.Fig. 3 shows basis
The schematic block diagram of the compensation device 300 of embodiment of the present utility model.As shown in figure 3, compensation device 300 may include compensation
Module 310, comparison module 320 and adjustment module 330.Wherein, compensating module 310 can be in VCOM input signals and VCOM feedback letters
Number control under, generate VCOM thermal compensation signals, to be supplied to display panel.Comparison module 320 is configured as comparing VCOM compensation
Signal and the phase difference of VCOM feedback signals.Adjustment module 330 is configured as, according to above result of the comparison, adjusting compensating module
310, and then VCOM thermal compensation signals are adjusted, so as to reduce phase difference between the two.
Fig. 4 a show the exemplary circuit diagram of the compensating module 310 in the compensation device 300 shown in Fig. 3.Compensating module
310 may include the first electric capacity C1, first resistor R1, second resistance R2, amplifier OA and the second electric capacity C2.The of first electric capacity C1
One end is provided VCOM feedback signals, and the second end is connected with first resistor R1 first end, for isolated DC noise.First electricity
Resistance R1 first end is connected with the first electric capacity C1 the second end, and the second end is connected with amplifier OA first input end.Second electricity
Resistance R2 first end is connected with amplifier OA first input end, and the second end is connected with amplifier OA output end.Amplifier OA
First input end be connected with first resistor R1 the second end, the second input is provided VCOM input signals, output end output
First VCOM thermal compensation signals.Second electric capacity C2 first end is connected with the first electric capacity C1 the second end, the second end connection ground connection.Its
In, amplifier OA first input end can be reverse input end, and the second input can be positive input.
Fig. 4 b show the compensation circuit figure for illustrating standard compensation module 410 ideally.Wherein, standard is mended
Standard VCOM thermal compensation signals can be generated under the control of VCOM input signals and VCOM feedback signals by repaying module 410.It is tied substantially
Structure is identical with the compensating module 310 in Fig. 4 b, and difference is that standard compensation module 410 does not have the second electric capacity C2, and remaining is no longer
Repeat.The ideal parameters of above-mentioned each element can be obtained respectively by calculating, therefore can utilize calculated parameter come accordingly
Each element of compensating module 310 in Fig. 4 a is set.Wherein, the first electric capacity C1 of two compensating modules capacitance can be different,
Can also be identical.
Generally, the VCOM thermal compensation signals of the pulling for offsetting VCOM feedback signals are produced using compensation device, to carry
The stability of high VCOM voltages.Ideally, VCOM thermal compensation signals have size identical and direction phase with VCOM feedback signals
Anti- amplitude and identical phase, i.e., between the two without delay.However, due to manufacturing process, line loss in reality
Etc. reason, generally there is phase difference, i.e. time delay between VCOM feedback signals and VCOM thermal compensation signals, this compensates influence
Effect.
With reference to Fig. 4 a, Fig. 4 b and Fig. 5, compensation device 300 as shown in Figure 3 is described in detail.As described above,
The standard VCOM thermal compensation signals (referring to Fig. 5) that standard compensation module 410 is generated can be assumed that VCOM ideally is mended
Signal is repaid, it has identical phase, i.e. non-time delay with VCOM feedback signals.On the other hand, compensating module 310 is generated
VCOM thermal compensation signals (referring to Fig. 5) and VCOM feedback signals between generally exist postpone.That is, VCOM thermal compensation signals
There is phase difference between standard VCOM thermal compensation signals.
Observed by the comparison module 320 of such as oscillograph and compare both VCOM thermal compensation signals and VCOM feedback signals
Phase.By the adjustment module 330 or in real time capacitance of the second electric capacity C2 manually in regulation compensating module 310, to adjust
Whole VCOM thermal compensation signals, so as to reduce phase difference between the two.In other words, the VCOM thermal compensation signals with delay are adjusted
To the preferable standard VCOM thermal compensation signals of hypothesis.Specifically, when VCOM thermal compensation signals compare VCOM feedback signal lags, improve
Second electric capacity C2 capacitance, so that delay shortens；When VCOM thermal compensation signals are advanced compared to VCOM feedback signals, reduction by the
Two electric capacity C2 capacitance, so that variable length delay.Therefore, the VCOM thermal compensation signals being adjusted are similar to standard VCOM compensation
Signal, is entered into display panel, can more effectively Contrary compensation VCOM voltages, and accelerate speed and the raising of compensation
The effect of compensation.
In addition, the multiplying power of amplifier OA in compensating module 310 also can as compensation device 310 cancellation ratio.In this reality
With in new embodiment, the cancellation ratio of compensation device 310 can change according to the different zones of display panel.Specifically, mend
The cancellation ratio for repaying device is low relative to the rate of change (that is, the regeneration rate that VCOM is pulled) of time in the voltage difference of VCOM voltages
Region is higher than in the voltage difference of the VCOM voltages region high relative to the rate of change of time.
In addition, the multiplying power to amplifier OA is adjusted, the amplitude of thermal compensation signal is may also correct for, so as to improve compensation
Effect.Specifically, amplifier OA multiplying power is improved, then increases the amplitude of thermal compensation signal；And step-down amplifier OA multiplying power, then will
Reduce the amplitude of thermal compensation signal.
Fig. 6 shows the schematic diagram of the display device 600 according to one embodiment of the present utility model.As shown in fig. 6, aobvious
Showing device 600 includes display panel 110 and (is similar to display panel 100 as described above, the only position of VCOM electric capacity and quantity has
Change), compensation device as described above 300, a plurality of VCOM input lines 610 (being shown by fine line), a plurality of VCOM feedback lines 620
(being shown by heavy line) and a plurality of VCOM compensating lines 630 (shown by dashed lines).
In embodiment of the present utility model, every VCOM input line 610 connects with the VCOM input points on display panel 110
Connect, and be configured as inputting VCOM input signals, i.e. VCOM voltages to display panel 110, so as to be each of display panel 110
Pixel provides reference voltage.In addition, VCOM input lines 610 are also connected with an input of compensation device 300, with to compensation
Device 300 provides VCOM input signals.
Multiple sampled points are set on display panel 110, such as in the effective display area domain AA centers of display panel, phase
For effective display area domain AA near-end or far-end.The VCOM feedback signals of sample point are passed by VCOM feedback lines 620
It is sent to an input of compensation device 300.
One end of every VCOM compensating line 630 is connected with the output end of compensation device 300, the other end and display panel 110
Upper VCOM compensation points (on the VCOM BAR) connection for needing to compensate.VCOM compensating lines 630 are special thicker VCOM lines, line
Path loss consumption is smaller.The VCOM thermal compensation signals that therefore, it can self-compensating device in future 300 are input to display panel 110, so that each
VCOM compensation points carry out Contrary compensation to it, that is, offset the pulling of similar VCOM feedback signals.
The resistance to pulling characteristic of VCOM voltages can have both been improved using display device 600 as described above, again can be adjustably
Control VCOM voltage compensations.It is thus possible to improve the stability of VCOM voltages, and accelerate the speed of VCOM voltage compensations.
On the other hand, it can find that, for display panel, the VCOM voltage differences of different zones are relative to the time by observation
Rate of change is different, i.e. the regeneration rate that VCOM is pulled is different.Specifically, the regeneration rate of display panel surrounding is higher, and center is extensive
Complex-velocity rate is relatively low.Therefore, the compensation effect of VCOM voltages will be influenceed.
Fig. 7 shows showing for the display device 700 of the subregion compensation method using another embodiment of the present utility model
It is intended to.It is M sub-regions by AA points of the effective display area domain of display panel in embodiment of the present utility model, and to each
Subregion carries out corresponding VCOM voltage reversals compensation.
Specifically, for every sub-regions, compensation device 300 as described above is constructed respectively.Pass through such as oscillograph
Device observes the VCOM voltages of all subregion, to obtain the regeneration rate that the VCOM of all subregion is pulled.By VCOM feedback letters
The input of corresponding compensation device 300 number is separately input to VCOM input signals, such as by adjusting peripheral circuit, to adjust
The gain of amplifier OA in whole each compensation device 300.Wherein, amplifier OA gain can be considered as the compensation of compensation device
Rate.That is, setting different cancellation ratios to the corresponding compensation device of all subregion 300, pulled to efficiently control VCOM
Regeneration rate.Specifically, amplifier OA gain is improved, that is, improves the cancellation ratio of compensation device, the extensive of VCOM pullings will be made
Complex-velocity rate is improved；Step-down amplifier OA gain, that is, reduce the cancellation ratio of compensation device, and the regeneration rate for pulling VCOM is dropped
It is low.On the other hand, by adjusting the second electric capacity C2 of the corresponding compensation device 300 of sub-regions, each VCOM thermal compensation signals are reduced
With the delay of VCOM feedback signals so that more effectively to all subregion carry out Contrary compensation.In accordance with the above, display panel
All subregion VCOM thermal compensation signals respectively to corresponding subregion carry out Contrary compensation, realize edge with center use it is different
Cancellation ratio and different compensation delay, obtain more preferable compensation effect.
In embodiment of the present utility model, the effective display area domain of display panel is using its center as axle, left and right sides axle
It is symmetrically arranged M sub-regions.Specifically, display panel effective district includes such as the 1st subregion, N subregions, M sub-districts
Many sub-regions in domain etc..Wherein, M and N is natural number, and M=2N.Therefore, the 1st subregion and M subregions can be set
Identical compensation device is put, identical compensation device is set to the 2nd subregion and M-1 subregions, to N subregions and N+
1 subregion sets identical compensation device.It is other to set similar, repeat no more.So as to set 1 to the different compensation of N kinds
Device, obtains 1 to the different VCOM thermal compensation signals of N kinds, to reach more preferable compensation effect.
Fig. 8 shows the flow chart of the VCOM voltage compensating methods according to embodiment of the present utility model.In step S810,
Above-mentioned compensating module obtains the VCOM input signals of the display panel input to display device using VCOM input lines, and utilizes
VCOM feedback lines obtain the VCOM feedback signals of the sampled point from display panel, and the wherein VCOM input signals provide common electrical
Pole tension, and the sampled point can be central sampled point, sample near-end point or distal end sampled point.In step S820, above-mentioned compensation
Module generates VCOM thermal compensation signals, passes through special thicker VCOM according to above-mentioned VCOM feedback signals and VCOM input signals
Compensating line, which provides the VCOM thermal compensation signals, needs the VCOM compensation points of compensation into display panel, so that it is anti-to offset similar VCOM
The pulling of feedback signal.In step S830, the phase of VCOM thermal compensation signals and VCOM feedback signals is compared using above-mentioned comparison module
Position.In step S840, based on the result of the comparison, VCOM thermal compensation signals are adjusted by above-mentioned adjustment module, make itself and VCOM
Feedback signal phase is identical, so as to improve the effect to display panel Contrary compensation.
In embodiment of the present utility model, VCOM voltage compensating methods further comprise：Display panel is effectively shown
Region is divided into many sub-regions, and generates corresponding VCOM thermal compensation signals corresponding to every sub-regions of many sub-regions.
Fig. 9 a-9d show the flow chart of the process for manufacturing VCOM electric capacity as shown in Figure 2 a-2d.It is aobvious
Show being fanned out to area edge VCOM electric capacity being constructed using existing metal level and insulating barrier for panel, be described in detail as follows.
As illustrated in fig. 9, in step S910, the first metal layer is formed, and it is connected with VCOM inputs.In step
S912, forms insulating barrier on the first metal layer.In step S914, second metal layer is formed on the insulating layer, and in shape thereon
Into earth terminal GND.
As shown in figure 9b, in step S920, the first metal layer is formed, and it is connected with VCOM inputs.In step
S922, forms the first insulating barrier on the first metal layer.In step S924, the second insulating barrier is formed on the first insulating barrier.
Step S926, forms second metal layer, and be formed on earth terminal GND over the second dielectric.
As is shown in fig. 9 c, in step S930, the first metal layer is formed.In step S932, is formed on the first metal layer
One insulating barrier.In step S934, second metal layer is formed on the first insulating barrier, and it is connected with VCOM inputs.In step
Rapid S936, forms the second insulating barrier in second metal layer.In step S938, the 3rd metal level is formed over the second dielectric.
Earth terminal GND is formed wherein in second metal layer and/or the 3rd metal level.
As shown in figure 9d, in step S940, the first metal layer is formed, and be formed on earth terminal GND.In step
S942, forms the first insulating barrier on the first metal layer.In step S944, the second insulating barrier is formed on the first insulating barrier.
The 3rd metal level is formed on step S946, and it is connected with VCOM inputs.
Some embodiments of the present utility model are described in detail above, but protection domain of the present utility model is simultaneously
Not limited to this.For one of ordinary skill in the art, the feelings of spirit and scope of the present utility model are not being departed from
Under condition, various modifications can be carried out to embodiment of the present utility model, replaces or deforms.Protection domain of the present utility model is by institute
Attached claim is limited.
Claims (13)
1. a kind of compensation device for display panel, including：
Compensating module, it is configured as according to the public electrode input letter for being used to provide public electrode voltages to the display panel
Number and the public electrode feedback signal from the display panel, generate public electrode thermal compensation signal, to be supplied to the display
Panel；
Comparison module, it is configured as public electrode thermal compensation signal described in comparison and the public electrode feedback signal；And
Adjustment module, it is configured as the comparative result according to the comparison module, adjusts the public electrode thermal compensation signal.
2. compensation device according to claim 1, wherein, the compensating module includes：First electric capacity, first resistor,
Two resistance, amplifier and the second electric capacity；
Wherein, the first end of first electric capacity is provided the public electrode feedback signal, the second end and the first resistor
Connection；
The first end of the first resistor is connected with the second end of first electric capacity, and the first of the second end and the amplifier is defeated
Enter end connection；
The first end of the second resistance is connected with the first input end of the amplifier, the second end and the amplifier
Output end is connected；
The first input end of the amplifier and the first end of the second end of the first resistor and the second resistance connect
Connect, the second input is provided the public electrode input signal, and exports the public electrode thermal compensation signal；
The first end of second electric capacity is connected with the second end of first electric capacity, and the second end is connected to ground.
3. compensation device according to claim 2, wherein,
When the adjustment module is configured as the public electrode thermal compensation signal compared to the public electrode feedback signal lags,
The capacitance of second electric capacity is improved, when the public electrode thermal compensation signal is advanced compared to the public electrode feedback signal
When, reduce the capacitance of second electric capacity.
4. compensation device according to claim 1, wherein, the cancellation ratio of the compensation device is according to the display panel
Different zones and change.
5. compensation device according to claim 4, wherein, the cancellation ratio of the compensation device is in the public electrode voltages
The voltage difference region low relative to the rate of change of time be higher than the voltage difference in the public electrode voltages relative to the time
The high region of rate of change.
6. the compensation device according to any one of claim 1 to 5, wherein, the display panel includes：
At least one electric capacity, it is arranged on the region beyond the effective display area domain of the display panel.
7. compensation device according to claim 6, wherein, the electric capacity includes：
The first metal layer, it is connected with the public electrode input of the display panel；
Insulating barrier, it is arranged on the first metal layer；And
Second metal layer, it is arranged on the insulating barrier, and with earth terminal.
8. compensation device according to claim 6, wherein, the electric capacity includes：
The first metal layer, it is connected with the public electrode input of the display panel；
First insulating barrier, it is arranged on the first metal layer；
Second insulating barrier, it is arranged on first insulating barrier；
3rd metal level, it is arranged on second insulating barrier, and with earth terminal.
9. compensation device according to claim 6, wherein, the electric capacity includes：
The first metal layer；
First insulating barrier, it is arranged on the first metal layer；
Second metal layer, it is arranged on first insulating barrier, and is connected with the public electrode input of the display panel
Connect；
Second insulating barrier, it is arranged in the second metal layer；
3rd metal level, it is arranged on second insulating barrier；
Wherein, the first metal layer and/or the 3rd metal level have earth terminal.
10. compensation device according to claim 6, wherein, the electric capacity includes：
The first metal layer, it has earth terminal；
First insulating barrier, it is arranged on the first metal layer；
Second insulating barrier, it is arranged on first insulating barrier；
3rd metal level, it is arranged on second insulating barrier, and is connected with the public electrode input of the display panel
Connect.
11. a kind of display device, including:
Display panel；
Compensation device as described in any one of claim 1 to 10；
A plurality of public electrode input line, for inputting public electrode input signal to the display panel；
A plurality of public electrode feedback line, for the public electrode feedback signal from the display panel to be input into the compensation
Device；
A plurality of public electrode compensating line, for the public electrode thermal compensation signal from the compensation device to be input into the display
Panel.
12. display device according to claim 11, wherein, the effective display area domain of the display panel is divided into many
Sub-regions,
Wherein, the compensation device is each arranged in correspondence with the multiple subregion, the compensation of each compensation device
Rate is set based on corresponding subregion position on said display panel.
13. display device according to claim 12, wherein, at the equidistant subregion of central shaft of display panel
The cancellation ratio of the compensation device of setting is equal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621046978.2U CN206441519U (en) | 2016-09-09 | 2016-09-09 | Compensation device and display device for display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621046978.2U CN206441519U (en) | 2016-09-09 | 2016-09-09 | Compensation device and display device for display panel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614317A (en) * | 2018-05-09 | 2018-10-02 | 京东方科技集团股份有限公司 | A kind of preparation method of polaroid, polaroid, display base plate and display device |
| CN109920383A (en) * | 2017-12-12 | 2019-06-21 | 咸阳彩虹光电科技有限公司 | A kind of common electrode voltage compensating device and method |
| CN112327530A (en) * | 2020-12-01 | 2021-02-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113178176A (en) * | 2021-04-25 | 2021-07-27 | Tcl华星光电技术有限公司 | Display device and mobile terminal |
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2016
- 2016-09-09 CN CN201621046978.2U patent/CN206441519U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920383A (en) * | 2017-12-12 | 2019-06-21 | 咸阳彩虹光电科技有限公司 | A kind of common electrode voltage compensating device and method |
| CN108614317A (en) * | 2018-05-09 | 2018-10-02 | 京东方科技集团股份有限公司 | A kind of preparation method of polaroid, polaroid, display base plate and display device |
| CN112327530A (en) * | 2020-12-01 | 2021-02-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113178176A (en) * | 2021-04-25 | 2021-07-27 | Tcl华星光电技术有限公司 | Display device and mobile terminal |
| CN113178176B (en) * | 2021-04-25 | 2023-11-28 | Tcl华星光电技术有限公司 | Display device and mobile terminal |
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