CN103377623A - A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof - Google Patents
A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof Download PDFInfo
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- CN103377623A CN103377623A CN2012101058621A CN201210105862A CN103377623A CN 103377623 A CN103377623 A CN 103377623A CN 2012101058621 A CN2012101058621 A CN 2012101058621A CN 201210105862 A CN201210105862 A CN 201210105862A CN 103377623 A CN103377623 A CN 103377623A
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Abstract
The invention discloses a source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof. The method comprises: based on the panel categories of display panels in the panel categories of a plurality of display panels, generating polarity control signals corresponding to the panel categories, wherein the plurality of polarity control signals corresponding to the panel categories of the plurality of display panels are different; based on the polarity control signals, generating polarity signals corresponding to the display panels; and based on the polarity signals, generating and outputting the plurality of gamma reference voltages, wherein the plurality of gamma reference voltages comprise a group of positive polarity gamma reference voltages and a group of negative polarity gamma reference voltages and the number of voltages of the group of polarity gamma reference voltages is the same with the number of voltages of the group of negative polarity gamma reference voltages. Therefore, design flexibility of the source drive circuit and the display panels is improved and cost of the display panels is reduced.
Description
Technical field
The invention relates to a kind of method and source electrode drive circuit of exporting gamma reference voltage, espespecially a kind of method and source electrode drive circuit of capable of regulating output gamma reference voltage.
Background technology
Because the liquid crystal of liquid crystal panel can't for a long time by the voltage driving of same polarity, so the polarity of the liquid crystal of liquid crystal panel must constantly be reversed, produce polarization phenomena with the liquid crystal that prevents liquid crystal panel.In general, the inverted versions of the liquid crystal of liquid crystal panel can be divided into row counter-rotating, row counter-rotating, some counter-rotating and picture frame counter-rotating.Please refer to Figure 1A, Figure 1B and Fig. 1 C, Fig. 1 D, Figure 1A is the synoptic diagram for the liquid crystal row counter-rotating of explanation liquid crystal panel, Figure 1B is the synoptic diagram for the capable counter-rotating of liquid crystal of explanation liquid crystal panel, Fig. 1 C is the synoptic diagram for the liquid crystal dots counter-rotating of explanation liquid crystal panel, and Fig. 1 D is the synoptic diagram for the liquid crystal picture frame counter-rotating of explanation liquid crystal panel.Shown in Figure 1A, liquid crystal panel is opposite in the polarity of each row pixel of picture Fn+1 at polarity and the liquid crystal panel of each row pixel of picture Fn; As shown in Figure 1B, liquid crystal panel is opposite in the polarity of every delegation pixel of picture Fn+1 at polarity and the liquid crystal panel of every delegation pixel of picture Fn; Shown in Fig. 1 C, liquid crystal panel is opposite in the polarity of the corresponding pixel of picture Fn+1 with liquid crystal panel in the polarity of each pixel of picture Fn, and liquid crystal panel is not identical in the polarity of the polarity of each pixel of picture Fn and neighbor; Shown in Fig. 1 D, source electrode drive circuit is opposite in the signal polarity of the output of picture Fn+1 at signal polarity and the source electrode drive circuit of the output of picture Fn.Because the polarity of the liquid crystal of liquid crystal panel must constantly be reversed, so must provide one group of positive polarity gamma reference voltage and one group of negative polarity gamma reference voltage to liquid crystal panel in order to the source electrode drive circuit that drives liquid crystal panel.Please refer to Fig. 2, explanation one group of positive polarity gamma reference voltage V1-V7 providing of source electrode drive circuit and the synoptic diagram of one group of negative polarity gamma reference voltage V8-V14 are provided Fig. 2.As shown in Figure 2, the pressure reduction between one group of positive polarity gamma reference voltage V1-V7 and the reference voltage VREF reduces from left to right gradually, and the from left to right also gradually minimizing of pressure reduction between one group of negative polarity gamma reference voltage V8-V14 and the reference voltage VREF.In addition, the longitudinal axis of Fig. 2 is to be voltage, and the transverse axis of Fig. 2 is to be GTG.
But but the Organic Light Emitting Diode self-luminescence, and do not have the problem of polarization.Therefore, needn't provide one group of positive polarity gamma reference voltage and one group of negative polarity gamma reference voltage to organic LED panel in order to the source electrode drive circuit that drives organic LED panel.
In sum, because it is not identical with demand in order to the source electrode drive circuit that drives liquid crystal panel in order to the demand of the source electrode drive circuit that drives organic LED panel, so panel designer must design different source electrode drive circuits from the source electrode drive circuit deviser, with in response to organic LED panel and liquid crystal panel.So, not only the design flexibility of panel will reduce greatly, and can't reduce the cost of panel.
Summary of the invention
One embodiment of the invention provide a kind of method of capable of regulating output gamma reference voltage.The method comprises the panel classification according to the display panel in the panel classification of plural number kind display panel, generation is corresponding to the polarity control signal of this panel classification, and wherein a plurality of polarity control signals corresponding to the panel classification of this plural number kind display panel are to be difference; According to this polarity control signal, produce the polar signal corresponding to this display panel; According to this polar signal, produce and export a plurality of gamma reference voltages; Wherein these a plurality of gamma reference voltages comprise one group of positive polarity gamma reference voltage and one group of negative polarity gamma reference voltage, and the number of voltages of this group positive polarity gamma reference voltage is identical with number of voltages of this group negative polarity gamma reference voltage.
An also embodiment of the present invention provides a kind of source electrode drive circuit of capable of regulating output gamma reference voltage.This source electrode drive circuit comprise positive polarity gamma reference voltage generation circuit, negative polarity gamma reference voltage generation circuit, the first switch to and second switch pair.This positive polarity gamma reference voltage generation circuit is in order to produce and to export one group of positive polarity gamma reference voltage; This negative polarity gamma reference voltage generation circuit is in order to produce and to export one group of negative polarity gamma reference voltage; This first switch in order to the polar signal of basis corresponding to the panel classification of the display panel in the panel classification of plural number kind display panel, is exported this group positive polarity gamma reference voltage to panel to being to be coupled to this positive polarity gamma reference voltage generation circuit; This second switch in order to according to this polar signal, is exported this group negative polarity gamma reference voltage to this panel to being to be coupled to this negative polarity gamma reference voltage generation circuit; Wherein a plurality of polar signals corresponding to the panel classification of this plural number kind display panel are to be difference.
The invention provides a kind of method of capable of regulating output gamma reference voltage and the source electrode drive circuit of capable of regulating output gamma reference voltage.The method and this source electrode drive circuit are to utilize controller according to the panel classification of the display panel in the panel classification of plural number kind display panel, generation is corresponding to the polarity control signal of this panel classification, and wherein a plurality of polarity control signals corresponding to the panel classification of this plural number kind display panel are to be difference.Then, sequential control circuit is according to this polarity control signal, and generation is given this source electrode drive circuit corresponding to the polar signal of this display panel.At last, this source electrode drive circuit produces and exports a plurality of gamma reference voltages to this display panel according to this polar signal.Therefore, according to the method, this source electrode drive circuit not only can drive liquid crystal panel also can drive organic LED panel.So, the present invention not only increases the design flexibility of this source electrode drive circuit and this display panel, and effectively reduces the cost of this display panel.
Description of drawings
Figure 1A is the synoptic diagram for the liquid crystal row counter-rotating of explanation liquid crystal panel.
Figure 1B is the synoptic diagram for the capable counter-rotating of liquid crystal of explanation liquid crystal panel.
Fig. 1 C is the synoptic diagram for the liquid crystal dots counter-rotating of explanation liquid crystal panel.
Fig. 1 D is the synoptic diagram for the liquid crystal picture frame counter-rotating of explanation liquid crystal panel.
Explanation one group of positive polarity gamma reference voltage providing of source electrode drive circuit and the synoptic diagram of one group of negative polarity gamma reference voltage are provided Fig. 2.
Fig. 3 is the synoptic diagram for the display system that a kind of capable of regulating output gamma reference voltage is described.
Fig. 4 be for explanation when the panel classification be during for liquid crystal panel, polar signal is the synoptic diagram of the polar signal that switches in turn for positive polarity and negative polarity.
Fig. 5 A be for explanation when the panel classification be during for organic LED panel, polar signal is the synoptic diagram for positive signal.
Fig. 5 B be for explanation when the panel classification be during for organic LED panel, polar signal is the synoptic diagram for the negative polarity signal.
Fig. 6 A utilizes the derive synoptic diagram of positive polarity gamma reference voltage of one group of negative polarity gamma reference voltage for explanation.
Fig. 6 B utilizes the derive synoptic diagram of negative polarity gamma reference voltage of one group of positive polarity gamma reference voltage for explanation.
Fig. 7 source electrode drive circuit produces and exports the synoptic diagram of gamma reference voltage according to polar signal.
Fig. 8 is the process flow diagram that a kind of method of capable of regulating output gamma reference voltage is described for one embodiment of the invention.
Wherein, description of reference numerals is as follows:
300 display systems
302 controllers
304 source electrode drive circuits
306 liquid crystal panels
307 sequential control circuits
308 organic LED panels
3042 positive polarity gamma reference voltage generation circuits
3044 negative polarity gamma reference voltage generation circuits
3,046 first switches pair
3048 second switches pair
3050 phase inverters
Fn, Fn+1 picture
PCS1, PCS2 polarity control signal
PS1, PS2 polar signal
The polar signal that PS1 ', PS2 ' are anti-phase
S1, S2, S3, S4 switch
V1-V7 positive polarity gamma reference voltage
V8-V14 negative polarity gamma reference voltage
The VREF reference voltage
+ positive polarity
-negative polarity
800 to 806 steps
Embodiment
Please refer to Fig. 3, Fig. 3 is the synoptic diagram of the display system 300 of a kind of capable of regulating output of explanation gamma reference voltage.Controller 302 in the display system 300 produces the polarity control signal corresponding to the panel classification according to the panel classification.That is when source electrode drive circuit 304 be when driving liquid crystal panel 306, controller 302 is according to liquid crystal panel 306, produces polarity control signal PCS1 corresponding to liquid crystal panel 306 to sequential control circuit 307; When source electrode drive circuit 304 is when driving organic LED panel 308, controller 302 is according to organic LED panel 308, produces polarity control signal PCS2 corresponding to organic LED panel 308 to sequential control circuit 307.Then, sequential control circuit 307 is according to polarity control signal PCS1, generation corresponding to the polar signal PS1 of liquid crystal panel 306 to source electrode drive circuit 304, or sequential control circuit 307 is according to polarity control signal PCS2, generation corresponding to the polar signal PS2 of organic LED panel 308 to source electrode drive circuit 304, wherein polarity control signal PCS1 is different with polarity control signal PCS2, and polar signal PS1 is also different with polar signal PS2.As shown in Figure 3, sequential control circuit 307 is to be coupled to controller 302.But in an also embodiment of the present invention, controller 302 is to be included in integrated driving circuit, and wherein integrated driving circuit also comprises source electrode drive circuit, gate drive circuit and sequential control circuit.
Please refer to Fig. 4, Fig. 4 for explanation when the panel classification be during for liquid crystal panel 306, polar signal PS1 is the synoptic diagram of the polar signal that switches in turn for positive polarity (+) and negative polarity (-), and wherein Fig. 4 utilizes that the liquid crystal of liquid crystal panel 306 is capable to reverse to illustrate the present invention.Therefore, as shown in Figure 3, source electrode drive circuit 304 can be according to polar signal PS1, produce in turn and export one group of positive polarity gamma reference voltage V1-V7 and one group of negative polarity gamma reference voltage V8-V14 (as shown in Figure 2) to liquid crystal panel 306, should be noted corresponding positive polarity gamma reference voltage V1-V7 and the negative polarity gamma reference voltage V8-V14 (as shown in Figure 2) that produces of individual other shade of gray.But the present invention is not limited to one group of positive polarity gamma reference voltage has 7 voltage V1-V7, and one group of negative polarity gamma reference voltage has 7 voltage V8-V14.As shown in Figure 4, when polar signal PS1 is during for positive polarity (+), this moment because the odd-numbered line pixel of liquid crystal panel 306 be for positive polarity (+) and even number line pixel be to be negative polarity (-), so source electrode drive circuit 304 is according to polar signal PS1, produce also and export one group of positive polarity gamma reference voltage V1-V7 to the odd-numbered line pixel of liquid crystal panel 306, and produce and export one group of negative polarity gamma reference voltage V8-V14 to the even number line pixel of liquid crystal panel 306; When polar signal PS1 is during for negative polarity (-), this moment because the odd-numbered line pixel of liquid crystal panel 306 be for negative polarity (-) and even number line pixel be to be positive polarity (+), so source electrode drive circuit 304 is according to polar signal PS1, produce also and export one group of negative polarity gamma reference voltage V8-V14 to the odd-numbered line pixel of liquid crystal panel 306, and produce and export one group of positive polarity gamma reference voltage V1-V7 to the even number line pixel of liquid crystal panel 306.But the present invention also can have the knack of this operator through behind the simple the regulation of electrical circuit, so that when polar signal PS1 be during for positive polarity (+) situation, source electrode drive circuit 304 is according to polar signal PS1, produce also and export one group of positive polarity gamma reference voltage V1-V7 to the even number line pixel of liquid crystal panel 306, and produce and export one group of negative polarity gamma reference voltage V8-V14 to the odd-numbered line pixel of liquid crystal panel 306; When polar signal PS1 is during for negative polarity (-) situation, source electrode drive circuit 304 is according to polar signal PS1, produce also and export one group of negative polarity gamma reference voltage V8-V14 to the even number line pixel of liquid crystal panel 306, and produce and export one group of positive polarity gamma reference voltage V1-V7 to the odd-numbered line pixel of liquid crystal panel 306.In addition, the principle of the counter-rotating of the liquid crystal of liquid crystal panel 306 row, liquid crystal dots counter-rotating and the counter-rotating of liquid crystal picture frame is identical with the capable counter-rotating of liquid crystal, does not repeat them here.
Please refer to Fig. 5 A and Fig. 5 B, Fig. 5 A for explanation when the panel classification be during for organic LED panel 308, polar signal PS2 is the synoptic diagram for positive polarity (+) signal, Fig. 5 B be for explanation when the panel classification be during for organic LED panel 308, polar signal PS2 is the synoptic diagram for negative polarity (-) signal.Shown in Fig. 3 and Fig. 5 A, source electrode drive circuit 304 can be according to polar signal PS2 (positive polarity (+) signal), export one group of positive polarity gamma reference voltage V1-V7 to the odd-numbered line pixel of organic LED panel 308 and generation and output derived from the positive polarity gamma reference voltage V7-V1 of the one group of negative polarity gamma reference voltage V8-V14 even number line pixel to organic LED panel 308; Or shown in Fig. 3 and Fig. 5 B, source electrode drive circuit 304 can be according to polar signal PS2 (negative polarity (-) signal), and output is derived from one group of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 odd-numbered line pixel to the even number line pixel of organic LED panel 308 and one group of negative polarity gamma reference voltage V8-V14 to organic LED panel 308.But the present invention is not limited to Fig. 5 A and Fig. 5 B is row counter-rotating pattern.But the present invention also can have the knack of this operator through behind the simple the regulation of electrical circuit, so that when polar signal PS2 be during for positive polarity (+) situation, source electrode drive circuit 304 can be according to polar signal PS2 (positive polarity (+) signal), export one group of positive polarity gamma reference voltage V1-V7 to the even number line pixel of organic LED panel 308 and generation and output derived from the positive polarity gamma reference voltage V7-V1 of the one group of negative polarity gamma reference voltage V8-V14 odd-numbered line pixel to organic LED panel 308.And when polar signal PS2 is during for negative polarity (-) situation, source electrode drive circuit 304 can be according to polar signal PS2 (negative polarity (-) signal), and output is derived from one group of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 even number line pixel to the odd-numbered line pixel of organic LED panel 308 and one group of negative polarity gamma reference voltage V8-V14 to organic LED panel 308.
Please refer to Fig. 6 A and Fig. 6 B, Fig. 6 A is for explanation utilizes the derive synoptic diagram of positive polarity gamma reference voltage V7-V1 of one group of negative polarity gamma reference voltage V8-V14, and Fig. 6 B utilizes the derive synoptic diagram of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 for explanation.Such as Fig. 6 A and shown in Figure 2, with the pressure reduction of each the negative polarity gamma reference voltage among one group of negative polarity gamma reference voltage V8-V14 and the reference voltage VREF pressure reduction corresponding to a positive polarity gamma reference voltage and reference voltage VREF, with the one group of positive polarity gamma reference voltage V7-V1 that derives.For example, the pressure reduction of negative polarity gamma reference voltage V14 and reference voltage VREF is the pressure reduction corresponding to positive polarity gamma reference voltage V1 and reference voltage VREF.Therefore, shown in Fig. 6 A and Fig. 5 A, when source electrode drive circuit 304 produce according to polar signal PS2 (positive polarity (+) signal) and output derived from one group of positive polarity gamma reference voltage V7-V1 of one group of negative polarity gamma reference voltage V8-V14 during to the even number line pixel of organic LED panel 308, source electrode drive circuit 304 namely is the even number line pixel that according to Fig. 6 A one group of positive polarity gamma reference voltage V7-V1 is produced and exports to organic LED panel 308.
Shown in Fig. 6 B, with the pressure reduction of each the positive polarity gamma reference voltage among one group of positive polarity gamma reference voltage V1-V7 and the reference voltage VREF pressure reduction corresponding to a negative polarity gamma reference voltage and reference voltage VREF, with the one group of negative polarity gamma reference voltage V14-V8 that derives.For example, the pressure reduction of positive polarity gamma reference voltage V1 and reference voltage VREF is the pressure reduction corresponding to negative polarity gamma reference voltage V14 and reference voltage VREF.Therefore, shown in Fig. 6 B and Fig. 5 B, when source electrode drive circuit 304 produce according to polar signal PS2 (negative polarity (-) signal) and output derived from one group of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 during to the even number line pixel of organic LED panel 308, source electrode drive circuit 304 namely is the even number line pixel that according to Fig. 6 B one group of negative polarity gamma reference voltage V14-V8 is produced and exports to organic LED panel 308.
Please refer to Fig. 7, Fig. 7 source electrode drive circuit 304 produces and exports the synoptic diagram of gamma reference voltage according to polar signal.As shown in Figure 7, source electrode drive circuit 304 comprise positive polarity gamma reference voltage generation circuit 3042, negative polarity gamma reference voltage generation circuit 3044, the first switch to 3046 and second switch to 3048, wherein phase inverter 3050 is in order to reverse polarity signal PS1/PS2, to produce anti-phase polar signal PS1 '/PS2 '.Positive polarity gamma reference voltage generation circuit 3042 is in order to produce and to export one group of positive polarity gamma reference voltage V1-V7; Negative polarity gamma reference voltage generation circuit 3044 is in order to produce and to export one group of negative polarity gamma reference voltage V14-V8.The first switch is to be coupled to positive polarity gamma reference voltage generation circuit 3042 to 3046, and comprises switch S 1, S2.Switch S 1 has first end, be coupled to positive polarity gamma reference voltage generation circuit 3042, the second end, in order to receive anti-phase polar signal PS1 '/PS2 ', and the 3rd end, in order to according to anti-phase polar signal PS1 '/PS2 ', export one group of positive polarity gamma reference voltage V1-V7 to the even number line data line of liquid crystal panel 306 and organic LED panel 308; Switch S 2 has first end, be coupled to positive polarity gamma reference voltage generation circuit 3042, the second end, in order to receiving polarity signal PS1/PS2, and the 3rd end, in order to according to polar signal PS1/PS2, export one group of positive polarity gamma reference voltage V1-V7 to the odd-numbered line data line of liquid crystal panel 306 and organic LED panel 308.Second switch is to be coupled to negative polarity gamma reference voltage generation circuit 3044 to 3048, and comprises switch S 3, S4.Switch S 3 has first end, be coupled to negative polarity gamma reference voltage generation circuit 3044, the second end, in order to receive anti-phase polar signal PS1 '/PS2 ', and the 3rd end, in order to according to anti-phase polar signal PS1 '/PS2 ', export one group of negative polarity gamma reference voltage V14-V8 to the odd-numbered line data line of liquid crystal panel 306 and organic LED panel 308; Switch S 4 has first end, be coupled to negative polarity gamma reference voltage generation circuit 3044, the second end, in order to receiving polarity signal PS1/PS2, and the 3rd end, in order to according to polar signal PS1/PS2, export one group of negative polarity gamma reference voltage V14-V8 to the even number line data line of liquid crystal panel 306 and organic LED panel 308.
Such as Fig. 7 and shown in Figure 4, when the panel classification is during for liquid crystal panel 306, polar signal PS1 is the polar signal that switches in turn for positive polarity (+) and negative polarity (-).When polar signal PS1 is during for positive polarity (+), switch S 1, S3 close (OFF) and switch S 2, S4 opens (ON).At this moment, positive polarity gamma reference voltage generation circuit 3042 in the source electrode drive circuit 304 is sent to the odd-numbered line pixel of liquid crystal panel 306 by the switch S 2 of opening with positive polarity gamma reference voltage V1-V7, and the negative polarity gamma reference voltage generation circuit 3044 in the source electrode drive circuit 304 is sent to negative polarity gamma reference voltage V8-V14 by the switch S 4 of opening the even number line pixel of liquid crystal panel 306.Such as Fig. 7 and shown in Figure 4, when polar signal PS1 is during for negative polarity (-), switch S 1, S3 opens and switch S 2, S4 are closed.At this moment, positive polarity gamma reference voltage generation circuit 3042 in the source electrode drive circuit 304 is sent to the even number line pixel of liquid crystal panel 306 by the switch S 1 of opening with positive polarity gamma reference voltage V1-V7, and the negative polarity gamma reference voltage generation circuit 3044 in the source electrode drive circuit 304 is sent to negative polarity gamma reference voltage V8-V14 by the switch S 3 of opening the odd-numbered line pixel of liquid crystal panel 306.
Shown in Fig. 7 and Fig. 5 A, when the panel classification is that switch S 1, S3 close (OFF) and switch S 2, S4 opens (ON) for organic LED panel 308 and polar signal PS2 are during for positive polarity (+) signal.At this moment, positive polarity gamma reference voltage generation circuit 3042 in the source electrode drive circuit 304 is sent to the odd-numbered line pixel of organic LED panel 308 by the switch S 2 of opening with positive polarity gamma reference voltage V1-V7, and the negative polarity gamma reference voltage generation circuit 3044 in the source electrode drive circuit 304 will be sent to derived from the positive polarity gamma reference voltage V7-V1 of one group of negative polarity gamma reference voltage V8-V14 the even number line pixel of organic LED panel 308 by the switch S 4 of opening.
Shown in Fig. 7 and Fig. 5 B, when the panel classification is that switch S 1, S3 open (ON) and switch S 2, S4 closes (OFF) for organic LED panel 308 and polar signal PS2 are during for negative polarity (-) signal.At this moment, positive polarity gamma reference voltage generation circuit 3042 in the source electrode drive circuit 304 will be sent to derived from one group of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 the even number line pixel of organic LED panel 308 by the switch S 1 of opening, and the negative polarity gamma reference voltage generation circuit 3044 in the source electrode drive circuit 304 is sent to one group of negative polarity gamma reference voltage V8-V14 by the switch S 3 of opening the odd-numbered line pixel of organic LED panel 308.
Please refer to Fig. 8, Fig. 4, Fig. 5 A and Fig. 5 B, Fig. 8 is the process flow diagram that a kind of method of capable of regulating output gamma reference voltage is described for one embodiment of the invention.The method of Fig. 8 is to utilize display system 300 explanations of Fig. 3, and detailed step is as follows:
Step 800: beginning;
Step 802: according to the panel classification of the display panel in the panel classification of plural number kind display panel, produce the polarity control signal corresponding to the panel classification;
Step 804: according to polarity control signal, produce the polar signal corresponding to display panel;
Step 806: according to polar signal, produce and export a plurality of gamma reference voltages.
Take the liquid crystal panel 306 of Fig. 4 as example:
In step 802, controller 302 is according to liquid crystal panel 306, produces polarity control signal PCS1 corresponding to liquid crystal panel 306 to sequential control circuit 307.In step 804, sequential control circuit 307 is according to polarity control signal PCS1, produces polar signal PS1 corresponding to liquid crystal panel 306 to source electrode drive circuit 304.In step 806, as shown in Figure 4, when polar signal PS1 is during for positive polarity (+), this moment because the odd-numbered line pixel of liquid crystal panel 306 be for positive polarity (+) and even number line pixel be to be negative polarity (-), so source electrode drive circuit 304 according to polar signal PS1, produces and exports one group of positive polarity gamma reference voltage V1-V7 to odd-numbered line pixel and the generation of liquid crystal panel 306 and exports one group of negative polarity gamma reference voltage V8-V14 to the even number line pixel of liquid crystal panel 306; When polar signal PS1 is during for negative polarity (-), this moment because the odd-numbered line pixel of liquid crystal panel 306 be for negative polarity (-) and even number line pixel be to be positive polarity (+), so source electrode drive circuit 304 is according to polar signal PS1, produce also and export one group of negative polarity gamma reference voltage V8-V14 to the odd-numbered line pixel of liquid crystal panel 306, and produce and export one group of positive polarity gamma reference voltage V1-V7 to the even number line pixel of liquid crystal panel 306.
Take the organic LED panel 308 of Fig. 5 A as example:
In step 802, controller 302 is according to organic LED panel 308, and generation is given sequential control circuit 307 corresponding to the polarity control signal PCS2 (being different from polarity control signal PCS1) of organic LED panel 308.In step 804, sequential control circuit 307 is according to polarity control signal PCS2, and generation is given source electrode drive circuit 304 corresponding to the polar signal PS2 (positive polarity (+) signal) of organic LED panel 308.In step 806, source electrode drive circuit 304 is according to positive signal PS2, export one group of positive polarity gamma reference voltage V1-V7 to the odd-numbered line pixel of organic LED panel 308 and generation and output derived from the positive polarity gamma reference voltage V7-V1 of the one group of negative polarity gamma reference voltage V8-V14 even number line pixel to organic LED panel 308.
Take the organic LED panel 308 of Fig. 5 B as example:
In step 802, controller 302 is according to organic LED panel 308, produces polarity control signal PCS2 corresponding to organic LED panel 308 to sequential control circuit 307.In step 804, sequential control circuit 307 is according to polarity control signal PCS2, and generation is given source electrode drive circuit 304 corresponding to the polar signal PS2 (negative polarity (-) signal) of organic LED panel 308.In step 806, source electrode drive circuit 304 is according to negative polarity signal PS2, export one group of negative polarity gamma reference voltage V8-V14 to the odd-numbered line pixel of organic LED panel 308 and generation and output derived from one group of negative polarity gamma reference voltage V14-V8 of one group of positive polarity gamma reference voltage V1-V7 even number line pixel to organic LED panel 308.
In sum, the source electrode drive circuit of the method for a kind of capable of regulating output gamma reference voltage provided by the present invention and capable of regulating output gamma reference voltage is to utilize controller according to the panel classification of the display panel in the panel classification of plural number kind display panel, generation is corresponding to the polarity control signal of panel classification, and wherein a plurality of polarity control signals corresponding to the panel classification of plural number kind display panel are to be difference.Then, sequential control circuit is according to polarity control signal, produces polar signal corresponding to display panel to source electrode drive circuit.At last, source electrode drive circuit produces and exports a plurality of gamma reference voltages to display panel according to polar signal.Therefore, according to the method for capable of regulating output gamma reference voltage provided by the present invention, source electrode drive circuit not only can drive liquid crystal panel also can drive organic LED panel.So, the present invention not only increases the design flexibility of source electrode drive circuit and display panel, and effectively reduces the cost of display panel.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the method for a capable of regulating output gamma reference voltage is characterized in that, comprising:
According to the panel classification of the display panel in the panel classification of plural number kind display panel, produce the polarity control signal corresponding to this panel classification, wherein a plurality of polarity control signals corresponding to the panel classification of this plural number kind display panel are to be difference;
According to this polarity control signal, produce the polar signal corresponding to this display panel; And
According to this polar signal, produce and export a plurality of gamma reference voltages.
2. the method for claim 1, it is characterized in that, when this panel classification is during for liquid crystal panel, this polar signal is the polar signal that switches in turn for positive polarity and negative polarity, these a plurality of gamma reference voltages comprise one group of positive polarity gamma reference voltage and one group of negative polarity gamma reference voltage, and the number of voltages of this group positive polarity gamma reference voltage is identical with number of voltages of this group negative polarity gamma reference voltage.
3. method as claimed in claim 2, it is characterized in that, when this polar signal is during for positive polarity, source electrode drive circuit is according to this polar signal, produce also and export this group positive polarity gamma reference voltage to the odd-numbered line pixel of this liquid crystal panel, and generation and export this group negative polarity gamma reference voltage to the even number line pixel of this liquid crystal panel; When this polar signal is during for negative polarity, this source electrode drive circuit is according to this polar signal, produce also and export this group negative polarity gamma reference voltage to the odd-numbered line pixel of this liquid crystal panel, and generation and export this group positive polarity gamma reference voltage to the even number line pixel of this liquid crystal panel.
4. method as claimed in claim 2, it is characterized in that, when this polar signal is during for positive polarity, source electrode drive circuit is according to this polar signal, produce also and export this group positive polarity gamma reference voltage to the even number line pixel of this liquid crystal panel, and generation and export this group negative polarity gamma reference voltage to the odd-numbered line pixel of this liquid crystal panel; When this polar signal is during for negative polarity, this source electrode drive circuit is according to this polar signal, produce also and export this group negative polarity gamma reference voltage to the even number line pixel of this liquid crystal panel, and generation and export this group positive polarity gamma reference voltage to the odd-numbered line pixel of this liquid crystal panel.
5. the method for claim 1 is characterized in that, when this panel classification is during for organic LED panel, this polar signal is to be positive signal or negative polarity signal.
6. method as claimed in claim 5, it is characterized in that, when this polar signal is during for this positive signal, these a plurality of gamma reference voltages comprise one group of positive polarity gamma reference voltage with derived from the positive polarity gamma reference voltage of one group of negative polarity gamma reference voltage, and source electrode drive circuit is according to this positive signal, produce and export this group positive polarity gamma reference voltage and derived from the positive polarity gamma reference voltage of this group negative polarity gamma reference voltage to this organic LED panel, it is characterized in that the number of voltages of this group positive polarity gamma reference voltage is identical with the number of voltages of this group negative polarity gamma reference voltage.
7. method as claimed in claim 5, it is characterized in that, when this polar signal is during for this negative polarity signal, these a plurality of gamma reference voltages comprise one group of negative polarity gamma reference voltage with derived from the negative polarity gamma reference voltage of one group of positive polarity gamma reference voltage, and source electrode drive circuit is according to this negative polarity signal, produce and export this group negative polarity gamma reference voltage and derived from the negative polarity gamma reference voltage of this group positive polarity gamma reference voltage to this organic LED panel, it is characterized in that the number of voltages of this group negative polarity gamma reference voltage is identical with the number of voltages of this group positive polarity gamma reference voltage.
8. the source electrode drive circuit of capable of regulating output gamma reference voltage comprises:
The positive polarity gamma reference voltage generation circuit is in order to produce and to export one group of positive polarity gamma reference voltage;
The negative polarity gamma reference voltage generation circuit is in order to produce and to export one group of negative polarity gamma reference voltage;
This source electrode drive circuit is characterised in that also and comprises:
The first switch pair is coupled to this positive polarity gamma reference voltage generation circuit, in order to according to the polar signal corresponding to the panel classification of the display panel in the panel classification of plural number kind display panel,
Export this group positive polarity gamma reference voltage to panel; And
Second switch pair is coupled to this negative polarity gamma reference voltage generation circuit, in order to according to this polar signal, exports this group negative polarity gamma reference voltage to this panel;
Wherein a plurality of polar signals corresponding to the panel classification of this plural number kind display panel are to be difference.
9. source electrode drive circuit as claimed in claim 8 is characterized in that, also comprises:
Phase inverter is in order to produce the inversion signal of this polar signal.
10. source electrode drive circuit as claimed in claim 9 is characterized in that,
This first switch is to comprising:
The first switch has first end, is coupled to this positive polarity gamma reference voltage generation circuit, and the second end in order to receive the inversion signal of this polar signal, reaches the 3rd end, in order to export this group positive polarity gamma reference voltage to the even number line data line of this panel; And
Second switch has first end, is coupled to this positive polarity gamma reference voltage generation circuit, and the second end in order to receive this polar signal, reaches the 3rd end, in order to export this group positive polarity gamma reference voltage to the odd-numbered line data line of this panel; And
This second switch is to comprising:
The 3rd switch has first end, is coupled to this negative polarity gamma reference voltage generation circuit, and the second end in order to receive the inversion signal of this polar signal, reaches the 3rd end, in order to export this group negative polarity gamma reference voltage to the odd-numbered line data line of this panel; And
The 4th switch has first end, is coupled to this negative polarity gamma reference voltage generation circuit, and the second end in order to receive this polar signal, reaches the 3rd end, in order to export this group positive polarity gamma reference voltage to the even number line data line of this panel.
11. source electrode drive circuit as claimed in claim 8 is characterized in that, this panel is to be liquid crystal panel or organic LED panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101058621A CN103377623A (en) | 2012-04-11 | 2012-04-11 | A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101058621A CN103377623A (en) | 2012-04-11 | 2012-04-11 | A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof |
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| CN103377623A true CN103377623A (en) | 2013-10-30 |
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| CN2012101058621A Pending CN103377623A (en) | 2012-04-11 | 2012-04-11 | A source drive circuit capable of adjustably outputting gamma reference voltages and a method thereof |
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