CN101482680B - Electro-optical device, method of driving electro-optical device, and electronic apparatus - Google Patents
Electro-optical device, method of driving electro-optical device, and electronic apparatus Download PDFInfo
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- CN101482680B CN101482680B CN2009100064106A CN200910006410A CN101482680B CN 101482680 B CN101482680 B CN 101482680B CN 2009100064106 A CN2009100064106 A CN 2009100064106A CN 200910006410 A CN200910006410 A CN 200910006410A CN 101482680 B CN101482680 B CN 101482680B
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Abstract
The invention provides an electro-optical device (1A), comprising a first substrate having a plurality of scanning lines (110), a plurality of data lines (120), a plurality of common lines (130) and a plurality of pixel circuits (150); and a second substrate; the pixel circuits (150) have the pixel electrodes (155), the memory capacitors (153) and switch elements (151). The second substrate has the common electrodes (156) connected to the common lines (130). The electro-optical device (1A) has a common driving circuit (103A) supplying the driving signal to the first potential and the second potential to the common lines (130); a data line driving circuit (102) supplying the image signals to the data lines (120); and a scanning line driving circuit (101) for controlling the control signal of the scanning lines (110), balancing the data lines and the common lines.
Description
The application is to be that June 1, application number in 2006 are that 200610088527.X, denomination of invention are the dividing an application of application of electro-optical device, its driving method and electronic equipment the applying date.
Technical field
The present invention relates to electro-optical device, method of driving electro-optical device and electronic equipment.
Background technology
In the past, being used for image is carried out the electro-optical devices such as liquid crystal indicator of liquid crystal display, has been well-known.This electro-optical device for example is following structure.
Figure 11 is the present invention's planimetric map of the related electro-optical device 1 of example in the past.
Electro-optical device 1 possesses liquid crystal panel AA, scan line drive circuit 101, data line drive circuit 102 and bridging line driving circuit 103.
Liquid crystal panel AA comprises: device substrate 100, and its thin film transistor (TFT) as on-off element (below, be called TFT) 151 is configured to rectangular; The subtend substrate is with this device substrate 100 subtends configuration; And liquid crystal, be arranged between device substrate 100 and the subtend substrate.
Above-mentioned scan line drive circuit 101 and data line drive circuit 102 are formed on the device substrate 100 of liquid crystal panel AA.
On device substrate 100, form: many sweep traces 110 are provided with every predetermined space; Many data lines 120 with these sweep traces 110 quadrature roughly, and are provided with every predetermined space; And many bridging lines 130 and many sweep trace 110 almost parallels and be arranged alternately.
Cross part office at each sweep trace 110 and each data line 120 is provided with image element circuit 150.This image element circuit 150 also comprises except that above-mentioned TFT151: pixel electrode 155; With memory capacitance 153, the one end is connected in this pixel electrode 155 and the other end is connected with bridging line 130.
On the grid of TFT151, connect sweep trace 110, on the source of TFT151, connect data line 120, in the leakage of TFT151, connect pixel electrode 155 and memory capacitance 153.Thereby this TFT151 makes data line 120 be connected disconnection with pixel electrode 155 and memory capacitance 153 according to the control signal from sweep trace 110.
The subtend substrate has the common electrode 156 with pixel electrode 155 subtends.This common electrode 156 by being arranged at 100 4 jiaos of device substrates subtend conducting portion 105 and be used for connecting shared wiring 106 between these subtend conducting portions 105, be connected with bridging line 130.
Bridging line driving circuit 103 is used for the drive signal of the 1st current potential or 2nd current potential higher than the 1st current potential is supplied with bridging line 130.
When data line drive circuit 102 is the 1st current potential at the current potential of common electrode 156, with the current potential higher data line 120 is supplied with picture signal than the 1st current potential, when the current potential of common electrode 156 is the 2nd current potential, data line 120 is supplied with picture signal with the current potential lower than the 2nd current potential.
Scan line drive circuit 101 is used for sweep trace 110 is supplied with the control signal that makes TFT151 carry out conducting, end.
Above electro-optical device 1 current potential that makes common electrode 156 by bridging line driving circuit 103 carry out anti-phase (below, be called shared anti-phase driving) between high the 2nd current potential at the 1st current potential and than the 1st current potential.When the current potential of common electrode 156 is the 1st current potential, by data line drive circuit 102 with than the high current potential of the 1st current potential to data line 120 supply with picture signals (below, being called positive polarity writes), when the current potential of common electrode 156 is the 2nd current potential, data line 120 is supplied with picture signals (below, be called negative polarity and write) than the low current potential of the 2nd current potential.
Figure 12 is that the positive polarity of the related electro-optical device 1 of example is in the past write fashionable sequential chart.Figure 13 is that the negative polarity of the related electro-optical device 1 of example is in the past write fashionable sequential chart.Figure 12 and Figure 13 represent the situation that writes with identical gray shade scale.In addition, in Figure 12,13, VCOM is the current potential of common electrode 156, and SOURCE is the current potential of data line 120, and GATE is the current potential of sweep trace 110, and PIX is the current potential of pixel electrode 155.
In positive polarity writes, as shown in figure 12, at first make the current potential VCOM of common electrode 156 become the 1st current potential VCL, and supply with the control signal that the current potential GATE that makes sweep trace 110 becomes current potential VGH, make TFT151 become conducting state from scan line drive circuit 101 by bridging line driving circuit 103.
Then, at moment t1, supply with picture signals by data line drive circuit 102, the current potential SOURCE of data line 120 is raise from current potential VP1 is current potential VP5, and by TFT151 it is write pixel electrode 155 and memory capacitance 153.
Then, at moment t2, make TFT151 become cut-off state by scan line drive circuit 101.Whereby, the potential difference (PD) between the 1st current potential VCL of common electrode 156 and the current potential VP5 that pixel electrode 155 is write is applied in to liquid crystal, is kept by memory capacitance 153.
Then, at moment t3, the current potential VCOM of common electrode 156 is elevated to the 2nd current potential VCH from the 1st current potential VCL by bridging line driving circuit 103.So the potential difference (PD) between the current potential VCOM of the current potential PIX of pixel electrode 155 itself and common electrode 156 will rise to current potential VP2 by original state and common electrode 156 together.At this moment, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect, because produce capacitive coupling, so the current potential SOURCE of data line 120 will rise to the current potential VP2 identical with the current potential PIX of pixel electrode 155 with bridging line 130.
Below, in negative polarity writes, as shown in figure 13, at first make the current potential VCOM of common electrode 156 become the 2nd current potential VCH by bridging line driving circuit 103, and supply with the control signal that the current potential GATE that makes sweep trace 110 becomes current potential VGH from scan line drive circuit 101, make TFT151 become conducting state.
Then,, supply with picture signal, make the current potential SOURCE of data line 120 be reduced to current potential VP6, and it is write pixel electrode 155 and memory capacitance 153 by TFT151 from current potential VP2 by data line drive circuit 102 at moment t5.
Then, at moment t6, make TFT151 become cut-off state by scan line drive circuit 101.Whereby, the potential difference (PD) between the 2nd current potential VCH of common electrode 156 and the current potential VP6 that pixel electrode 155 is write is applied in to liquid crystal, is kept by memory capacitance 153.
Then, at moment t7, the current potential VCOM of common electrode 156 is reduced to the 1st current potential VCL from the 2nd current potential VCH by bridging line driving circuit 103.So the potential difference (PD) between the current potential VCOM of the current potential PIX of pixel electrode 155 itself and common electrode 156 will drop to current potential VP1 by original state and common electrode 156 together.At this moment, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect, because produce capacitive coupling, so the current potential SOURCE of data line 120 will drop to the current potential VP1 identical with the current potential PIX of pixel electrode 155 with bridging line 130.
According to this electro-optical device 1, has the such effect of liquid crystal panel image retention that can prevent liquid crystal panel AA.
; for above-mentioned electro-optical device 1 in the past and since with the current potential SOURCE of data line 120 when current potential VP1 raises to current potential VP5, and with the current potential SOURCE of data line 120 when current potential VP2 is reduced to current potential VP6; want consumed power, thereby power consumption increases.In addition, the time that picture signal is write pixel electrode 155 also increases.
Moreover, because write fashionable when carrying out positive polarity, in data line 120 and bridging line 130, produce capacitive coupling, so if make the current potential VCOM of common electrode 156 rise to the 2nd current potential VCH from the 1st current potential VCL, then the current potential SOURCE of data line 120 rises to the current potential VP2 identical with the current potential PIX of pixel electrode 155.In addition, because write fashionable when carrying out negative polarity, in data line 120 and bridging line 130, produce capacitive coupling, so if the current potential VCOM of common electrode 156 drops to the 1st current potential VCL from the 2nd current potential VCH, then the current potential SOURCE of data line 120 drops to the current potential VP1 identical with the current potential PIX of pixel electrode 155.Thereby, there is the danger of applying excessive voltage, damage data line drive circuit 102 for data line drive circuit 102.
At top problem, people have proposed to possess the electro-optical device of following pre-charge circuit, and this pre-charge circuit has bigger electric capacity (for example, referring to patent documentation 1).In addition, also proposed to possess the electro-optical device of following pre-charge circuit, this pre-charge circuit is used for data line is supplied with driving voltage (for example, referring to patent documentation 2).
According to the electro-optical device that possesses pre-charge circuit shown in the patent documentation 1, in positive polarity writes during the current potential of rising common electrode, by between the big electric capacity of pre-charge circuit and data line, charge generation being moved, prevent that the current potential of data line from rising to the current potential identical with pixel electrode.In addition, when in negative polarity writes, reducing the current potential of common electrode,, prevent that the current potential of data line from dropping to the current potential identical with pixel electrode by between the big electric capacity of pre-charge circuit and data line, charge generation being moved.
Thereby, need not supply with driving voltage to data line, the current potential that just can suppress data line rises or descends, therefore can reduce power consumption.In addition, can also prevent the damage data line drive circuit.
In addition, according to the patent documentation 2 described electro-optical devices that possess pre-charge circuit, in positive polarity writes before the current potential of rising common electrode, supply with driving voltage and the current potential of data line is elevated to the current potential identical with common electrode from pre-charge circuit in advance.In addition, in negative polarity writes, reduce before the current potential of common electrode, supply with driving voltage and the current potential of data line is reduced to the current potential identical with common electrode from pre-charge circuit in advance.
Thereby, by supplying with driving voltage, just can reduce to write the potential difference (PD) of the front and back of picture signal, so can shorten the time that picture signal is write pixel electrode.
Patent documentation 1: the spy opens the 2004-354758 communique
Patent documentation 2: the spy opens the 2004-191536 communique
, be mounted with in recent years electro-optical device portable equipments such as pocket telephone popularize comparatively obviously, and, follow the power consumption increase of multifunction, high performance but to become problem for this electro-optical device.For this reason, people require a kind of electro-optical device that can reduce power consumption.But, with regard to the electro-optical device shown in the above-mentioned patent documentation 1, can not think fully to have adapted to this requirement.In addition, with regard to the electro-optical device shown in the patent documentation 2, write fashionable power consumption, because in pre-charge circuit, want consumed power, so in general be difficult to reduce power consumption though can suppress data line.
Summary of the invention
The present invention makes in view of above-mentioned condition, and its purpose is, a kind of electro-optical device, method of driving electro-optical device and electronic equipment that can reduce power consumption be provided.
In order to address the above problem, the invention provides following electro-optical device, method of driving electro-optical device and electronic equipment.
Electro-optical device of the present invention possesses: the 1st substrate, its have many sweep traces, with these sweep traces roughly quadrature many data lines, with above-mentioned sweep trace almost parallel and many bridging lines that are arranged alternately and corresponding to the set a plurality of image element circuits of the infall of above-mentioned sweep trace and above-mentioned data line; The 2nd substrate is provided with the 1st substrate subtend; And electro-optical substance, be arranged between above-mentioned the 1st substrate and above-mentioned the 2nd substrate; Above-mentioned image element circuit has: pixel electrode; Memory capacitance, an end are connected in this pixel electrode and the other end is connected with above-mentioned bridging line; And on-off element, be used for according to control signal from above-mentioned sweep trace, make above-mentioned data line be connected disconnection with pixel electrodes and above-mentioned memory capacitance; Above-mentioned the 2nd substrate has the common electrode that is connected with above-mentioned bridging line; Electro-optical device has: the bridging line driving circuit is used for the drive signal of the 1st current potential or 2nd current potential higher than the 1st current potential is supplied with above-mentioned bridging line; Data line drive circuit, be used for current potential at above-mentioned common electrode when being above-mentioned the 1st current potential, with the current potential higher above-mentioned data line is supplied with picture signal than above-mentioned the 1st current potential, when the current potential of above-mentioned common electrode is above-mentioned the 2nd current potential, above-mentioned data line is supplied with picture signal with the current potential lower than above-mentioned the 2nd current potential; And scan line drive circuit, be used for above-mentioned sweep trace is supplied with the control signal that makes above-mentioned on-off element conducting, ends; It is characterized by, above-mentioned bridging line driving circuit has: the drive signal supply circuit is used for supplying with the drive signal of above-mentioned the 1st current potential or above-mentioned the 2nd current potential; Supply with switch with drive signal, be used for this drive signal supply circuit and above-mentioned bridging line are connected disconnection; Also possess equalizing circuit, be used for above-mentioned data line and the above-mentioned shared disconnection that connects are made above-mentioned data line and above-mentioned bridging line equilibrium.
According to the present invention, carry out positive polarity by following step and write.
At first, make common electrode become the 1st current potential by the bridging line driving circuit, and sweep trace is supplied with control signal, make on-off element become conducting state from scan line drive circuit.Then, data line is supplied with picture signal, and it is write pixel electrode and memory capacitance by on-off element from data line drive circuit.Next, make on-off element become cut-off state by scan line drive circuit.Whereby, the 1st current potential of common electrode and the potential difference (PD) between the current potential that pixel electrode write is applied in to liquid crystal is kept by memory capacitance.
Then, by the bridging line driving circuit common electrode is elevated to the 2nd current potential from the 1st current potential.So the potential difference (PD) between the current potential of pixel electrode itself and the common electrode rises together by original state and common electrode.At this moment, though data line utilizes on-off element and pixel electrode to disconnect, because produce capacitive coupling, so the current potential of data line will rise to the current potential identical with pixel electrode with bridging line.
Therefore, comprise that drive signal supply circuit and drive signal supply switch ground constitutes the bridging line driving circuit, making drive signal supply with switch temporarily becomes off-state, and connects data line and bridging line by equalizing circuit.So,, just between data line and common electrode, do not produce movement of electric charges by bridging line from the drive voltage supply of drive signal supply circuit.Thereby data line is not and pixel electrode, but becomes roughly the same current potential with common electrode.
In addition, carrying out negative polarity by following step writes.
At first, make common electrode become the 2nd current potential by the bridging line driving circuit, and sweep trace is supplied with control signal, make on-off element become conducting state from scan line drive circuit.Then, data line is supplied with picture signal, and it is write pixel electrode and memory capacitance by on-off element from data line drive circuit.Next, make on-off element become cut-off state by scan line drive circuit.Whereby, the 2nd current potential of common electrode and the potential difference (PD) between the current potential that pixel electrode write is applied in to liquid crystal is kept by memory capacitance.
Then, by the bridging line driving circuit common electrode is reduced to the 1st current potential from the 2nd current potential.So the potential difference (PD) between the current potential of pixel electrode itself and the common electrode descends together by original state and common electrode.At this moment, though data line utilizes on-off element and pixel electrode to disconnect, because produce capacitive coupling, so the current potential of data line will drop to the current potential identical with pixel electrode with bridging line.
At this, comprise that drive signal supply circuit and drive signal supply switch ground constitutes the bridging line driving circuit, making drive signal supply with switch temporarily becomes off-state, and connects data line and bridging line by the equalization function circuit.So,, just between data line and common electrode, do not produce movement of electric charges by bridging line from the drive voltage supply of drive signal supply circuit.Thereby data line is not and pixel electrode, but becomes roughly the same current potential with common electrode.
As mentioned above, because when making drive signal supply switch become temporary transient off-state, there is not drive voltage supply from the drive signal supply circuit, just between data line and common electrode, produce movement of electric charges, can utilize this electric charge that the current potential of data line, common electrode is changed, so can reduce power consumption.
And data line writes its current potential of favourable direction to the picture signal to next step to be changed, and common electrode also changes to its current potential of direction of the anti-phase work that helps next step.Thereby, can shorten the anti-phase needed time of picture signal write time, the common electrode of pixel electrode.
In addition because data line is not and pixel electrode, but and common electrode become roughly the same current potential, thereby write fashionablely carrying out positive polarity, do not rise to the so high current potential of pixel electrode.On the other hand, write fashionablely carrying out negative polarity, do not drop to the so low current potential of pixel electrode.Thereby, can prevent that the voltage that surpasses the data line drive circuit voltage endurance capability from working.
In addition, in above-mentioned electro-optical device, preferably, above-mentioned data line drive circuit has shift register, in this shift register, if imported initiating signal, then by this initiating signal and clock synchronization are transmitted, comes output sampling signal successively.
According to the present invention, shift register then by this initiating signal and clock synchronization are transmitted, comes output sampling signal successively if imported initiating signal.According to this sampled signal, supply with picture signal successively to per 1 among many data lines.
Drive for the dot sequency that utilizes shift register, because data line drive circuit adopts simple structure just passable, thus can make easily, and can suppress circuit scale.
In addition, according to carried out the electro-optical device that dot sequency drives in the past,, be difficult to guarantee pixel electrode is write the time of picture signal along with the increase of picture element density.And according to the electro-optical device that dot sequency drives that carries out that possesses above-mentioned equalization function circuit, even picture element density increases to some extent, because writing its current potential of favourable direction to the picture signal to next step, data line changes, so still can guarantee pixel electrode is write the time of picture signal.
In addition, in above-mentioned electro-optical device, preferably, above-mentioned data line drive circuit has the multichannel distributor circuit that comprises a plurality of transmission gates, this transmission gate then carries out conducting, ends corresponding to above-mentioned control signal and above-mentioned anti-phase control signal as if the anti-phase control signal after having imported control signal and having made this control signal anti-phase; Distribute analog picture signal selectively by above-mentioned a plurality of transmission gates.
According to the present invention, on the input terminal of multichannel distributor circuit, connect a side's of transmission gate terminal, on lead-out terminal, connect the opposing party's of transmission gate terminal respectively.And, to the input terminal of multichannel distributor circuit, supply with for example mixed analog picture signal of a plurality of picture signals of R (red), G (green), B (indigo plant) and so on, and synchronous with the supply of this analog picture signal, each control signal is become effectively successively.
So transmission gate becomes conducting state from high impedance status successively, each data line is selected successively.Whereby, among analog picture signal, have only the picture signal of R (red), G (green), B (indigo plant) to export successively, supply with corresponding data line from lead-out terminal.
Owing to have this multichannel distributor circuit, thereby can mix a plurality of picture signals and supply with, therefore can suppress the number of transmission path, can suppress circuit scale, and can reduce power consumption.
In addition, in above-mentioned electro-optical device, preferably, above-mentioned data line drive circuit has the D/A change-over circuit that data image signal is converted to analog picture signal, is to drive in proper order with the digital line that the above-mentioned data image signal of being supplied with is supplied with above-mentioned data line as above-mentioned analog picture signal.
According to the present invention, for example, convert data image signal to analog picture signal corresponding to sampled signal from shift register.Then, by each data line is supplied with analog picture signal successively, carry out digital line and drive in proper order.
Like this, adopt digital line to drive in proper order, just can supply with data image signal the data line drive circuit.Therefore, compare, can improve the anti-interference on the transmission path with the situation of the data line drive circuit being supplied with analog picture signal.
Description of drawings
Fig. 1 is the planimetric map of the related electro-optical device of expression the present invention the 1st embodiment.
Fig. 2 is the sequential chart that the positive polarity of the related shared anti-phase type of drive of employing of above-mentioned embodiment is write fashionable electro-optical device.
Fig. 3 is the sequential chart that the negative polarity of the related shared anti-phase type of drive of employing of above-mentioned embodiment is write fashionable electro-optical device.
Fig. 4 is the planimetric map of the related electro-optical device of the present invention's the 2nd embodiment.
Fig. 5 is the planimetric map of the related electro-optical device of the present invention's the 3rd embodiment.
Fig. 6 is the planimetric map of the related electro-optical device of the present invention's the 4th embodiment.
Fig. 7 is the circuit block diagram of the related electro-optical device of above-mentioned embodiment.
Fig. 8 is the stereographic map of related electro-optical device 1 structure of above-mentioned embodiment of expression and variation.
Fig. 9 is the Z-Z ' sectional view among Fig. 8.
Figure 10 is the stereographic map that the pocket telephone structure of above-mentioned electro-optical device is used in expression.
Figure 11 is the present invention's planimetric map of the related electro-optical device of example in the past.
Figure 12 is that the related electro-optical device positive polarity of example was write fashionable sequential chart in the past.
Figure 13 is that the related electro-optical device negative polarity of example was write fashionable sequential chart in the past.
Symbol description
1,1A, 1B, 1C, 1D, 1E ... electro-optical device, 21 ... the drive signal supply circuit, 22 ... drive signal is supplied with switch, 101,402 ... scan line drive circuit, 102,102A, 102B, 102C, 102D, 401 ... data line drive circuit, 103,103A ... the bridging line driving circuit, 110 ... sweep trace, 120 ... data line, 130 ... bridging line, 150 ... image element circuit, 151 ... TFT, 153 ... memory capacitance, 155,406 ... image element circuit, 156 ... common electrode, 201,201A ... the equalization function circuit, 222 ... switching mechanism, 331 ... shift register, 332 ... analog switch, 333 ... the D/A change-over circuit, 441,441A ... the multichannel distributor circuit.
Embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.Also have, in the middle of the explanation of embodiment, enclose identical symbol below, to omit or to simplify its explanation for identical structure important document.
＜1. the 1st embodiment 〉
Fig. 1 is the planimetric map of the related electro-optical device 1A of the present invention's the 1st embodiment.The difference of the electro-optical device 1 of electro-optical device 1A and Figure 11 is to have the structure of equalization function circuit 201 and bridging line driving circuit 103A.
Bridging line driving circuit 103A possesses: drive signal supply circuit 21 is used for supplying with the drive signal of the 1st current potential or 2nd current potential higher than the 1st current potential; Supply with switch 22 with drive signal, be used for this drive signal supply circuit 21 and bridging line 130 are connected disconnection.
Drive signal supply circuit 21 possesses power supply IC (integrated circuit) 211, is used for alternately exporting the 1st current potential or the 2nd current potential by predetermined period.
Drive signal is supplied with switch 22 and is possessed: drive IC 221, with generating control signal CC; With switching mechanism 222, be used for carrying out conducting, disconnection corresponding to control signal CC from this drive IC 221.Particularly, in the present embodiment, when switching mechanism 222 is " H " level at control signal CC, drive signal supply circuit 21 and bridging line 130 are disconnected, when control signal CC is " L " level, connect drive signal supply circuit 21 and bridging line 130.
Above-mentioned bridging line driving circuit 103A is when being conducting state corresponding to its switching mechanism 222 of control signal CC that drive IC 221 generated, and alternately the 1st current potential or the 2nd current potential of output are supplied with bridging line 130 will to press predetermined period from power supply IC211.
Fig. 2 is the sequential chart that the positive polarity of the shared anti-phase type of drive of employing is write fashionable electro-optical device 1A.Fig. 3 is the sequential chart that the negative polarity of the shared anti-phase type of drive of employing is write fashionable electro-optical device 1A.Fig. 2 and Fig. 3 represent the situation that writes with identical gray shade scale.In addition, in Fig. 2,3, VCOM is the current potential of common electrode 156, and SOURCE is the current potential of data line 120, and GATE is the current potential of sweep trace 110, and PIX is the current potential of pixel electrode 155.
In positive polarity writes, as shown in Figure 2, at first the current potential VCOM of common electrode 156 is become the 1st current potential VCL, and supply with the control signal that the current potential GATE that makes sweep trace 110 becomes current potential VGH, make TFT151 become conducting state from scan line drive circuit 101 by bridging line driving circuit 103A.The current potential SOURCE of data line 120 is because by following data line 120 that carries out as the equalization function circuit 201 of equalizing circuit and the connection between the bridging line 130, so be the current potential roughly the same with the current potential VCOM of common electrode 156.
Then, at moment t1, supply with picture signals by data line drive circuit 102, the current potential SOURCE of data line 120 is raise from current potential VCL is current potential VP5, and by TFT151 it is write pixel electrode 155 and memory capacitance 153.
Then, at moment t2, make TFT151 become cut-off state by scan line drive circuit 101.Whereby, the potential difference (PD) between the 1st current potential VCL of common electrode 156 and the current potential VP5 that pixel electrode 155 is write is applied in to liquid crystal, is kept by memory capacitance 153.
Then, at moment t3, the current potential VCOM of common electrode 156 is elevated to the 2nd current potential VCH from the 1st current potential VCL by bridging line driving circuit 103A.So, the current potential PIX of pixel electrode 155, make potential difference (PD) between the current potential VCOM of itself and common electrode 156 by original state ground, will rise to current potential VP2 together with common electrode 156.At this moment, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect, because produce capacitive coupling, so the current potential SOURCE of data line 120 will rise to the current potential VP2 identical with the current potential PIX of pixel electrode 155 with bridging line 130.
Therefore, at moment t3, control signal CC, CP are become current potential VCPH from current potential VCPL.So switching mechanism 222 becomes off-state, equalization function circuit 201 connects data line 120 and bridging line 130.So,, just between data line 120 and common electrode 156, do not produce movement of electric charges by bridging line 130 from the drive voltage supply of drive signal supply circuit 21.Thereby the current potential SOURCE of data line 120 is not the current potential PIX with pixel electrode 155, but will become roughly the same current potential with the current potential VCOM of common electrode 156.
Then, at moment t4, control signal CC, CP are become current potential VCPL from current potential VCPH.So switching mechanism 222 becomes conducting state, equalization function circuit 201 disconnects data line 120 and bridging line 130.Thereby, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect because and bridging line 130 generation capacitive coupling, so the current potential SOURCE of data line 120 will with the current potential VCOM of common electrode 156 together, rise to the 2nd current potential VCH.
Like this, by control signal CC, CP are temporarily become current potential VCPH, the current potential SOURCE of data line 120 just becomes the current potential roughly the same with the current potential VCOM of common electrode 156.Then, because data line 120 and bridging line 130 produce capacitive coupling, so by control signal CC, CP are become current potential VCPL, the current potential SOURCE of data line 120 just and the current potential VCOM of common electrode 156 together, rise to roughly the same current potential with the 2nd current potential VCH.
Below, in negative polarity writes, as shown in Figure 3, at first the current potential VCOM of common electrode 156 is become the 2nd current potential VCH by bridging line driving circuit 103A, and supply with the control signal that the current potential GATE that makes sweep trace 110 becomes current potential VGH from scan line drive circuit 101, make TFT151 become conducting state.The current potential SOURCE of data line 120 is because of data line 120 that is undertaken by above-mentioned equalization function circuit 201 and the connection between the bridging line 130, so be the current potential roughly the same with the current potential VCOM of common electrode 156.
Then,, supply with picture signals, the current potential SOURCE of data line 120 is reduced to current potential VP6 from current potential VCH, it is write pixel electrode 155 and memory capacitance 153 by TFT151 by data line drive circuit 102 at moment t5.
Then, at moment t6, make TFT151 become cut-off state by scan line drive circuit 101.Whereby, the potential difference (PD) between the 2nd current potential VCH of common electrode 156 and the current potential VP6 that pixel electrode 155 is write is applied in to liquid crystal, is kept by memory capacitance 153.
Then, at moment t7, the current potential VCOM of common electrode 156 is reduced to the 1st current potential VCL from the 2nd current potential VCH by bridging line driving circuit 103A.So, the current potential PIX of pixel electrode 155, make potential difference (PD) between the current potential VCOM of itself and common electrode 156 by original state ground, will drop to current potential VP1 together with common electrode 156.At this moment, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect, because produce capacitive coupling, so the current potential SOURCE of data line 120 will drop to the current potential VP1 identical with the current potential PIX of pixel electrode 155 with bridging line 130.
Therefore, at moment t7, control signal CC, CP are become current potential VCPH from current potential VCPL.So switching mechanism 222 becomes off-state, equalization function circuit 201 connects data line 120 and bridging line 130.So,, just between data line 120 and common electrode 156, do not produce movement of electric charges by bridging line 130 from the drive voltage supply of drive signal supply circuit 21.Thereby the current potential SOURCE of data line 120 is not the current potential PIX with pixel electrode 155, but will become roughly the same current potential with the current potential VCOM of common electrode 156.
Then, at moment t8, control signal CC, CP are become current potential VCPL from current potential VCPH.So switching mechanism 222 becomes conducting state, equalization function circuit 201 disconnects data line 120 and bridging line 130.Thereby, though data line 120 utilizes TFT151 and pixel electrode 155 to disconnect because and bridging line 130 generation capacitive coupling, so the current potential SOURCE of data line 120 will with the current potential VCOM of common electrode 156 together, drop to the 1st current potential VCL.
Like this, by control signal CC, CP are temporarily become current potential VCPH, the current potential SOURCE of data line 120 just becomes the current potential roughly the same with the current potential VCOM of common electrode 156.Then, because data line 120 and bridging line 130 produce capacitive coupling, so by control signal CC, CP are become current potential VCPL, the current potential SOURCE of data line 120 just and the current potential VCOM of common electrode 156 together, rise to roughly the same current potential with the 1st current potential VCL.
According to present embodiment, has following effect.
(1) because when making switching mechanism 222 temporarily become off-state, there is not drive voltage supply from drive signal supply circuit 21, just between data line 120 and common electrode 156, produce movement of electric charges, can utilize this electric charge that the current potential of data line 120, common electrode 156 is changed, so can reduce power consumption.
(2) data line 120 writes its current potential of favourable direction to the picture signal to next step and changes, and common electrode 156 also changes to its current potential of direction of the anti-phase work that helps next step.Thereby, can shorten picture signal write time and 156 anti-phase needed times of common electrode to pixel electrode 155.
(3) since data line 120 be not and pixel electrode 155, but and common electrode 156 become roughly the same current potential, thereby write fashionablely having carried out positive polarity, do not rise to the so high current potential of pixel electrode 155.On the other hand, write fashionablely having carried out negative polarity, do not drop to the so low current potential of pixel electrode 155.Thereby, can prevent that the voltage that surpasses data line drive circuit 102 voltage endurance capabilities from working.
＜2. the 2nd embodiment 〉
Fig. 4 is the planimetric map of the related electro-optical device 1B of the present invention's the 2nd embodiment.The difference of electro-optical device 1B and Fig. 1 electro-optical device 1A is the structure of data line drive circuit 102A.
Data line drive circuit 102A possesses: shift register 331, if imported initiating signal, then by this initiating signal and clock synchronization are transmitted, come output sampling signal successively; With analog switch 332, be used for corresponding to sampled signal from this shift register 331, select each data line 120 successively.
According to above-mentioned data line drive circuit 102A, if with initiating signal input shift register 331, shift register 331 output sampling signals then, analog switch 332 is selected each data line 120 successively corresponding to the sampled signal from this shift register 331.Then, by to supplying with picture signal, carry out dot sequency and drive by analog switch 332 selected data lines 120.
The sequential chart of the electro-optical device 1B that present embodiment is related is identical with electro-optical device 1A.Also have, the black-out intervals that is operated in electro-optical device 1B from moment t7 to moment t8 the work from moment t3 to moment t4 among Fig. 2 and Fig. 3 carries out.
According to present embodiment, except that above-mentioned (1)～(3), also has following effect.
(4) drive for the dot sequency that utilizes shift register to carry out, because data line drive circuit 102A adopts simple structure just passable, thus can make easily, and can suppress circuit scale.
(5) the employing electro-optical device that carries out the dot sequency driving in the past along with the increase of picture element density, is difficult to guarantee pixel electrode is write the time of picture signal.Above-mentioned possess equalization function circuit 201, carry out the electro-optical device 1B that dot sequency drives and adopt as equalizing circuit, even picture element density increases to some extent, because writing its current potential of favourable direction to the picture signal to next step, data line 120 changes, so can guarantee pixel electrode 155 is write the time of picture signal.
＜3. the 3rd embodiment 〉
Fig. 5 is the planimetric map of the related electro-optical device 1C of the present invention's the 3rd embodiment.The difference of the electro-optical device 1B of electro-optical device 1C and Fig. 4 is the structure of data line drive circuit 102B.
Data line drive circuit 102B possesses the digital line sequential circuit, and this digital line sequential circuit comprises: shift register 331, if imported initiating signal, then by this initiating signal and clock synchronization are transmitted, come output sampling signal successively; And D/A (digital-to-analog) change-over circuit 333, the data image signal that is used for being supplied with converts analog picture signal to.
According to above-mentioned data line drive circuit 102B, if with initiating signal input shift register 331, shift register 331 output sampling signals then, D/A change-over circuit 333 converts data image signal to analog picture signal corresponding to the sampled signal from this shift register 331.Then, by each data line 120 is supplied with analog picture signal, carry out digital line and drive in proper order.
The sequential chart of the electro-optical device 1C that present embodiment is related is identical with electro-optical device 1A.Also have, the black-out intervals that is operated in electro-optical device 1C from moment t7 to moment t8 the work from moment t3 to moment t4 among Fig. 2 and Fig. 3 carries out.
According to present embodiment, except that above-mentioned (1)～(3), also has following effect.
(6) adopt digital line to drive in proper order, can supply with data image signal data line drive circuit 102B.Therefore, compare, can improve the anti-interference on the transmission path with the situation of data line drive circuit 102B being supplied with analog picture signal.
＜4. the 4th embodiment 〉
Fig. 6 is the planimetric map of the related electro-optical device 1D of the present invention's the 4th embodiment.The difference of the electro-optical device 1C of electro-optical device 1D and Fig. 5 is the structure of data line drive circuit 102C.
Data line drive circuit 102C possesses multichannel distributor circuit 441, if input control signal SEL, then corresponding to this control signal SEL, based on supplied with the mixed analog picture signal SEG of a plurality of picture signals, export a plurality of picture signals.
Fig. 7 is the circuit block diagram of electro-optical device 1E.Electro-optical device 1E represents is that the electro-optical device 1D of Fig. 6 has, as an exemplifying embodiment of equalization function circuit 201, multichannel distributor circuit 441 and the switching mechanism 222 of equalizing circuit.
Data line drive circuit 102D is made of n multichannel allocation unit circuit A1～An.Here, n is the natural number more than or equal to 2.
Multichannel allocation unit circuit A1～An has the 1st, the 2nd, the 3rd transmission gate 461,462,463 respectively.Particularly, at multichannel allocation unit circuit Am (for example, m is the natural number that is less than or equal to n) in, a side's of the 1st～the 3rd transmission gate 461～463 terminal all is connected to input terminal SINm, and the opposing party's terminal is connected respectively to lead-out terminal SOUTm1～SOUTm3.
Lead-out terminal SOUTm1～SOUTm3 is connected with R (red), G (green), B (indigo plant) data line 120 of all kinds respectively.That is to say that each multichannel allocation unit circuit Am supplies with picture signal to each sub-pixel of R (red), G (green), B (indigo plant).
To input terminal SINm, input is with R (red), G (green), B (indigo plant) the mixed analog picture signal SEGm of picture signal of all kinds.
To the control terminal of the 1st transmission gate 461 of multichannel allocation unit circuit A1～An, supply with R control signal RSEL and the anti-phase R control signal RSELB after anti-phase with this R control signal RSEL.
If R control signal RSEL and anti-phase R control signal RSELB are become effectively, then transmission gate 461 becomes conducting state, the picture signal of R (red) is supplied with the data line 120 of R (red) according to the analog picture signal of being imported from input terminal SINm.
To the control terminal of the 2nd transmission gate 462 of multichannel allocation unit circuit A1～An, supply with G control signal GSEL and the anti-phase G control signal GSELB after anti-phase with this G control signal GSEL.
If G control signal GSEL and anti-phase G control signal GSELB are become effectively, then transmission gate 462 becomes conducting state, the picture signal of G (green) is supplied with the data line 120 of G (green) according to the analog picture signal of being imported from input terminal SINm.
To the control terminal of the 3rd transmission gate 463 of multichannel allocation unit circuit A1～An, supply with B control signal BSEL and the anti-phase B control signal BSELB after anti-phase with this B control signal BSEL.
If B control signal BSEL and anti-phase B control signal BSELB are become effectively, then transmission gate 463 becomes conducting state, the picture signal of B (indigo plant) is supplied with the data line 120 of B (indigo plant) according to the analog picture signal of being imported from input terminal SINm.
Above multichannel distributor circuit 441A followingly carry out work.
Input terminal SIN1～SINn to multichannel allocation unit circuit A1～An supplies with analog picture signal SEG1～SEGn, and the either party among R control signal RSEL and anti-phase R control signal RSELB, G control signal GSEL and anti-phase G control signal GSELB and B control signal BSEL and the anti-phase B control signal BSELB is become effectively.Whereby, among R (red), G (green), B (indigo plant) data line 120 of all kinds, select specific data line 120, this selected data line 120 that goes out is supplied with picture signals.
Thereby, can take out R (red), G (green), B (indigo plant) picture signal of all kinds from R (red), G (green), B (indigo plant) the mixed analog picture signal of picture signal of all kinds.
The sequential chart of the electro-optical device 1E that present embodiment is related is identical with electro-optical device 1A.Also have, the each multichannel distributor circuit 441A from electro-optical device 1E that is operated in from moment t7 to moment t8 the work from moment t3 to moment t4 among Fig. 2 and Fig. 3 supplies with picture signals to each data line 120, all will carry out.
According to present embodiment, except that above-mentioned (1)～(3), also has following effect.
(7) adopt above-mentioned multichannel distributor circuit 441A, supply with owing to can mix a plurality of picture signals, thereby can limit the number of transmission path, can suppress circuit scale, and can reduce power consumption.
＜5. variation 〉
Also have, the present invention is not defined as above-mentioned embodiment, is included among the present invention and can reach distortion in the scope of the object of the invention, improvement etc.
For example, the drive signal that bridging line and bridging line driving circuit are connected disconnection is supplied with switch and also can be arranged at the outside of bridging line being supplied with the bridging line driving circuit of drive signal.
In addition, the bridging line driving circuit also can be arranged on the device substrate.
In addition, though, supply with identical drive signal, also can supply with different drive signals respectively to counter electrode and memory capacitance.
In addition, the control signal CP that the equalization function circuit is supplied with and above-mentioned drive signal is supplied with the control signal CC that switch supplies with also can be the signal of the different different system of work timing.
＜6. electro-optical device 〉
Fig. 8 is the stereographic map of the structure of the related electro-optical device 1 of above-mentioned embodiment of expression and variation, and Fig. 9 is the Z-Z ' sectional view among Fig. 8.
Electro-optical device 1 places in housing 400 (with dashed lines is represented among Fig. 9).Electro-optical device 1 has: device substrate 451 is formed with pixel electrode 406 etc.; Subtend substrate 452 is with the configuration of this device substrate 451 subtends and be formed with common electrode 156 etc.; As the liquid crystal 455 of electro-optical substance, be arranged between device substrate 451 and the subtend substrate 452; And, be arranged at the downside (side opposite) of device substrate 451 with subtend substrate 452 as the backlight 450 of light source, be used for to liquid crystal 455 irradiates lights.Device substrate 451 is formed by glass or semiconductor etc., on this device substrate 451, uses TFT (Thin Film Transistor: thin film transistor (TFT)) form various circuit etc.In addition, subtend substrate 452 is formed by the transparent material of glass etc.
Outer part at subtend substrate 452 is provided with seal member 454, is used for the gap of seal element substrate 451 and subtend substrate 452.Sealing parts 454 and device substrate 451 and subtend substrate 452 form the space that is used for enclosing liquid crystal 455 together.In seal member 454,, sneaked into liner 453 for the interval of holding element substrate 451 and subtend substrate 452.Also have, in seal member 454, form the peristome that is used for enclosing liquid crystal 455, and this peristome seals with encapsulant 456 after liquid crystal 455 is enclosed.
At this, in subtend substrate 452 side surfaces of device substrate 451 and seal member 454 outside on one side, form and be used for the data line drive circuit 401 of driving data lines, this data line drive circuit 401 press the extension of Y direction.Moreover, on this one side, form a plurality of connection electrode 457, import various signals by this connection electrode 457.In addition, on the limit of the both sides on above-mentioned one side of seal member 454, form and be used for the scan line drive circuit 402 of driven sweep line, this scan line drive circuit 402 press the directions X extension.
＜7. electronic equipment 〉
Below, the electronic equipment for using the related electro-optical device 1 of above-mentioned embodiment describes.Figure 10 represents to use the structure of the pocket telephone of electro-optical device 1.Pocket telephone 3000 has a plurality of action buttons 3001, scroll button 3002 and as the electro-optical device 1 of display unit.By operation scroll button 3002, the picture that is shown on the electro-optical device 1 is rolled.
Claims (6)
1. electro-optical device, wherein,
Possess: clip electro-optical substance and a pair of substrate of subtend;
Many sweep traces;
With these sweep traces many data lines of quadrature roughly;
With above-mentioned sweep trace almost parallel and many bridging lines being arranged alternately;
The pixel electrode that is provided with corresponding to the infall of above-mentioned sweep trace and above-mentioned data line;
On-off element, it makes above-mentioned data line be connected disconnection with pixel electrodes according to the control signal from above-mentioned sweep trace;
Memory capacitance, one end are connected in pixel electrodes, the other end is connected with above-mentioned bridging line;
The bridging line driving circuit, its drive signal with the 1st current potential or 2nd current potential higher than the 1st current potential is supplied with above-mentioned bridging line;
Data line drive circuit, when its current potential at above-mentioned bridging line is above-mentioned the 1st current potential, with the current potential higher above-mentioned data line is supplied with picture signal than above-mentioned the 1st current potential, when the current potential of above-mentioned bridging line is above-mentioned the 2nd current potential, above-mentioned data line is supplied with picture signal with the current potential lower than above-mentioned the 2nd current potential; And
Scan line drive circuit, it supplies with the control signal that makes above-mentioned on-off element conducting, ends to above-mentioned sweep trace;
It is characterized by:
Possesses equalizing circuit, it is to above-mentioned data line and above-mentioned bridging line, in positive polarity writes by above-mentioned bridging line driving circuit with the current potential of above-mentioned bridging line when above-mentioned the 1st current potential is elevated to above-mentioned the 2nd current potential and negative polarity writes by above-mentioned bridging line driving circuit with the current potential of above-mentioned bridging line when above-mentioned the 2nd current potential is reduced to above-mentioned the 1st current potential, connect disconnection, make above-mentioned data line and above-mentioned bridging line become identical current potential.
2. electro-optical device according to claim 1 is characterized by:
Above-mentioned data line drive circuit has shift register, and this shift register is if the input initiating signal then by this initiating signal and clock synchronization are transmitted, comes output sampling signal successively.
3. electro-optical device according to claim 1 is characterized by:
Above-mentioned data line drive circuit has the multichannel distributor circuit that comprises a plurality of transmission gates, this transmission gate if input control signal and make this control signal anti-phase after anti-phase control signal, then carry out conducting, end according to above-mentioned control signal and above-mentioned anti-phase control signal; Distribute analog picture signal selectively by above-mentioned a plurality of transmission gates.
4. electro-optical device according to claim 1 is characterized by:
Above-mentioned data line drive circuit has the D/A change-over circuit that data image signal is converted to analog picture signal, is that the above-mentioned data image signal that will be supplied with converts above-mentioned analog picture signal to, digital line that above-mentioned data line is supplied with drives in proper order.
5. electronic equipment is characterized by:
Possesses each described electro-optical device in the claim 1 to 4.
6. method of driving electro-optical device, this electro-optical device possesses:
Clip electro-optical substance and a pair of substrate of subtend;
Many sweep traces;
With these sweep traces many data lines of quadrature roughly;
With above-mentioned sweep trace almost parallel and many bridging lines being arranged alternately;
The pixel electrode that is provided with corresponding to the infall of above-mentioned sweep trace and above-mentioned data line;
On-off element, it makes above-mentioned data line be connected disconnection with pixel electrodes according to the control signal from above-mentioned sweep trace;
Memory capacitance, one end are connected in pixel electrodes, the other end is connected with above-mentioned bridging line;
The bridging line driving circuit, its drive signal with the 1st current potential or 2nd current potential higher than the 1st current potential is supplied with above-mentioned bridging line;
Data line drive circuit, when its current potential at above-mentioned bridging line is above-mentioned the 1st current potential, with the current potential higher above-mentioned data line is supplied with picture signal than above-mentioned the 1st current potential, when the current potential of above-mentioned bridging line is above-mentioned the 2nd current potential, above-mentioned data line is supplied with picture signal with the current potential lower than above-mentioned the 2nd current potential; And
Scan line drive circuit, it supplies with the control signal that makes above-mentioned on-off element conducting, ends to above-mentioned sweep trace;
Being characterized as of this method of driving electro-optical device:
Be provided with: the drive signal supply circuit, it supplies with the drive signal of above-mentioned the 1st current potential or above-mentioned the 2nd current potential to above-mentioned bridging line driving circuit; Supply with switch with drive signal, it connects disconnection to this drive signal supply circuit and above-mentioned bridging line;
Comprise:
The positive polarity write step, wherein, make above-mentioned drive signal supply with switch and become conducting state, making above-mentioned bridging line is above-mentioned the 1st current potential, and above-mentioned sweep trace is supplied with control signal from above-mentioned scan line drive circuit, make above-mentioned on-off element become conducting state in advance, above-mentioned data line is supplied with picture signal, it is write pixel electrodes and above-mentioned memory capacitance by above-mentioned on-off element from above-mentioned data line drive circuit;
Positive polarity writes the maintenance step, wherein, make above-mentioned on-off element become conducting state by above-mentioned scan line drive circuit, impose on liquid crystal, kept by above-mentioned memory capacitance with above-mentioned the 1st current potential of above-mentioned bridging line and to the potential difference (PD) of the current potential that pixel electrodes write;
Positive polarity writes current potential rising step, wherein, by above-mentioned drive signal supply circuit, above-mentioned bridging line is elevated to above-mentioned the 2nd current potential from above-mentioned the 1st current potential;
Negative polarity writes the maintenance step, wherein, make above-mentioned on-off element become conducting state by above-mentioned scan line drive circuit, impose on liquid crystal, kept by above-mentioned memory capacitance with above-mentioned the 2nd current potential of above-mentioned bridging line and to the potential difference (PD) of the current potential that pixel electrodes write; And
Negative polarity writes current potential and reduces step, wherein, by above-mentioned drive signal supply circuit, above-mentioned bridging line is reduced to above-mentioned the 1st current potential from above-mentioned the 2nd current potential;
Carry out top step repeatedly,
Write in the current potential rising step in above-mentioned positive polarity, make above-mentioned drive signal supply with switch temporarily become off-state and connect above-mentioned data line and above-mentioned bridging line after, make above-mentioned drive signal supply with switch again and become conducting state, by above-mentioned drive signal supply circuit above-mentioned bridging line is elevated to above-mentioned the 2nd current potential from above-mentioned the 1st current potential
Writing current potential in above-mentioned negative polarity reduces in the step, make above-mentioned drive signal supply with switch temporarily become off-state and connect above-mentioned data line and above-mentioned bridging line after, making above-mentioned drive signal supply with switch again becomes conducting state, by above-mentioned drive signal supply circuit above-mentioned bridging line is reduced to above-mentioned the 1st current potential from above-mentioned the 2nd current potential.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP162214/2005 | 2005-06-02 | ||
| JP2005162214 | 2005-06-02 | ||
| JP2006076307A JP4400588B2 (en) | 2005-06-02 | 2006-03-20 | Electro-optical device, driving method of electro-optical device, and electronic apparatus |
| JP076307/2006 | 2006-03-20 |
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| CNB200610088527XA Division CN100476945C (en) | 2005-06-02 | 2006-06-01 | Electro-optical device, method of driving electro-optical device, and electronic apparatus |
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| CN2009100064106A Expired - Fee Related CN101482680B (en) | 2005-06-02 | 2006-06-01 | Electro-optical device, method of driving electro-optical device, and electronic apparatus |
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| JP2012181396A (en) * | 2011-03-02 | 2012-09-20 | Seiko Epson Corp | Electro-optical apparatus and electronic apparatus |
| CN108885855A (en) * | 2016-01-13 | 2018-11-23 | 深圳云英谷科技有限公司 | Show equipment and pixel circuit |
| CN106847221A (en) | 2017-03-20 | 2017-06-13 | 京东方科技集团股份有限公司 | Shift register cell, gate driving circuit and driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1372241A (en) * | 2001-02-26 | 2002-10-02 | 三星电子株式会社 | LCD and driving method thereof |
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| CN1372241A (en) * | 2001-02-26 | 2002-10-02 | 三星电子株式会社 | LCD and driving method thereof |
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| Title |
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| JP特开2002-244622A 2002.08.30 |
| JP特开2003-271105A 2003.09.25 |
| JP特开2003-302951A 2003.10.24 |
| JP特开2004-191536A 2004.07.08 |
| JP特开2004-354758A 2004.12.16 |
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| CN100476945C (en) | 2009-04-08 |
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