Summary of the invention
Technical matters to be solved by this invention is to provide a kind of pel array, and its design can also promote the display quality of display frame after the use amount and cost of saving drive unit.
The present invention provides a kind of display panel in addition, and it comprises above-mentioned pel array, therefore can effectively reduce the cost of drive unit, also has superior display quality.
The present invention provides a kind of method that drives pel array again, and it is in order to drive above-mentioned display panel.
For specifically describing content of the present invention, at this a kind of pel array is proposed, it comprises a plurality of pixel groups that are positioned on the substrate, and wherein each pixel groups comprises one first sweep trace, one second sweep trace, a data line, one first active member, one second active member, one first pixel electrode, one second pixel electrode, one first shared electrode wire and one second shared electrode wire.First sweep trace and one second sweep trace be arranged in parallel, and vertical first sweep trace of data line and second sweep trace.First active member and first sweep trace and data line electrically connect, and second active member electrically connects with the electric connection of second sweep trace and with first active member.First pixel electrode and first active member electrically connect, and second pixel electrode and second active member electrically connect.First shared electrode wire is positioned at first pixel electrode below and is electrically connected to a direct current power supply, and forms one first storage capacitors between first shared electrode wire and first pixel electrode.Second shared electrode wire is positioned at second pixel electrode below and is electrically connected to an AC power, and forms one second storage capacitors between second shared electrode wire and second pixel electrode.
For specifically describing content of the present invention, at this a kind of display panel is proposed in addition, it comprises one first substrate, one second substrate and a display medium.Comprise on first substrate being provided with a pel array, wherein pel array comprises a plurality of pixel groups.Each pixel groups comprises one first sweep trace, one second sweep trace, a data line, one first active member, one second active member, one first pixel electrode, one second pixel electrode, one first shared electrode wire and one second shared electrode wire.First sweep trace and one second sweep trace be arranged in parallel, and vertical first sweep trace of data line and second sweep trace.First active member and first sweep trace and data line electrically connect, and second active member electrically connects with the electric connection of second sweep trace and with first active member.First pixel electrode and first active member electrically connect, and second pixel electrode and second active member electrically connect.First shared electrode wire is positioned at first pixel electrode below and is electrically connected to a direct current power supply, and forms one first storage capacitors between first shared electrode wire and first pixel electrode.Second shared electrode wire is positioned at second pixel electrode below and is electrically connected to an AC power, and forms one second storage capacitors between second shared electrode wire and second pixel electrode.Second substrate is positioned at the subtend of first substrate, and display medium is between first substrate and second substrate.
In one embodiment of this invention, the source electrode of the drain electrode of first active member and second active member electrically connects.
In one embodiment of this invention, aforesaid display panel and pel array more comprise a connecting line, and this connecting line electrically connects the drain electrode of first active member and the source electrode of second active member, and between first pixel electrode and second pixel electrode.
In one embodiment of this invention, a plurality of first branches that first shared electrode wire comprises one first common lines and is connected with first common lines, the wherein first common lines parallel first sweep trace setting substantially, and vertical first common lines of first branch.A plurality of second branches that second shared electrode wire comprises one second common lines and is connected with second common lines, the wherein second common lines parallel second sweep trace setting substantially, and vertical second common lines of second branch.In one embodiment, first branch and first pixel electrode overlap, and do not overlap with second pixel electrode.In another embodiment, second branch and second pixel electrode overlap, and do not overlap with first pixel electrode.
In one embodiment of this invention, aforesaid display panel and pel array more comprise at least one first main line and at least one second main line.First main line is configured in the edge of substrate, and wherein first main line and first shared electrode wire electrically connect, and first main line and direct supply electric connection.Second main line is configured in the edge of substrate, and wherein second main line and second shared electrode wire electrically connect, and second main line and AC power electric connection.In one embodiment, first main line and second main line are to belong to same rete, and first shared electrode wire and second shared electrode wire are to belong to another rete.In another embodiment, first main line and first shared electrode wire are to belong to same rete, and second main line and second shared electrode wire are to belong to another rete.In another embodiment, first main line, first shared electrode wire and second shared electrode wire are to belong to same rete, and second main line is to belong to another rete.
For specifically describing content of the present invention, at this a kind of method that drives pel array is proposed again, it is in order to drive aforesaid pel array.This method that drives pel array comprises: first shared electrode wire is imported a direct current voltage, and second shared electrode wire is imported an alternating voltage.Open second active member so that second pixel electrode is charged into electric charge, and the waveform of the online alternating voltage of second shared electrode from the high levle transition to low level.Close second active member, and the waveform of the online alternating voltage of second shared electrode from the low level transition to high levle.
In one embodiment of this invention, the size of the online alternating voltage of first shared electrode is adjustable.
In one embodiment of this invention, the concussion scope of alternating voltage is-10 volts to 10 volts.In a preferred embodiment, the concussion scope of alternating voltage is 2.3 volts to 3.7 volts.
Each pixel groups in display panel of the present invention and the pel array thereof comprises two shared electrode wire, the arrange in pairs or groups method of driving pel array of the present invention, so that these two shared electrode wire receive DC voltage and alternating voltage respectively, wherein share online alternating voltage and help to improve the bad picture that two voltage coupling effects between the active member are produced.Yet, this bad picture be because each pixel groups in two pixel electrodes on recalcitrate voltage (
) different, so that pixel groups has two kinds of different current potentials, and then make these two pixel electrodes show different brightness.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Description of drawings
Fig. 1 illustrates the equivalent circuit diagram of a kind of pel array of prior art;
Fig. 2 illustrates the synoptic diagram of the pel array of one embodiment of the invention;
The equivalent circuit diagram that Fig. 3 is illustrated for the pixel groups according to Fig. 2;
Fig. 4 illustrates the drive waveforms figure of the pixel groups of one embodiment of the invention;
Fig. 5 illustrates the synoptic diagram of the display panel of one embodiment of the invention;
Fig. 6 illustrates the synoptic diagram of the pel array of another embodiment of the present invention.
Wherein, Reference numeral:
100,200: pel array 110: pixel
112: sweep trace 114,214: data line
116: active member 118: pixel electrode
120: shared electrode wire 160,210,610: pixel groups
212a: the first sweep trace 212b: second sweep trace
216a: the first active member 21b: second active member
218a: the first pixel electrode 218b: second pixel electrode
220a: the first shared electrode wire 220b: second shared electrode wire
222a: the first common lines 222b: second common lines
224a: first 224b of branch: second branch
300,400: substrate 350: display medium
500: display panel 502: viewing area
504: 510: the first main lines in perimeter circuit district
520: the second main line A1, A2, A3, A4: zone
AC: alternating voltage waveform C
St0: storage capacitors
C
St1: the first storage capacitors C
St2: second storage capacitors
CL: connecting line DC: DC voltage waveform
DS: data signal waveforms G1, G2: sweep signal waveform
PA, PD: voltage waveform t1, the t2 of pixel electrode: time
V
AC: AC power V
DC: direct supply
VH: high levle VL: low level
Embodiment
Fig. 2 illustrates the synoptic diagram of the pel array of one embodiment of the invention, and the equivalent circuit diagram that Fig. 3 is illustrated for the pixel groups according to Fig. 2.Please be simultaneously with reference to Fig. 2 and Fig. 3, the pel array 200 of present embodiment comprises a plurality of pixel groups 210 that are positioned on the substrate 300, wherein pixel groups 210 for example is to present stripe-arrangement (stripe type).Each pixel groups 210 comprises one first sweep trace 212a, one second sweep trace 212b, a data line 214, one first active member 216a, one second active member 216b, one first pixel electrode 218a, one second pixel electrode 218b, one first shared electrode wire 220a and one second shared electrode wire 220b.In the present embodiment, the first sweep trace 212a and the second sweep trace 212b are made of the first metal layer, data line 214 is made of second metal level, and the first shared electrode wire 220a and the second shared electrode wire 220b are made of the transparency conducting layer that is positioned at the first metal layer and second metal level top, and wherein second metal level is between the first metal layer and transparency conducting layer.Yet in other embodiments, data line 214 is made of the first metal layer, and the first sweep trace 212a and the second sweep trace 212b are made of second metal level.
The first sweep trace 212a and one second sweep trace 212b be arranged in parallel, and the data line 214 vertical first sweep trace 212a and the second sweep trace 212b.Wherein, the first active member 216a and the first sweep trace 212a and data line 214 electrically connects, and the second active member 216b electrically connects with second sweep trace 212b electric connection and with the first active member 216a.In the present embodiment, the drain D 1 of the first active member 216a and the source S of the second active member 216b 2 electrically connect, so that the second active member 216b and the first active member 216a electrically connect.As shown in Figure 2, have a connecting line CL between the first pixel electrode 218a and the second pixel electrode 218b, it is in order to the drain D 1 that electrically connects the first active member 216a and the source S 2 of the second active member 216b.Thus, the second active member 216b just can electrically connect with data line 214 by the first active member 216a.In addition, the first pixel electrode 218a and the first active member 216a electrically connect, and the second pixel electrode 218b and the second active member 216b electrically connect.In other words, the first pixel electrode 218a can receive data-signal on the data line 214 by the first active member 216a, and the second pixel electrode 218b then can receive data-signal on the data line 214 by the second active member 216b.
If each pixel electrode be by a data line driving when receiving the data-signal of online data, when the bar number of data line more for a long time, just high more in order to data-signal to be provided to the cost of the source electrode driving device of data line.From the above, in the present embodiment, data line 214 can drive the first pixel electrode 218a and the second pixel electrode 218b in the pixel groups 210, and this measure helps to reduce the cost of source electrode driving device.
In the present embodiment, the first shared electrode wire 220a is positioned at first pixel electrode 218a below, and the second shared electrode wire 220b is positioned at second pixel electrode 218b below, and wherein the first shared electrode wire 220a and the second shared electrode wire 220b are made of the first metal layer.The formed first storage capacitors C between the first shared electrode wire 220a and the first pixel electrode 218a
St1Help to keep the magnitude of voltage on the first pixel electrode 218a, and the formed second storage capacitors C between the second shared electrode wire 220b and the second pixel electrode 218b
St2Then help to keep the magnitude of voltage on the second pixel electrode 218b.
In addition, in the present embodiment, a plurality of first 224a of branch that the first shared electrode wire 220a further comprises one first common lines 222a and is connected with the first common lines 222a, and a plurality of second 224b of branch that the second shared electrode wire 220b further comprises one second common lines 222b and is connected with the second common lines 222b.Wherein, the substantially parallel first sweep trace 212a of the first common lines 222a is provided with, and the vertical first common lines 222a of first 224a of branch; The substantially parallel second sweep trace 212b of the second common lines 222b is provided with, and the vertical second common lines 222b of second 224b of branch.In the present embodiment, first 224a of branch and the first pixel electrode 218a overlap but do not overlap with the second pixel electrode 218b, and second 224b of branch and the second pixel electrode 218b overlap but do not overlap with the first pixel electrode 218a.
What deserves to be mentioned is that in the present embodiment, the A1 of first 224a of branch and first pixel electrode 218a zone overlaps with the A2 zone, this measure can avoid A1 zone and A2 zone that the situation of light leak takes place.In like manner can know by inference, second 224b of branch also can avoid the light leakage phenomena in A3 zone and A4 zone.
When the sweep signal on the first sweep trace 212a was opened the first active member 216a, data line 214 can be to the first pixel electrode 218a operation of charging, and made the first pixel electrode 218a be received data-signal on the data line 214 between charge period.Then, the sweep signal on the first sweep trace 212a can make the first active member 216a close, with the complete charge operation.In theory, between charge period later before the first active member 216a opens next time, the first storage capacitors C
St1Can make the magnitude of voltage of the first pixel electrode 218a maintain the pairing magnitude of voltage of data-signal.Yet in the moment that the first active member 216a closes, sweep signal can make the phenomenon of the voltage generation voltage coupling of the first pixel electrode 218a, and the magnitude of voltage of the first pixel electrode 218a is descended a little.
On the other hand, the second active member 216b of present embodiment electrically connects with data line 214 by the first active member 216a, in other words, when the first active member 216a and the second active member 216b opened simultaneously, data line 214 could charge to the second pixel electrode 218b.In addition, close the first active member 216a in during if recharge here, then the first sweep trace 212a can make the voltage of the first pixel electrode 218a and the second pixel electrode 218b that the phenomenon of voltage coupling takes place in the moment of closing the first active member 216a, and the magnitude of voltage of the first pixel electrode 218a and the second pixel electrode 218b is all descended a little.Then, the second active member 216b closes to finish between this charge period.In theory, between charge period later before the second pixel electrode 218b charges next time, the second storage capacitors C
St2Maintain the pairing magnitude of voltage of data-signal at the magnitude of voltage that can make the second pixel electrode 218b.Yet in the moment that the second active member 216b closes, sweep signal also can make the phenomenon of the voltage generation voltage coupling of the second pixel electrode 218b, and the magnitude of voltage of the second pixel electrode 218b is descended a little.
From the above, the situation that the primary voltage value descends only takes place in the moment of closing the first active member 216a in the magnitude of voltage of the first pixel electrode 218a, but the second pixel electrode 218b then in the moment of closing the first active member 216a and closing the second active member 216b situation that twice magnitude of voltage descends takes place altogether respectively.In other words, the first pixel electrode 218a and the second pixel electrode 218b are after finishing charging, both magnitudes of voltage are inequality, and then make voltage difference between the first pixel electrode 218a and the first shared electrode wire 220a be different from voltage difference between the second pixel electrode 218b and the second shared electrode wire 220b.For addressing the above problem, present embodiment reduces by the voltage quasi position of the second shared electrode wire 220b in the moment that begins the second pixel electrode 218b is charged.After the end to be charged, though the magnitude of voltage on the second pixel electrode 218b still is subjected to the influence of the first active member 216a and the second active member 216b and descends, the voltage differential loss between the second pixel electrode 218b and the second shared electrode wire 220b presses down problem and has obtained significantly to improve.
Hold above-mentionedly, and it is shown in Figure 3 to arrange in pairs or groups, and in the present embodiment, the first shared electrode wire 220a is electrically connected to a direct current power supply V
DCAnd the second shared electrode wire 220b is electrically connected to an AC power V
ACNext, the driving method of the pixel groups 210 of present embodiment is described with signal waveform again.
Fig. 4 illustrates the drive waveforms figure of the pixel groups of one embodiment of the invention, and wherein DS, G1, G2, PA, PD, AC and DC represent the data signal waveforms, the sweep signal waveform on the second sweep trace 212b, the sweep signal waveform on the first sweep trace 212a, the voltage waveform of the second pixel electrode 218b, voltage waveform, the alternating voltage waveform on the second shared electrode wire 220b and the DC voltage waveform on the first shared electrode wire 220a of the first pixel electrode 218a on the data line 214 respectively.Please refer to Fig. 4, in the present embodiment, the dc voltage value on the first shared electrode wire 220a for example is 3.30 volts.Relation between other signal waveform below is described again.
When time t1, the sweep signal on the first sweep trace 212a and the second sweep trace 212b can make the first active member 216a and the second active member 216b open respectively.At this moment, the AC signal waveform AC on the second shared electrode wire 220b can be from high levle VH transition to low level VL, and data line 214 begins the first pixel electrode 218a and the second pixel electrode 218b are charged into electric charge.Wherein, high levle VH for example is 3.60 volts, and low level VL for example is 2.65 volts.So, between charge period, the second pixel electrode 218b estimates that the target voltage values reach is the pairing magnitude of voltage of data-signal, and the voltage difference between the second pixel electrode 218b and the second shared electrode wire 220b also promotes and is the voltage difference between pairing magnitude of voltage of data-signal and the low level VL.
Then, when time t2, the sweep signal on the second sweep trace 212b can make the second active member 216b close, and 214 couples second pixel electrode 218b charge into electric charge with the end data line.At this moment, the waveform of the AC signal on the second shared electrode wire 220b can be from low level VL transition to high levle HL.According to principle of charge conservation, after the second active member 216b closed, the voltage difference between pairing magnitude of voltage of data-signal and the low level VL ought to be constant.So, the high levle HL of the AC signal on the second shared electrode wire 220b can impel the magnitude of voltage of the second pixel electrode 218b to promote, and the situation that the second active member 216b can make the magnitude of voltage on the second pixel electrode 218b descend a little in the moment of closing (time t2) just obtains compensation.
In a preferred embodiment, when the low level VL and the concussion scope between the high levle VH of the alternating voltage on the first shared electrode wire 220a is-10 volts to 10 volts, when being preferably 2.3 volts to 3.7 volts, the magnitude of voltage on the second pixel electrode 218b can obtain preferable compensation effect.Yet the numerical value of above-mentioned low level VL and high levle VL is only in order to illustrating present embodiment, and the setting of the alternating voltage on the first shared electrode wire 220a must be decided on the demand of product.In other words, in the present invention, the size of the alternating voltage on the first shared electrode wire 220a is adjustable for example.
Fig. 5 illustrates the synoptic diagram of the display panel of one embodiment of the invention.Please refer to Fig. 5, the display panel 500 of present embodiment comprises a substrate 300, another substrate 400 and a display medium 350.Substrate 400 is positioned at the subtend of substrate 300, and display medium 350 is between substrate 300 and substrate 400.Please comprise on the substrate 300 being provided with a pel array 200 that wherein pel array 200 comprises a plurality of pixel groups 210 simultaneously with reference to Fig. 2 and Fig. 5.In general, substrate 400 has one usually and shares electrode (not illustrating), is example with liquid crystal as display medium 350, and the voltage difference between first, second pixel electrode 220a, 220b and the shared electrode can determine the arrangement of liquid crystal molecule, so that display panel 500 carries out the demonstration of picture.Yet other topological design of pel array 200 and pixel groups 210 thereof and related description can be with reference to the illustrating of figure 2~Fig. 4, at this repeated description not.
As shown in Figure 5, the display panel 500 of present embodiment also comprises at least one first main line 510 and at least one second main line 520, and wherein Fig. 5 only illustrates two first main lines 510 and two second main lines 520 are example.Please be simultaneously with reference to Fig. 2 and Fig. 5 in the present embodiment, first main line 510 is configured in the edge of substrate 300, and second main line 520 is configured in the edge of substrate 300.Specifically, be viewing area 502 at this pel array 200 that defines display panel 500, and the part outside the viewing area 502 is perimeter circuit district 504.Wherein, the edge of perimeter circuit district 504 close substrate 300 for viewing area 502, and first main line 510 of present embodiment and second main line 520 just are arranged near in the perimeter circuit district 504 at substrate 300 edges.Wherein, sweep signal and the data-signal on the data line 214 on first, second sweep trace 212a, the 212b in the viewing area 502 can be provided by perimeter circuit district 504.
Hold above-mentionedly, in the present embodiment, first main line 510 and the first shared electrode wire 220a electrically connect, and first main line 510 and direct supply V
DCElectrically connect; Second main line 520 and the second shared electrode wire 220b electrically connect, and second main line 520 and AC power V
ACElectrically connect.In other words, in pixel groups 210, the first shared electrode wire 220a can by first main line 510 and with direct supply V
DCElectrically connect, the second shared electrode wire 220b then can be by second main line 520 and with AC power V
ACElectrically connect.
In the present embodiment, the first shared electrode wire 220a and the second shared electrode wire 220b belong to same rete (for example the first metal layer), and first main line 510 and second main line 520 are to belong to another rete (for example second metal level), wherein first, second shared electrode wire 220a, the 220b of identical rete do not contact each other, and first, second main line 510,520 of identical rete does not contact each other yet.Yet in other embodiments, first main line 510 and the first shared electrode wire 220a also can belong to same rete, and second main line 520 and the second shared electrode wire 220b belong to another rete.Perhaps, first main line 510, the first shared electrode wire 220a and the second shared electrode wire 220b belong to same rete, and wherein first, second shared electrode wire 220a, the 220b of identical rete do not contact each other, and second main line 520 belongs to another rete.In brief, the rete of first main line 510, second main line 520, the first shared electrode wire 220a and the second shared electrode wire 220b should be decided on actual product, and the rete that the present invention does not limit these circuits why.
In addition, according to another embodiment of the present invention, the design of pixel groups can also be as shown in Figure 6.In Fig. 6, pixel groups 610 is similar with the pixel groups 210 of Fig. 2, only the two difference is: the arrangement mode of pixel groups 610 is rounded projections arranged (delta type), and wherein the composition member of pixel groups 610 and pixel groups 210 are similar, are not described at this.In addition, the pixel groups of different arrangement modes does not influence the invention spirit of desire explaination of the present invention.In other words, pixel groups can also present other arrangement mode, and the present invention does not limit.
Save after the use amount and cost of drive unit, can also promote the display quality of display frame.
Both designs of display panel of the present invention and pel array thereof can be saved the use amount and the cost of drive unit.In addition, each pixel groups in the pel array comprises two shared electrode wire, and the method for the driving pel array of the present invention of arranging in pairs or groups, so that these two shared electrode wire receive DC voltage and alternating voltage respectively, wherein share online alternating voltage and help to improve the bad picture that two voltage coupling effects between the active member are produced.Yet, this bad picture be because each pixel groups in two pixel electrodes on recalcitrate voltage (
) different, so that pixel groups has two kinds of different current potentials, and then make these two pixel electrodes show different brightness.In brief, the present invention can also promote the display quality of display frame after the use amount and cost of saving drive unit.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.