CN101640032A - Electronic device for enhancing voltage drive efficiency and related LCD - Google Patents
Electronic device for enhancing voltage drive efficiency and related LCD Download PDFInfo
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- CN101640032A CN101640032A CN200810144126A CN200810144126A CN101640032A CN 101640032 A CN101640032 A CN 101640032A CN 200810144126 A CN200810144126 A CN 200810144126A CN 200810144126 A CN200810144126 A CN 200810144126A CN 101640032 A CN101640032 A CN 101640032A
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Abstract
The invention relates to an electronic device for enhancing voltage drive efficiency and a related LCD. The electronic device is used for a source electrode driver to enhance voltage drive efficiency,comprises a reference voltage generation device, a plurality of first connection lines, a second connection line with line width larger than the first connection lines, a data statistic unit and a reference voltage modulation module. The reference voltage generation device is used for generating a plurality of gray scale reference voltages; each first connection line and the second connection line are used for transmitting a gray scale reference voltage; the data statistic unit is used for statistics of a plurality of gray scale data values so as to generate a statistic result which instructsthe maximum gray scale data value and corresponds to the gray scale reference voltage; and the reference voltage modulation module is used for adjusting the plurality of first connection lines and the transmission corresponding relation between the second connection line and the plurality of gray scale reference voltages according to the statistic result.
Description
Technical field
The present invention relates to electronic installation and related liquid crystal display thereof that a kind of one source pole driver booster tension that is used for a LCD drives efficient, especially relate to a kind of driving efficient that promotes gray scale reference voltages, and then reduce equivalent capacity the whole unit electronic installation and the related liquid crystal display thereof in required duration of charging.
Background technology
LCD has that external form is frivolous, power consumption is few and characteristic such as radiationless pollution, has been widely used on the information products such as computer system, mobile phone, PDA(Personal Digital Assistant).The principle of work of LCD is to utilize liquid crystal molecule under different ordered states, light had different polarizations or refraction effect, therefore can control the amount of penetrating of light via the liquid crystal molecule of different ordered states, further produce the output light of varying strength, and red, blue, the green glow of different GTG intensity.
Please refer to Fig. 1, Fig. 1 is thin films transistors (Thin Film Transistor, TFT) synoptic diagram of LCD 10.LCD 10 comprises a display panels (LCD Panel) 100, one sequential control circuit 102, a data line signal output circuit 104 and one scan line signal output apparatus 106.Display panels 100 is made of two substrates (Substrate), and is filled with liquid crystal material between two substrates.One substrate is provided with many data lines (Data Line) 110, many sweep traces perpendicular to data line 110 (Scan Line, or claim grid line, Gate Line) 112 and a plurality of thin film transistor (TFT) 114.For ease of explanation, only show four thin film transistor (TFT)s 114 among Fig. 1, in fact, each data line 110 all is connected with a thin film transistor (TFT) 114 with the junction (Intersection) of sweep trace 112 in the display panels 100, that is thin film transistor (TFT) 114 is distributed on the display panels 100 in the mode of matrix, each data line 110 is corresponding to the delegation (Column) of LCD 10, and sweep trace 112 is listed as (Row) corresponding to one of LCD 10, and each thin film transistor (TFT) 114 is corresponding to a pixel (Pixel).In addition, the circuit characteristic that two substrates constituted of display panels 100 can be considered an equivalent capacitor cell 116.
In LCD 10, sequential control circuit 102 can produce control signal and input to data line signal output circuit 104 and scanning-line signal output circuit 106 respectively.106 pairs of sweep traces of scanning-line signal output circuit, 112 inputs, one pulse makes thin film transistor (TFT) 114 conductings, allowing the drive voltage signal of 104 input data lines 110 of data line signal output circuit can import equivalent capacity unit 116, thereby reach GTG (Gray Level) state of the corresponding pixel of control via thin film transistor (TFT) 114.
When LCD 10 was a large-sized monitor, data line signal output circuit 104 was made up of the multiple source driver usually, and each source electrode driver is responsible for the signal output of many data lines 110.The main function of source electrode driver is that the digital gray level data-switching that will receive becomes analog drive voltage, and carries out Gamma correction and driving voltage Polarity Control or the like.
Please refer to Fig. 2, Fig. 2 is the schematic internal view of the one source pole driver 20 of Fig. 1 data line signal output circuit 104.Source electrode driver 20 is coupled to a display panels 26 that can show 64 kinds of GTGs (with " 0 " to " 63 " expression), and comprises a reference voltage generating device 22, a data latches 24, digital to analog converter DAC (1)～DAC (640), connecting line L1～L64 and operational amplifier OP (1)～OP (64).Data latches 24 is used for receiving the luma data value GD0～GD639 of 6 (the GTG values of " 0 " to " 63 "), and it corresponds respectively to the equivalent capacity unit C1～C640 on digital to analog converter DAC (1)～DAC (640) and the display panels 26.Reference voltage generating device 22 produces gray scale reference voltages GV0～GV63, and when source electrode driver 20 had the Gamma correction function, gray scale reference voltages GV0～GV63 also was considered as gamma corrected voltage.Operational amplifier OP (1)～OP (64) promotes gray scale reference voltages GV0～GV63 by connecting line L1～L64 respectively and gives digital to analog converter DAC (1)～DAC (640).For asking concise explanation, suppose that herein the voltage gain of operational amplifier OP (1)～OP (64) is 1.Digital to analog converter DAC (1)～DAC (640) selects corresponding connecting line according to GD 0～GD639, to export corresponding gray scale reference voltages to equivalent capacity unit C1～C640.For instance, reach " 63 " if luma data value GD0 and GD1 are respectively " 32 ", then digital to analog converter DAC (1) and DAC (2) select connecting line L33 and L64 respectively, with output gray scale reference voltages GV32 and GV63.
As from the foregoing, when multiple digital more when analog converter receives identical luma data value, to select same connecting line simultaneously, make that the load of corresponding operational amplifier is heavy more, be not easy to promote gray scale reference voltages, cause the required duration of charging of equivalent capacity unit also to heighten, cause showing that usefulness descends.
Summary of the invention
Therefore, fundamental purpose of the present invention is to provide a kind of one source pole driver booster tension that is used for a LCD to drive the electronic installation and the LCD thereof of efficient.
The present invention discloses the electronic installation that a kind of one source pole driver booster tension that is used for a LCD drives efficient, and it includes a reference voltage generating device, a plurality of first connecting line, one second connecting line, a data statistics unit and a reference voltage modulation module.This reference voltage generating device is used for producing a plurality of gray scale reference voltages.Each first connecting line is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages.This second connecting line is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and wherein the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines.This data statistics unit is used for adding up a plurality of luma data values, and to produce a statistics result, wherein maximum luma data are worth pairing gray scale reference voltages in these these a plurality of gray scale reference voltages of statistics indication.This reference voltage modulation module is coupled between this reference voltage generating device and this a plurality of first connecting lines and this second connecting line, be used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by maximum luma data in these these a plurality of gray scale reference voltages of second connecting line transmission.
The present invention also discloses the method that a kind of one source pole driver booster tension that is used for a LCD drives efficient, it includes provides a plurality of first connecting lines and one second connecting line, each first connecting line and this second connecting line are used for transmitting a gray scale reference voltages of a plurality of gray scale reference voltages, and the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines; Add up a plurality of luma data values, to produce a statistics result, maximum luma data are worth pairing gray scale reference voltages in these these a plurality of gray scale reference voltages of statistics indication; And according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by maximum luma data in these these a plurality of gray scale reference voltages of second connecting line transmission.
But the present invention also discloses the LCD that a kind of booster tension drives efficient, includes a panel and one source pole driver.This panel comprises a plurality of equivalent capacitys unit and has the ability that shows a plurality of GTGs, and this source electrode driver is coupled to this panel and comprise a reference voltage generating device, a plurality of operational amplifier, a plurality of first connecting line, one second connecting line, a data statistics unit, a data-modulated unit, a reference voltage modulation module and a plurality of digital to analog converter.This reference voltage generating device is used for producing a plurality of gray scale reference voltages.These a plurality of operational amplifiers are used for promoting these a plurality of gray scale reference voltages.Each first connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages.This second connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and wherein the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines.This data statistics unit is used for adding up a plurality of luma data values corresponding to this a plurality of equivalent capacitys unit, to produce a statistics result, wherein this statistics indicates in these a plurality of gray scale reference voltages at most that luma data are worth pairing gray scale reference voltages and corresponding luma data value.This data-modulated unit is coupled to this data statistics unit, is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs.This reference voltage modulation module is used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, be worth pairing gray scale reference voltages to transmit maximum luma data by this second connecting line.These a plurality of digital to analog converters are coupled to a sequence by these many first connecting lines and this at least one second connecting line, and each digital to analog converter is used for adjusting data value according to a GTG of these a plurality of GTGs adjustment data values, select one first connecting line or this second connecting line of these a plurality of first connecting lines, to export the equivalent capacitor cell of corresponding gray scale reference voltages to this a plurality of equivalent capacitys unit.Wherein, be worth the GTG adjustment data value of the digital to analog converter of pairing gray scale reference voltages corresponding to maximum luma data in these a plurality of digital to analog converters, select this second connecting line according to correspondence.
But the present invention also discloses the LCD that a kind of booster tension drives efficient, includes a panel and one source pole driver.This panel comprises a plurality of equivalent capacitys unit and has the ability that shows a plurality of GTGs, and this source electrode driver is coupled to this panel and comprise a reference voltage generating device, a plurality of operational amplifier, a plurality of first connecting line, one second connecting line, one the 3rd connecting line, a data statistics unit, a data-modulated unit, a reference voltage modulation module and a plurality of digital to analog converter.This reference voltage generating device is used for producing a plurality of gray scale reference voltages.These a plurality of operational amplifiers are used for promoting these a plurality of gray scale reference voltages.Each first connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages.This second connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and wherein the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines.The 3rd connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and wherein the line width of the 3rd connecting line is greater than the line width of these a plurality of first connecting lines.This data statistics unit is used for adding up a plurality of luma data values corresponding to this a plurality of equivalent capacitys unit, to produce a statistics result.This statistics indicates in these a plurality of gray scale reference voltages at most that luma data are worth pairing gray scale reference voltages and corresponding luma data value, and inferior many luma data are worth pairing gray scale reference voltages and corresponding luma data value.This data-modulated unit is coupled to this data statistics unit, is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs.This reference voltage modulation module, be used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, be worth pairing gray scale reference voltages to transmit maximum luma data, and be worth pairing gray scale reference voltages by the 3rd connecting line transmission time many luma data by this second connecting line.These a plurality of digital to analog converters are coupled to a sequence by these many first connecting lines, this second connecting line and the 3rd connecting line, and each digital to analog converter is used for adjusting data value according to a GTG of these a plurality of GTGs adjustment data values, select one first connecting line, this second connecting line or the 3rd connecting line of these a plurality of first connecting lines, to export the equivalent capacitor cell of corresponding gray scale reference voltages to this a plurality of equivalent capacitys unit.Wherein, be worth the GTG adjustment data value of the digital to analog converter of pairing gray scale reference voltages corresponding to maximum luma data in these a plurality of digital to analog converters according to correspondence, select this second connecting line, and the digital to analog converter that is worth pairing gray scale reference voltages corresponding to inferior many luma data is adjusted data value according to the GTG of correspondence, selects the 3rd connecting line.
Description of drawings
Fig. 1 is the synoptic diagram of thin films transistors LCD.
Fig. 2 is the schematic internal view of known one source pole driver
Fig. 3 is used for the synoptic diagram of the one source pole driver of a LCD for one embodiment of the invention.
Fig. 4 is an embodiment synoptic diagram of reference voltage modulation module in Fig. 3 source electrode driver of the present invention.
Fig. 5 is the synoptic diagram of the embodiment of the invention one flow process.
Fig. 6 is used for the synoptic diagram of the one source pole driver of a LCD for second embodiment of the invention.
Fig. 7 is an embodiment synoptic diagram of reference voltage modulation module in Fig. 6 source electrode driver of the present invention.
The reference numeral explanation
10 LCD
100,26 display panels
102 sequential control circuits
104 data line signal output circuits
106 scanning-line signal output circuits
110 data lines
112 sweep traces
114 thin film transistor (TFT)s
116, C1, C2, C639, C640 equivalent capacity unit
20,30,60 source electrode drivers
22 reference voltage generating devices
24 data latches
DAC (1), DAC (2), DAC (639), DAC (640) digital to analog converter
L1, L2, L63, L64, L1 ', L64 ' connecting line
OP (1), OP (2), OP (63), OP (64) operational amplifier
GD0, GD1, GD638, GD639 luma data value
GV0, GV1, GV62, GV63 gray scale reference voltages
300,600 data statistics unit
310,610 data-modulated unit
320,620 reference voltage modulation modules
STA_DATA, STA_DATA1 statistics
GD0 ', GD1 ', GD638 ', GD639 ' GTG are adjusted data value
50 flow processs
500,502,504,506,508,510 steps
MUX (1), MUX (2), MUX (63), MUX (64), MUX ' (1), MUX ' (2), MUX ' (63), MUX ' (64) multiplexer
SC1, SC2, SC63, SC64, SC1 ', SC2 ', SC63 ', SC64 ' select signal
Embodiment
Please refer to Fig. 3, Fig. 3 is used for the synoptic diagram of the one source pole driver 30 of a LCD for one embodiment of the invention.Source electrode driver 30 includes a reference voltage generating device 22, a data latches 24, digital to analog converter DAC (1) DAC (640), a connecting line L1 ', connecting line L2～L64, operational amplifier OP (1)～OP (64), a data statistics unit 300, a data-modulated unit 310 and a reference voltage modulation module 320.Source electrode driver 30 can be used for the data line signal output circuit 104 in similar Fig. 1 LCD 10 frameworks, and its subelement is identical with Fig. 2 source electrode driver 20, so use same names and symbolic representation.Therefore, source electrode driver 30 is used for by digital to analog converter DAC (1)～DAC (640), selects and the equivalent capacity unit C1～C640 of output gray scale reference voltages GV0～GV63 to the display panels 26.Gray scale reference voltages GV0～GV63 corresponds respectively to " 0 " GTG to " 63 ".
In source electrode driver 30, the line width of connecting line L1 ' is greater than the line width of connecting line L2～L64, to promote the driving force of operational amplifier.For example, the line width of connecting line L1 ' is three times of line width of connecting line L2～L64, and then the impedance of connecting line L1 ' is lower than three times compared to connecting line L2～L64, therefore can promote three times of the driving forces of operational amplifier.Data statistics unit 300 is coupled to data latches 24, be used for adding up luma data value GD0～GD639 corresponding to equivalent capacity unit C1～C640, to produce statistics STA_DATA as a result, it indicates maximum luma data values corresponding simultaneously gray scale reference voltages and corresponding luma data value.Data-modulated unit 310 is coupled to data statistics unit 300 and data latches 24, is used for according to statistics STA_DATA, adjusts the data content of luma data value GD0～GD639, adjusts data value GD0 '～GD639 ' with the output GTG.Reference voltage modulation module 320 is arranged between data latches 24 and operational amplifier OP (the 1)～OP (640), be used for according to statistics STA_DATA, adjust the transmission corresponding relation of connecting line L2～L64 and connecting line L1 ' and gray scale reference voltages GV0～GV63, to transmit the corresponding simultaneously gray scale reference voltages of maximum luma data values by connecting line L1 '.Digital to analog converter DAC (1)～DAC (640) adjusts data value GD0 '～GD639 ' according to GTG respectively, selects relevant connecting line, to export corresponding gray scale reference voltages to equivalent capacity unit C1～C640.For instance, be " 0 " if GTG is adjusted data value GD0 ', then digital to analog converter DAC (1) selects connecting line L1 '; If it is " 32 " that GTG is adjusted data value GD0 ', then digital to analog converter DAC (1) selects connecting line L33.
Under default situation, reference voltage modulation module 320 is respectively coupled to gray scale reference voltages GV0～GV63 with operational amplifier OP (1)～OP (64).After statistics STA_DATA produces, the reference voltage modulation module must be adjusted the transmission corresponding relation of connecting line and gray scale reference voltages, be worth the GTG adjustment data value of the digital to analog converter of pairing gray scale reference voltages to allow corresponding to maximum luma data, select connecting line L1 ' according to correspondence.
Lift an example (A) so that the running notion of the embodiment of the invention more specifically to be described.In example (A), luma data value GD0～GD9 that tentation data latch 24 received is that " 0 ", GD10～GD19 are that " 50 ", GD20～GD615 are that " 32 ", GD616～GD625 are " 40 ", and GD626～GD639 is " 24 ".Data statistics unit 300 will count 10 luma data values corresponding to gray scale reference voltages GV0,14 luma data values corresponding to gray scale reference voltages GV24,596 luma data values corresponding to 32,10 luma data values of gray scale reference voltages GV corresponding to gray scale reference voltages GV40, and 10 luma data values are corresponding to gray scale reference voltages GV50.Therefore, statistics STA_DATA indication gray scale reference voltages GV 32 and luma data value GD20～GD615.In the case, data-modulated unit 310 is adjusted into " 32 " with luma data value GD0～GD9 by " 0 ", and luma data value GD20～GD615 is adjusted into " 0 " by " 32 ".That is to say that GTG is adjusted data value, and GD0 '～GD9 ' is " 32 ", GTG is adjusted data value, and GD20 '～GD615 ' is " 0 ", and all the other GTGs adjustment data values are identical with the luma data value.On the other hand, reference voltage modulation module 320 is coupled to gray scale reference voltages GV32 with operational amplifier OP (1), and operational amplifier OP (33) is coupled to gray scale reference voltages GV0, and all the other use the default setting that couples.Thus, digital to analog converter DAC (1)～DAC (10) will be by connecting line L33, and GV0 is to equivalent capacity unit C1～C10 for the output gray scale reference voltages; Digital to analog converter DAC (21)～DAC (616) will be by connecting line L1 ', and GV32 is to equivalent capacity unit C21～C616 for the output gray scale reference voltages.
Therefore, though being arranged, 596 digital to analog converters need export gray scale reference voltages GV32 simultaneously, then help to promote whole driven power but utilize the lower connecting line L1 ' of impedance to replace connecting line L33 to transmit, alleviated the load effect of capacitor cell.
Please refer to Fig. 4, Fig. 4 is an embodiment synoptic diagram of reference voltage modulation module 320 in the source electrode driver 30 of the present invention.Reference voltage modulation module 320 comprises multiplexer MUX (1)～MUX (64), is used for receiving gray scale reference voltages by input end, and according to selecting signal SC1～SC64, exports selected gray scale reference voltages to corresponding operational amplifier.64 input ends of multiplexer MUX (1) are used for receiving gray scale reference voltages GV0～GV63 respectively.2 input ends of multiplexer MUX (2)～(64) are used for reception itself corresponding gray scale reference voltages and GV0 respectively.Select signal SC1～SC64 to produce according to statistics STA_DATA.
What pay special attention to is, reference voltage modulation module 320 is not limited to be arranged between data latches 24 and operational amplifier OP (the 1)～OP (64), also can be arranged between operational amplifier OP (1)～OP (64) and connecting line L1 ' and the L2～L64, it still possesses the transmission corresponding relation of adjusting connecting line L1 ' and L2～L64 and gray scale reference voltages GV0～GV63.
Please refer to Fig. 5, Fig. 5 is the synoptic diagram of the embodiment of the invention one flow process 50.The operation workflow of flow process 50 explanation source electrode drivers 30 is in order to promote the driving efficient of gray scale reference voltages.Flow process 50 comprises following steps:
Step 500: beginning.
Step 502: statistics luma data value GD0～GD639, to produce statistics STA_DATA, maximum luma data are worth pairing gray scale reference voltages and corresponding luma data value in these a plurality of gray scale reference voltages to indicate.
Step 504: according to statistics STA_DATA, adjust the data content of luma data value GD0～GD639, adjust data value GD0 '～GD639 ' to digital to analog converter DAC (1)～DAC (640) with the output GTG, and then allow the digital to analog converter that is worth pairing gray scale reference voltages corresponding to maximum luma data adjust data value according to the GTG of correspondence, select connecting line L1 '.
Step 506: according to statistics STA_DATA, adjust the transmission corresponding relation of connecting line L1 ' and L2～L64 and gray scale reference voltages GV0～GV63, to be worth pairing gray scale reference voltages by the maximum luma data of connecting line L1 ' transmission.
Step 508: digital to analog converter DAC (1)～DAC (640) adjusts data value GD0 '～GD639 ' according to GTG respectively, selects relevant connecting line, to export corresponding gray scale reference voltages to equivalent capacity unit C1～C640.
Step 510: finish.
According to flow process 50, the embodiment of the invention is according to statistics STA_DATA, adjustment is from the transmission relation corresponding to luma data value GD0～GD639 and the gray scale reference voltages GV0～GV63 and the connecting line of panel pixel, allowing the gray scale reference voltages of the maximum luma data value correspondences of the bigger connecting line L1 ' of line width transmission, and then reduce the ultimate load of single operational amplifier.Because flow process 50 is used for illustrating the operation workflow of source electrode driver 30, so each step detail operations please refer to above stated specification.
Please refer to Fig. 6, Fig. 6 is used for the synoptic diagram of the one source pole driver 60 of a LCD for second embodiment of the invention.Source electrode driver 60 includes a reference voltage generating device 22, a data latches 24, digital to analog converter DAC (1)～DAC (640), a connecting line L1 ', a connecting line L64 ', connecting line L2～L63, operational amplifier OP (1)～OP (64), a data statistics unit 600, a data-modulated unit 610 and a reference voltage modulation module 620.Source electrode driver 60 is followed the basic framework of source electrode driver 30, so similar elements is used same names and symbol.Connecting line L64 ' is used for replacing the connecting line L64 of source electrode driver 30, and its line width is greater than connecting line L2～L63, but is less than or equal to connecting line L1 '.In source electrode driver 60, a statistics STA_DATA1 will indicate at most and time many luma data value is corresponding simultaneously as a result gray scale reference voltages and corresponding luma data value that data statistics unit 600 is produced are to allow connecting line L1 ' and L64 ' transmit respectively.
Be example with example (A) equally, that statistics STA_DATA1 will indicate maximum luma data value correspondences is gray scale reference voltages GV 32 and luma data value GD20～GD615, and inferior many be gray scale reference voltages GV24 and luma data value GD626～GD639.Then, data-modulated unit 610 is adjusted into " 32 " with luma data value GD 0～GD9 by " 0 ", and luma data value GD20～GD615 is adjusted into " 0 " by " 32 ", and luma data value GD626～GD639 is adjusted into " 63 " by " 24 ".On the other hand, reference voltage modulation module 620 is respectively coupled to gray scale reference voltages GV32 and GV0 with operational amplifier OP (1) and OP (33), and operational amplifier OP (64) and OP (25) be respectively coupled to gray scale reference voltages GV24 and GV63, all the other use the default setting that couples.Thus, digital to analog converter DAC (1)～DAC (10) will be by connecting line L 33, and GV0 is to equivalent capacity unit C1～C10 for the output gray scale reference voltages; Digital to analog converter DAC (21)～DAC (616) will be by connecting line L1 ', and GV 32 is to equivalent capacity unit C21～C616 for the output gray scale reference voltages; Digital to analog converter DAC (627)～DAC (640) will be by connecting line L64 ', and GV24 is to equivalent capacity unit C627～C640 for the output gray scale reference voltages.
Please refer to Fig. 7, Fig. 7 is an embodiment synoptic diagram of reference voltage modulation module 620 in the source electrode driver 60 of the present invention.Reference voltage modulation module 620 comprises multiplexer MUX ' (1)～MUX ' (64), is used for receiving gray scale reference voltages by input end, and according to selecting signal SC1 '～SC64 ', exports selected gray scale reference voltages to corresponding operational amplifier.63 input ends of multiplexer MUX ' (1) are used for receiving gray scale reference voltages GV0～GV62 respectively.Similarly, 63 input ends of multiplexer MUX ' (64) are used for receiving gray scale reference voltages GV1～GV63 respectively.3 input ends of multiplexer MUX ' (2)～(63) are used for reception itself corresponding gray scale reference voltages, GV0 and GV63 respectively.Select signal SC1 '～SC64 ' to produce according to statistics STA_DATA1.
What pay special attention to is, in embodiments of the present invention, the data-modulated unit aims at the element of digital to analog converter design, and fundamental purpose allows digital to analog converter correctly select connecting line.Therefore, if digital to analog converter can correctly select the voltage output module of connecting line to substitute by other voluntarily, then data latches need can directly not exported the luma data value by the data-modulated unit and give the voltage output module, and statistics only need be indicated the gray scale reference voltages of (or inferior many) luma data values correspondence at most.In addition, the connecting line of broad is not limited to ad-hoc location and number, and those skilled in the art can change according to this according to the configuration state and the GTG number of circuit board.
Therefore, in embodiments of the present invention, can cause the connecting line of the bigger gray scale reference voltages of operational amplifier charge capacity by broad (impedance is lower) to transmit, promoting the driving efficient of gray scale reference voltages, and then reduce the equivalent capacity required duration of charging of whole unit.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (31)
1. an one source pole driver booster tension that is used for a LCD drives the electronic installation of efficient, includes:
One reference voltage generating device is used for producing a plurality of gray scale reference voltages;
A plurality of first connecting lines, each first connecting line is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages;
One second connecting line is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines;
One data statistics unit is used for adding up a plurality of luma data values, and to produce a statistics result, maximum luma data are worth pairing gray scale reference voltages in these these a plurality of gray scale reference voltages of statistics indication; And
One reference voltage modulation module, be coupled between this reference voltage generating device and this a plurality of first connecting lines and this second connecting line, be used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by maximum luma data in these these a plurality of gray scale reference voltages of second connecting line transmission.
2. electronic installation as claimed in claim 1, wherein this reference voltage modulation module comprises a plurality of multiplexers.
3. electronic installation as claimed in claim 1, wherein the line width of this second connecting line is three times of line width of these a plurality of first connecting lines.
4. electronic installation as claimed in claim 1, it also comprises:
One data-modulated unit is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs; And
One voltage output module is used for adjusting data value according to these a plurality of GTGs, selects one first connecting line or this second connecting line of these a plurality of first connecting lines.
5. electronic installation as claimed in claim 1, it also comprises one the 3rd connecting line, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of the 3rd connecting line is greater than the line width of these a plurality of first connecting lines.
6. electronic installation as claimed in claim 5, wherein this statistics also indicates time many luma data to be worth pairing gray scale reference voltages.
7. electronic installation as claimed in claim 6, wherein this reference voltage modulation module is also according to this statistics, adjust the transmission corresponding relation of the 3rd connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by the 3rd connecting line transmission time many luma data.
8. electronic installation as claimed in claim 6, it also comprises:
One data-modulated unit is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs; And
One voltage output module is used for adjusting data value according to these a plurality of GTGs, selects one first connecting line, this second connecting line or the 3rd connecting line of these a plurality of first connecting lines.
9. electronic installation as claimed in claim 5, wherein the line width of this second connecting line equals the line width of the 3rd connecting line.
10. electronic installation as claimed in claim 5, wherein the line width of this second connecting line is greater than the line width of the 3rd connecting line.
11. a method that is used for the one source pole driver booster tension driving efficient of a LCD includes:
A plurality of first connecting lines and one second connecting line are provided, and each first connecting line and this second connecting line are used for transmitting a gray scale reference voltages of a plurality of gray scale reference voltages, and the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines;
Add up a plurality of luma data values, to produce a statistics result, maximum luma data are worth pairing gray scale reference voltages in these these a plurality of gray scale reference voltages of statistics indication; And
According to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by maximum luma data in these these a plurality of gray scale reference voltages of second connecting line transmission.
12. method as claimed in claim 11, wherein the line width of this second connecting line is three times of line width of these a plurality of first connecting lines.
13. method as claimed in claim 11, it also comprises:
According to this statistics, adjust the data content of these a plurality of luma data values, adjust data value to export a plurality of GTGs; And
Adjust data value according to these a plurality of GTGs, select one first connecting line or this second connecting line of these a plurality of first connecting lines.
14. method as claimed in claim 11, it also comprises provides one the 3rd connecting line, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of the 3rd connecting line is greater than the line width of these a plurality of first connecting lines.
15. method as claimed in claim 14, wherein this statistics also indicates time many luma data to be worth pairing gray scale reference voltages.
16. method as claimed in claim 15, it also comprises according to this statistics, adjusts the transmission corresponding relation of the 3rd connecting line and these a plurality of gray scale reference voltages, to be worth pairing gray scale reference voltages by the 3rd connecting line transmission time many luma data.
17. method as claimed in claim 14, it also comprises:
According to this statistics, adjust the data content of these a plurality of luma data values, adjust data value to export a plurality of GTGs; And
Adjust data value according to these a plurality of GTGs, select one first connecting line, this second connecting line or the 3rd connecting line of these a plurality of first connecting lines.
18. method as claimed in claim 14, wherein the line width of this second connecting line equals the line width of the 3rd connecting line.
19. method as claimed in claim 14, wherein the line width of this second connecting line is greater than the line width of the 3rd connecting line.
20. but the LCD of a booster tension driving efficient includes:
One panel comprises a plurality of equivalent capacitys unit and has the ability that shows a plurality of GTGs; And
The one source pole driver is coupled to this panel, and this source electrode driver includes:
One reference voltage generating device is used for producing a plurality of gray scale reference voltages;
A plurality of operational amplifiers are used for promoting these a plurality of gray scale reference voltages;
A plurality of first connecting lines, each first connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages;
One second connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines;
One data statistics unit, be used for adding up a plurality of luma data values corresponding to this a plurality of equivalent capacitys unit, producing a statistics result, this statistics indicates in these a plurality of gray scale reference voltages at most that luma data are worth pairing gray scale reference voltages and corresponding luma data value;
One data-modulated unit is coupled to this data statistics unit, is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs;
One reference voltage modulation module, be used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, be worth pairing gray scale reference voltages to transmit maximum luma data by this second connecting line; And
A plurality of digital to analog converters, be coupled to a sequence by these many first connecting lines and this at least one second connecting line, each digital to analog converter is used for adjusting data value according to a GTG of these a plurality of GTGs adjustment data values, select one first connecting line or this second connecting line of these a plurality of first connecting lines, to export the equivalent capacitor cell of corresponding gray scale reference voltages to this a plurality of equivalent capacitys unit;
Wherein, be worth the GTG adjustment data value of the digital to analog converter of pairing gray scale reference voltages corresponding to maximum luma data in these a plurality of digital to analog converters, select this second connecting line according to correspondence.
21. LCD as claimed in claim 20, wherein this reference voltage modulation module is coupled between this reference voltage generating device and this a plurality of operational amplifiers.
22. LCD as claimed in claim 20, wherein this reference voltage modulation module is coupled between these a plurality of operational amplifiers and this a plurality of first connecting lines and this second connecting line.
23. LCD as claimed in claim 20, wherein this reference voltage modulation module comprises a plurality of multiplexers.
24. LCD as claimed in claim 20, wherein the line width of this second connecting line is three times of line width of these a plurality of first connecting lines.
25. but the LCD of a booster tension driving efficient includes:
One panel comprises a plurality of equivalent capacitys unit and has the ability that shows a plurality of GTGs; And
The one source pole driver is coupled to this panel, and this source electrode driver includes:
One reference voltage generating device is used for producing a plurality of gray scale reference voltages;
A plurality of operational amplifiers are used for promoting these a plurality of gray scale reference voltages;
A plurality of first connecting lines, each first connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages;
One second connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of this second connecting line is greater than the line width of these a plurality of first connecting lines;
One the 3rd connecting line is coupled to an operational amplifier of these a plurality of operational amplifiers, is used for transmitting a gray scale reference voltages of these a plurality of gray scale reference voltages, and the line width of the 3rd connecting line is greater than the line width of these a plurality of first connecting lines;
One data statistics unit, be used for adding up a plurality of luma data values corresponding to this a plurality of equivalent capacitys unit, to produce a statistics result, this statistics indicates in these a plurality of gray scale reference voltages at most that luma data are worth pairing gray scale reference voltages and corresponding luma data value, and inferior many luma data are worth pairing gray scale reference voltages and corresponding luma data value;
One data-modulated unit is coupled to this data statistics unit, is used for adjusting the data content of these a plurality of luma data values according to this statistics, adjusts data value to export a plurality of GTGs;
One reference voltage modulation module, be used for according to this statistics, adjust the transmission corresponding relation of these a plurality of first connecting lines and this second connecting line and these a plurality of gray scale reference voltages, be worth pairing gray scale reference voltages to transmit maximum luma data, and be worth pairing gray scale reference voltages by the 3rd connecting line transmission time many luma data by this second connecting line; And
A plurality of digital to analog converters, be coupled to a sequence by these many first connecting lines, this second connecting line and the 3rd connecting line, each digital to analog converter is used for adjusting data value according to a GTG of these a plurality of GTGs adjustment data values, select one first connecting line, this second connecting line or the 3rd connecting line of these a plurality of first connecting lines, to export the equivalent capacitor cell of corresponding gray scale reference voltages to this a plurality of equivalent capacitys unit;
Wherein, be worth the GTG adjustment data value of the digital to analog converter of pairing gray scale reference voltages corresponding to maximum luma data in these a plurality of digital to analog converters according to correspondence, select this second connecting line, and the digital to analog converter that is worth pairing gray scale reference voltages corresponding to inferior many luma data is adjusted data value according to the GTG of correspondence, selects the 3rd connecting line.
26. LCD as claimed in claim 25, wherein this reference voltage modulation module is coupled between this reference voltage generating device and this a plurality of operational amplifiers.
27. LCD as claimed in claim 25, wherein this reference voltage modulation module is coupled between these a plurality of operational amplifiers and this a plurality of first connecting lines, this second connecting line and the 3rd connecting line.
28. LCD as claimed in claim 25, wherein this reference voltage modulation module comprises a plurality of multiplexers.
29. LCD as claimed in claim 25, wherein the line width of this second connecting line is three times of line width of these a plurality of first connecting lines.
30. LCD as claimed in claim 25, wherein the line width of this second connecting line equals the line width of the 3rd connecting line.
31. LCD as claimed in claim 25, wherein the line width of this second connecting line is greater than the line width of the 3rd connecting line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101441260A CN101640032B (en) | 2008-07-29 | 2008-07-29 | Electronic device for enhancing voltage drive efficiency and related LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101441260A CN101640032B (en) | 2008-07-29 | 2008-07-29 | Electronic device for enhancing voltage drive efficiency and related LCD |
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| CN101640032A true CN101640032A (en) | 2010-02-03 |
| CN101640032B CN101640032B (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101441260A Expired - Fee Related CN101640032B (en) | 2008-07-29 | 2008-07-29 | Electronic device for enhancing voltage drive efficiency and related LCD |
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| CN (1) | CN101640032B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938246A (en) * | 2012-12-06 | 2013-02-20 | 深圳市华星光电技术有限公司 | Driving system of liquid crystal display |
| CN103854628A (en) * | 2012-12-06 | 2014-06-11 | 联咏科技股份有限公司 | Driving circuit |
| CN110827779A (en) * | 2019-11-15 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Common voltage generation circuit, common voltage generation method, and liquid crystal display device |
| CN114495786A (en) * | 2020-10-28 | 2022-05-13 | 瑞鼎科技股份有限公司 | Gamma voltage generating circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08115060A (en) * | 1994-10-14 | 1996-05-07 | Sharp Corp | Driving circuit for display device and liquid crystal display device |
| CN100505022C (en) * | 2006-03-08 | 2009-06-24 | 联咏科技股份有限公司 | Digital information driver and display using the same |
| JP4936854B2 (en) * | 2006-10-25 | 2012-05-23 | ルネサスエレクトロニクス株式会社 | Display device and display panel driver |
-
2008
- 2008-07-29 CN CN2008101441260A patent/CN101640032B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938246A (en) * | 2012-12-06 | 2013-02-20 | 深圳市华星光电技术有限公司 | Driving system of liquid crystal display |
| CN103854628A (en) * | 2012-12-06 | 2014-06-11 | 联咏科技股份有限公司 | Driving circuit |
| WO2014086051A1 (en) * | 2012-12-06 | 2014-06-12 | 深圳市华星光电技术有限公司 | Drive system of liquid crystal display |
| CN103854628B (en) * | 2012-12-06 | 2016-05-25 | 联咏科技股份有限公司 | Drive circuit |
| CN110827779A (en) * | 2019-11-15 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Common voltage generation circuit, common voltage generation method, and liquid crystal display device |
| CN110827779B (en) * | 2019-11-15 | 2021-06-22 | 昆山龙腾光电股份有限公司 | Common voltage generation circuit, common voltage generation method, and liquid crystal display device |
| CN114495786A (en) * | 2020-10-28 | 2022-05-13 | 瑞鼎科技股份有限公司 | Gamma voltage generating circuit |
| CN114495786B (en) * | 2020-10-28 | 2024-03-15 | 瑞鼎科技股份有限公司 | Gamma voltage generating circuit |
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| CN101640032B (en) | 2011-08-31 |
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