CN101320179B - LCD device - Google Patents
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- CN101320179B CN101320179B CN2007101264083A CN200710126408A CN101320179B CN 101320179 B CN101320179 B CN 101320179B CN 2007101264083 A CN2007101264083 A CN 2007101264083A CN 200710126408 A CN200710126408 A CN 200710126408A CN 101320179 B CN101320179 B CN 101320179B
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Abstract
The present invention discloses a liquid crystal display device which comprises a pixel array, a plurality of scanning beams, a plurality of data wires, a scanning signal module and a data signal processing module; wherein, the pixel array comprises a plurality of pixels; the scanning signal module conveys scanning signals to the pixels by scanning beams; the data signal processing module is coupled with the data wires for compensating and transforming received data signals to produce simulative voltage signals and for compensating positive voltage to the simulative voltage signals which are conveyed to the pixels through the data wires. The positive voltage compensation is reduced as the distance between each pixel and the input ends of the scanning wires is increased, so the problem of the uneven picture is solved.
Description
Technical field
The invention relates to a kind of liquid crystal indicator (Liquid Crystal Display, LCD), and particularly relevant for a kind of liquid crystal indicator that prevents picture inhomogeneous (image mura).
Background technology
At improving rapidly of multimedia society, be indebted to the tremendous progress of semiconductor element or man-machine display device mostly.With regard to display device, have that high image quality, space utilization efficient are good, the flat display apparatus of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.In various flat display apparatus, (Thin Film Transistor, TFT) liquid crystal indicator is again the most ripe flat display apparatus of present technology to thin film transistor (TFT).
It is the circuit diagram of an existing thin-film transistor LCD device that Fig. 1 illustrates.Please refer to Fig. 1, general liquid crystal indicator is positioned at the pixel P in the delegation
10A, P
10B, P
10C... thin film transistor (TFT) TFT
10A, TFT
10B, TFT
10C... all scan distribution (scan line) S10 and drive by same.When scanning distribution S10 enough cut-in voltage is provided, be connected to the thin film transistor (TFT) TFT that scans distribution S10
10A, TFT
10B, TFT
10C... will be opened, so that the data (voltage level) that each bar data wiring D10 is carried can write pixel P
10A, P
10B, P
10C....After above-mentioned write activity is finished, thin film transistor (TFT) TFT
10A, TFT
10B, TFT
10C... will be closed, and by pixel capacitance C
LCWith pixel storage capacitor C
STDeng each pixel P of maintenance
10A, P
10B, P
10C... the voltage level of interior pixel electrode (pixel electrode).
Fig. 2 illustrates and is the oscillogram of the thin film transistor (TFT) among Fig. 1 at each end points.Please refer to Fig. 1 and Fig. 2, V
gBe the grid potential (cut-in voltage of scan wiring) of thin film transistor (TFT), V
dBe the drain potential (voltage level of data wiring) of thin film transistor (TFT), V
sSource potential (voltage level of pixel electrode) for thin film transistor (TFT).As thin film transistor (TFT) TFT
10A, TFT
10B, TFT
10C... when being closed, each pixel P
10A, P
10B, P
10C... the voltage level of interior pixel electrode (Level) is easy to be subjected to the influence that voltage changes around other and changes, and this variation in voltage amount is called feed-trough voltage (Feed-through voltage), below represents it with Δ V.Feed-trough voltage can be expressed as:
ΔV＝(V
gh-V
gl)×[C
GS/(C
GS+C
ST+C
LC)]...(1)
Wherein, the C in the equation (1)
LCBe pixel capacitance, C
STBe pixel storage capacitor, C
GSBe the grid and the stray capacitance between source electrode (Parasitic Capacitor) of thin film transistor (TFT), (V
Gh-V
Gl) then for scanning the voltage difference of distribution when opening and closing thin film transistor (TFT).In the principle of work of liquid crystal indicator, mainly change the anglec of rotation of liquid crystal molecule by the electric field level that puts on liquid crystal molecule exactly, and then show various gray scale variation.Because putting on the electric field level of liquid crystal molecule is determined by the pixel electrode of each pixel and the voltage difference that has altogether with electrode (common electrode), therefore influenced by feed-trough voltage Δ V and when changing, will influence the display effect of liquid crystal indicator when the voltage level of pixel electrode.
Generally speaking, just can eliminate the influence that feed-trough voltage Δ V is caused via the voltage level of adjusting common electrode, for example, with the voltage level V of common electrode
ComBe adjusted to voltage level V '
ComYet, since the resistance in the scan wiring and the influence of other stray capacitances, feasible (V
Gh-V
Gl) meeting is along with the input end of pixel distance scan wiring is far away more and more little, that is pixel P shown in Figure 1
10A, P
10B, P
10C(V
Gh-V
Gl) can present (V
Gh-V
Gl)
10A＞(V
Gh-V
Gl)
10B＞(V
Gh-V
Gl)
10CPhenomenon.Therefore, according to equation (1), as the C of each pixel
LC, C
ST, C
GSWhen all identical, pixel P
10A, P
10B, P
10CFeed-trough voltage Δ V will present Δ V
10A＞Δ V
10B＞Δ V
10CPhenomenon and still have the uneven situation of feed-trough voltage Δ V, make the picture of liquid crystal indicator that situation inhomogeneous and flicker take place.
Summary of the invention
The present invention is a kind of liquid crystal indicator that provides for the above-mentioned shortcoming that overcomes the prior art existence, and this liquid crystal indicator has utilized the potential compensation technology of compensation data technology and storage capacitors, to improve the uneven situation of picture.
The present invention proposes a kind of liquid crystal indicator.This liquid crystal indicator comprises pel array, multi-strip scanning line, many data lines, sweep signal module and data-signal processing modules.Pel array comprises a plurality of pixels.Each bar sweep trace couples a row pixel respectively.Each bar data line couples one-row pixels respectively.The sweep signal module couples each bar sweep trace, to transmit a plurality of sweep signals to pixel via each bar sweep trace.The data-signal processing module couples each bar data line, in order to compensating conversion for a plurality of digital data signals that received producing a plurality of analog voltage signals, and makes analog voltage signal obtain voltage compensation.Wherein, analog voltage signal is passed to each pixel via each bar data line, and is to reduce with the distance increase of each row pixel with the input end of corresponding scanning beam at the voltage compensation that each row pixel pairing analog voltage signal obtains.
In one embodiment of this invention, the data-signal processing module of above-mentioned liquid crystal indicator is that digital data signal is adjusted, so that analog voltage signal obtains voltage compensation.
Wherein, the data-signal processing module for example has timing control unit and a plurality of driver element.Timing control unit receiving digital data signal is also adjusted so that analog voltage signal obtains voltage compensation, and adjusted numerical data is orderly sent to driver element.
Perhaps, the data-signal processing module for example has timing control unit and a plurality of driver element.Timing control unit receiving digital data signal also is passed to driver element in regular turn.Driver element signal is to digital data adjusted so that analog voltage signal obtains voltage compensation.
In one embodiment of this invention, the data-signal processing module has digital analog converter.The data-signal processing module is to convert the digital data signal corresponding to the different rows pixel to analog voltage signal according to different character used in proper names and in rendering some foreign names Maqu line mappings, so that analog voltage signal obtains voltage compensation.
The present invention proposes a kind of liquid crystal indicator.This liquid crystal indicator comprises pel array, multi-strip scanning line, many data lines, sweep signal module, data-signal modules and stores the current potential supply.Pel array comprises a plurality of pixels.Each pixel comprises transistor, storage capacitors and pixel capacitance.Transistor has gate terminal, first end and second end.First end of storage capacitors is coupled to transistorized second end.Each bar sweep trace couples the gate terminal of a rowed transistor respectively.Each bar data line couples transistorized first end of delegation respectively.The sweep signal module couples each bar sweep trace, to transmit a plurality of sweep signals to each pixel via each bar sweep trace.The data-signal module couples each bar data line, to transmit a plurality of data-signals to each pixel via each bar data line.Store second end that the current potential supply couples storage capacitors.This stores current potential supply and provides and store current potential to each pixel, and the capacitance of the storage capacitors of each row pixel is reduced with the distance increase with the input end of corresponding scanning beam of each row pixel of correspondence.
In one embodiment of this invention, liquid crystal indicator comprises that more store equipotential line, and each bar stores equipotential line and couples second end that stores a current potential supply and a row storage capacitors respectively.
In one embodiment of this invention, liquid crystal indicator comprises that more store equipotential line.Each bar stores equipotential line and couples second end that stores current potential supply and delegation's storage capacitors respectively, and each bar storage storage current potential that equipotential line transmitted differs from one another.
In one embodiment of this invention, the sweep signal module of liquid crystal indicator provides first signal source and secondary signal source.First signal source is by the first side input scan signal of pel array, with the pixel of first block that drives pel array.The secondary signal source is by the second side input scan signal of pel array, with the pixel of second block that drives pel array.
In liquid crystal indicator of the present invention, the capacitance of each row pixel pairing storage capacitors or the voltage compensation of analog voltage signal are that the distance increase with the input end of this row pixel and corresponding scanning beam reduces, to improve the situation of picture inequality.
Description of drawings
For above-mentioned feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and cooperate appended graphicly, be described in detail below.
It is the circuit diagram of an existing thin-film transistor LCD device that Fig. 1 illustrates.
It is the feed-trough voltage synoptic diagram of an existing liquid crystal indicator that Fig. 2 illustrates.
Fig. 3 is the synoptic diagram according to the liquid crystal indicator of the first embodiment of the present invention.
Fig. 4 is the synoptic diagram according to the liquid crystal indicator of the second embodiment of the present invention.
Fig. 5 A is the synoptic diagram according to the liquid crystal indicator of the third embodiment of the present invention.
Fig. 5 B is the character used in proper names and in rendering some foreign names Maqu line synoptic diagram according to the pairing positive polarity of each bar data line of the third embodiment of the present invention.
Fig. 6 is the synoptic diagram according to the liquid crystal indicator of the fourth embodiment of the present invention.
Fig. 7 is the synoptic diagram according to the liquid crystal indicator of the fifth embodiment of the present invention.
Fig. 8 is the synoptic diagram according to the liquid crystal indicator of the sixth embodiment of the present invention.
Fig. 9 A is the synoptic diagram according to the liquid crystal indicator of the seventh embodiment of the present invention.
Fig. 9 B is the synoptic diagram according to the liquid crystal indicator of the eighth embodiment of the present invention.
Fig. 9 C is the synoptic diagram according to the liquid crystal indicator of the ninth embodiment of the present invention.
The main element symbol description is as follows among the figure:
P
10A, P
10B, P
10C, P11, P13, P21, P23, P31, P33, P41, P43: pixel
TFT
10A, TFT
10B, TFT
10C: thin film transistor (TFT)
S10: scan distribution
D10: data wiring
V
g: the grid potential of thin film transistor (TFT)
V
d: the drain potential of thin film transistor (TFT)
V
s: the source potential of thin film transistor (TFT)
Δ V: feed-trough voltage
V
Com, V
Com': the voltage level of common electrode
V
Gh: scan the noble potential of distribution when opening thin film transistor (TFT)
V
Gl: scan the noble potential of distribution when closing thin film transistor (TFT)
S11, S13, S15, S17: sweep trace
D11, D13, D15, D17: data line
10: pel array
20,22: the sweep signal module
30,32,34: the data-signal processing module
40: sequential control circuit
50,52,54,56: driver element
60,62: digital analog converter
70: store the current potential supply
80: the data-signal module
300,400,500,600,700,800,900,1000,1100: liquid crystal indicator
T11: transistor
C11: storage capacitors
C13: pixel capacitance
V
c: common potential
L11, L13, L15, L17: store equipotential line
Embodiment
Fig. 3 is the synoptic diagram according to the liquid crystal indicator of the first embodiment of the present invention.Please refer to Fig. 3, liquid crystal indicator 300 comprises pel array 10, multi-strip scanning line (representing with sweep trace S11, S13), many data lines (representing with data line D11, D13), sweep signal module 20 and data-signal processing module 30.Pel array 10 comprises a plurality of pixels (representing with pixel P11, P13, P21 and P23).The sweep trace quantity of present embodiment, data line quantity and pixel quantity describe with two, two, four respectively.This area has knows that usually the knowledgeable should know, " the sweep trace quantity " that present embodiment is given an example, " data line quantity " only are specific embodiments with " pixel quantity ", in a further embodiment, " sweep trace quantity ", " data line quantity " can be other quantity with " pixel quantity ", so the present invention should not be defined in this kind specific embodiment.
Hold above-mentionedly, each bar sweep trace couples a row pixel respectively.For example, sweep trace S11 couples pixel P11, P21, and sweep trace S13 couples pixel P13, P23.Each bar data line couples one-row pixels respectively.For example, data line D11 couples pixel P11, P13.Data line D13 couples pixel P21, P23.Sweep signal module 20 couples sweep trace S11, S13.Sweep signal module 20 is transmitted a plurality of sweep signals respectively to pixel P11, P21 and P13, P23 via sweep trace S11, S13.Data-signal processing module 30 couples data line D11, D13.
At first, by data-signal processing module 30 receiving digital data signals.Then data-signal processing module 30 compensates conversion to produce a plurality of analog voltage signals at digital data signal, makes analog voltage signal obtain voltage compensation simultaneously.Wherein, analog voltage signal is passed to pixel P11, P13 and P21, P23 respectively via data line D11, D13, and is to reduce with the distance increase of each row pixel with the input end of corresponding scanning beam at the voltage compensation that each row pixel pairing analog voltage signal obtains.It should be noted that this area has knows that usually the knowledgeable can change the mode of its compensation according to its demand.For example, behind data-signal processing module 30 receiving digital data signals, promptly compensate at digital data signal.Then, the digital data signal after will compensating again converts analog voltage signal to, so that analog voltage signal obtains voltage compensation.Again for example, when digital data signal converts analog voltage signal to, compensate simultaneously, so that analog voltage signal obtains the positive voltage compensation.
In the present embodiment, each pixel P11, the P13 (one-row pixels) that data line D11 is coupled and sweep signal module 20 couple distance be considered as identical, that is the coupling of pixel P11 and sweep signal module 20 apart from the distance that couples that is equal to pixel P13 and sweep signal module 20.Therefore, in identical voltage compensation mode the pairing analog voltage signal of pixel (P11, P13) with delegation is compensated.With the pixel of delegation is that group compensates its advantage and is to save cost.By that analogy, each pixel of coupling of data line D13 also is considered as identical with the distance that couples of sweep signal module 20.Therefore, in identical voltage compensation mode the pairing analog voltage signal of pixel (P21, P23) with delegation is compensated.
In other words, the input end (sweep signal module 20) of the pixel P11 that data line D11 is coupled, P13 range sweep line is nearer, and the input end (sweep signal module 20) of the pixel P21 that data line D13 is coupled, P23 range sweep line is far away.Therefore, the resulting voltage compensation of the pairing analog voltage signal of pixel P11, P13 can be greater than the resulting voltage compensation of the pairing analog voltage signal of pixel P21, P23.In another embodiment, if with each pixel of delegation and coupling apart from inequality of sweep signal module 20, this area has knows that usually the knowledgeable also can be respectively along with coupling apart from increasing (attenuation degree of the sweep signal that each pixel received) of each pixel and sweep signal module 20 gives each pixel voltage compensation that pairing analog voltage signal successively decreases.Thus, just solved feed-trough voltage Δ V along with the input end of each pixel distance sweep signal is far and near different and cause the uneven problem of picture.
Fig. 4 is the synoptic diagram according to the liquid crystal indicator of the second embodiment of the present invention.Please refer to Fig. 4, in the present embodiment, liquid crystal indicator 400 has comprised multi-strip scanning line (representing with sweep trace S11, S13), many data lines (representing with data line D11, D13, D15, D17), data-signal processing module 32, sweep signal module 20 and pel array 10.Data-signal processing module 32 has comprised sequential control circuit 40 and a plurality of driver elements (representing with driver element 50 and 52).This area has knows that usually the knowledgeable should know, along with the size change of pel array is big, each manufacturer can be divided into a plurality of zones with each pixel of pel array 10 for the ease of driving pel array 10, and drives each regional pixel with different driver element collocation data lines.In the present embodiment, driver element 50 sees through data line D11, D13 pixel P11, P13, P21 and P23 is driven, and driver element 52 sees through data line D15, D17 pixel P31, P33, P41 and P43 are driven.By that analogy, sweep signal module 20 also can be divided into a plurality of driver elements the pixel of zones of different is driven, and then will not give unnecessary details at this.
Hold above-mentioned, behind the time schedule controller 40 receiving digital data signals, adjust digital data signal by time schedule controller 40, and the digital analog converters (not illustrating) that adjusted numerical data is seen through in the driver element 50,52 convert analog voltage signal to, so that the corresponding analog voltage signal of each row pixel obtains voltage compensation.Analog voltage signal is sent to pixel P11, P13, P21 and P23, pixel P31, P33, P41 and P43 respectively, to drive each pixel.The positive voltage compensation that the pairing analog voltage signal of each row pixel obtains is reducing apart from increasing with the input end of each row pixel and corresponding scanning beam.That is the resulting voltage compensation of the corresponding analog voltage signal of voltage compensation＞pixel P21, P23＞resulting voltage compensation of the corresponding analog voltage signal of pixel P31, P33＞resulting voltage compensation of the corresponding analog voltage signal of pixel P41, P43 of obtaining of the corresponding analog voltage signal of pixel P11, P13.Thus, then can solve the phenomenon of left and right sides picture inequality.
Please continue with reference to Fig. 4, the present technique field has knows also visual its demand of the knowledgeable usually, and the enlightenment of foundation spirit of the present invention and aforementioned all embodiment replaces the sequential control circuit 40 of the foregoing description to carry out the adjustment of digital data signal with other device or unit with function of adjusting digital data signal.For example, in another embodiment, also be passed to driver element 50,52 in regular turn by timing control unit 40 receiving digital data signals.Driver element 50,52 signal is to digital data adjusted (compensation), utilizes the digital analog converter (not illustrating) in the driver element 50,52 to convert digital data signal to analog voltage signal again, so that analog voltage signal obtains the positive voltage compensation.
Hold above-mentionedly, wherein each the row pairing analog voltage signal of pixel resulting voltage compensation is to reduce with the distance increase of each row pixel with the input end of corresponding scanning beam.That is the resulting voltage compensation of the corresponding analog voltage signal of pixel P11, P13＞resulting voltage compensation of the corresponding analog voltage signal of pixel P21, P23＞resulting voltage compensation of the corresponding analog voltage signal of pixel P31, P33＞resulting voltage compensation of the corresponding analog voltage signal of pixel P41, P43.Thus, can solve the problem of the different film flickers that cause of feed-trough voltage Δ V of each row pixel.
Fig. 5 A is the synoptic diagram according to the liquid crystal indicator of the third embodiment of the present invention.Please refer to Fig. 5 A, liquid crystal indicator 500 has comprised sweep trace S11, S13, data line D11, D13, D15, D17, data-signal processing module 34, sweep signal module 20 and pel array 10.Pel array 10, sweep signal module 20, sweep trace S11, S13, data line D11, D13, D15, D17, pixel P11, P13, P21, P23, P31, P33, P41, P43 and sequential control circuit 40 are identical with the above embodiments, do not repeat them here.In the present embodiment, each driver element has comprised at least one digital analog converter respectively.In the present embodiment, driver element 54 has comprised digital analog converter 60, and driver element 56 has comprised digital analog converter 62.In other embodiments, driver element also can comprise a plurality of digital analog converters, does not repeat them here.Digital analog converter 60,62 utilizes character used in proper names and in rendering some foreign names Maqu line to convert the digital data signal mapping to analog voltage signal.It should be noted that and also can carry out the positive voltage compensation to the corresponding analog voltage signal of each row pixel in the lump when utilizing character used in proper names and in rendering some foreign names Maqu line to convert the digital data signal mapping to analog voltage signal.
Fig. 5 B is the pairing character used in proper names and in rendering some foreign names of each the bar data line Maqu line synoptic diagram according to the third embodiment of the present invention.Please at the digital data signal that transfers to the different pieces of information line, give different character used in proper names and in rendering some foreign names Maqu lines and shine upon conversion simultaneously with reference to Fig. 5 A and Fig. 5 B.Above-mentioned character used in proper names and in rendering some foreign names Maqu line is along with the distance of each row pixel and sweep signal module 20 gives each voltage compensation that row pixel corresponding simulating voltage signal increases progressively.A is the character used in proper names and in rendering some foreign names Maqu line synoptic diagram of data line D11 among Fig. 5 B; B is the character used in proper names and in rendering some foreign names Maqu line synoptic diagram of data line D13; C is the character used in proper names and in rendering some foreign names Maqu line synoptic diagram of data line D15; D is the character used in proper names and in rendering some foreign names Maqu line synoptic diagram of data line D17.It should be noted that in addition the character used in proper names and in rendering some foreign names Maqu line that is illustrated among Fig. 5 B only is a specific embodiment, this area has knows that usually the knowledgeable can select suitable character used in proper names and in rendering some foreign names Maqu line according to its demand.Thus, then can avoid each row pixel because of the different phenomenons that cause left and right sides picture inequality of feed-trough voltage Δ V.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes sweep signal modules configured framework according to the enlightenment of spirit of the present invention and aforementioned all embodiment.For example, Fig. 6 is the synoptic diagram according to the liquid crystal indicator of the fourth embodiment of the present invention.Please refer to Fig. 6, liquid crystal indicator 600 has comprised sweep trace S11, S13, data line D11, D13, D15, D17, data-signal processing module 30, sweep signal module 22 and pel array 10.In the present embodiment, two zones about pel array 10 is divided into.Sweep signal module 22 comprises first signal source (not illustrating) and secondary signal source (not illustrating).First signal source is in order to drive the pixel of pel array 10 left sides, and the secondary signal source is in order to drive the pixel of pel array 10 right-hand parts.In other words, first signal source sees through sweep trace S11, the S13 input scan signal pixel with the zone, left side that drives pel array 10 by the left side of pel array 10, and the secondary signal source sees through sweep trace S15, the S17 input scan signal pixel with the right-hand part zone that drives pel array 10 by the right side of pel array 10.
Hold above-mentioned, owing to feed-trough voltage Δ V can reduce along with the path increase that couples of each row pixel and sweep signal module 22.Therefore, according to the path distance that couples of each row pixel and sweep signal module 22 analog voltage signal is carried out in various degree voltage compensation.The resulting voltage compensation of each row pairing analog voltage signal of pixel is reducing apart from increasing with the input end of each row pixel and corresponding scanning beam.That is the resulting voltage compensation of the corresponding analog voltage signal of pixel P11, P13＞resulting voltage compensation of the corresponding analog voltage signal of pixel P21, P23.The resulting voltage compensation of the corresponding analog voltage signal of pixel P41, the P43＞resulting voltage compensation of the corresponding analog voltage signal of pixel P31, P33.Thus, can solve the flicker of the different pictures that cause of feed-trough voltage Δ V of each row pixel.
Fig. 7 is the synoptic diagram according to the liquid crystal indicator of the fifth embodiment of the present invention.Please refer to Fig. 7, liquid crystal indicator 700 comprises pel array 10, sweep trace S11, S13, data line D11, D13, pixel P11, P13, P21 and P23, sweep signal module 20, data-signal module 80, stores current potential supply 70.Wherein pel array 10, sweep trace S11, S13, data line D11, D13, sweep signal module 20 are identical with the above embodiments, do not repeat them here.Data-signal module 80 is also similar with data-signal processing module 30.Difference is, data-signal module 80 is not because feed-trough voltage and signal or analog voltage signal compensate to digital data.
Pixel P11, P13, P21 and P23 have respectively comprised transistor T 11, storage capacitors C11 and pixel capacitance C13 as can be seen from Figure 7.Transistor T 11 has gate terminal, first end and second end.First end of storage capacitors C11 is coupled to second end of transistor T 11.First end of pixel capacitance C13 and second end are respectively coupled to second end and the common potential V of transistor T 11
cSweep trace S11, S13 couple the gate terminal of a rowed transistor respectively.Data line D11, D13 couple transistorized first end of delegation respectively.
It should be noted that the relation between pixel P11, P13, P21, P23 and the storage current potential supply 70.Store second end that current potential supply 70 couples storage capacitors C13.Store current potential supply 70 and store current potential to pixel P11, P13, P21 and P23, make capacitance the reducing with the input end (sweep signal module 20) of pixel P11, P13, P21 and P23 and corresponding scanning beam respectively of the storage capacitors C11 of pixel P11, P13, P21 and P23 apart from increase in order to provide.In other words, the resulting capacitance of storage capacitors C11 of the resulting capacitance of the storage capacitors C11 of pixel P11＞pixel P21.The resulting capacitance of storage capacitors C11 of the resulting capacitance of the storage capacitors C11 of pixel P13＞pixel P23.So, can cause the uneven problem of feed-trough voltage Δ V through sweep trace S11, S13 transmission scan signal because of decay by compensated scanning signaling module 20.
The present technique field has knows also visual its demand of the knowledgeable usually, and according to the capacitance of spirit of the present invention and the storage capacitors C11 that makes pixel P11, P13, P21 and P23 in various mode reducing apart from increase with the input end (sweep signal module 20) of pixel P11, P13, P21 and P23 and corresponding scanning beam respectively.For example, utilize many to store equipotential lines (representing) to provide different storage current potential to each pixel (P11, P13, P21 and P23) to store equipotential line L11, L13.
For instance, in the present embodiment, store equipotential line L11, L13 and couple second end that stores current potential supply 70 and the storage capacitors C11 of delegation respectively.Because each storage capacitors C11 of one-row pixels couples apart from identical with the sweep signal module.In other words, the feed-trough voltage Δ V of one-row pixels can be considered identical.Therefore, provide identical building-out capacitor value storage capacitors C11, relend by storing equipotential line L13 the identical building-out capacitor value storage capacitors C11 to delegation is provided to delegation by storing equipotential line L11.Because the impedance phase that stores equipotential line L11, L13 is when little, therefore, the capacitance of the storage capacitors gained of the capacitance Bu Chang ≒ pixel P23 of the storage capacitors gained of the capacitance compensation＞pixel P21 of the storage capacitors gained of the capacitance Bu Chang ≒ pixel P13 of the storage capacitors gained of pixel P11 compensation.Above-mentioned practice advantage is, is that group compensates the problem of the feed-trough voltage Δ V inequality that has not only solved each pixel and can significantly save cost with the one-row pixels.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes sweep signal modules configured framework according to the enlightenment of spirit of the present invention and aforementioned all embodiment.For example, Fig. 8 is the synoptic diagram according to the liquid crystal indicator of the sixth embodiment of the present invention.Please refer to Fig. 8, liquid crystal indicator 800 has comprised data-signal module 80, sweep signal module 22, sweep trace S11, S13, data line D11, D17, pel array 10 and has stored current potential supply 70.In the present embodiment, two zones about pel array 10 is divided into.Sweep signal module 22 comprises first signal source (not illustrating) and secondary signal source (not illustrating).First signal source is in order to drive the pixel of pel array 10 left sides, and the secondary signal source is in order to drive the pixel of pel array 10 right-hand parts.In other words, first signal source sees through sweep trace S11, the S13 input scan signal pixel with the zone, left side that drives pel array 10 by the left side of pel array 10, and the secondary signal source sees through sweep trace S15, the S17 input scan signal pixel with the right-hand part zone that drives pel array 10 by the right side of pel array 10.
Hold above-mentioned, owing to feed-trough voltage Δ V can increase and to reduce along with the path that couples of each pixel and sweep signal module 22.Therefore, storing 70 of current potential supplies sees through many and stores equipotential lines (representing to store equipotential line L11, L13) to provide different storage current potential to each pixel (P11, P13, P21 and P23).The path distance that couples according to each pixel and sweep signal module 22 compensates with the capacitance that the storage capacitors C11 that stores 70 pairs of each pixels of current potential supply carries out in various degree again.The capacitance compensation that the pairing storage capacitors C11 of each pixel obtains is reducing apart from increasing with the input end of each pixel and corresponding scanning beam.Thus, can solve the problem of the different film flickers that cause of feed-trough voltage Δ V of each row pixel.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes the configuration frame that stores equipotential line according to the enlightenment of spirit of the present invention and aforementioned all embodiment.For example, Fig. 9 A is the synoptic diagram according to the liquid crystal indicator of the seventh embodiment of the present invention.Please refer to Fig. 9 A, liquid crystal indicator 900 has comprised data-signal module 80, sweep signal module 20, sweep trace S11, S13, data line D11, D13, pel array 10 and has stored current potential supply 70.In the present embodiment, store equipotential line L15, L17 and couple second end that stores a current potential supply 70 and a row storage capacitors C11 respectively.Owing to store the resistance value that equipotential line L15, L17 have certain degree, therefore store current potential supply 70 and can pass the current potential of decay via storing the storage capacitors C11 that equipotential line L15, L17 offer a row pixel respectively.
Owing to feed-trough voltage Δ V can reduce along with the path increase that couples of each pixel and sweep signal module 22.Therefore, see through and store equipotential line L15 and can supply storage capacitors C11 that different potential values gives pixel P11 and the storage capacitors C11 of pixel P21 to store current potential supply 70.Store current potential supply 70 and see through the different potential value of storage equipotential line L17 supply again to the storage capacitors C11 of pixel P13 and the storage capacitors C11 of pixel P23.The capacitance compensation that the pairing storage capacitors C11 of each pixel is obtained is reducing apart from increasing with the input end of each pixel and corresponding scanning beam.Thus, can solve the problem of the different film flickers that cause of feed-trough voltage Δ V of each row pixel.
Hold above-mentionedly, the present technique field has knows also visual its demand of the knowledgeable usually, and changes the current potential that storage current potential supply 70 is provided according to the enlightenment of spirit of the present invention and aforementioned all embodiment.For instance, if the current potential that storing current potential supply 70 provides is a positive potential, the current potential that storage capacitors C11 obtained of current potential＞pixel P21 that storage capacitors C11 obtained of pixel P11 then, the current potential that storage capacitors C11 obtained of current potential＞pixel P23 that storage capacitors C11 obtained of pixel P13; Anti-, if the current potential that storing current potential supply 70 provides is a negative potential, the current potential that storage capacitors C11 obtained of current potential＜pixel P21 that storage capacitors C11 obtained of pixel P11 then, the current potential that storage capacitors C11 obtained of current potential＜pixel P23 that storage capacitors C11 obtained of pixel P13.Changing speech, is that distance increase with the input end of each pixel and corresponding scanning beam reduces spirit promptly according to the invention as long as see through capacitance compensation that the potential compensation line obtains the pairing storage capacitors C11 of each pixel.
The above embodiments, it is identical with the input direction of the signal of the sweep signal module 20 row pixel that offers to store current potential supply 70.The present technique field has knows also visual its demand of the knowledgeable usually, and the input direction of the signal that the enlightenment of foundation spirit of the present invention and aforementioned all embodiment change storage current potential supply 70 is provided.For example, Fig. 9 B is the synoptic diagram according to the liquid crystal indicator of the eighth embodiment of the present invention.Please refer to Fig. 9 B, liquid crystal indicator 1000 has comprised data-signal module 80, sweep signal module 20, sweep trace S11, S13, data line D11, D13, pel array 10 and has stored current potential supply 70.It should be noted that storage current potential supply 70 is opposite with the input direction of the signal of the sweep signal module 20 row pixel that offers among Fig. 9 B.
Again for example, Fig. 9 C is the synoptic diagram according to the liquid crystal indicator of the ninth embodiment of the present invention.Please refer to Fig. 9 C, liquid crystal indicator 1100 has comprised data-signal module 80, sweep signal module 20, sweep trace S11, S13, data line D11, D13, pel array 10 and has stored current potential supply 70.It should be noted that and utilize two to store the two ends that current potential supply 70 couples storage equipotential line L15, L17 among Fig. 9 C.Therefore, can flexibly switch the input direction of the signal that offers a row pixel.Thus, also can solve the problem of the different film flickers that cause of feed-trough voltage Δ V of each row pixel.
It should be noted, the various embodiments described above graphic only express each member between electrical connection, but not be used to illustrate each member between the provider location relation.
In sum, in the liquid crystal indicator of each embodiment of the invention described above, have following advantage:
1, the distance that couples along with each pixel and sweep signal module increases, and promptly the attenuation degree of the sweep signal that each pixel received increases, and gives each pixel voltage compensation that pairing analog voltage signal successively decreases.Therefore, solved feed-trough voltage Δ V and caused the uneven problem of picture along with the far and near difference of the input end of each pixel distance sweep trace.
2, utilize sequential control circuit or driver element to digital data signal adjust, make the pairing analog voltage signal of each pixel obtain voltage compensation.Voltage compensation is then along with the distance that couples of each pixel and sweep signal module increases and reduces.Therefore, solve the problem of the different film flickers that cause of feed-trough voltage Δ V of each row pixel.
3, the different characters used in proper names and in rendering some foreign names of digital analog converter utilization Maqu line converts the corresponding digital data signal mapping of each row pixel to analog voltage signal, so that the corresponding analog voltage signal of each row pixel is carried out different voltage compensations.Whereby, improve each row pixel because of the different phenomenons that cause the picture inequality of feed-trough voltage Δ V.
4, utilize to store the current potential supply the different storage capacitors that store current potentials to each row pixel are provided, the capacitance of the storage capacitors of each pixel is reduced with the distance increase of the input end of each pixel and corresponding scanning beam.Cause the problem of feed-trough voltage Δ V inequality so as to compensated scanning signal attenuation.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is with being as the criterion that claims were defined.
Claims (6)
1. a liquid crystal indicator is characterized in that, comprising:
One pel array comprises a plurality of pixels;
Multi-strip scanning line, each sweep trace couple the described pixel of row respectively;
Many data lines, each data line couple the described pixel of delegation respectively;
The one scan signaling module couples described sweep trace to transmit a plurality of sweep signals via described sweep trace to described pixel; And
One data-signal processing module, couple described data line, in order to compensate conversion to produce a plurality of analog voltage signals for a plurality of digital data signals that received, and make described analog voltage signal obtain voltage compensation, wherein said analog voltage signal is passed to described pixel via described data line, and is that distance increase with the input end of this row pixel and pairing this sweep trace reduces at the voltage compensation that each row described pixel pairing described analog voltage signal obtains.
2. liquid crystal indicator as claimed in claim 1 is characterized in that, described data-signal processing module is that described digital data signal is adjusted, so that described analog voltage signal obtains voltage compensation.
3. liquid crystal indicator as claimed in claim 2, it is characterized in that, described data-signal processing module has a sequential control module and a plurality of driver element, this timing control unit receives described digital data signal and adjusts so that described analog voltage signal obtains voltage compensation, and adjusted described numerical data is orderly sent to described driver element.
4. liquid crystal indicator as claimed in claim 2, it is characterized in that, described data-signal processing module has a sequential control module and a plurality of driver element, this timing control unit receives described digital data signal and is passed to described driver element in regular turn, and described driver element is adjusted so that described analog voltage signal obtains voltage compensation described digital data signal.
5. liquid crystal indicator as claimed in claim 1, it is characterized in that, described data-signal processing module has a digital analog converter, this data-signal processing module is to convert the described digital data signal corresponding to the different rows pixel to described analog voltage signal according to different character used in proper names and in rendering some foreign names Maqu line mappings, so that described analog voltage signal obtains voltage compensation.
6. liquid crystal indicator as claimed in claim 1, it is characterized in that, described sweep signal module comprises one first signal source and a secondary signal source, this first signal source is imported described sweep signal to drive the pixel of one of this pel array first block by first side of this pel array, and described sweep signal is imported to drive the pixel of one of this pel array second block by second side of this pel array in described secondary signal source.
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| CN2007101264083A CN101320179B (en) | 2007-06-06 | 2007-06-06 | LCD device |
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| CN2007101264083A CN101320179B (en) | 2007-06-06 | 2007-06-06 | LCD device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010061687A1 (en) | 2008-11-26 | 2010-06-03 | シャープ株式会社 | Liquid crystal display device, liquid crystal display device drive method, and television receiver |
| EP2369573A4 (en) | 2008-11-26 | 2012-05-09 | Sharp Kk | Liquid crystal display device, liquid crystal display device drive method, and television receiver |
| US8698850B2 (en) | 2008-12-25 | 2014-04-15 | Sharp Kabushiki Kaisha | Display device and method for driving same |
| CN102930844B (en) * | 2012-11-12 | 2016-01-06 | 京东方科技集团股份有限公司 | The control method of display device and data voltage |
| KR102184906B1 (en) | 2014-10-22 | 2020-12-02 | 엘지디스플레이 주식회사 | Display device and controller |
| CN105047156B (en) * | 2015-08-18 | 2017-08-04 | 青岛海信电器股份有限公司 | liquid crystal panel drive method, device and liquid crystal display |
| CN105808011B (en) * | 2016-04-12 | 2018-06-15 | 京东方科技集团股份有限公司 | A kind of display device and its voltage compensating method |
| CN106128399A (en) * | 2016-08-31 | 2016-11-16 | 深圳市华星光电技术有限公司 | For reducing the uneven driving method of liquid crystal display display brightness and device |
| CN107331365B (en) * | 2017-08-30 | 2020-06-05 | 昆山龙腾光电股份有限公司 | Source driver, display device and elimination method of display split screen |
| CN107945764B (en) * | 2018-01-08 | 2020-06-09 | 惠科股份有限公司 | Driving circuit of display panel, display device and driving method of display panel |
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| CN1908741A (en) * | 2005-08-01 | 2007-02-07 | 三星电子株式会社 | Liquid crystal display device and driving method thereof |
| CN1959477A (en) * | 2005-11-04 | 2007-05-09 | 群康科技(深圳)有限公司 | Liquid crystal display, drive circuit, and drive method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1908741A (en) * | 2005-08-01 | 2007-02-07 | 三星电子株式会社 | Liquid crystal display device and driving method thereof |
| CN1959477A (en) * | 2005-11-04 | 2007-05-09 | 群康科技(深圳)有限公司 | Liquid crystal display, drive circuit, and drive method |
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| Title |
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| JP特开2001-42837A 2001.02.16 |
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