CN102081896B - Source electrode driver, display unit and method for driving display panel - Google Patents
Source electrode driver, display unit and method for driving display panel Download PDFInfo
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- CN102081896B CN102081896B CN 200910224934 CN200910224934A CN102081896B CN 102081896 B CN102081896 B CN 102081896B CN 200910224934 CN200910224934 CN 200910224934 CN 200910224934 A CN200910224934 A CN 200910224934A CN 102081896 B CN102081896 B CN 102081896B
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Abstract
The invention relates to a source electrode driver which comprises a controller and a plurality of buffers, wherein the controller discriminate the polarity change order of a plurality of grey scale voltages transmitted by a plurality of output channels of the source electrode driver and switches the level of a first offset control signal according to the discrimination result, and also discriminates the arrangement mode of pixels in a display panel according to an indicator signal to determine whether to reversely switch the level of the first offset control signal or not and further generate a second offset control signal accordingly; and the buffers change the generation order of a positive offset voltage and a negative offset voltage according to the second offset control signal, and buffer the grey scale voltages for driving the display panel under the condition of the generation of the positive offset voltage or the negative offset voltage.
Description
Technical field
The present invention relates to the driving method of a kind of source electrode driver, display device and display panel, and particularly relate to the driving method of a kind of source electrode driver that utilizes indicator signal to differentiate the arrangement mode of pixel in the display panel, display device and display panel.
Background technology
In the driving chip of liquid crystal display (1iquid crystal display), source electrode driver (sourcedriver) is responsible for converting the image data of numeral to corresponding gray scale voltage, and is come display panel is driven by the impact damper (buffer) of afterbody.Often there is the problem of offset voltage (offset voltage) in impact damper under the impact of processing procedure drift.The impact that gray scale voltage is caused in order to eliminate offset voltage, a kind of method are to utilize to have sequentially to produce positive offset voltage and negative bias and move in the voltage vision with human eye.
Figure 1A is that conventional display panel is at the structural representation that carries out 2 counter-rotatings (2-dot inversion).Shown in Figure 1A, the pixel in the display panel 110 presents line spread, is respectively applied to transmit red (R), green (G) gray scale voltage required with blue (B) pixel therefore drive channel C H11～CH13.Source electrode driver 120 comprises a plurality of impact damper 121a～121d and a plurality of multiplexer 122a～122b.Driving on the mechanism of display panel, per 2 pixels are that the polarity of voltage with adjacent up and down four group's pixels is opposite each other respectively for a group group.In addition, in the process of sequentially opening each row pixel, owing to driving channel C H11～CH13 after transmitting two gray scale voltages, the polarity of next record gray scale voltage just can produce counter-rotating, therefore source electrode driver 120 can be with offset control signal S
CT1Switch to the first level (for example logical one).At this moment, impact damper 121a～121d is with reference to the offset control signal S with first level
CT1, and in the situation that alternately produce positive offset voltage and negative bias and move voltage and cushion gray scale voltage.
Take the first row red pixel as example, by the switching of multiplexer 122a, impact damper 121a can produce positive offset voltage+V
A11Situation under the output cathode gray scale voltage to red pixel 111,
And move voltage-V producing negative bias
A11Situation under the output cathode gray scale voltage to red pixel 112.Afterwards, impact damper 121b can produce positive offset voltage+V
B11Situation under the output negative pole gray scale voltage to red pixel 113, and move voltage-V producing negative bias
B11Situation under the output negative pole gray scale voltage to red pixel 114.At this, positive offset voltage+V that impact damper 121a produces
A11Move voltage-V with negative bias
A11For the impact that red pixel causes, can improve via the colour mixture of human vision offset voltage to the impact of display panel 120 when the imaging.Relatively, the offset voltage that produces of impact damper 121b also can be improved.
On the other hand, Figure 1B is that conventional display panel is at the structural representation that carries out single-point counter-rotating (1-dot inversion).As shown in Figure 1B, when source electrode driver 120 is that display panel 110 is carried out single-point when counter-rotating, drive channel C H11～CH13 behind 1 gray scale voltage of every transmission, the polarity of next record gray scale voltage just can produce counter-rotating, therefore offset control signal S
CT1To be switched to second electrical level (for example logical zero).At this moment, impact damper 121a～121d can be after repeating to produce positive offset voltage or negative bias and moving voltage, produces in the situation that negative bias moves voltage or positive offset voltage again and cushion gray scale voltage.Whereby, concerning the first row red pixel, red pixel 111～114 received gray scale voltages can be subject to respectively offset voltage+V
A11,+V
B11,-V
A11And-V
B11Impact.Similarly, positive offset voltage+V of producing of impact damper 121a
A11Move voltage-V with negative bias
A11For the impact that red pixel causes, can improve via the colour mixture of human vision offset voltage to the impact of display panel 120 when the imaging.
Yet, when source electrode driver 120 is to be used to drive when being staggered the display panel of Pixel Design technology (ZigzagPixel Design), shown in Fig. 1 C, pixel 131～138th in the display panel 130 presents Z-shaped and arranges, therefore the driving channel C H12 of source electrode driver 120 is for transmitting pixel 135,132,137,134 required gray scale voltages.At this, source electrode driver 120 is drivings of display panel 130 being carried out the single-point counter-rotating.But because the gray scale voltage that the driving channel C H11～CH13 of source electrode driver 120 transmits separately all belongs to same polarity, therefore offset control signal S
CT1To be switched to the first level (for example logical one).At this moment, impact damper 121a～121d will be in the situation that alternately produce positive offset voltage and negative bias and move voltage and cushion gray scale voltage.Therefore, green pixel 135 and red pixel 132 received gray scale voltages will be subject to respectively positive offset voltage+V of impact damper 121b
B11Move voltage-V with negative bias
B11Impact, and can't improve by colour mixture.In other words, traditional source electrode driver 120 can't be applied in the display panel of the Pixel Design technology that is staggered.
Summary of the invention
The invention provides a kind of source electrode driver, applicable to the display panel of routine or the display panel that designs with the pixel technique that is staggered.
The invention provides a kind of display device, its source electrode driver that possesses can utilize an indicator signal to come the arrangement mode of pixel in the identification display panel, so that the display panel in the display device can utilize routine techniques or the pixel technique that is staggered to be realized.
The invention provides a kind of driving method of display panel, can be used for driving conventional display panel or the display panel that designs with the pixel technique that is staggered.
The present invention proposes a kind of source electrode driver, have a plurality of driving passages driving a display panel, and described source electrode driver comprises a controller and a plurality of impact damper.Wherein, controller is differentiated the reversing order that these drive a plurality of gray scale voltages that passages transmit according to a polarity control signal, and switches to one first level or a second electrical level according to differentiating the level of result with one first offset control signal.In addition, controller is also differentiated the arrangement mode of pixel in the display panel according to an indicator signal, the level of the first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal.On the other hand, these impact dampers can be changed generation that a positive offset voltage and a negative bias move voltage sequentially according to second offset control signal, and in the situation that the positive offset voltage of generation or negative bias move a plurality of gray scale voltages of voltage buffering, wherein these gray scale voltages are used for driving display panel, in when the level of this second offset control signal is this first level, these a plurality of impact dampers can be after repeating to produce this positive offset voltage or this negative bias and moving voltage, produce again these a plurality of gray scale voltages of buffering in the situation that this negative bias moves voltage or this positive offset voltage, when the level of this second offset control signal is this second electrical level, these a plurality of impact dampers can move these a plurality of gray scale voltages of voltage buffering in the situation that alternately produce this positive offset voltage and this negative bias, wherein when the arrangement mode of pixel in this display panel is line spread, this indicator signal is set to one first and sets level, so that this controller does not reverse to the level of this first offset control signal of switching, when the arrangement mode of pixel in this display panel is the Z-shaped arrangement, this indicator signal is set to one second and sets level, so that this controller reverses to the level of this first offset control signal of switching.
In one embodiment of this invention, an external pins of above-mentioned source electrode driver is used for setting described indicator signal.
The present invention proposes a kind of display device in addition, comprises a display panel and above-mentioned source electrode driver.Wherein, source electrode driver has a plurality of driving passages, to drive display panel.
From another viewpoint, the present invention proposes again a kind of driving method of display panel, and comprise the following steps: to differentiate according to a polarity control signal reversing order of a plurality of gray scale voltages that a plurality of driving passages of one source pole driver transmit, and switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal; Differentiate the arrangement mode of pixel in the display panel according to an indicator signal, the level of the first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal; The order that a plurality of buffer generating one positive offset voltages and a negative bias move voltage in foundation the second offset control signal change source electrode driver is so that these impact dampers are in the situation that the positive offset voltage of generation or negative bias move a plurality of gray scale voltages of voltage buffering; And, utilize these gray scale voltages to drive display panel,
Wherein change the order that this positive offset voltage of these a plurality of buffer generating and this negative bias move voltage in this source electrode driver according to this second offset control signal, so that these a plurality of impact dampers are in the situation that produce this positive offset voltage or step that this negative bias moves these a plurality of gray scale voltages of voltage buffering comprises: when the level of this second offset control signal during for this first level, these a plurality of impact dampers can be after repeating to produce this positive offset voltage or this negative bias and moving voltage, produces in the situation that this negative bias moves voltage or this positive offset voltage again and cushion these a plurality of gray scale voltages; And when the level of this second offset control signal was this second electrical level, these a plurality of impact dampers can move these a plurality of gray scale voltages of voltage buffering in the situation that alternately produce this positive offset voltage and this negative bias; Wherein differentiate the arrangement mode of pixel in this display panel according to this indicator signal, the level of this first offset control signal of switching to determine whether to reverse, and the step that produces according to this this second offset control signal comprises: when the arrangement mode of pixel in this display panel is line spread, this indicator signal is set to one first and sets level, so that the level of this first offset control signal of switching is not reversed; And when the arrangement mode of pixel in this display panel be Z-shaped when arranging, this indicator signal is set to one second and sets level, so that the level of this first offset control signal of switching is reversed.
The present invention utilizes an indicator signal to differentiate whether the first offset control signal of having switched to be carried out the conversion of level, and produces according to this second offset control signal.Whereby, be controlled by the impact damper of the second offset control signal, it produces the order that positive offset voltage and negative bias move voltage, will be applicable to the display panel of routine or the display panel that designs with the pixel technique that is staggered.Thus, compared to the prior art, source electrode driver of the present invention can be widely used in all types of display device.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperation accompanying drawing are described in detail below.
Description of drawings
Figure 1A is that conventional display panel is at the structural representation that carries out 2 counter-rotatings (2-dot inversion).
Figure 1B is that conventional display panel is at the structural representation that carries out single-point counter-rotating (1-dot inversion).
Fig. 1 C is that the be staggered display panel of Pixel Design is carrying out the structural representation of single-point counter-rotating.
Fig. 2 is the configuration diagram according to the display device of first embodiment of the invention.
Fig. 3 is the configuration diagram according to the display device of second embodiment of the invention.
Fig. 4 is the configuration diagram according to the display device of third embodiment of the invention.
Fig. 5 is the structural representation according to the source electrode driver of another embodiment of the present invention.
Fig. 6 is the driving method process flow diagram according to the display panel of fourth embodiment of the invention.
[main element symbol description]
110,130: display panel
111～114,131～138: pixel
120: source electrode driver
121a～121d: impact damper
122a～122b: multiplexer
CH11～CH13: drive passage
SCT1: offset control signal
+ V
A11,-V
A11,+V
B11,-V
B11: offset voltage
200,300,400: display device
210,410: display panel
211～218,411～418: pixel
DL4: data line
220,500: source electrode driver
221a～221d, 521a～521d: impact damper
222a～222b, 522a～522b: multiplexer
223,523: controller
CH21～CH24, CH51～CH54: drive passage
PIN2, PIN5: external pins
+ V
DR: the positive polarity gray scale voltage
-V
DR: the negative polarity gray scale voltage
S
ID2, S
ID5: indicator signal
P
OL2, P '
OL2, P
OL5: polarity control signal
S
CT2, S
CT5: the second offset control signal
+ V
A21,-V
A21,+V
B21,-V
B21: offset voltage
S610～S640: each steps flow chart that is used for key diagram 6 embodiment
Embodiment
In the following description, in order to present the consistance to explanation of the present invention, in different embodiment, if there is the same or analogous element of function and structure to use identical component symbol and title.
[the first embodiment]
Fig. 2 is the configuration diagram according to the display device of first embodiment of the invention.With reference to Fig. 2, display device 200 comprises a display panel 210 and one source pole driver 220.Wherein, display panel 210 comprises a plurality of pixels, for example: the pixel 211～218 that Fig. 2 indicates.220 of source electrode drivers comprise a controller 223, a plurality of impact damper and a plurality of multiplexer, for example: impact damper 221a～221d that Fig. 2 indicates and multiplexer 222a～222b.In addition, source electrode driver 220 has a plurality of driving passages, for example: driving channel C H21～CH24 that Fig. 2 indicates.Member obviously operation of showing device 200 as example that below will above label be arranged in the diagram.
In the present embodiment, multiplexer 222a～222b is electrically connected at impact damper 221a～221d and drives between channel C H21～CH24.Odd number impact damper 221a and 221c are used for buffering positive polarity gray scale voltage+V
DR, even number impact damper 221b and 221d then are used for buffering negative polarity gray scale voltage-V
DRIn addition, multiplexer 222a～222b is used for cooperating the inversion mechanism of display panel 210 to switch gray scale voltage (positive polarity gray scale voltage+V that impact damper 221a～221d exports
DRWith negative polarity gray scale voltage-V
DR).
For instance, describe as an example of the described conventional display panel of the present embodiment example.At this, the pixel in the display panel 210 presents line spread, is respectively applied to transmit red (R), green (G) gray scale voltage required with blue (B) pixel therefore drive channel C H21～CH23.In addition, per two impact dampers are multiplexer of group collocation, so that the required positive polarity gray scale voltage of pixel and negative polarity gray scale voltage to be provided alternately.For example: impact damper 221a and impact damper 221b share multiplexer 222a.Whereby, the required gray scale voltage of first row red pixel and secondary series green pixel can be provided by impact damper 221a and impact damper 221b.
Further, the source electrode driver 220 of the present embodiment is that mode with single-point counter-rotating (1-dotinversion) drives display panel 210.Each pixel is opposite each other with the polarity of adjacent up and down four pixels in the display panel 210.In addition, source electrode driver 220 is in the process that produces gray scale voltage, and controller 223 can be according to a polarity control signal P
OL2And predict first the reversing order that each drives the gray scale voltage that channel C H21～CH22 transmits, to switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal.For instance, because source electrode driver 220 is to reverse to drive display panel 210 with single-point, therefore after driving 1 gray scale voltage of the every transmission of channel C H21～CH24, the polarity of next record gray scale voltage will produce counter-rotating.At this moment, controller 223 can be with reference to polarity control signal P
OL2Be the relevant information of alternately switching and obtain the polarity that drives the gray scale voltage that channel C H21～CH24 transmits, and then the level of the first offset control signal (for example: logical one) is switched to the first level.
Moreover controller 223 is also according to an indicator signal S
ID2Differentiate the arrangement mode of pixel in the display panel 210, the level of the first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal S
CT2Wherein, indicator signal S
ID2Can set by an external pins PIN2 of source electrode driver 220.For instance, because the described display panel 210 of the present embodiment is conventional display panel, namely the arrangement mode of pixel is to present line spread take data line as benchmark in the display panel 210, therefore indicator signal S
ID2Be set to one first by external pins PIN2 and (for example: logical one) set level.Whereby, controller 223 can be according to the indicator signal S with first setting level
ID2, and determine the first offset control signal with first level not to be reversed, and produce according to this second offset control signal S
CT2That is to say the second offset control signal S of this moment
CT2(for example: logical one) will maintain the first level.
On the other hand, impact damper 221a～221d then is in the situation that produce positive offset voltage or negative bias and move voltage and cushion gray scale voltage, and its to produce the order that positive offset voltage or negative bias move voltage be according to one second offset control signal S
CT2Change.For instance, in this enforcement, because the second offset control signal S
CT2Level be (for example: logical one) to maintain the first level.Accordingly, impact damper 221a～221d will be after repeating to produce positive offset voltage or negative bias and moving voltage, produces in the situation that negative bias moves voltage or positive offset voltage again and cushion gray scale voltage.That is to say, impact damper 221a～221d can be after producing 2 offset voltages, again the polarity of transition deviation voltage.
Take first row red pixel and secondary series green pixel as example, by the switching of multiplexer 222a, impact damper 221a can repeat to produce positive offset voltage+V
A21Situation under, the required positive polarity gray scale voltage+V of output red pixel 211 and green pixel 216 sequentially
DRRelatively, impact damper 221b can repeat to produce positive offset voltage+V
B21Situation under, sequentially export the required negative polarity gray scale voltage-V of green pixel 215 and red pixel 212
DRAfterwards, impact damper 221a can move voltage-V repeating to produce negative bias
A21Situation under, the required positive polarity gray scale voltage+V of output red pixel 213 and green pixel 218 sequentially
DRRelatively, impact damper 221b can move voltage-V repeating to produce negative bias
B21Situation under, sequentially export the required negative polarity gray scale voltage-V of green pixel 217 and red pixel 214
DR
Concerning the first row red pixel, the received gray scale voltage in red pixel 211～～214 can be subject to respectively offset voltage+V
A21,+V
B21,-V
A21And-V
B21Impact.Yet, positive offset voltage+V that impact damper 221a produces
A21Move voltage-V with negative bias
A21For the aberration that red pixel causes, can be revised via colour mixture.In addition, positive offset voltage+V of producing of impact damper 221b
B21Move voltage-V with negative bias
B21For the aberration that red pixel causes, also can be revised via colour mixture.In other words, the offset voltage of impact damper will be improved on the impact that display panel causes when the imaging.
[the second embodiment]
Fig. 3 is the configuration diagram according to the display device of second embodiment of the invention.Please refer to Fig. 3, the present embodiment and the first embodiment are roughly the same, and same or analogous element numbers represents same or analogous element among Fig. 3, just repeats no more in the present embodiment.
The main difference of the present embodiment and the first embodiment is: in the described display device 300 of the present embodiment, source electrode driver 220 is that the mode with 2 counter-rotatings (2-dot inversion) drives display panel 210.Therefore, in the present embodiment, controller 223 can be according to different polarity control signal P '
OL2, and after precognition drove channel C H21～CH24 and is 2 gray scale voltages of every transmission first, the polarity of next record gray scale voltage just can produce counter-rotating.At this moment, controller 223 will (for example: logical zero) switch to second electrical level to the level of the first offset control signal.
On the other hand, because the indicator signal S of this moment
ID2Also be to be set at first (for example: logical one), therefore controller 223 can not reverse to the first offset control signal with second electrical level, and produce according to this second offset control signal S to set level
CT2That is to say, the second offset control signal SCT2 of this moment (for example: logical zero) will maintain second electrical level.Accordingly, impact damper 221
a～221d will be in the situation that alternately produce positive offset voltage and negative bias and move voltage and cushion gray scale voltage.
For instance, take the first row red pixel as example, by the switching of multiplexer 222a, impact damper 221a can produce positive offset voltage+V
A21Situation under output cathode gray scale voltage+V
DRTo red pixel 211, and move voltage-V producing negative bias
A21Situation under output cathode gray scale voltage+V
DRTo red pixel 212.Afterwards, impact damper 221b can produce positive offset voltage+V
B21Situation under output negative pole gray scale voltage-V
DRTo red pixel 213, and move voltage-V producing negative bias
B21Situation under output negative pole gray scale voltage-V
DRTo red pixel 214.Thus, positive offset voltage+V of producing of impact damper 221a
A21Move voltage-V with negative bias
A21For the aberration that red pixel causes, can be revised via colour mixture.In addition, positive offset voltage+V of producing of impact damper 221b
B21Move voltage-V with negative bias
B21For the aberration that red pixel causes, also can be revised via colour mixture.
[the 3rd embodiment]
Fig. 4 is the configuration diagram according to the display device of third embodiment of the invention.Please refer to Fig. 4, the present embodiment and the first embodiment are roughly the same, and same or analogous element numbers represents same or analogous element among Fig. 4, just repeats no more in the present embodiment.
The main difference of the present embodiment and the first embodiment is: in the described display device 400 of the present embodiment, source electrode driver 220 is for the be staggered display panel 410 of Pixel Design technology (ZigzagPixel Design) of driving.Therefore, as shown in Figure 4, the pixel 411～418th in the display panel 410 presents Z-shaped and arranges take data line as benchmark, and for example: pixel 415,412,417,414 presents Z-shaped and arranges take data line DL4 as benchmark.Relatively, the driving channel C H22 of source electrode driver 220 is for transmitting pixel 415,412,417,414 required gray scale voltages.
At this, because the pixel 411～418th in the display panel 410 presents Z-shaped and arranges, therefore in the present embodiment, controller 223 meetings are according to polarity control signal P "
OL2And the gray scale voltage that first precognition driving channel C H21～CH23 transmits separately all belongs to same polarity, and judge that accordingly driving channel C H21～CH23 can repeat to transmit the gray scale voltage of identical polar, and the level of the first offset control signal (for example: logical zero) is switched to second electrical level.
On the other hand, also because the pixel 411～418th in the display panel 410 presents the Z-shaped arrangement, therefore in the present embodiment, indicator signal S
ID2Can be set to one second by external pins PIN2 and (for example: logical zero) set level.At this moment, controller 223 will be according to the indicator signal S with second setting level
ID2, and the first offset control signal with second electrical level is reversed, and then produce the second offset control signal S
CT2That is to say the second offset control signal S of this moment
CT2(for example: logical one) will maintain the first level.Thus, impact damper 221a～221d will be in the situation that alternately produce positive offset voltage and negative bias and move voltage and cushion gray scale voltage.
For instance, with the gray scale voltage that impact damper 221b is exported, impact damper 221b can produce positive offset voltage+V
B21Situation under output negative pole gray scale voltage-V
DRTo green pixel 415, and move voltage-V producing negative bias
B21Situation under output negative pole gray scale voltage-V
DRTo red pixel 412.Afterwards, impact damper 221b can produce positive offset voltage+V
B21Situation under output negative pole gray scale voltage-V
DRTo green pixel 417, and move voltage-V producing negative bias
B21Situation under output negative pole gray scale voltage-V
DRTo red pixel 414.
That is to say, the gray scale voltage that green pixel 415, red pixel 412, green pixel 417, red pixel 414 are received is with the offset voltage+V that is subject to respectively impact damper 221b and produces
B21,+V
B21,-V
B21And-V
B21Impact.Whereby, positive offset voltage+V
B21Move voltage-V with negative bias
B21For the aberration that green pixel 415 and 417 causes, can be revised via colour mixture.In addition, positive offset voltage+V
B21Move voltage-V with negative bias
B21For the aberration that red pixel 412 and 414 causes, also can be revised via colour mixture.
It is worth mentioning that, take a broad view of the first to the 3rd embodiment, can learn, aforementioned source electrode driver 220 can be applicable to conventional display panel or the display panel that designs with the pixel technique that is staggered.Therefore, aforementioned source electrode driver 220 can be widely used in all types of display device.In addition, although aforementioned each embodiment has enumerated the corresponding configuration relation of multiplexer and impact damper in the source electrode driver 220, yet those skilled in the art can change according to design the enforcement kenel of multiplexer and impact damper.
For instance, Fig. 5 is the structural representation according to the source electrode driver of another embodiment of the present invention.With reference to Fig. 5, source electrode driver 500 comprises a plurality of impact damper 521a～521d, a plurality of multiplexer 522a～522b and a controller 523.Fig. 5 embodiment and aforementioned source electrode driver 220 similarities are, source electrode driver 500 has a plurality of driving channel C H51～CH54, to drive conventional display panel or the display panel that designs with the pixel technique that is staggered.In addition, in the process that drives display panel, controller 523 can be first according to polarity control signal P
OL5Switch the level of the first offset control signal, afterwards again according to indicator signal S
ID5The level of the first offset control signal of switching that determines whether reversing, and produce accordingly the second offset control signal S
CT5Wherein, indicator signal S
ID5Can set by an external pins PIN5 of source electrode driver 500.
On the other hand, Fig. 5 embodiment and aforementioned source electrode driver 220 main difference parts are, multiplexer 522a～522b is the input end that is electrically connected to impact damper 521a～521d.Therefore, Fig. 5 embodiment switches the gray scale voltage that is used for driving display panel by multiplexer 522a～522b first, sends afterwards impact damper 521a～521d to again.Wherein, multiplexer 522a～522b cooperates the inversion mechanism of display panel to switch gray scale voltage.Impact damper 521a～521d changes the generation order that its inner positive offset voltage and negative bias move voltage according to the second offset control signal, and cushions gray scale voltage in the situation that the positive offset voltage of generation or negative bias move voltage.
It should be noted that because impact damper 521a～521d is responsible for a certain specific driving passage separately, therefore impact damper 521a～521d can be used for cushioning positive polarity gray scale voltage or negative polarity gray scale voltage.In addition, the described impact damper 521a～521d of aforementioned buffers 221a～221d and Fig. 5 embodiment can utilize a chopper stabilization type operational amplifier (Chopper Stabilization Operational Amplifier) to consist of to produce the characteristic that positive offset voltage or negative bias move voltage.Yet those skilled in the art can change according to design the enforcement kenel of impact damper 221a～221d and impact damper 521a～521d.
[the 4th embodiment]
Fig. 6 is the driving method process flow diagram according to the display panel of fourth embodiment of the invention.With reference to Fig. 6, shown in step S610, differentiate the reversing order of a plurality of gray scale voltages that a plurality of output channels of one source pole driver transmit according to a polarity control signal, and switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal.Whereby, can obtain the first offset control signal with the first level or second electrical level.
Afterwards, shown in step S620, differentiate the arrangement mode of pixel in the display panel according to an indicator signal, the level of the first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal.That is to say, by step S620, the first offset control signal with the first level or second electrical level may be reversed to the first offset control signal with second electrical level or first level, and the first offset control signal after the counter-rotating will be regarded as the second offset control signal.
After obtaining the second offset control signal, shown in step S630, the order that a plurality of buffer generating one positive offset voltages and a negative bias move voltage in foundation the second offset control signal change source electrode driver is so that these impact dampers are in the situation that the positive offset voltage of generation or negative bias move a plurality of gray scale voltages of voltage buffering.At last, shown in step S640, can utilize these gray scale voltages to drive display panel.Thin section flow process as for the present embodiment has been included among the first to the 3rd embodiment, therefore do not repeat them here.
In sum, the present invention utilizes an indicator signal to differentiate whether the first offset control signal of having switched to be carried out the conversion of level, and produces according to this second offset control signal.Whereby, be controlled by the impact damper of the second offset control signal, it produces the order that positive offset voltage and negative bias move voltage, will be applicable to the display panel of routine or the display panel that designs with the pixel technique that is staggered.Relatively, source electrode driver of the present invention can be widely used in all types of display device.
Although the present invention with preferred embodiment openly as above; yet it is not for limiting the present invention; any the technical staff in the technical field; without departing from the spirit and scope of the present invention; can make some and change and modification, so protection scope of the present invention should be as the criterion with defining of appended claims.
Claims (12)
1. a source electrode driver has a plurality of driving passages, and to drive a display panel, this source electrode driver comprises:
One controller, differentiate the reversing order of a plurality of gray scale voltages that these a plurality of driving passages transmit according to a polarity control signal, to switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal, this controller is also differentiated the arrangement mode of pixel in this display panel according to an indicator signal, the level of this first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal; And
A plurality of impact dampers, change the generation order that a positive offset voltage and a negative bias move voltage according to this second offset control signal, and in the situation that this positive offset voltage of generation or this negative bias move a plurality of gray scale voltages of voltage buffering, wherein these a plurality of gray scale voltages are used for driving this display panel
Wherein when the level of this second offset control signal is this first level, these a plurality of impact dampers can be after repeating to produce this positive offset voltage or this negative bias and moving voltage, produce again these a plurality of gray scale voltages of buffering in the situation that this negative bias moves voltage or this positive offset voltage, when the level of this second offset control signal is this second electrical level, these a plurality of impact dampers can move these a plurality of gray scale voltages of voltage buffering in the situation that alternately produce this positive offset voltage and this negative bias
Wherein when the arrangement mode of pixel in this display panel is line spread, this indicator signal is set to one first and sets level, so that this controller does not reverse to the level of this first offset control signal of switching, when the arrangement mode of pixel in this display panel is the Z-shaped arrangement, this indicator signal is set to one second and sets level, so that this controller reverses to the level of this first offset control signal of switching.
2. source electrode driver as claimed in claim 1, wherein an external pins of this source electrode driver is used for setting this indicator signal.
3. source electrode driver as claimed in claim 1 also comprises:
A plurality of the first multiplexers are electrically connected between these a plurality of impact dampers and this a plurality of driving passages,
And the inversion mechanism that cooperates this display panel switches these a plurality of gray scale voltages that these a plurality of impact dampers are exported,
Wherein, the odd number impact damper in these a plurality of impact dampers is used for the positive polarity gray scale voltage of these a plurality of gray scale voltages of buffering, and the even number impact damper in these a plurality of impact dampers is used for the negative polarity gray scale voltage of these a plurality of gray scale voltages of buffering.
4. source electrode driver as claimed in claim 1 also comprises:
A plurality of the second multiplexers are electrically connected to this a plurality of impact dampers, be used for to cooperate the inversion mechanism of this display panel to switch this a plurality of gray scale voltages, should being sent to this a plurality of impact dampers by a plurality of gray scale voltages,
Wherein, these a plurality of impact dampers are used for positive polarity gray scale voltage or the negative polarity gray scale voltage of these a plurality of gray scale voltages of buffering.
5. display device comprises:
One display panel; And
The one source pole driver has a plurality of driving passages, and driving this display panel, and this source electrode driver comprises:
One controller, differentiate the reversing order of a plurality of gray scale voltages that these a plurality of driving passages transmit according to a polarity control signal, to switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal, this controller is also differentiated the arrangement mode of pixel in this display panel according to an indicator signal, the level of this first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal; And
A plurality of impact dampers, change the generation order that a positive offset voltage and a negative bias move voltage according to this second offset control signal, and in the situation that this positive offset voltage of generation or this negative bias move a plurality of gray scale voltages of voltage buffering, wherein these a plurality of gray scale voltages are used for driving this display panel
Wherein when the level of this second offset control signal is this first level, these a plurality of impact dampers can be after repeating to produce this positive offset voltage or this negative bias and moving voltage, produce again these a plurality of gray scale voltages of buffering in the situation that this negative bias moves voltage or this positive offset voltage, when the level of this second offset control signal is this second electrical level, these a plurality of impact dampers can move these a plurality of gray scale voltages of voltage buffering in the situation that alternately produce this positive offset voltage and this negative bias
Wherein when the arrangement mode of pixel in this display panel is line spread, this indicator signal is set to one first and sets level, so that this controller does not reverse to the level of this first offset control signal of switching, when the arrangement mode of pixel in this display panel is the Z-shaped arrangement, this indicator signal is set to one second and sets level, so that this controller reverses to the level of this first offset control signal of switching.
6. display device as claimed in claim 5, wherein an external pins of this source electrode driver is used for setting this indicator signal.
7. display device as claimed in claim 5, wherein this source electrode driver also comprises:
A plurality of the first multiplexers are electrically connected between these a plurality of impact dampers and this a plurality of driving passages, and cooperate the inversion mechanism of this display panel to switch these a plurality of gray scale voltages that these a plurality of impact dampers are exported,
Wherein, the odd number impact damper in these a plurality of impact dampers is used for the positive polarity gray scale voltage of these a plurality of gray scale voltages of buffering, and the even number impact damper in these a plurality of impact dampers is used for the negative polarity gray scale voltage of these a plurality of gray scale voltages of buffering.
8. display device as claimed in claim 5, wherein this source electrode driver also comprises:
A plurality of the second multiplexers are electrically connected to this a plurality of impact dampers, be used for to cooperate the inversion mechanism of this display panel to switch this a plurality of gray scale voltages, should being sent to this a plurality of impact dampers by a plurality of gray scale voltages,
Wherein, these a plurality of impact dampers are used for positive polarity gray scale voltage or the negative polarity gray scale voltage of these a plurality of gray scale voltages that these a plurality of second multiplexers of buffering export.
9. the driving method of a display panel comprises:
Differentiate the reversing order of a plurality of gray scale voltages that a plurality of driving passages of one source pole driver transmit according to a polarity control signal, and switch to one first level or a second electrical level according to differentiating the level of result with one first offset control signal;
Differentiate the arrangement mode of pixel in this display panel according to an indicator signal, the level of this first offset control signal of switching to determine whether to reverse, and produce according to this one second offset control signal;
Change the order that a plurality of buffer generating one positive offset voltages and a negative bias move voltage in this source electrode driver according to this second offset control signal, so that these a plurality of impact dampers are in the situation that produce this positive offset voltage or this negative bias moves a plurality of gray scale voltages of voltage buffering; And
Utilize these a plurality of gray scale voltages to drive this display panel,
Wherein change the order that this positive offset voltage of these a plurality of buffer generating and this negative bias move voltage in this source electrode driver according to this second offset control signal, so that these a plurality of impact dampers are in the situation that produce this positive offset voltage or step that this negative bias moves these a plurality of gray scale voltages of voltage buffering comprises:
When the level of this second offset control signal was this first level, these a plurality of impact dampers can be after repeating to produce this positive offset voltage or this negative bias and moving voltage, produces in the situation that this negative bias moves voltage or this positive offset voltage again and cushion these a plurality of gray scale voltages; And
When the level of this second offset control signal was this second electrical level, these a plurality of impact dampers can move these a plurality of gray scale voltages of voltage buffering in the situation that alternately produce this positive offset voltage and this negative bias,
Wherein differentiate the arrangement mode of pixel in this display panel according to this indicator signal, the level of this first offset control signal of switching to determine whether to reverse, and the step that produces according to this this second offset control signal comprises:
When the arrangement mode of pixel in this display panel was line spread, this indicator signal was set to one first and sets level, so that the level of this first offset control signal of switching is not reversed; And
When the arrangement mode of pixel in this display panel is Z-shaped when arranging, this indicator signal is set to one second and sets level, so that the level of this first offset control signal of switching is reversed.
10. the driving method of display panel as claimed in claim 9 also comprises:
External pins by this source electrode driver is set this indicator signal.
11. the driving method of display panel as claimed in claim 9 also comprises:
Cooperate the inversion mechanism of this display panel to switch this a plurality of gray scale voltages, being sent to this a plurality of impact dampers by a plurality of gray scale voltages.
12. the driving method of display panel as claimed in claim 9 also comprises:
Cooperate the inversion mechanism of this display panel to switch these a plurality of gray scale voltages that these a plurality of impact dampers are exported.
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| CN105047157B (en) * | 2015-08-19 | 2017-10-24 | 深圳市华星光电技术有限公司 | A kind of source electrode drive circuit |
| CN107886921B (en) * | 2017-12-05 | 2020-07-31 | 深圳市华星光电技术有限公司 | Source driver, method for realizing multi-gray-scale binding voltage combination thereof and driving circuit |
| TWI659404B (en) * | 2018-01-25 | 2019-05-11 | 友達光電股份有限公司 | Display device |
| CN112542122B (en) * | 2020-12-04 | 2022-09-09 | Tcl华星光电技术有限公司 | Display device driving method and display device |
| CN114203085B (en) * | 2021-11-29 | 2023-03-24 | 北京奕斯伟计算技术股份有限公司 | Method for controlling offset voltage in display device, and storage medium |
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| CN101504816A (en) * | 2007-12-28 | 2009-08-12 | 索尼株式会社 | Signal-line driving circuit, display device and electronic equipments |
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| CN101312021A (en) * | 2006-12-19 | 2008-11-26 | 恩益禧电子股份有限公司 | Display device, source driver and method for driving display panel |
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