CN101520578B - Liquid crystal display device and image display method thereof - Google Patents
Liquid crystal display device and image display method thereof Download PDFInfo
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- CN101520578B CN101520578B CN 200810080655 CN200810080655A CN101520578B CN 101520578 B CN101520578 B CN 101520578B CN 200810080655 CN200810080655 CN 200810080655 CN 200810080655 A CN200810080655 A CN 200810080655A CN 101520578 B CN101520578 B CN 101520578B
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Abstract
The invention discloses a liquid crystal display device which can eliminate margin afterimage, and the device comprises a scanning line, a data line, an auxiliary electrode line, a pixel capacitor, a first switch unit and a second switch unit, wherein the data line is perpendicular to the scanning line, the auxiliary electrode line is parallel to the data line, and the pixel capacitor is arranged near the intersecting point of the scanning line and the data line. The first switch unit is electrically connected with the scanning line, the data line and the pixel capacitor respectively, wherein the first sub-image data is transmitted to the pixel capacitor from the data line through the first switch unit. The second switch unit is electrically connected with the auxiliary electrode line, thescanning line and the pixel capacitor respectively, wherein the second sub-image data is transmitted to the pixel capacitor from the scanning line through the second switch unit. Besides, the inventi on also discloses an image display method of the liquid crystal display device.
Description
Technical field
The invention relates to a kind of liquid crystal indicator and image display method thereof.
Background technology
That liquid crystal indicator has advantages of is lightweight, power consumption reaches low radiation etc. less, therefore replaced the conventional cathode ray tube display device gradually, and be applied in the electronic product of numerous species, for example notebook computer, LCD TV and LCD screen etc.
With regard to liquid crystal indicator, because liquid crystal indicator is to utilize liquid crystal molecule under different ordered states, the characteristic that light is had different polarizations or refraction effect is controlled the amount of penetrating of light, and then makes liquid crystal indicator be produced abundant image.But liquid crystal indicator the situation that smear appears in the unclear or picture of the soft edge of image often can occur when playing dynamic image.This is because the reaction velocity of liquid crystal itself is slower, and because liquid crystal indicator is the light-emitting mode that belongs to lasting pattern (hold-type), therefore, as user during at the dynamic image of watching liquid crystal indicator to play, tend to the integration behavior pattern because of human eye, and make display frame produce the problem of edge image retention (edge blur).
Please refer to Fig. 1, Fig. 1 is the part equivalent circuit diagram of available liquid crystal display device 1.Liquid crystal indicator 1 includes a switch element 16, a liquid crystal capacitance 151, a storage capacitors 152, at least one data line 12, at least one sweep trace 11, a storage electrode line 14 and community electrode line 13.In addition, liquid crystal indicator 1 also includes a data line drive circuit 17 and one scan line drive circuit 18 is mated application.
When scan line drive circuit 18 transmitted a driving voltage to sweep trace 11 and makes switch element 16 conducting, 17 of data line drive circuits saw through data line 12 and transmit an image data to liquid crystal capacitance 151.In addition, storage capacitors 152 is to store a voltage to compensate the leakage current that produces because of switch element 16 in the liquid crystal indicator 1, with the voltage stabilization of maintenance medium crystal device 1.
Hold, the frequency of liquid crystal indicator show image picture normally is 60Hz, and in order to solve the edge image retention problem of liquid crystal indicator, the existing practice is normally inserted a black picture (black image) between adjacent image frame (imageframe).Yet can not experience the flicker of picture in order to make human eye, be responsible for providing the clock frequency of the data line drive circuit of image data to double, that is to say, the image frame time of liquid crystal indicator must be frequency 120Hz by original frequency 60Hz frequency multiplication.The data line drive circuit of this high clock frequency not only is not easy to make, and liquid crystal molecule can occur reverses inadequate problem of time.
In addition, between adjacent image frame, insert a black picture, can make black picture insertion rate (black-inset-ratio) be fixed as 50%, that is to say, liquid crystal indicator has essential demonstration of the time of half to deceive picture, the brightness of liquid crystal indicator is reduced, and black picture insertion rate is 50% to be not the ratio that human eye adapts to most.Therefore, how to provide a kind of liquid crystal indicator that need not frequency multiplication and can improve the edge image retention problem of liquid crystal indicator, real one of the current important topic that belongs to.
Summary of the invention
Because above-mentioned problem, purpose of the present invention is for providing a kind of liquid crystal indicator and the image display method thereof that can eliminate the edge image retention.
For achieving the above object, be to include one scan line, a data line, an auxiliary electrode line, a pixel capacitance, one first switch element and a second switch unit according to a kind of liquid crystal indicator of the present invention.Wherein, data line is parallel to data line perpendicular to sweep trace, auxiliary electrode line, and pixel capacitance is arranged near the intersection point of sweep trace and data line.The first switch element is electrically connected with sweep trace, data line and pixel capacitance respectively, and wherein one first sub-image data are sent to pixel capacitance from data line via the first switch element; The second switch unit is electrically connected with auxiliary electrode line, sweep trace and pixel capacitance respectively, and wherein one second sub-image data from scan line is sent to pixel capacitance via the second switch unit.
For achieving the above object, include one first sweep trace, one second sweep trace, a data line, an auxiliary electrode line, a pixel capacitance, one first switch element and a second switch unit according to another kind of liquid crystal indicator of the present invention.Wherein, the second sweep trace is parallel to the first sweep trace, and data line is perpendicular to the first sweep trace, and auxiliary electrode line is parallel to data line, and pixel capacitance is arranged near the intersection point of the first sweep trace and data line.The first switch element is electrically connected with the first sweep trace, data line and pixel capacitance respectively, and wherein one first sub-image data are to be sent to pixel capacitance from data line via the first switch element.The second switch unit is electrically connected with auxiliary electrode line, the second sweep trace and pixel capacitance respectively, and wherein one second image data is to be sent to pixel capacitance from the second sweep trace via the second switch unit.
In addition, for achieving the above object, according to the image display method of a kind of liquid crystal indicator of the present invention, it is to be executed in the image frame time, and wherein the image frame time is to divide into one first sub-image image time and one second sub-image image time.Image display method is to comprise the following steps: to transmit one first sub-image data to a pixel capacitance in the first sub-image image time via one first switch element; And transmit one second sub-image data to pixel capacitance in the second sub-image image time via a second switch unit.
From the above, because complying with a kind of liquid crystal indicator of the present invention and image display method thereof, write black picture data by the second switch unit, do not improve only the problem of edge image retention, but more can make data line drive circuit need not just inserting black picture of frequency multiplication, therefore can reduce the cost of liquid crystal indicator, and can adjust the displaying time ratio between image data and the black picture data.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is a schematic diagram of available liquid crystal display device;
Fig. 2 is a part of schematic equivalent circuit according to preferred embodiment liquid crystal indicator of the present invention;
Fig. 3 A is the sweep trace voltage sequential chart according to preferred embodiment liquid crystal indicator of the present invention;
Fig. 3 B is the storage electrode line voltage sequential chart according to preferred embodiment liquid crystal indicator of the present invention;
Fig. 3 C is the voltage sequential chart according to the pixel capacitance node of preferred embodiment liquid crystal indicator of the present invention;
Fig. 4 is a part of schematic equivalent circuit according to another preferred embodiment liquid crystal indicator of the present invention;
Fig. 5 A is the sweep trace voltage sequential chart according to another preferred embodiment liquid crystal indicator of the present invention;
Fig. 5 B is the auxiliary electrode line voltage sequential chart according to another preferred embodiment liquid crystal indicator of the present invention;
Fig. 5 C is the voltage sequential chart according to the pixel capacitance node of another preferred embodiment liquid crystal indicator of the present invention;
Fig. 6 is a part of schematic equivalent circuit according to the another preferred embodiment liquid crystal indicator of the present invention;
Fig. 7 A is the first sweep trace voltage sequential chart according to the another preferred embodiment liquid crystal indicator of the present invention;
Fig. 7 B is the second sweep trace voltage sequential chart according to the another preferred embodiment liquid crystal indicator of the present invention;
Fig. 7 C is the auxiliary electrode line voltage sequential chart according to the another preferred embodiment liquid crystal indicator of the present invention;
Fig. 7 D is the voltage sequential chart according to the pixel capacitance node of the another preferred embodiment liquid crystal indicator of the present invention; And
Fig. 8 is the process flow diagram according to the image display method of preferred embodiment liquid crystal indicator of the present invention.
The component symbol explanation:
1,2,3,4: liquid crystal indicator
11,21,31: sweep trace
17: data line drive circuit
18: scan line drive circuit
41: the first sweep traces
12,22,32,43: data line
42: the second sweep traces
13,23,33,44: common electrode lines
14,24,34,45: the storage electrode line
38,46: auxiliary electrode line
25,35,47: pixel capacitance
151,251,351,471: liquid crystal capacitance
152,252,352,472: storage capacitors
16: switch element
161: grid
162: source electrode
163: drain electrode
26,36,48: the first switch elements
261,361,481: first grid
262,362,482: the first source electrodes
263,363, drain electrode in 483: the first
27,37,49: the second switch unit
271,371,491: second grid
272,372,492: the second source electrodes
273,373, drain electrode in 493: the second
V
a, V
b, V
c: pixel voltage
S01～S02: image display step
f
t: pressure drop
t
0～t
f, t
0'～t
f', t
0"～t
f": the image frame time
t
0～t
1f, t
0'～t
1f', t
0"～t
1f": the first sub-image image time
t
1f～t
f, t
1f'～t
f', t
1f"～t
f": the second sub-image image time
Embodiment
Hereinafter with reference to relevant drawings, liquid crystal indicator and image display method thereof according to preferred embodiment of the present invention are described.Please refer to shown in Figure 2ly, Fig. 2 is a part of schematic equivalent circuit according to preferred embodiment liquid crystal indicator 2 of the present invention.Liquid crystal indicator 2 includes one scan line 21, a data line 22, community electrode line 23, a storage electrode line 24, a pixel capacitance 25, one first switch element 26 and a second switch unit 27.
In the present embodiment, liquid crystal indicator 2 also includes a data line drive circuit and one scan line drive circuit (figure does not show).Wherein, data line drive circuit is with data line 22 electric connections and provides one first sub-image data to pixel capacitance 25.Scan line drive circuit is with sweep trace 21 electric connections and can provides one second sub-image data to pixel capacitance 25.Wherein, the second sub-image data are to be a black picture data.In the liquid crystal indicator of normal dark attitude (normally black), the magnitude of voltage of the second sub-image data approximates the magnitude of voltage of a common voltage; In the liquid crystal indicator of normal bright attitude (normally white), the magnitude of voltage of the second sub-image data approximates the magnitude of voltage of dark attitude.
Then, the first switch element 26 is to be electrically connected with sweep trace 21, data line 22 and pixel capacitance 25 respectively.Second switch unit 27 is to be electrically connected with sweep trace 21, storage electrode line 24 and pixel capacitance 25 respectively.
In the present embodiment, the first switch element 26 and second switch unit 27 for example are but are not limited to a thin film transistor (TFT).Therefore, the first switch element 26 is to have a first grid 261, one first source electrode 262 and one first drain electrode 263.Wherein first grid 261 is to be electrically connected with sweep trace 21; The first source electrode 262 is to be electrically connected with data line 22; The first drain electrode 263 is to be electrically connected with pixel capacitance 25.Second switch unit 27 is to have a second grid 271, one second source electrode 272 and one second drain electrode 273.Wherein second grid 271 is electrically connected with storage electrode line 24; The second source electrode 272 is electrically connected with sweep trace 21; The second drain electrode 273 is electrically connected with pixel capacitance 25 and the first drain electrode 263.
In the present embodiment, common electrode lines 23 transmits common voltage, and storage electrode line 24 can transmit a stored voltage or boosting voltage, and stored voltage also can equal common voltage.
Please be simultaneously with reference to shown in Fig. 3 A to Fig. 3 C, at an image frame time t
0～t
fBetween (as shown in Figure 3A), wherein image frame time t
0～t
fTo divide into one first sub-image image time t
0～t
1fAnd one second sub-image image time t
1f～t
f(shown in Fig. 3 B), and the image frame time be the image frame time for frequency 60Hz.
Below, please also refer to shown in Fig. 2 and Fig. 3 A to Fig. 3 C, the action of liquid crystal indicator 2 is as follows: at the first sub-image image time t
0～t
1fBetween t
0～t
1, scan line drive circuit provides a driving voltage (as shown in Figure 3A), and makes 26 conductings of the first switch element via sweep trace 21.Simultaneously, data line drive circuit provides one first sub-image data to data line 22, and is sent to pixel capacitance 25 via the first switch element 26.Then, in the first sub-image image time t
0～t
1fT
1～t
1fBetween, scan line drive circuit is kept an appropriate voltage to close the first switch element 26 (as shown in Figure 3A), and at this moment, the first sub-image data that pixel capacitance 25 stores will make liquid crystal molecule reverse and the effect of the backlight of arranging in pairs or groups and then produce image.And at the first sub-image image time t
0～t
1fBetween, storage electrode line 24 is kept a stored voltage (shown in Fig. 3 B).
In addition, a pixel voltage V of pixel capacitance 25
aVariation (shown in Fig. 3 C), be in the first switch element 26 close after (namely at t
1Afterwards) a voltage drop f is arranged
t, this is because have a stray capacitance between the first grid 261 of the first switch element 26 and the first drain electrode 263, therefore when the first switch element 26 is closed, can because the effect of stray capacitance so that V
aAlso descend a little thereupon.
Then, in the second sub-image image time t
1f～t
f, storage electrode line 24 transmits a boosting voltage to second switch unit 27 (shown in Fig. 3 B), makes 27 conductings of second switch unit.And in the second sub-image image time t
1f～t
fT
1f～t
2Between, scan line drive circuit provides one second sub-image data to sweep trace 21, wherein, and in the liquid crystal indicator of normal dark attitude, the magnitude of voltage of the second sub-image data approximates common voltage (as shown in Figure 3A), and is sent to pixel capacitance 25 via second switch unit 27.In addition, at the second sub-image image time t
1f～t
fBetween, because keeping the reference voltage of an end of storage capacitors 252, can store the second sub-image data, therefore, storage electrode line 24 need continue to provide boosting voltage (shown in Fig. 3 B), make second switch unit 27 keep conducting state in this section period, and scan line drive circuit continues to provide the second sub-image data (black picture data) to pixel capacitance 25, so just can avoid the voltage of pixel capacitance 25 because a terminal voltage of storage capacitors 252 changes and is changed.
In sum, in the first sub-image image time t
0To t
1fBetween, liquid crystal indicator 2 is starts of collocation backlight module and show normal pictures, and at the second sub-image image time t
1fTo t
fBetween, liquid crystal indicator 2 be the collocation backlight module start and show black picture.In addition, liquid crystal indicator 2 length that can cooperate the frequency of the black picture that wish inserts to adjust the first sub-image image time and the second sub-image image time is finished in the time in the image frame of frequency 60Hz.
From the above, at image frame time t
fAfterwards, repeat again image frame time t
0To t
fStart, but the person of should be noted, in next image time, liquid crystal indicator 2 can adopt a reverse voltage with respect to common voltage to drive (shown in Fig. 3 C).
Then, please refer to shown in Figure 4ly, Fig. 4 is a part of schematic equivalent circuit according to the liquid crystal indicator 3 of another preferred embodiment of the present invention.Liquid crystal indicator 3 includes one scan line 31, a data line 32, community electrode line 33, a storage electrode line 34, an auxiliary electrode line 38, a pixel capacitance 35, one first switch element 36 and a second switch unit 37.
In the present embodiment, liquid crystal indicator 3 also includes a data line drive circuit and one scan line drive circuit (figure does not show).Wherein, data line drive circuit is identical with the liquid crystal indicator 2 of above-described embodiment with action and the function of scan line drive circuit, therefore do not repeat them here.In addition, pixel capacitance 35 is all identical with annexation and the function of the pixel capacitance 25 of above-described embodiment, therefore also repeat no more at this.
Then, the first switch element 36 is electrically connected with sweep trace 31, data line 32 and pixel capacitance 35 respectively.Second switch unit 37 is electrically connected with sweep trace 31, auxiliary electrode line 38 and pixel capacitance 35 respectively.
In the present embodiment, the first switch element 36 and second switch unit 37 for example are but are not limited to a thin film transistor (TFT).Wherein, the annexation of the first switch element 36 is identical with first switch element 26 of above-described embodiment, therefore do not repeat them here.Be noted that in this second switch unit 37 is to have a second grid 371, one second source electrode 372 and one second drain electrode 373.Wherein second grid 371 is electrically connected with auxiliary electrode line 38; The second source electrode 372 is electrically connected with sweep trace 31; The second drain electrode 373 is electrically connected with pixel capacitance 35 and the first drain electrode 363.
In the present embodiment, common electrode lines 33 and storage electrode line 34 are to transmit respectively or jointly a common voltage, and auxiliary electrode line 38 is to transmit a boosting voltage.Certainly, according to different designs, common electrode lines 33 can transmit a common voltage, and storage electrode line 34 can transmit a stored voltage.
Please be simultaneously with reference to shown in Fig. 5 A to Fig. 5 C, an image frame time t
0'～t
f' divide into one first sub-image image time t
0'～t
1f' (shown in Fig. 5 A) and one second sub-image image time t
1f'～t
f' (shown in Fig. 5 B), and image frame time t
0'～t
f' be the image frame time for frequency 60Hz.
Below, please also refer to shown in Fig. 4 and Fig. 5 A to Fig. 5 C, the start of liquid crystal indicator 3 is as follows: at the first sub-image image time t
0'～t
1f' between, the action of liquid crystal indicator 3 is identical with the liquid crystal indicator of above-described embodiment 2, therefore repeats no more.Then, in the second sub-image image time t
1f'～t
f' t
1f'～t
2' between, auxiliary electrode line 38 transmits a boosting voltage to second switch unit 37 (shown in Fig. 5 B), so that 37 conductings of second switch unit, simultaneously, scan line drive circuit provides one second sub-image data to sweep trace 31, and is sent to pixel capacitance 35 via second switch unit 37.Then, in the second sub-image image time t
1f'～t
2' t
2'～t
f' between, the second sub-image data that pixel capacitance 35 stores (black picture data) liquid crystal molecule will be reversed and the work of the backlight of arranging in pairs or groups in order to produce black picture.In addition, since the action of auxiliary electrode line 38 and sweep trace 31, a pixel voltage V of pixel capacitance 35
bVariation shown in Fig. 5 C.
In sum, in the first sub-image image time t
0' to t
1f' between, liquid crystal indicator 3 is starts of collocation backlight module and show normal pictures, and at the second sub-image image time t
1f' to t
f' between, liquid crystal indicator 3 is collocation backlight module starts and show black picture.In addition, liquid crystal indicator 3 length that can cooperate the frequency of the black picture that wish inserts to adjust the first sub-image image time and the second sub-image image time is finished in the time in the image frame of frequency 60Hz.
From the above at image frame time t
f' afterwards, repeat again image frame time t
0' to t
f' action, but the person of should be noted, in next image time, liquid crystal indicator 3 is to adopt a reverse voltage with respect to common voltage to drive (shown in Fig. 5 C).
Please refer to shown in Figure 6ly, Fig. 6 is a part of schematic equivalent circuit according to the liquid crystal indicator 4 of the another preferred embodiment of the present invention.Liquid crystal indicator 4 is to include one first sweep trace 41, one second sweep trace 42, a data line 43, community electrode line 44, a storage electrode line 45, an auxiliary electrode line 46, a pixel capacitance 47, one first switch element 48 and a second switch unit 49.
In the present embodiment, liquid crystal indicator 4 also includes a data line drive circuit and one scan line drive circuit (figure does not show).Wherein, data line drive circuit is identical with the liquid crystal indicator 2 of above-described embodiment with action and the function of scan line drive circuit, therefore do not repeat them here.In addition, pixel capacitance 47 is all identical with annexation and the function of the pixel capacitance 25 of above-described embodiment, therefore also repeat no more at this.
Then, the first switch element 48 is electrically connected with the first sweep trace 41, data line 43 and pixel capacitance 47 respectively.And second switch unit 49 is electrically connected with the second sweep trace 42, auxiliary electrode line 46 and pixel capacitance 47 respectively.
In the present embodiment, the first switch element 48 and second switch unit 49 for example are but are not limited to a thin film transistor (TFT).Because the first switch element 48 is identical with the annexation of first switch element 26 of above-described embodiment, therefore do not repeat them here.Be noted that in this second switch unit 49 has a second grid 491, one second source electrode 492 and one second drain electrode 493.Wherein, second grid 491 is electrically connected with auxiliary electrode line 46; The second source electrode 492 and the second sweep trace 42 are electrically connected; The second drain electrode 493 is electrically connected with pixel capacitance 47 and the first drain electrode 483.
In the present embodiment, common electrode lines 44 and storage electrode line 45 are to transmit respectively or jointly a common voltage, and auxiliary electrode line 46 is to transmit a boosting voltage.Certainly, according to different designs, common electrode lines 44 can transmit a common voltage, and storage electrode line 45 can transmit a stored voltage.
Please be simultaneously with reference to shown in Fig. 7 A to Fig. 7 D, an image frame time t
0"～t
f" divide into one first sub-image image time t
1"～t
1f" (shown in Fig. 7 A) and one second sub-image image time t
1f"～t
f" (shown in Fig. 7 B and Fig. 7 C), and the image frame time be the image frame time for frequency 60Hz.
Below, please also refer to shown in Fig. 6 and Fig. 7 A to Fig. 7 D, the action of liquid crystal indicator 4 is as follows: at the first sub-image image time t
0"～t
1f" between, the action of liquid crystal indicator 4 is identical with the liquid crystal indicator of above-described embodiment 2, therefore repeats no more.Then, in the second sub-image image time t
1f"～t
f" t
1f"～t
2" between, auxiliary electrode line 46 transmits a boosting voltage to second switch unit 49, so that second switch unit 49 conductings (shown in Fig. 7 C).Simultaneously, the second sweep trace 42 provides one second sub-image data (black picture data) to second switch unit 49, and is sent to pixel capacitance 47 (shown in Fig. 7 B).Then at the second sub-image image time t
1f"～t
f" t
2"～t
f" between, the second sub-image data that pixel capacitance 47 stores (black picture data) liquid crystal molecule will be reversed and the work of the backlight of arranging in pairs or groups in order to produce black picture.In addition, because the action of auxiliary electrode line 46, the first sweep trace 41 and the second sweep trace 42, so that a pixel voltage V of pixel capacitance 47
cVariation shown in Fig. 7 D.
In sum, in the first sub-image image time t
0" to t
1f" between, liquid crystal indicator 4 is starts of collocation backlight module and show normal pictures, and at image frame time t
1f" to t
f" between, liquid crystal indicator 4 be the collocation backlight module start and show black picture.In addition, liquid crystal indicator 4 length that can cooperate the frequency of the black picture that wish inserts to adjust the first sub-image image time and the second sub-image image time is finished in the time in the image frame of frequency 60Hz.And because cooperatively interacting, the first sub-image image time and the second sub-image image time can between two image datas, insert a black picture, therefore the data-driven circuit need not frequency multiplication.
Subsidiary one carries, and in each image time, the black picture data that each sweep trace provides provides the pixel capacitance to upper level, makes the shown image of liquid crystal indicator have the interlock effect.
In like manner, at image frame time t
f" afterwards, repeat again image frame time t
0" to t
f" start, but the person of should be noted, in next image time, liquid crystal indicator 4 is reverse voltage drivings (shown in Fig. 7 D) of adopting a relative common electric voltage.
Then, please refer to shown in Figure 8ly, it is the process flow diagram for the image display method of a kind of liquid crystal indicator of preferred embodiment of the present invention, and it comprises that step S01 is to step S02.The person of should be noted, the image display method of the liquid crystal indicator of preferred embodiment of the present invention is to can be applicable to above-mentioned liquid crystal indicator 2,3 or 4.Below be example by liquid crystal indicator 2, the process step of image display method is described.
Wherein image display method is to be executed in an image frame time t
0～t
f, the image frame time is to divide into one first sub-image image time t
0～t
1fAnd one second sub-image image time t
1f～t
f
In step S01, at the first sub-image image time t
0～t
1f, transmit one first sub-image data to pixel capacitance 25 via the first switch element 26.
In step S02, at the second sub-image image time t
1f～t
fTransmit one second sub-image data to pixel capacitance 25 via second switch unit 27.
Above step S01 has been exposed among the embodiment of foregoing liquid crystal display device, therefore repeat no more in this all to feature and the details of step S02.
In sum, because complying with a kind of liquid crystal indicator of the present invention, to come inserting black picture by the second switch element, can improve the problem of edge image retention, but more can make data line drive circuit need not just inserting black picture of frequency multiplication, in addition, more can cooperate human eye to view and admire required, adjust the display frequency of black picture, allow the user can experience better image.Therefore can reduce the cost of liquid crystal indicator, improve the display frame of liquid crystal indicator, more can make display frame more perfect.
The above only is illustrative, but not is restricted.Anyly do not break away from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be contained in claims of the present invention.
Claims (14)
1. liquid crystal indicator, it comprises:
The one scan line drive circuit;
The one scan line;
One data line is perpendicular to this sweep trace;
One auxiliary electrode line is perpendicular to this data line;
One pixel capacitance is arranged near the intersection point of this sweep trace and this data line;
One first switch element is electrically connected with this sweep trace, this data line and this pixel capacitance respectively, and wherein one first sub-image data are to be sent to this pixel capacitance from this data line via this first switch element; And
One second switch unit, be electrically connected with this auxiliary electrode line, this pixel capacitance of this sweep trace respectively, wherein one second sub-image data are to be sent to this pixel capacitance from this sweep trace via this second switch unit, and wherein these the second sub-image data are black picture datas;
Wherein, when liquid crystal indicator was a normal dark attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates a common voltage;
Wherein, when liquid crystal indicator was a normal bright attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates dark attitude.
2. liquid crystal indicator as claimed in claim 1 is characterized in that, this sweep trace is sequentially to transmit a driving voltage to control this first switch element and this second sub-image data in this pixel capacitance.
3. liquid crystal indicator as claimed in claim 1, it is characterized in that, this first switch element is to be a first film transistor, have a first grid, one first drain electrode and one first source electrode, this first grid is to be electrically connected with this sweep trace, this first source electrode is to be electrically connected with this data line, and this first drain electrode is to be electrically connected with this pixel capacitance; And
This second switch unit is to be one second thin film transistor (TFT), have a second grid, one second drain electrode and one second source electrode, this second grid is to be electrically connected with this auxiliary electrode line, and this second source electrode is to be electrically connected with this sweep trace, and this second drain electrode is to be electrically connected with this pixel capacitance.
4. liquid crystal indicator as claimed in claim 3 is characterized in that, this auxiliary electrode line is to transmit a boosting voltage, to control this second switch unit.
5. liquid crystal indicator as claimed in claim 3 is characterized in that, this pixel capacitance comprises:
One liquid crystal capacitance, it is electrically connected with this first switch element, this second switch unit and community electrode line respectively; And
One storage capacitors, it is electrically connected with this first switch element, this second switch unit and a storage electrode line respectively.
6. liquid crystal indicator as claimed in claim 5 is characterized in that, this storage electrode line is and this auxiliary electrode line is electrically connected, and sequentially transmit a stored voltage in this storage capacitors and this boosting voltage to control this second switch unit.
7. liquid crystal indicator, it comprises:
The one scan line drive circuit;
One first sweep trace;
One second sweep trace is parallel to this first sweep trace;
One data line is perpendicular to this first sweep trace;
One auxiliary electrode line is perpendicular to this data line;
One pixel capacitance is arranged near the intersection point of this first sweep trace and this data line;
One first switch element is electrically connected with this first sweep trace, this data line and this pixel capacitance respectively, and wherein one first sub-image data are to be sent to this pixel capacitance from this data line via this first switch element; And
One second switch unit, be electrically connected with this auxiliary electrode line, this second sweep trace and this pixel capacitance respectively, wherein one second sub-image data are to be sent to this pixel capacitance from this second sweep trace via this second switch unit, and wherein these the second sub-image data are black picture datas;
Wherein, when liquid crystal indicator was a normal dark attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates a common voltage;
Wherein, when liquid crystal indicator was a normal bright attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates dark attitude.
8. liquid crystal indicator as claimed in claim 7, it is characterized in that, this first switch element is to be a first film transistor, have a first grid, one first drain electrode and one first source electrode, this first grid is to be electrically connected with this first sweep trace, this first source electrode is to be electrically connected with this data line, and this first drain electrode is to be electrically connected with this pixel capacitance; And
This second switch unit is to be one second thin film transistor (TFT), have a second grid, one second drain electrode and one second source electrode, this second grid is to be electrically connected with this auxiliary electrode line, and this second source electrode is to be electrically connected with this second sweep trace, and this second drain electrode is to be electrically connected with this pixel capacitance.
9. liquid crystal indicator as claimed in claim 8 is characterized in that, this auxiliary electrode line is to transmit a boosting voltage, to control this second switch unit.
10. liquid crystal indicator as claimed in claim 8 is characterized in that, this pixel capacitance comprises:
One liquid crystal capacitance, it is to be electrically connected with this first switch element, this second switch unit and community electrode line respectively; And
One storage capacitors, it is to be electrically connected with this first switch element, this second switch unit and a storage electrode line respectively.
11. liquid crystal indicator as claimed in claim 10 is characterized in that, this storage electrode line is and this auxiliary electrode line is electrically connected, and sequentially transmit a stored voltage in this storage capacitors and this boosting voltage to control this second switch unit.
12. the image display method of a liquid crystal indicator is to be executed in the image frame time, the image frame time is to divide into one first sub-image image time and one second sub-image image time, and this image display method comprises:
Transmit one first sub-image data to a pixel capacitance in this first sub-image image time via one first switch element; And
Transmit one second sub-image data to this pixel capacitance in this second sub-image image time via a second switch unit,
These the second sub-image data are to be provided by the one scan line drive circuit, and these the second sub-image data are black picture datas,
Wherein, when liquid crystal indicator was a normal dark attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates a common voltage;
Wherein, when liquid crystal indicator was a normal bright attitude liquid crystal indicator, the magnitude of voltage that this scan line drive circuit switches these the second sub-image data was the magnitude of voltage that approximates dark attitude.
13. image display method as claimed in claim 12 is characterized in that, when this first switch element was conducting, this second switch unit was for closing.
14. image display method as claimed in claim 12 is characterized in that,
This first sub-image image time is not equal to this second sub-image image time.
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| TWI409557B (en) * | 2009-07-17 | 2013-09-21 | Chunghwa Picture Tubes Ltd | Pixel structure |
| CN101692146B (en) * | 2009-09-10 | 2011-09-14 | 福建华映显示科技有限公司 | Pixel structure |
| US8665264B2 (en) | 2011-11-23 | 2014-03-04 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | LCD panel and LCD device |
| CN102411241B (en) * | 2011-11-23 | 2014-06-18 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN110928086B (en) * | 2019-11-29 | 2022-05-17 | 上海中航光电子有限公司 | Display panel, driving method thereof and display device |
| CN113066436A (en) * | 2021-03-26 | 2021-07-02 | 深圳市华星光电半导体显示技术有限公司 | Display panel, control method thereof and display device |
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| CN1892787A (en) * | 2005-06-30 | 2007-01-10 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method for driving same |
| CN1296884C (en) * | 2003-02-18 | 2007-01-24 | 友达光电股份有限公司 | Method for reducing power loss of LCD panel in stand by mode |
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| CN1892787A (en) * | 2005-06-30 | 2007-01-10 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and method for driving same |
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