CN102956173A - Display driving device and driving method thereof - Google Patents
Display driving device and driving method thereof Download PDFInfo
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- CN102956173A CN102956173A CN2011102358506A CN201110235850A CN102956173A CN 102956173 A CN102956173 A CN 102956173A CN 2011102358506 A CN2011102358506 A CN 2011102358506A CN 201110235850 A CN201110235850 A CN 201110235850A CN 102956173 A CN102956173 A CN 102956173A
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Abstract
The invention discloses a display driving device and a driving method thereof. The driving device comprises a display data detector, a power controller and a source drive. The display data detector is used for detecting multiple display data and generating control signals according to the maximum value of the display data which correspond to multiple gamma voltages. The power controller is used for receiving the control signals and provides a driving power source according to the control signals. The source drive receives the driving power source as an operating power source and generates driving voltages corresponding to the display data according to the driving power source and the gamma voltages.
Description
Technical field
The present invention relates to a kind of Drive And Its Driving Method of display, and relate in particular to a kind of Drive And Its Driving Method of saving the display of power consumption.
Background technology
Please refer to the drive unit block scheme that Fig. 1 shows existing display.Wherein, display 100 comprises display panel 110, frequency controller 120, power-supply controller of electric 130, gate drivers 140 and source electrode driver 150.Frequency controller 120 receives driving timing control signal HT1 and the VT1 that shows data DATAIN and gate drivers 140 and source electrode driver 150 are provided respectively.150 of gate drivers 140 and source electrode drivers transmit the driving signal according to the driving timing control signal HT1 that receives and VT1 respectively and drive display panel 110.In addition, source electrode driver 150 is also adjusted the magnitude of voltage of the driving signal of the display panel that offers 110 according to the magnitude of voltage that shows the corresponding gamma voltage of data DATAIN, so that the pixel on the display panel 110 can show different brightness.
In existing display 100, the operating power of source electrode driver 150 comes from the driving power POW that power-supply controller of electric 130 provides.In order to make source electrode driver 150 can make display panel 110 show various brightness, the driving power POW that power-supply controller of electric 130 provides is a fixing and relatively high magnitude of voltage (for example showing the required driving voltage of maximum gray a little more than display panel 110) normally.This practice is when the shown brightness of display 100 reduce, the driving power POW of the voltage quasi position that power-supply controller of electric 130 or the essential generation that continues are relatively high.The unnecessary loss of the power that also therefore, causes.
Summary of the invention
The invention provides a kind of Drive And Its Driving Method of display, effectively lower the power that consumes when driving.
The present invention proposes a kind of drive unit of display, comprises showing data detector, power-supply controller of electric and source electrode driver.Show data detector in order to detecting a plurality of demonstration data, and produce control signal according to the maximal value that shows data, wherein, show the corresponding a plurality of gamma voltages of data.Power-supply controller of electric couples the demonstration data detector, in order to reception control signal, and provides driving power according to control signal.Source electrode driver then couples power-supply controller of electric, to receive driving power with as operating power.Source electrode driver also produces the corresponding driving voltage that respectively shows data according to driving power and each gamma voltage.
In one embodiment of this invention, above-mentioned gamma voltage comprises a plurality of positive polarity gamma voltages and a plurality of negative polarity gamma voltage.Control signal comprises positive polarity control signal and negative polarity control signal, and driving power comprises positive polarity driving power and negative polarity driving power.
In one embodiment of this invention, above-mentioned demonstration data detector calculates and shows corresponding positive polarity gamma voltage and the negative polarity gamma voltage of data.Show data detector and produce respectively positive polarity control signal and negative polarity control signal according to the maximal value of the difference of the maximal value of positive polarity gamma voltage and the difference of a shared voltage and negative polarity gamma voltage and this share voltage.
In one embodiment of this invention, above-mentioned power-supply controller of electric comprises positive polarity power generation circuit and negative polarity power generation circuit.The positive polarity power generation circuit couples the demonstration data detector, receive and according to the positive polarity control signal to produce the positive polarity driving power.The negative polarity power generation circuit couples the demonstration data detector, receive and according to the negative polarity control signal to produce the negative polarity driving power.
In one embodiment of this invention, above-mentioned positive polarity power generation circuit comprises the first bleeder circuit and first single gain amplifier.The first bleeder circuit receives and according to the positive polarity control signal voltage source is carried out dividing potential drop, and produces the first branch pressure voltage.First single gain amplifier couples the first bleeder circuit, in order to receive the first branch pressure voltage to produce the positive polarity driving power.The negative polarity power generation circuit comprises the second bleeder circuit and second single gain amplifier.The second bleeder circuit receives and according to the negative polarity control signal voltage source is carried out dividing potential drop, and produces the second branch pressure voltage.Second single gain amplifier couples the second bleeder circuit, receives the second branch pressure voltage to produce the negative polarity driving power.
In one embodiment of this invention, above-mentioned positive polarity power generation circuit comprises the first operational amplifier and the first feedback circuit.The first input end of the first operational amplifier receives the first reference voltage, and its output terminal produces the positive polarity driving power.The first feedback circuit is serially connected between the second input end of the output terminal of the first operational amplifier and the first operational amplifier, producing the first branch pressure voltage, the first feedback circuit also transmits the second input end of the first branch pressure voltage to the first operational amplifier in order to foundation positive polarity control signal dividing potential drop positive polarity driving power.The negative polarity power generation circuit comprises the second operational amplifier and the second feedback circuit.The first input end of the second operational amplifier receives the second reference voltage, and its output terminal produces the negative polarity driving power.The second feedback circuit is serially connected between the second input end of the output terminal of the second operational amplifier and the second operational amplifier, producing the second branch pressure voltage, the second feedback circuit also transmits the second input end of the second branch pressure voltage to the second operational amplifier in order to foundation negative polarity control signal dividing potential drop negative polarity driving power.
In one embodiment of this invention, above-mentioned positive polarity power generation circuit comprises power supply changeover device.Power supply changeover device couples the demonstration data detector, receive and according to the positive polarity control signal so that input voltage is carried out boost action, produce the positive polarity driving power.
In one embodiment of this invention, above-mentioned negative polarity power generation circuit comprises the first operational amplifier and the first feedback circuit.The first input end of the first operational amplifier receives the first reference voltage, and its output terminal produces the negative polarity driving power.The first feedback circuit is serially connected between the second input end of the output terminal of the first operational amplifier and the first operational amplifier, in order to foundation negative polarity control signal dividing potential drop negative polarity driving power to produce the first branch pressure voltage.The first feedback circuit also transmits the second input end of the first branch pressure voltage to the first operational amplifier, and wherein, the first operational amplifier receives the positive polarity driving power and thinks its working power.
In one embodiment of this invention, above-mentioned negative polarity power generation circuit comprises the first bleeder circuit and first single gain amplifier.The first bleeder circuit receives and carries out dividing potential drop according to negative polarity control signal anticathode driving power, and produces the first branch pressure voltage.First single gain amplifier couples the first bleeder circuit, receives the first branch pressure voltage to produce the negative polarity driving power.Wherein, first single gain amplifier reception positive polarity driving power is thought its working power.
In one embodiment of this invention, above-mentioned power supply changeover device comprises power-switching circuit, bleeder circuit, error amplifier and pulse-width modulation signal generating circuit.Power-switching circuit receives input voltage, has power transistor, and power-switching circuit carries out boost action according to conducting and the cut-out action of power transistor to input voltage, and uses generation positive polarity driving power.Bleeder circuit couples power-switching circuit, and aligns the polarity driven power supply according to the positive polarity control signal and carry out dividing potential drop.The input end of error amplifier receives respectively dividing potential drop result and the reference voltage of bleeder circuit.Pulse-width modulation signal generating circuit couples the output terminal of error amplifier, produces pulse-width signal according to the voltage of the output terminal of error amplifier, and wherein, pulse-width signal is in order to conducting or rupturing duty transistor.
In one embodiment of this invention, above-mentioned power supply changeover device comprises power-switching circuit, bleeder circuit, error amplifier and pulse-width modulation signal generating circuit.Power-switching circuit receives input voltage, has power transistor, and power-switching circuit carries out boost action according to conducting and the cut-out action of power transistor to input voltage, and uses generation positive polarity driving power.Bleeder circuit couples power-switching circuit, and aligns the polarity driven power supply and carry out dividing potential drop.The input end of error amplifier receives respectively dividing potential drop result and the reference voltage of bleeder circuit, and wherein reference voltage is adjusted according to the positive polarity control signal.Pulse-width modulation signal generating circuit couples the output terminal of error amplifier, produces pulse-width signal according to the voltage of the output terminal of error amplifier, and wherein, pulse-width signal is in order to conducting or rupturing duty transistor.
In one embodiment of this invention, above-mentioned positive polarity power generation circuit and negative polarity power generation circuit comprise power supply changeover device.Power supply changeover device comprises power-switching circuit, electric capacity of voltage regulation, bleeder circuit, error amplifier and pulse-width modulation signal generating circuit.Power-switching circuit receives input voltage, has power transistor, and power-switching circuit carries out boost action according to conducting and the cut-out action of power transistor to input voltage.Bleeder circuit couples power-switching circuit, and aligns the polarity driven power supply and carry out dividing potential drop.The input end of error amplifier receives respectively dividing potential drop result and the reference voltage of bleeder circuit.Pulse-width modulation signal generating circuit couples the output terminal of error amplifier, produces pulse-width signal according to the voltage of the output terminal of error amplifier, and wherein, pulse-width signal is in order to conducting or rupturing duty transistor.Electric capacity of voltage regulation receives positive polarity control signal and negative polarity control signal, and produces positive polarity driving power and negative polarity driving power according to positive polarity control signal and negative polarity control signal.
The present invention proposes a kind of driving method of display, comprising: at first, detect a plurality of demonstration data, and produce control signal according to the maximal value that shows data.Then, provide driving power according to control signal.And according to driving power and show that respectively each gamma voltage corresponding to data produces the corresponding driving voltage that respectively shows data.
Based on above-mentioned, the present invention is directed to display demonstration data to display and detect, for coming corresponding generation control signal according to the maximal value that shows the gamma voltage that data produce.Control the driving power that power-supply controller of electric produces by control signal again, make source electrode driver receive this driving power and come the corresponding driving voltage that driving display is provided as operating voltage.Thus, the driving power of source electrode driver can dynamically be adjusted according to the voltage quasi position size of the driving voltage that will produce, and the driving power that does not need always to keep providing the highest effectively falls low-energy consumption to source electrode driver.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate accompanying drawing to be described in detail below.
Description of drawings
Fig. 1 shows the drive unit block scheme of existing display.
Fig. 2 shows the synoptic diagram of drive unit of the display of one embodiment of the invention.
Fig. 3 shows an embodiment of the power-supply controller of electric of the embodiment of the invention.
Fig. 4 A～Fig. 4 F shows respectively the different embodiments of the positive and negative polarity power generation circuit of the embodiment of the invention.
Fig. 5 shows the driving method of the display of one embodiment of the invention.
Reference numeral:
100: display
110: display panel
120: frequency controller
140: gate drivers
200: drive unit
210: show data detector
130,220: power-supply controller of electric
150,230: source electrode driver
221: the positive polarity power generation circuit
222: the negative polarity power generation circuit
211,212: storage unit
401,402: power supply changeover device
450: power-switching circuit
430,440: feedback circuit
470: pulse-width modulation signal generating circuit
450: power-switching circuit
410,420,460: bleeder circuit
471: the triangular wave generator
480: compensating circuit
HT1, VT1: timing control signal
DATAIN: show data
Fd, FdP, FdN: control signal
VDDA, POW, VDDAP, VDDAN: driving power
VDRV: driving voltage
UG1, UG2: single gain amplifier
GND: earth terminal
VCC: high-voltage power supply
VAP, VAN, VBP, VBN: branch pressure voltage
R51～R54, R61～R64, R71～R72: resistance
Cp, Cn: electric capacity of voltage regulation
OP1, OP2, OP3: operational amplifier
VREFP, VREFN: reference voltage
EA: error amplifier
VIN: input voltage
PT1: power transistor
S510～S530: the step of driving method
Embodiment
Please refer to Fig. 2, Fig. 2 shows the synoptic diagram of drive unit of the display of one embodiment of the invention.Drive unit 200 comprises demonstration data detector 210, power-supply controller of electric 220 and source electrode driver 230.Show that data detector 210 is to detect a plurality of demonstration data DATAIN, and produce control signal Fd according to the maximal value of the demonstration data DATAIN that inspects.At this, the quantity that shows data DATAIN can be the data volume of one or more picture frames (frame) of showing, also can be the data volume of one or more display columns of showing.The deviser can be set according to the demand of reality again.And, show that data DATAIN can be transferred into the storage unit 211 that shows that data detector 210 is built-in, and be temporarily stored in storage unit 211 for showing that data detectors 210 read.Perhaps, show data detector 210 also unnecessary built-in storage unit 211 come reading displayed data DATAIN (showing that data DATAIN then must keep in to storage unit 212 first) by plug-in storage unit 212.
Show that data detector 210 is after detecting the maximal value that shows among the data DATAIN, the corresponding gamma voltage of maximal value of the demonstration data DATAIN that detects of recycling just can obtain the magnitude of voltage of the driving voltage VDRV of the maximum that source electrode driver 230 may export.Therefore, show that data detector 210 produces control signal Fd according to the maximal value of the demonstration data DATAIN that detects, and control signal Fd is sent to power-supply controller of electric 220.
It should be noted that, because each shows that data DATAIN all can correspond to the gamma voltage (namely positive polarity gamma voltage and negative polarity gamma voltage) of two opposed polarities, and the absolute value of voltage of the positive and negative gamma voltage of corresponding identical demonstration data DATAIN might not be identical, therefore, show that the control signal Fd that data detector 210 produces can comprise positive polarity control signal and negative polarity control signal.
In addition, show that data detector 210 calculates all positive polarity gamma voltage corresponding to demonstration data DATAIN, and find out the maximal value in the difference of these positive polarity gamma voltages and share voltage, to produce the positive polarity control signal according to this maximum difference.Show that data detector 210 also calculates all negative polarity gamma voltage corresponding to demonstration data DATAIN, and find out the maximal value in the difference of these negative polarity gamma voltages and share voltage, to produce the negative polarity control signal according to this maximum difference.
Power-supply controller of electric 220 is coupled to and shows that data detector 210 is with reception control signal Fd.Power-supply controller of electric 220 provides driving power VDDA according to control signal Fd.When control signal Fd comprised positive polarity control signal and negative polarity control signal, two different positive and negative polarity control signals of 220 correspondences of power-supply controller of electric produced respectively positive and negative polarity driving power.That is to say that when control signal Fd comprised positive polarity control signal and negative polarity control signal, driving power VDDA then comprised respectively positive and negative polarity driving power.
Then please refer to Fig. 3, Fig. 3 shows an embodiment of the power-supply controller of electric of the embodiment of the invention.Power-supply controller of electric 220 comprises positive polarity power generation circuit 221 and negative polarity power generation circuit 222.Positive polarity control signal FdP among the positive polarity power generation circuit 221 reception control signal Fd and negative polarity control signal FdN among the negative polarity power generation circuit 222 reception control signal Fd.Positive and negative polarity power generation circuit 221,222 is also respectively according to just reaching negative polarity control signal FdP, FdN to produce simultaneously positive polarity driving power VDDAP and negative polarity driving power VDDAN.
Below please refer to Fig. 4 A～Fig. 4 F, Fig. 4 A～Fig. 4 F shows respectively the different embodiments of the positive and negative polarity power generation circuit of the embodiment of the invention.In the demonstration of Fig. 4 A, positive polarity power generation circuit 221 comprises bleeder circuit 410 and single gain amplifier UG1.Bleeder circuit 410 is serially connected between voltage source V CC and earth terminal GND, and receiver voltage source VCC and positive polarity control signal FdP, and according to positive polarity control signal FdP voltage source V CC is carried out dividing potential drop, to produce branch pressure voltage VAP.Single gain amplifier UG1 then is coupled to bleeder circuit 410, and receives branch pressure voltage VAP to produce positive polarity driving power VDDAP.
In the present embodiment, bleeder circuit 410 is to utilize variable resistor R51 and R52 serial connection to consist of.Wherein, bleeder circuit 410 can come among adjusting resistance R51 and the R52 resistance value of one of them at least to change the voltage swing of branch pressure voltage VAP according to reception positive polarity control signal FdP.The driving force that single gain amplifier UG1 then receives branch pressure voltage VAP and strengthens branch pressure voltage VAP produces positive polarity driving power VDDAP, and wherein positive polarity driving power VDDAP is identical with the voltage swing of branch pressure voltage VAP.
In addition, then can be connected in series electric capacity of voltage regulation Cp between the output terminal of single gain amplifier UG1 (producing the end points of positive polarity driving power VDDAP) and earth terminal GNDA.
The shown positive polarity power generation circuit 221 of the negative polarity power generation circuit 222 that Fig. 4 B shows and Fig. 4 A is identical at circuit configurations.Bleeder circuit 420 wherein is made of resistance R 53 and R54 serial connection.Bleeder circuit 420 also produces branch pressure voltage VAN according to negative polarity control signal FdN.The driving force that single gain amplifier UG2 then receives branch pressure voltage VAN and strengthens branch pressure voltage VAN is to produce negative polarity driving power VDDAN.In addition, the electric capacity of voltage regulation Cn of negative polarity power generation circuit 222 is serially connected between the output terminal and earth terminal GNDA of single gain amplifier UG2.
Fig. 4 C then shows the another kind of embodiment of positive polarity power generation circuit 221.In the demonstration of Fig. 4 C, positive polarity power generation circuit 221 comprises operational amplifier OP1 and feedback circuit 430.The input end of operational amplifier OP1 receives reference voltage VREFP, and its another input end then is coupled to feedback circuit 430, and its output terminal produces positive polarity driving power VDDAP.Feedback circuit 430 is coupled to the output terminal of operational amplifier OP1 in addition.Feedback circuit 430 in order to foundation positive polarity control signal FdP dividing potential drop positive polarity driving power VDDAP to produce branch pressure voltage VBP.And, the input end that the branch pressure voltage VBP that feedback circuit 430 and transmitting produces couples to operational amplifier OP1 and feedback circuit 430.
At this, feedback circuit 430 is to utilize variable resistor R61 and R62 serial connection to consist of.Wherein, feedback circuit 430 can come among adjusting resistance R61 and the R62 at least resistance value of one of them according to reception positive polarity control signal FdP.Because the magnitude of voltage (reference voltage VREFP and branch pressure voltage VBP) on two input ends of operational amplifier OP1 must be identical, therefore, by changing at least resistance value of one of them of resistance R 61 and R62, can adjust the magnitude of voltage of positive polarity driving power VDDAP.
The shown positive polarity power generation circuit 221 of the negative polarity power generation circuit 222 that Fig. 4 D shows and Fig. 4 C is identical at circuit configurations.Wherein, the negative polarity power generation circuit 222 that Fig. 4 D shows utilizes according to negative polarity control signal FdN and adjusts at least resistance value of one of them of resistance R 63 in the feedback circuit 440 and R64, be under the identical mechanism by reference voltage VREFN and branch pressure voltage VBN again, come the magnitude of voltage of negative polarity driving power VDDAN that operational amplifier OP2 is produced to adjust.
Fig. 4 E then shows another embodiment of positive polarity power generation circuit 221.In the demonstration of Fig. 4 E, positive polarity power generation circuit 221 is by 401 construction of power supply changeover device, and power supply changeover device 401 comprises power-switching circuit 450, bleeder circuit 460, error amplifier EA and pulse-width modulation signal generating circuit 470.Power-switching circuit 450 receives input voltage VIN.Have power transistor PT 1 in the power-switching circuit 450, power-switching circuit 450 and according to the conducting of power transistor PT1 and cut off action input voltage is carried out boost action, and use and produce positive polarity driving power VDDAP.
The input end of error amplifier EA receives the dividing potential drop result of bleeder circuit 460.In addition, another input end of error amplifier EA receives the voltage that is produced according to positive polarity control signal FdP by reference voltage generator 490.
Pulse-width modulation signal generating circuit 470 receives the poor of voltage that error amplifier EA receive according to its input end, and produces according to this pulse-width signal PWM.Pulse-width signal PWM is transferred into the grid of power transistor PT1, with the change action of power ratio control transistor PT1.
470 of pulse-width modulation signal generating circuits comprise operational amplifier OP3 and triangular wave generator 471, the difference that the triangular wave that operational amplifier OP3 wherein produces for triangular wave generator 471 and error amplifier EA produce compares, and uses and produce pulse-width signal PWM.
Subsidiary one carries, and also comprises at output terminal and the bleeder circuit 460 of error amplifier EA being connected in series compensating circuit 480.
Please pay special attention at this, when the embodiment that utilizes Fig. 4 E came construction positive polarity power generation circuit 221,222 corresponding of negative polarity power generation circuits can utilize such as the embodiment as shown in Fig. 4 B or Fig. 4 D and come construction.Yet, different with the embodiment that Fig. 4 B or Fig. 4 D are shown, come at the embodiment that utilizes Fig. 4 E under the condition of construction positive polarity power generation circuit 221, utilize the negative polarity power generation circuit 222 of the embodiment institute construction of Fig. 4 B or Fig. 4 D, operational amplifier wherein, bleeder circuit and single gain amplifier can change to and were coupled to positive polarity driving power VDDAP by originally being couple to voltage source V CC.
Fig. 4 F then shows another embodiment of positive polarity power generation circuit 221 and negative polarity power generation circuit 222.In the demonstration of Fig. 4 F, power supply changeover device 402 comprises power-switching circuit 450, bleeder circuit 460, error amplifier EA and pulse-width modulation signal generating circuit 470.Power-switching circuit 450 receives input voltage VIN.Has power transistor PT 1 in the power-switching circuit 450, power-switching circuit 450 and according to the conducting of power transistor PT1 and cut off action input voltage is carried out boost action.Bleeder circuit 460 couples the output terminal of power-switching circuit 450, and power-switching circuit 450 output voltages are carried out dividing potential drop.The input end of error amplifier EA receives the dividing potential drop result of bleeder circuit 460.In addition, another input end of error amplifier EA receives the voltage that is produced by reference voltage generator 490, and the output terminal of error amplifier EA is connected in series compensating circuit 480 with bleeder circuit 460.Electric capacity of voltage regulation is in order to realize positive polarity power generation circuit 221 and negative polarity power generation circuit 222.Positive polarity control signal FdP among the positive polarity power generation circuit 221 reception control signal Fd and negative polarity control signal FdN among the negative polarity power generation circuit 222 reception control signal Fd.Positive and negative polarity power generation circuit 221,222 is also respectively according to just reaching negative polarity control signal FdP, FdN to produce simultaneously positive polarity driving power VDDAP and negative polarity driving power VDDAN.
Please pay special attention to, among the embodiment about earlier figures 4A～Fig. 4 D, employed electric capacity of voltage regulation Cp and Cn all can utilize the formed capacitance group that replaces of electric capacity of the serial connection in the shown positive and negative polarity power generation circuit 221 and 222 of Fig. 4 F to replace in the positive and negative polarity power generation circuit wherein.More specifically illustrate, take Fig. 4 A as example, exactly electric capacity of voltage regulation Cp is utilized the electric capacity of a plurality of serial connections to replace, and the capacitance series of these serial connections is between positive polarity driving power VDDAP and earth terminal GNDA.The electric capacity of these serial connections then can align polarity driven power vd DAP and carry out dividing potential drop, and selects by a plurality of switches and the positive polarity control signal FdP that shows such as Fig. 4 F, so that the more magnitude of voltage of the driving voltage of more options to be provided.
Below also please refer to Fig. 5, Fig. 5 shows the driving method of the display of one embodiment of the invention.Wherein, the step of driving method comprises: at first, detect a plurality of demonstration data, and produce control signal (S510) according to the maximal value that shows data.Then, provide driving power (S520) according to control signal.And according to driving power and show that respectively each gamma voltage corresponding to data produces the corresponding driving voltage (S530) that respectively shows data.In addition, about the implementation detail in the above-mentioned steps, at the aforesaid embodiment of the present invention and embodiment detailed explanation is arranged, below do not give unnecessary details for this reason.
In sum, the present invention utilizes and shows that data detector judges the maximal value that shows data, and dynamically adjusts the driving power that power-supply controller of electric will produce according to the gamma voltage that this maximal value institute correspondence will produce.Thus, the maximum display brightness that the driving power that source electrode driver receives can will drive in response to display is dynamically adjusted, and effectively reduces because of the excessive driving power of unsuitable generation, and causes the consume of power.
Although the present invention discloses as above with embodiment, so it is not to limit the present invention, any under those of ordinary skill in the technical field, when can doing a little change and retouching, and do not break away from the spirit and scope of the present invention.
Claims (15)
1. the drive unit of a display comprises:
One shows data detector, shows data in order to detect most, and produces a control signal according to those maximal values that show data, and wherein those show corresponding most the gamma voltages of data;
One power-supply controller of electric couples this demonstration data detector, receives this control signal, and provides a driving power according to this control signal; And
The one source pole driver couples this power-supply controller of electric, receives this driving power with as operating power, and according to this driving power and respectively this gamma voltage produce a corresponding respectively driving voltage of these demonstration data.
2. the drive unit of display according to claim 1, wherein those gamma voltages comprise most positive polarity gamma voltages and most negative polarity gamma voltages, this control signal comprises a positive polarity control signal and a negative polarity control signal, and this driving power comprises a positive polarity driving power and a negative polarity driving power.
3. the drive unit of display according to claim 2, wherein this demonstration data detector calculates those and shows corresponding those positive polarity gamma voltages and those negative polarity gamma voltages of data, and this demonstrations data detector also produces respectively this positive polarity control signal and this negative polarity control signal according to the maximal value of the difference of the maximal value of the difference of those positive polarity gamma voltages and a shared voltage and those negative polarity gamma voltages and this share voltage.
4. the drive unit of display according to claim 2, wherein this power-supply controller of electric comprises:
One positive polarity power generation circuit couples this demonstration data detector, receive and according to this positive polarity control signal to produce this positive polarity driving power; And
One negative polarity power generation circuit couples this demonstration data detector, receive and according to this negative polarity control signal to produce this negative polarity driving power.
5. the drive unit of display according to claim 4, wherein,
This positive polarity power generation circuit comprises:
One first bleeder circuit receives and according to this positive polarity control signal one voltage source is carried out dividing potential drop, and produces one first branch pressure voltage; And
One first single gain amplifier couples this first bleeder circuit, receives this first branch pressure voltage to produce this positive polarity driving power;
This negative polarity power generation circuit comprises:
One second bleeder circuit receives and according to this negative polarity control signal this voltage source is carried out dividing potential drop, and produces one second branch pressure voltage; And
One second single gain amplifier couples this second bleeder circuit, receives this second branch pressure voltage to produce this negative polarity driving power.
6. the drive unit of display according to claim 4, wherein,
This positive polarity power generation circuit comprises:
One first operational amplifier, its first input end receive one first reference voltage, and its output terminal produces this positive polarity driving power; And
One first feedback circuit, be serially connected between the second input end of the output terminal of this first operational amplifier and this first operational amplifier, in order to according to this this positive polarity driving power of positive polarity control signal dividing potential drop to produce one first branch pressure voltage, this first feedback circuit also transmits this first branch pressure voltage to the second input end of this first operational amplifier;
This negative polarity power generation circuit comprises:
One second operational amplifier, its first input end receive one second reference voltage, and its output terminal produces this negative polarity driving power; And
One second feedback circuit, be serially connected between the second input end of the output terminal of this second operational amplifier and this second operational amplifier, in order to according to this this negative polarity driving power of negative polarity control signal dividing potential drop to produce one second branch pressure voltage, this second feedback circuit also transmits this second branch pressure voltage to the second input end of this second operational amplifier.
7. the drive unit of display according to claim 4, wherein, this positive polarity power generation circuit comprises:
One power supply changeover device couples this demonstration data detector, receive and according to this positive polarity control signal so that an input voltage is carried out a boost action, produce this positive polarity driving power.
8. the drive unit of display according to claim 4, wherein this negative polarity power generation circuit comprises:
One first operational amplifier, its first input end receive one first reference voltage, and its output terminal produces this negative polarity driving power; And
One first feedback circuit, be serially connected between the second input end of the output terminal of this first operational amplifier and this first operational amplifier, in order to should bear the positive polarity driving power to produce one first branch pressure voltage according to this negative polarity control signal dividing potential drop, this first feedback circuit also transmits this first branch pressure voltage to the second input end of this first operational amplifier
Wherein this first operational amplifier receives this positive polarity driving power and thinks its working power.
9. the drive unit of display according to claim 4, wherein this negative polarity power generation circuit comprises:
One first bleeder circuit receives and according to this negative polarity control signal this negative polarity driving power is carried out dividing potential drop, and produces one first branch pressure voltage; And
One first single gain amplifier couples this first bleeder circuit, receives this first branch pressure voltage producing this negative polarity driving power,
Wherein this first single gain amplifier receives this positive polarity driving power and thinks its working power.
10. the drive unit of display according to claim 7, wherein this power supply changeover device comprises:
One power-switching circuit receives this input voltage, has a power transistor, and this power-switching circuit carries out this boost action according to conducting and the cut-out action of this power transistor to this input voltage, and uses this positive polarity driving power of generation;
One bleeder circuit couples this power-switching circuit, and according to this positive polarity control signal this positive polarity driving power is carried out dividing potential drop;
One error amplifier, its input end receive respectively dividing potential drop result and a reference voltage of this bleeder circuit; And
One pulse-width modulation signal generating circuit couples the output terminal of this error amplifier, produces a pulse-width signal according to the voltage of the output terminal of this error amplifier, and wherein this pulse-width signal is in order to conducting or cut off this power transistor.
11. the drive unit of display according to claim 7, wherein this power supply changeover device comprises:
One power-switching circuit receives this input voltage, has a power transistor, and this power-switching circuit carries out this boost action according to conducting and the cut-out action of this power transistor to this input voltage, and uses this positive polarity driving power of generation;
One bleeder circuit couples this power-switching circuit, and this positive polarity driving power is carried out dividing potential drop;
One error amplifier, its first input end receives the dividing potential drop result of this bleeder circuit, and the second input end couples a reference voltage, and according to this positive polarity control signal this reference voltage is adjusted; And
One pulse-width modulation signal generating circuit couples the output terminal of this error amplifier, produces a pulse-width signal according to the voltage of the output terminal of this error amplifier, and wherein this pulse-width signal is in order to conducting or cut off this power transistor.
12. the drive unit of display according to claim 7, wherein this power supply changeover device comprises:
One power-switching circuit in order to receive this input voltage, has a power transistor, and this power-switching circuit carries out this boost action according to conducting and the cut-out action of this power transistor to this input voltage;
One bleeder circuit couples this power-switching circuit, and this positive polarity driving power is carried out dividing potential drop;
One error amplifier, its input end receive respectively dividing potential drop result and a reference voltage of this bleeder circuit;
One pulse-width modulation signal generating circuit couples the output terminal of this error amplifier, produces a pulse-width signal according to the voltage of the output terminal of this error amplifier, and wherein, this pulse-width signal is in order to conducting or cut off this power transistor; And
One electric capacity of voltage regulation, this electric capacity of voltage regulation receive this positive polarity control signal and this negative polarity control signal, and produce this positive polarity driving power and this negative polarity driving power according to this positive polarity control signal and this negative polarity control signal.
13. the driving method of a display comprises
Detect most and show data, and produce a control signal according to those maximal values that show data, wherein those show corresponding most the gamma voltages of data;
Provide a driving power according to this control signal; And
And according to this driving power and respectively this gamma voltage produce a corresponding respectively driving voltage of these demonstration data.
14. the driving method of display according to claim 13, wherein those gamma voltages comprise most positive polarity gamma voltages and most negative polarity gamma voltages, this control signal comprises a positive polarity control signal and a negative polarity control signal, and this driving power comprises a positive polarity driving power and a negative polarity driving power.
15. the driving method of display according to claim 14 wherein detects those and shows data, and comprises according to those steps that show that the maximal value of data produces this control signal:
Calculate those and show corresponding those positive polarity gamma voltages and those negative polarity gamma voltages of data; And
The maximal value of sharing the difference of the maximal value of difference of voltage and those negative polarity gamma voltages and this share voltage according to those positive polarity gamma voltages and produces respectively this positive polarity control signal and this negative polarity control signal.
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Application publication date: 20130306 |