CN101826306B - Liquid crystal display device driving method and liquid crystal display device - Google Patents
Liquid crystal display device driving method and liquid crystal display device Download PDFInfo
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- CN101826306B CN101826306B CN 200910047283 CN200910047283A CN101826306B CN 101826306 B CN101826306 B CN 101826306B CN 200910047283 CN200910047283 CN 200910047283 CN 200910047283 A CN200910047283 A CN 200910047283A CN 101826306 B CN101826306 B CN 101826306B
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Abstract
A liquid crystal display device driving method includes: sending scanning signals to each row of pixel units; sending data signals to each row of pixel units; and modifying the data signal, and inserting black picture data of one scanning period into the data signal every at least one scanning period. And, a liquid crystal display device, comprising: the first data modifying unit is used for modifying the data signal and inserting black picture data of one scanning period into the data signal every at least one scanning period. The liquid crystal display device and the liquid crystal display device driving method can improve the phenomenon that the spot defect is easy to appear after the existing liquid crystal display panel is pressed.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly a kind of liquid crystal display apparatus driving circuit and liquid crystal indicator.
Background technology
Traditional liquid crystal display (LCD, Liquid Crystal Display) device adopts the one-way communication mode usually, only can show image according to the control signal of control system output.
In recent years, be accompanied by the high speed development of electronic technology, the display panels (or integrated display panels of pressing screen) of touch panel occurred having.When use has the electronic device of such display panels, the user can be directly presses display icon on the display panel with finger or light pen etc.,, after the order corresponding with the display icon of pressing, operate accordingly according to this this electronic device of order control again until the pressing detection unit inspection.This mode can reduce the demand to other types input equipment (keyboard, mouse or telepilot etc.), and is easier in the operation.
Owing to use to need, such liquid crystal indicator with touch panel often can be pressed, and to tend to cause display panels to show unusual and this is pressed.The below is that example is introduced with the display panels that adopts multizone homeotropic alignment (MVA, Multi-domain Vertical Alignment) display mode.
Fig. 1 is the schematic cross-section of the single pixel of display panels in the existing not making alive situation.As shown in Figure 1, this display panels comprises: first substrate 100, the second substrate 200 relative with first substrate 100, and the negative liquid crystal molecule 1 03 between first substrate 100 and second substrate 200, and on first substrate 100 inside surfaces, also be formed with projection 101.
As seen from Figure 1, because the existence of projection 101, near the liquid crystal molecule 103 the projection 101 is arranged in substantially vertical with respect to projection 101 surfaces, and has the state at certain angle of inclination with respect to first substrate 100 surfaces.That is, projection 101 provides a pre-tilt direction for liquid crystal molecule 103.
Fig. 2 is the schematic cross-section of the single pixel of the display panels in the existing making alive situation.As shown in Figure 2, when when this display panels applies voltage, under the acting in conjunction of projection 101 and electric field, the liquid crystal molecule 103 in each pixel is symmetrically rotation centered by projection 101, has formed multidomain structure.
Fig. 3 is existing making alive, do not press the schematic cross-section of the display panels in the situation.As shown in Figure 3, the liquid crystal molecule 103 in the whole display panels is arranged in uniform multidomain structure respectively centered by each projection 101, realized good viewing angle characteristic.
Fig. 4 is existing making alive, the schematic cross-section of the display panels in the situation of pressing is arranged.As shown in Figure 4, when pressing first substrate 100, the direction control that the orientation of liquid crystal molecule 103 is pressed, in liquid crystal cell, centered by press points 401, formed new domain structure, namely, press and destroyed near the press points 401 original multidomain structures of each pixel, caused the farmland chaotic, thereby caused near the asymmetric of the visual angle of press points.
Fig. 5 removes the schematic cross-section of pressing rear display panels in the existing making alive situation.As shown in Figure 5, remove press after, first substrate 100 has recovered original shape, and negative liquid crystal molecule 1 03 still the direction when pressing arrange, do not return to the arrangement before pressing.
Fig. 6 removes the schematic cross-section that is positioned at the single pixel of press points one side after pressing in the existing making alive situation.As shown in Figure 6, because of electric field to the effect of liquid crystal molecule 103 effect much larger than 101 pairs of liquid crystal molecules 103 of projection, remove press after, the part liquid crystal molecule 103 that is positioned near the single pixel of press points one side (left side or right side) still can't return to presses front arrangement, the overall alignment that causes the negative liquid crystal molecule 1 03 in the single pixel still is single domain, like this, be subjected to the impact of change in optical path length, near the press points viewing angle characteristic can become very poor, even the obvious spot defective (mura) that human eye can be observed occurs.
Summary of the invention
The invention provides a kind of liquid crystal display apparatus driving circuit and liquid crystal indicator, to improve the phenomenon that is prone to the spot defective after the available liquid crystal display panel is pressed.
A kind of liquid crystal display apparatus driving circuit provided by the invention comprises:
Send sweep signal to each row pixel cell;
Send data-signal to each row pixel cell;
Revise described data-signal, in described data-signal, insert the black picture data of a scan period every at least one scan period.
Alternatively, described Update Table signal is that the data-signal of whole display panels in the described liquid crystal indicator is made amendment; Alternatively, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment; Alternatively, before revising described data-signal, also comprise: detect described display panels and whether press, when detecting when pressing, revise described data-signal; Alternatively, described Update Table signal is that the data-signal of whole display panels in the described liquid crystal indicator is made amendment; Alternatively, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment; Alternatively, per second inserts n described black picture data, and n is natural number; The response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator alternatively, is less than the displaying time of described black picture data; Alternatively, the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode; Alternatively, the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
A kind of liquid crystal display apparatus driving circuit provided by the invention comprises:
Send sweep signal to each row pixel cell;
Send data-signal to each row pixel cell;
Detect described display panels and whether press, when detecting when pressing, revise described data-signal, in data-signal, insert the black picture data of at least one scan period.
Alternatively, determine pressing position, described Update Table signal is that the data-signal of described pressing position is made amendment; Alternatively, the scan period number that inserts described black picture data is less than or equal to presses lasting scan period number; The response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator alternatively, is less than the displaying time of described black picture data; Alternatively, the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode; Alternatively, the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
A kind of liquid crystal indicator provided by the invention comprises:
Display panels, described display panels have sweep trace, with data line and the pixel cell of described sweep trace cross arrangement;
Scan drive cell utilizes the transmit scan line sweep signal, opens successively or close each row pixel cell;
The data-driven unit utilizes data line to send data-signal to each row pixel cell;
The first data modification unit in order to revise described data-signal, inserts the black picture data of a scan period in described data-signal every at least one scan period.
Alternatively, described Update Table signal is that the data-signal of whole display panels in the described liquid crystal indicator is made amendment; Alternatively, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment; Alternatively, described liquid crystal indicator also comprises: the first signal detecting unit, whether press in order to determine display panels, when detecting when pressing, described data-signal is revised in described the first data modification unit, inserts the black picture data of a scan period in described data-signal every at least one scan period; Alternatively, described Update Table signal is that the data-signal of whole display panels in the described liquid crystal indicator is made amendment; Alternatively, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment; Alternatively, per second inserts n described black picture data, and n is natural number.
A kind of liquid crystal indicator provided by the invention comprises:
Display panels, described display panels have sweep trace, with data line and the pixel cell of described sweep trace cross arrangement;
Scan drive cell utilizes the transmit scan line sweep signal, opens successively or close each row pixel cell;
The data-driven unit utilizes data line to send data-signal to each row pixel cell;
The secondary signal detecting unit is in order to determine whether press on the display panels;
Described data-signal in order to detecting when pressing, is revised in the second data modification unit, inserts the black picture data of at least one scan period in data-signal.
Alternatively, detect press after, also in order to determine pressing position, described Update Table signal is that the data-signal of described pressing position is made amendment in described the second data modification unit; Alternatively, the scan period number that inserts described black picture data is less than or equal to presses lasting scan period number; The response time of the liquid crystal molecule of filling in the display panels of described liquid crystal indicator alternatively, is less than the displaying time of described black picture data; Alternatively, the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode; Alternatively, the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
Compared with prior art, technique scheme has the following advantages:
The liquid crystal display apparatus driving circuit that technique scheme provides, mode by inserting black picture data in data-signal, realization is to described display panels inserting black picture, can make the demonstration capacitor discharge of the pixel cell of inserting black picture, to reduce or to remove the voltage difference that shows the electric capacity two ends (this is as for the liquid crystal indicator of normal white mode; For the liquid crystal indicator of normal black pattern, can make the demonstration capacitor charging of the pixel cell of inserting black picture, to increase the voltage difference that shows the electric capacity two ends); Can make that liquid crystal molecule returns to the multidomain state of pressing before occuring in it, alleviate or eliminate by press the display panels visual angle that causes asymmetric, the bad phenomenon of display characteristic such as spot defective appears.
The liquid crystal indicator that technique scheme provides, added the data modification unit, with to described display panels inserting black picture, make the demonstration capacitor discharge of the pixel cell of inserting black picture, (this is for for the liquid crystal indicator of normal white mode to reduce or remove the voltage difference at these partial display electric capacity two ends; Liquid crystal indicator for normal black pattern, can make the demonstration capacitor charging of the pixel cell of inserting black picture, to increase the voltage difference that shows the electric capacity two ends), so that liquid crystal molecule returns to the multidomain state of pressing before occuring in it, alleviate the impact of pressing the display characteristic of display panels.
Description of drawings
Fig. 1 is the schematic cross-section of the single pixel of display panels in the existing not making alive situation;
Fig. 2 is the schematic cross-section of the single pixel of the display panels in the existing making alive situation;
Fig. 3 is existing making alive, do not press the schematic cross-section of the display panels in the situation;
Fig. 4 is existing making alive, the schematic cross-section of the display panels in the situation of pressing is arranged;
Fig. 5 removes the schematic cross-section of pressing rear display panels in the existing making alive situation;
Fig. 6 removes the schematic cross-section that is positioned at the single pixel of press points one side after pressing in the existing making alive situation;
Fig. 7 is the schematic equivalent circuit of liquid crystal indicator the first embodiment of the present invention;
Fig. 8 is the rotation situation synoptic diagram of the interior liquid crystal molecule of the single pixel in inserting black picture front and back among liquid crystal indicator the first embodiment of the present invention;
Fig. 9 be among other embodiment of liquid crystal indicator of the present invention near press points the schematic cross-section of the single pixel of display panels during inserting black picture.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Device of the present invention and disposal route can be widely used in the every field; and can utilize many suitable materials to make; the below is illustrated by specific embodiment; certainly the present invention is not limited to this specific embodiment, and the known general replacement of one of ordinary skilled in the art is encompassed in protection scope of the present invention far and away.
Secondly, the present invention utilizes synoptic diagram to describe in detail, when the embodiment of the invention is described in detail in detail, for convenience of explanation, the synoptic diagram of expression structure can be disobeyed general ratio and be done local the amplification, should be with this as limitation of the invention, in addition, in the making of reality, should comprise the three-dimensional space of length, width and the degree of depth.
Display panels can deform when being subject to pressing, so that near the turning to of liquid crystal molecule the press points departed from expection, is single domain state (seeing also Fig. 4); Even and press remove after, because being subject to pining down of electric field, multidomain state (seeing also Fig. 5,6) before this regional liquid crystal molecule still can't return to and be not pressed causes near the viewing angle characteristic of press points to become very poor, even the obvious spot defective that human eye can be observed occurs.
For improving this problem, the invention provides a kind of liquid crystal indicator, added the data modification unit, can be to described display panels inserting black picture, make the demonstration capacitor discharge of the pixel cell of inserting black picture, reduce or remove the voltage difference (take the liquid crystal indicator of normal white mode as example) at these partial display electric capacity two ends, so that liquid crystal molecule returns to the multidomain state of pressing before occuring in it, alleviate the impact of pressing the display characteristic of display panels.In other words, in liquid crystal indicator provided by the invention, utilize data modification unit inserting black picture, to reduce even to eliminate the mode of the electric field of arranging before the part liquid crystal molecule can't being returned to press after pressing, alleviate the impact of pressing the display characteristic of display panels (as, reduce the spot defective).
Liquid crystal indicator the first embodiment:
Fig. 7 is the schematic equivalent circuit of liquid crystal indicator the first embodiment of the present invention, below in conjunction with Fig. 7 liquid crystal indicator the first embodiment of the present invention is described in detail.
As shown in Figure 7, liquid crystal indicator as the first embodiment comprises display panels 700, described display panels 700 is for filling the MVA type display panel of negative liquid crystal molecule, and it has sweep trace 701, with the data line 702 of described sweep trace 701 cross arrangements and be arranged at sweep trace 701 and data line 702 infalls, be each pixel cell of the array format of the capable m row of n.Wherein, also comprise thin film transistor (TFT) 705 in each pixel cell, show electric capacity 703 and memory capacitance 704, and the grid of thin film transistor (TFT) 705 links to each other with sweep trace 701, and source electrode links to each other with data line 702, and drain electrode links to each other with show electrode end in the memory capacitance 704 with showing electric capacity 703; The other end of this demonstration electric capacity 703 is for extreme for the common electrical that applies common electric voltage; As example, it is extreme that the other end of memory capacitance 704 also can be common electrical, namely, the framework of memory capacitance is the mode of Cs on common (memory capacitance on the public electrode), just in processing procedure, described common electrical is extreme extremely to be positioned on the different substrate with the common electrical that links to each other with the other end that shows electric capacity 703 usually; Obviously, in other embodiments, the framework of memory capacitance 704 also can be the mode (memory capacitance on the scan electrode) of Cs ongate; In other words, described memory capacitance 704 both can be present between show electrode and the public electrode, also can be present between show electrode and the scan electrode.
This liquid crystal indicator also comprises scan drive cell 710, and it sends the grid of sweep signals thin film transistor (TFT) 705 to each row pixel cell by sweep trace 701, controls each row thin film transistor (TFT) 705 and opens successively or close; Data-driven unit 720, it sends data-signal to the source electrode of each row pixel cell by data line 702.
Liquid crystal indicator in the present embodiment also comprises the first data modification unit 730, it links to each other with data-driven unit 720, in order to revise described data-signal, in described data-signal, insert the black picture data of a scan period every at least one scan period.
In the presents, term " scan period " means scanner driver from scanning the first row sweep trace to having scanned the used time of last column sweep trace, namely shows the used time of a frame picture.
In the present embodiment, show that the common electrical of electric capacity 703 and memory capacitance 704 extremely links to each other with public electrode, it is extreme that common electric voltage puts on described common electrical via described public electrode; The show electrode end that shows electric capacity 703 and memory capacitance 704 links to each other with the drain electrode of thin film transistor (TFT) 705, data voltage puts on described show electrode end via described drain electrode, and (data-signal is sent to the source electrode of thin film transistor (TFT) 705 via data line 702, when described thin film transistor (TFT) 705 was opened, this data-signal just was sent to the show electrode end that shows electric capacity 703 and memory capacitance 704 by the drain electrode of thin film transistor (TFT) 705).When voltage difference is zero between show electrode end and common electrical are extreme, realize black picture disply, simultaneously, show that electric capacity 703 and memory capacitance 704 realize discharge.
The display panels rear appearance distortion that is pressed, be positioned near the turning to of liquid crystal molecule of press points and depart from expection, present single domain state, even press remove after, because being subject to pining down of electric field, multidomain state before this regional liquid crystal molecule still can't recover back to be not pressed is so that the display quality variation.By inserting black picture on display panels, removed the voltage difference that puts on the display panels two ends in the present embodiment, so that be positioned at the liquid crystal molecule of display panels the trend of getting back to the making alive front position has been arranged.
Described inserting black picture can insert in whole display panels, also can be to insert in the fixedly pressing area of display panels.Wherein said fixedly pressing area is according to user's needs, the pressing area of pre-designed display panels.
Fig. 8 is the rotation situation synoptic diagram of the interior liquid crystal molecule of the single pixel in inserting black picture front and back among liquid crystal indicator the first embodiment of the present invention.Liquid crystal molecule among Fig. 8 shown in the solid line is the arranging situation of liquid crystal molecule before the inserting black picture, and behind the inserting black picture, the liquid crystal molecule 103 shown in the solid line can rotate to the position shown in the dotted line.
In the present embodiment, by inserting black picture, can carry out compulsory resetting to negative liquid crystal molecule 1 03, make liquid crystal molecule 103 forward direction perpendicular to first substrate 100 to, and under the effect of projection 101, tend to get back to the multidomain state before pressing.So, by improving preferably whole display panels inserting black picture owing to press the phenomenon of the liquid crystal molecule farmland confusion that causes, and then solved because pressing near the problem of the viewing angle characteristic variation of press points that causes.
Because of the present invention mainly being contemplated that by inserting black picture solves owing to press the chaotic problem in the farmland that causes, therefore, other embodiment as liquid crystal indicator, described liquid crystal indicator also comprises: the first signal detecting unit, whether press in order to determine display panels, when detecting when pressing, described data-signal is revised in described the first data modification unit, inserts the black picture data of a scan period in described data-signal every at least one scan period.At this moment, only need operation with the inserting black picture data be controlled at fixedly in the pressing area, can solve the chaotic problem in above-mentioned farmland, and need not whole display panels inserting black picture, can reduce the defective because the demonstration that the inserting black picture operation causes is glimmered.Thus, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.In addition, in other embodiments, described Update Table signal can be that the data-signal of whole display panels in the described liquid crystal indicator is made amendment.
Display frame when the black picture among the application refers to that voltage difference is zero between the show electrode of display panels and the public electrode, it shows that data correspondence is called black picture data.In the practice, only need the control data-signal, make that voltage difference is zero between the show electrode of display panels and the public electrode, can obtain black picture disply.
Because the insertion that can not make human eye perceives arrive black picture, so the time of inserting black picture can not be too of a specified duration, usually, per second can insert described black picture data n time, and n is natural number.As, when the display frequency of picture is 60 frames/second, consider the resolution frequency of human eye, can insert the black picture of a frame take 30 scan periods or 60 scan period as cycles.In other words, in the practice, n gets 1 or 2 usually.
The response time of the liquid crystal molecule of filling in the described display panels in addition, is less than the displaying time of the black picture of every frame.As, when inserting the black picture of a frame take 60 scan period as cycles, the displaying time of the black picture of a frame is 16.67 milliseconds, less than 25 milliseconds of response times of common liquid crystals molecule 1 03.So, during the demonstration of the black picture of a frame, liquid crystal molecule 103 only has part can get back to the position shown in the dotted line, and when again powering up, under the effect of projection 101, get back to press before as shown in Figure 3 multidomain state, can play to a certain extent and improve the effect that shows.
For this reason, adopted the liquid crystal molecule that can respond fast (that is, the response time of described liquid crystal molecule can be less than or equal to 25 milliseconds, such as 16 milliseconds, 10 milliseconds or 8 milliseconds) in the present embodiment, so that liquid crystal molecule can recover the multidomain state quickly, display performance also is further improved.In sum, can to a certain degree alleviate the impact of pressing the display characteristic of display panels at whole picture inserting black picture.
In an again embodiment of liquid crystal indicator, described liquid crystal indicator comprises:
Display panels, described display panels have sweep trace, with data line and the pixel cell of described sweep trace cross arrangement;
Scan drive cell utilizes the transmit scan line sweep signal, opens successively or close each row pixel cell;
The data-driven unit utilizes data line to send data-signal to each row pixel cell;
The secondary signal detecting unit is in order to determine whether press on the display panels;
Described data-signal in order to detecting when pressing, is revised in the second data modification unit, inserts the black picture data of at least one scan period in data-signal.
After pressing, the farmland confusion will appear, detect press after, by the full wafer display panels being inserted the black picture data (a common frame gets final product) of at least one frame, to remove the voltage difference that shows between electric capacity and memory capacitance two-plate, make negative liquid crystal molecule 1 03 will be forced to reset, can make negative liquid crystal molecule 1 03 under the effect of projection 101, get back to multidomain position before pressing, to solve owing to press the problem of the liquid crystal molecule farmland confusion that causes.
In addition, in the another embodiment of liquid crystal indicator, detect press after, can utilize the secondary signal detecting unit to determine pressing position, also can only insert the black picture data of at least one frame to pressing position near zone on the display panels, can reduce because the demonstration flicker defective that the inserting black picture operation causes.
Fig. 9 be among other embodiment of liquid crystal indicator of the present invention near press points the schematic cross-section of the single pixel of display panels during inserting black picture.
As shown in Figure 9, near press points during inserting black picture, because the blocking of finger, this black picture can the observed person not observed.But after removing voltage, negative liquid crystal molecule 1 03 will be forced to reset, and namely negative liquid crystal molecule 1 03 forwards the direction of vertical upper substrate 100 to, and get back to the multidomain position before pressing under the effect of projection 101.So, can solve owing to press the problem of the liquid crystal molecule farmland confusion that causes at the press points inserting black picture.
Because the position of pressing is blocked and can the observed person not observed by finger, and because time of pressing is much larger than 25 milliseconds of response times of negative liquid crystal molecule 1 03, then can insert at the place of pressing the black picture of long period, be more frame number black picture, and the multidomain state before negative liquid crystal molecule 1 03 being got back to press.
Correspondingly, the present invention also provides a kind of liquid crystal display apparatus driving circuit, and as the first embodiment of liquid crystal display apparatus driving circuit, the method comprises:
Send sweep signal to each row pixel cell;
Send data-signal to each row pixel cell;
Revise described data-signal, in described data-signal, insert the black picture data of a scan period every at least one scan period.
Particularly, described display panels can adopt multizone homeotropic alignment display mode; Described display panels can adopt the negative liquid crystal molecule.
Before revising described data-signal, also comprise: detect described display panels and whether press, when detecting when pressing, revise described data-signal.
Described Update Table signal can be that the data-signal of whole display panels in the described liquid crystal indicator is made amendment; Described Update Table signal also can be that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.
Because the insertion that can not make human eye perceives arrive black picture, so the time of inserting black picture can not be too of a specified duration, usually, per second inserts n described black picture data, and n is natural number.As, when the display frequency of picture is 60 frames/second, consider the resolution frequency of human eye, can insert the black picture of a frame take 30 scan periods or 60 scan period as cycles.In other words, in the practice, n gets 1 or 2 usually.
The response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator in addition, is less than the displaying time of described black picture data.As, when inserting the black picture of a frame take 60 scan period as cycles, the displaying time of the black picture of a frame is 16.67 milliseconds, less than 25 milliseconds of response times of common liquid crystals molecule.So during the demonstration of the black picture of a frame, liquid crystal molecule only has part can get back to the position shown in the dotted line, and gets back to the multidomain state before pressing when again powering up under the effect of projection, can play to a certain extent and improve the effect that shows.
For this reason, adopted the liquid crystal molecule that can respond fast (that is, the response time of described liquid crystal molecule can be less than or equal to 25 milliseconds, such as 16 milliseconds, 10 milliseconds or 8 milliseconds) in the present embodiment, so that liquid crystal molecule can recover the multidomain state quickly, display performance also is further improved.In sum, can to a certain degree alleviate the impact of pressing the display characteristic of display panels at whole picture inserting black picture.
In other embodiment of liquid crystal display apparatus driving circuit, liquid crystal display apparatus driving circuit comprises: send sweep signal to each row pixel cell; Send data-signal to each row pixel cell; Detect described display panels and whether press, when detecting when pressing, revise described data-signal, in data-signal, insert the black picture data of at least one scan period.Especially, when detect press after, determine pressing position, described Update Table signal is that the data-signal of described pressing position is made amendment.
Near pressing position during inserting black picture, because the blocking of finger, this black picture can the observed person not observed.But after removing voltage, the negative liquid crystal molecule will be forced to reset, and namely the negative liquid crystal molecule forwards the direction of vertical upper substrate to, and get back to the multidomain position before pressing under the effect of projection.So, can solve owing to press the problem of the liquid crystal molecule farmland confusion that causes at the pressing position inserting black picture.
Because pressing position is blocked and can the observed person not observe by finger, and because time of pressing is much larger than 25 milliseconds of response times of negative liquid crystal molecule, then can insert at the place of pressing the black picture of long period, in other words, within per second shows frame number, can insert multiframe number more black picture (when showing that such as per second frame number is 60 frame, the per second of described black picture shows that frame number can be greater than 2 frames, as be 3 frames, 4 frames, 5 frames or 6 frames), and being got back to, the negative liquid crystal molecule presses front multidomain state.Usually, the scan period number that inserts described black picture data is less than or equal to presses lasting scan period number.The response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator is less than the displaying time of described black picture data.The display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode; The display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.Compare with the first embodiment, the second embodiment has solved the problem of pressing the farmland confusion that causes when not affecting display effect.
It should be noted that, what select in the embodiment of the invention is that each pixel only has a projection and is distributed on the upper substrate, the projection that different numbers can be arranged in each pixel as required, the distribution of described projection can be uniform, also can be inhomogeneous, position in the middle of corresponding described projection between the described projection or on the relative substrate of the described projection that distributes can also arrange carves seam, to realize the multizone display mode.
Although the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (21)
1. liquid crystal display apparatus driving circuit comprises:
Send sweep signal to each row pixel cell;
Send data-signal to each row pixel cell;
Revise described data-signal, insert the black picture data of a scan period every at least one scan period in described data-signal, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.
2. whether liquid crystal display apparatus driving circuit as claimed in claim 1 is characterized in that: before revising described data-signal, also comprise: detect described display panels and press, when detecting when pressing, revise described data-signal.
3. such as each described liquid crystal display apparatus driving circuit among the claim 1-2, it is characterized in that: per second inserts n described black picture data, and n is natural number.
4. such as each described liquid crystal display apparatus driving circuit among the claim 1-2, it is characterized in that: the response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator is less than the displaying time of described black picture data.
5. such as each described liquid crystal display apparatus driving circuit among the claim 1-2, it is characterized in that: the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode.
6. such as each described liquid crystal display apparatus driving circuit among the claim 1-2, it is characterized in that: the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
7. liquid crystal display apparatus driving circuit comprises:
Send sweep signal to each row pixel cell;
Send data-signal to each row pixel cell;
Whether detect described display panels presses, when detecting when pressing, revise described data-signal, insert the black picture data of at least one scan period in data-signal, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.
8. liquid crystal display apparatus driving circuit as claimed in claim 7 is characterized in that, also comprises: determine pressing position, described Update Table signal is that the data-signal of described pressing position is made amendment.
9. liquid crystal display apparatus driving circuit as claimed in claim 7, it is characterized in that: the scan period number that inserts described black picture data is less than or equal to presses lasting scan period number.
10. liquid crystal display apparatus driving circuit as claimed in claim 7 is characterized in that: the response time of the liquid crystal molecule of filling in the display panels in the described liquid crystal indicator is less than the displaying time of described black picture data.
11. liquid crystal display apparatus driving circuit as claimed in claim 7 is characterized in that: the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode.
12. liquid crystal display apparatus driving circuit as claimed in claim 7 is characterized in that: the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
13. a liquid crystal indicator comprises:
Display panels, described display panels have sweep trace, with data line and the pixel cell of described sweep trace cross arrangement;
Scan drive cell utilizes the transmit scan line sweep signal, opens successively or close each row pixel cell;
The data-driven unit utilizes data line to send data-signal to each row pixel cell;
The first data modification unit, in order to revise described data-signal, insert the black picture data of a scan period every at least one scan period in described data-signal, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.
14. liquid crystal indicator as claimed in claim 13, it is characterized in that, described liquid crystal indicator also comprises: the first signal detecting unit, whether press in order to determine display panels, when detecting when pressing, described data-signal is revised in described the first data modification unit, inserts the black picture data of a scan period in described data-signal every at least one scan period.
15. such as each described liquid crystal indicator among the claim 13-14, it is characterized in that: per second inserts n described black picture data, and n is natural number.
16. a liquid crystal indicator comprises:
Display panels, described display panels have sweep trace, with data line and the pixel cell of described sweep trace cross arrangement;
Scan drive cell utilizes the transmit scan line sweep signal, opens successively or close each row pixel cell;
The data-driven unit utilizes data line to send data-signal to each row pixel cell;
The secondary signal detecting unit is in order to determine whether press on the display panels;
It is characterized in that, also comprise: the second data modification unit, in order to detect when pressing, revise described data-signal, insert the black picture data of at least one scan period in data-signal, described Update Table signal is that the data-signal of the fixedly pressing area of display panels in the described liquid crystal indicator is made amendment.
17. liquid crystal indicator as claimed in claim 16 is characterized in that: detect press after, also in order to determine pressing position, described Update Table signal is that the data-signal of described pressing position is made amendment in described the second data modification unit.
18. liquid crystal indicator as claimed in claim 16 is characterized in that: the scan period number that inserts described black picture data is less than or equal to presses lasting scan period number.
19. liquid crystal indicator as claimed in claim 16 is characterized in that: the response time of the liquid crystal molecule of filling in the display panels of described liquid crystal indicator is less than the displaying time of described black picture data.
20. liquid crystal indicator as claimed in claim 16 is characterized in that: the display panels of described liquid crystal indicator adopts multizone homeotropic alignment display mode.
21. such as each described liquid crystal indicator among the claim 16-20, it is characterized in that: the display panels of described liquid crystal indicator adopts the negative liquid crystal molecule.
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| CN 200910047283 CN101826306B (en) | 2009-03-06 | 2009-03-06 | Liquid crystal display device driving method and liquid crystal display device |
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| CN 200910047283 CN101826306B (en) | 2009-03-06 | 2009-03-06 | Liquid crystal display device driving method and liquid crystal display device |
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| CN104483786B (en) * | 2014-12-30 | 2017-04-19 | 深圳市华星光电技术有限公司 | Liquid crystal display (LCD) panel and LCD device |
| CN108172182A (en) * | 2017-12-25 | 2018-06-15 | 昆山龙腾光电有限公司 | Black picture is inserted into circuit, display device and electronic equipment |
| CN112130360A (en) * | 2020-09-29 | 2020-12-25 | 厦门天马微电子有限公司 | Display panel, display device and display method |
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| KR20040013961A (en) * | 2002-08-09 | 2004-02-14 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and method for operating the same |
| CN101206546A (en) * | 2006-12-15 | 2008-06-25 | Lg.菲利浦Lcd株式会社 | Display device having multi-touch recognizing function and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20040013961A (en) * | 2002-08-09 | 2004-02-14 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and method for operating the same |
| CN101206546A (en) * | 2006-12-15 | 2008-06-25 | Lg.菲利浦Lcd株式会社 | Display device having multi-touch recognizing function and driving method thereof |
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