CN110827779B - Common voltage generation circuit, common voltage generation method, and liquid crystal display device - Google Patents
Common voltage generation circuit, common voltage generation method, and liquid crystal display device Download PDFInfo
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- CN110827779B CN110827779B CN201911120678.2A CN201911120678A CN110827779B CN 110827779 B CN110827779 B CN 110827779B CN 201911120678 A CN201911120678 A CN 201911120678A CN 110827779 B CN110827779 B CN 110827779B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a public voltage generating circuit, a public voltage generating method and a liquid crystal display device, wherein the public voltage generating circuit comprises a data processing module, a digital-to-analog conversion module and a voltage output module; the data processing module counts gray-scale values corresponding to the sub-pixels with the same polarity and the same color receiving the output voltage of the source line to obtain m concentrated gray-scale values corresponding to the m sub-pixel groups, outputs m digital signals corresponding to the m sub-pixel groups according to the m concentrated gray-scale values, and outputs the m digital signals according to the m concentrated gray-scale values; the digital-to-analog conversion module outputs m public voltages according to the m digital signals; the voltage output module outputs m common voltages to corresponding source lines of the display panel according to the polarity inversion signal. The invention reduces the voltage amplitude of the source electrode output to the source electrode line by the source electrode driving circuit to the maximum extent and reduces the power consumption of the display device.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a common voltage generation circuit, a common voltage generation method and a liquid crystal display device.
Background
A Liquid Crystal Display (LCD) has the advantages of good picture quality, small size, light weight, low driving voltage, low power consumption, no radiation, and relatively low manufacturing cost, and is currently dominant in the field of flat panel displays. It is widely used in a variety of office automation and audio-visual devices such as desktop computers, palm top computers, Personal Digital Assistants (PDAs), cellular phones, tv boxes, and the like.
At present, the charging method of the pixels of the display panel is: the positive and negative switching of each frame charges the source voltage of the pixel, while the pixel receives a common voltage VCOM of which the voltage is constant. However, as the display technology is developed more and more, the requirement for power consumption is higher, and therefore, the charging method of the pixels of the display panel needs to be improved to reduce the power consumption of the display device.
Disclosure of Invention
In view of the above, the present invention aims to provide a common voltage generating circuit, a common voltage generating method and a liquid crystal display device, so as to reduce power consumption of the display device.
The embodiment of the invention provides a public voltage generating circuit, which comprises a data processing module, a digital-to-analog conversion module and a voltage output module; the data processing module counts gray-scale values corresponding to sub-pixels of the same polarity and the same color receiving the output voltage of a source line to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, wherein m is a positive even number, the m sub-pixel groups are obtained by classifying all the sub-pixels of the display panel according to the same polarity and the same color, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value with the largest occurrence frequency in the gray-scale values of all the sub-pixels of the corresponding sub-pixel group, and m digital signals corresponding to the m sub-pixel groups are output according to the m concentrated gray-scale values; the digital-to-analog conversion module is connected with the data processing module, receives the m digital signals and outputs m public voltages corresponding to the m sub-pixel groups according to the m digital signals; and the voltage output module is connected with the digital-to-analog conversion module, receives the m public voltages and outputs the m public voltages to the source line corresponding to the polarity and color sub-pixel according to the polarity inversion signal, so that the amplitude of the voltage output to the source line by the source driver is reduced.
Further, the data processing module comprises a comparator and a counter; the comparator compares the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups; and the counter is connected with the comparator and counts the occurrence times of the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups.
Further, all the color sub-pixels of the display panel include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the data processing module classifies all the color sub-pixels of the display panel according to the same polarity and the same color sub-pixels to obtain six sub-pixel groups.
Further, the voltage output module is divided into m/2 sub-output modules according to the corresponding common voltages of the sub-pixels with different colors, and each sub-output module outputs the corresponding common voltage to the source line corresponding to the sub-pixel with the polarity and the color according to the polarity inversion signal.
Further, each sub-output module comprises a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element and a sixth switch element, wherein a first control terminal of the first switch element receives the polarity inversion signal, a first pass terminal of the first switch element receives a first common voltage of two common voltages corresponding to the corresponding color sub-pixel, and a second pass terminal of the first switch element is connected with a first output terminal through a first resistor; the second control end of the second switch element receives a power supply voltage through a second resistor, the third path end of the second switch element receives the second common voltage of the two common voltages corresponding to the corresponding color sub-pixel, and the fourth path end of the second switch element is connected with the first output end through a third resistor; the third control end of the third switching element receives the polarity inversion signal, the fifth path end of the third switching element is connected with the ground end, and the sixth path end of the third switching element is connected with the second control end of the second switching element; a fourth control end of the fourth switching element receives the polarity inversion signal, a seventh path end of the fourth switching element is connected with a second output end through a fourth resistor, and an eighth path end of the fourth switching element receives the first common voltage; a fifth control terminal of the fifth switching element receives the power supply voltage through a sixth resistor, a ninth path terminal of the fifth switching element is connected with the second output terminal through a fifth resistor, and a tenth path terminal of the fifth switching element receives the second common voltage; a sixth control end of the sixth switching element receives the polarity-reversal signal, an eleventh path end of the sixth switching element is connected to a ground end, and a tenth path end of the sixth switching element is connected to a fifth control end of the fifth switching element.
The embodiment of the invention also provides a public voltage generation method, which comprises the following steps: counting gray-scale values corresponding to sub-pixels with the same polarity and the same color receiving source line output voltage to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, wherein m is a positive even number, the m sub-pixel groups are obtained by classifying all color sub-pixels of a display panel according to the sub-pixels with the same polarity and the same color, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value with the largest occurrence frequency in the gray-scale values of all color sub-pixels in the corresponding sub-pixel group, and outputting m digital signals corresponding to the m sub-pixel groups according to the m concentrated gray-scale values; receiving the m digital signals and outputting m public voltages corresponding to the m sub-pixel groups according to the m digital signals; and receiving the m public voltages and outputting the m public voltages to a source line corresponding to the polarity and color sub-pixels according to the polarity inversion signal, so that the amplitude of the voltage output to the source line by the source driver is reduced.
Further, the common voltage generating method includes the steps of: and comparing the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups, and counting the occurrence times of the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups.
Further, all the color sub-pixels of the display panel include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and all the color sub-pixels of the display panel are classified according to the same polarity and the same color sub-pixels to obtain six sub-pixel groups.
Further, the common voltage generating method includes the steps of: grouping m public voltages corresponding to the m sub-pixel groups according to the sub-pixels with different colors; and outputting the corresponding common voltage to the source lines of the display panel corresponding to the polarity and color sub-pixels according to the polarity inversion signal.
The embodiment of the invention also provides a liquid crystal display device which comprises the public voltage generating circuit.
According to the common voltage generation circuit, the common voltage generation method and the liquid crystal display device, the gray-scale values corresponding to the sub-pixels with the same polarity and the same color receiving the output voltage of the source line are counted to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, so that the region of the concentrated voltage value appearing in each sub-pixel group in the corresponding common voltage is obtained, the m common voltages corresponding to the m sub-pixel groups are output through digital-to-analog conversion, and the m common voltages are output to the corresponding source line according to the polarity and the color sub-pixels, so that the voltage amplitude output to the source line by the source driving circuit is reduced to the maximum extent, and the power consumption of the display device is reduced.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a circuit connection diagram of a common voltage generating circuit according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating the connection between six sub-pixel groups and the source line in the Nth frame according to the first embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating the connection between six sub-pixel groups and the source line in the (N + 1) th frame according to the first embodiment of the present invention.
Fig. 4 is a connection diagram of the voltage output module according to the first embodiment of the present invention.
Fig. 5 is a connection diagram of the sub-output module of the voltage output module according to the first embodiment of the invention.
FIG. 6 is a graph showing the voltage variation of the source voltage outputted to the source line by the source driving circuit of the prior art.
FIG. 7 is a voltage variation diagram of the source voltage outputted to the source line by the source driving circuit according to the first embodiment of the present invention.
Fig. 8 is a flowchart illustrating a common voltage generating method according to a second embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description will be given of specific embodiments, methods, steps, structures, features and effects of the common voltage generating circuit, the common voltage generating method and the liquid crystal display device according to the present invention with reference to the accompanying drawings and preferred embodiments.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the invention has been described in connection with specific embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
First embodiment
The embodiment of the invention provides a common voltage generating circuit. Fig. 1 is a circuit connection diagram of a common voltage generating circuit according to a first embodiment of the present invention. As shown in fig. 1, the common voltage generating circuit includes a data processing module 100, a digital-to-analog converting module 200, and a voltage output module 300; the data processing module 100 is configured to count gray-scale values corresponding to subpixels of the same polarity and the same color receiving the source line output voltage to obtain m concentrated gray-scale values corresponding to m subpixel groups, where m is a positive even number, the m subpixel groups are obtained by classifying subpixels of all colors of the display panel 400 according to the same polarity and the same color, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value that appears most frequently in the gray-scale values of the subpixels of all colors in the corresponding subpixel group, and output m digital signals corresponding to the m subpixel groups according to the m concentrated gray-scale values; the digital-to-analog conversion module 200 is connected with the data processing module 100, receives the m digital signals and outputs m public voltages corresponding to the m sub-pixel groups according to the m digital signals; the voltage output module 300 is connected to the digital-to-analog conversion module 200, and receives the m common voltages and outputs the m common voltages to the source lines corresponding to the polarity and color sub-pixels according to the polarity inversion signal POL, so that the magnitude of the voltage output to the source lines by the source driver (not shown in fig. 1) is reduced. In an embodiment, the data processing module may be a cpu (central processing unit) or other modules with data processing functions. In an embodiment, the digital-to-analog conversion module 200 may be further connected to the power supply module 500, the power supply module 500 may output voltages of a plurality of different regions, for example, voltages of V1-V14, and the digital-to-analog conversion module 200 may output the corresponding voltage output by the power supply module 500 as a corresponding common voltage according to a plurality of digital signals output by the data processing module 100, and output a plurality of common voltages to the voltage output module 300.
In one embodiment, the data processing module 100 includes a comparator 110 and a counter 120; the comparator 110 may compare the gray-scale values of all the color sub-pixels in each of the m sub-pixel groups according to the gray-scale data; the counter 120 is connected to the comparator 110, and counts the number of occurrences of the gray-scale values of all the color sub-pixels in each of the m sub-pixel groups.
In one embodiment, all the color sub-pixels of the display panel 400 include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the data processing module 100 classifies all the color sub-pixels of the display panel 400 into six (i.e., m is 2x3 is 6) sub-pixel groups according to the same polarity and the same color sub-pixel. However, the present invention is not limited thereto, for example, if all the color sub-pixels of the display panel 400 include a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel, the data processing module 100 classifies all the color sub-pixels of the display panel 400 into eight (i.e., m is 2 × 4 is 8) sub-pixel groups according to the same polarity and the same color sub-pixel; for example, if all color sub-pixels of the display panel 400 are only one color sub-pixel, that is, a pure color picture is displayed, the data processing module 100 classifies all color sub-pixels of the display panel 400 according to the same polarity and the same color sub-pixel, so as to obtain two (i.e., m is 2 × 1 is 2) sub-pixel groups; those skilled in the art can classify all the color sub-pixels of the display panel 400 into m (i.e., m is 2x) sub-pixel groups according to the same polarity and the same color sub-pixel according to the number x of the types of the color sub-pixels of the display panel 400.
For better understanding of the present invention, the following description will be made with reference to fig. 1 to 7, taking as an example that all color sub-pixels of the display panel 400 include a red sub-pixel, a green sub-pixel, and a blue sub-pixel:
specifically, referring to fig. 2 and 3, fig. 2 is a schematic diagram illustrating a connection manner of six sub-pixel groups and a source line in an nth frame according to a first embodiment of the present invention, and fig. 3 is a schematic diagram illustrating a connection manner of six sub-pixel groups and a source line in an N +1 th frame according to a first embodiment of the present invention. In the present embodiment, all the color sub-pixels of the display panel 400 include three color sub-pixels, i.e., a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the polarity of each color sub-pixel has positive polarity and negative polarity, and then m is 2 × 3 ═ 6, so that all the color sub-pixels of the display panel 400 in fig. 1 may include six sub-pixel groups, i.e., a first sub-pixel group to a sixth sub-pixel group, and in the nth frame, the first sub-pixel group may be the red sub-pixel R + of positive polarity, the second sub-pixel group may be the red sub-pixel R + of negative polarity, the third sub-pixel group may be the blue sub-pixel B + of positive polarity, the fourth sub-pixel group may be the blue sub-pixel B of negative polarity, the fifth sub-pixel group may be the green sub-pixel G + of positive polarity, and the sixth sub-pixel group may be the green sub-pixel G-, and as can be seen from fig. 2 and 3, the color sub-pixels of the first sub-pixel group to the sixth sub-pixel group are still the original color sub-pixels from the nth frame to the N +1 th frame, but the polarity of the color sub-pixels is reversed, for example, the first sub-pixel group is the positive red sub-pixel R + at the nth frame and is the negative red sub-pixel R-at the N +1 th frame.
In this embodiment, in order to make the display panel 400 display an image, it is necessary to charge each color sub-pixel of the six sub-pixel groups with a gray scale voltage corresponding to the image. First, as shown in fig. 1, the data processing module 100 obtains 6(m is 6) concentrated gray-scale values corresponding to 6(m is 6) sub-pixel groups by counting gray-scale values corresponding to sub-pixels of the same polarity and the same color receiving the source line output voltage, where the 6 sub-pixel groups are obtained by classifying all the sub-pixels of the color of the display panel 400 according to the sub-pixels of the same polarity and the same color (please refer to the upper stage), each concentrated gray-scale value of the 6 concentrated gray-scale values is a gray-scale value with the largest number of occurrences among the gray-scale values of all the sub-pixels of the corresponding sub-pixel group, the 6 concentrated voltage values corresponding to the 6 concentrated gray-scale values of the 6 sub-pixel groups can be obtained in a corresponding region from V1 to V14, and then outputs 6 digital signals corresponding to the 6 sub-pixel groups according to the 6 concentrated gray-scale values. In an embodiment, the data processing module 100 may compare the gray-scale values of all the sub-pixels in each of the 6 sub-pixel groups by the comparator 110, and count the number of occurrences of the gray-scale values of all the sub-pixels in each of the 6 sub-pixel groups by the counter 120. As shown in fig. 1, in this embodiment, if the number of occurrences of 255 is the largest among the gray scale values (0-255) of all the red subpixels of the first subpixel group, the concentrated gray scale value of the first subpixel group is 255, and a digital signal corresponding to the first subpixel group, for example, 0X01, is output, and the concentrated gray scale values of the second to sixth subpixel groups can be obtained accordingly, and then corresponding digital signals, that is, a digital signal corresponding to the second subpixel group, for example, 0X0E, a digital signal corresponding to the third subpixel group, for example, 0X03, a digital signal corresponding to the fourth subpixel group, for example, 0X0C, a digital signal corresponding to the fifth subpixel group, for example, 0X05, and a digital signal corresponding to the sixth subpixel group, for example, 0X0A are output. It can be understood by those skilled in the art that the m concentrated gray-scale values obtained by the data processing module 100 may be different from each other, or two or more of the m concentrated gray-scale values may be the same.
Next, the digital-to-analog conversion module 200 is connected to the data processing module 100, and performs digital-to-analog conversion according to the 6 digital signals and outputs 6 common voltages corresponding to the 6 sub-pixel groups, for example, in an embodiment, the six digital signals of 0X01, 0X0E, 0X03, 0X0C, 0X05 and 0X0A in fig. 1 may be digital-to-analog converted according to the following conversion mapping table to output 6 common voltages of V1, V14, V3, V12, V5 and V10, respectively.
Then, the voltage output module 300 receives the 6 common voltages corresponding to the 6 sub-pixel groups output from the digital-to-analog conversion module 200, and outputs the 6 common voltages corresponding to the 6 sub-pixel groups to the source lines corresponding to the polarity and color sub-pixels per frame according to the polarity inversion signal POL. In one embodiment, the voltage output module 300 may be divided into 3 sub-output modules 310 according to the common voltages corresponding to the sub-pixels of different colors, for example, in fig. 4, a first sub-output module 310 receives two common voltages corresponding to the red sub-pixel R, a second sub-output module 310 receives two common voltages corresponding to the green sub-pixel G, and a third sub-output module 310 receives two common voltages corresponding to the blue sub-pixel B. Each sub-output module 310 outputs a common voltage to source lines corresponding to the polarity and color sub-pixels, respectively, according to the polarity inversion signal POL.
In one embodiment, the sub-output module 310 includes a first switch element T1, a second switch element T2, a third switch element T3, a fourth switch element T4, a fifth switch element T5 and a sixth switch element T6, a first control terminal of the first switch element T1 receives the polarity inversion signal POL, a first path terminal of the first switch element T1 receives a first common voltage Vin1 of the two common voltages corresponding to the respective color sub-pixels output by the digital-to-analog conversion module 200, and a second path terminal of the first switch element T1 is connected to the first output terminal Vout1 through a first resistor R1; a second control terminal of the second switching element T2 receives the power supply voltage Vcc through a second resistor R2, a third path terminal of the second switching element T2 receives a second common voltage Vin2 of the two common voltages corresponding to the respective color sub-pixels output by the digital-to-analog conversion module 200, and a fourth path terminal of the second switching element T2 is connected to the first output terminal Vout1 through a third resistor R3; a third control terminal of the third switching element T3 receives the polarity inversion signal POL, a fifth path terminal of the third switching element T3 is connected to the ground terminal, and a sixth path terminal of the third switching element T3 is connected to the second control terminal of the second switching element T2; a fourth control terminal of the fourth switching element T4 receives the polarity-reversal signal POL, a seventh path terminal of the fourth switching element T4 is connected to the second output terminal Vout2 through a fourth resistor R4, and an eighth path terminal of the fourth switching element T4 receives the first common voltage Vin 1; a fifth control terminal of the fifth switching element T5 receives the power supply voltage Vcc through a sixth resistor R6, a ninth path terminal of the fifth switching element T5 is connected to the second output terminal Vout2 through a fifth resistor R5, and a tenth path terminal of the fifth switching element T5 receives the second common voltage Vin 2; the sixth control terminal of the sixth switching element T6 receives the polarity-reversal signal POL, the eleventh path terminal of the sixth switching element T6 is connected to the ground terminal, and the tenth path terminal of the sixth switching element T6 is connected to the fifth control terminal of the fifth switching element T5. In an embodiment, the seventh path terminal of the fourth switching element T4 may be connected to the ground terminal through a first capacitor C1, and the first capacitor C1 may function as a filter and voltage regulator. In one embodiment, the first output terminal Vout1 may be connected to ground through a second capacitor C2, and the second capacitor C2 may function as a filter regulator.
Specifically, the polarity inversion signal POL received by the sub-output module 310 of this embodiment may be inverted once per frame, and the turn-on of the corresponding switch element may be controlled according to the high-low level of the polarity inversion signal POL, for example, the first switch element T1, the second switch element T2 are all PMOS transistors (for example, model BST100), the third switch element T3, the fourth switch element T4, the fifth switch element T5, and the sixth switch element T6 are all NOMS transistors (for example, model 2N7000G) in this embodiment, but the invention is not limited to the types of the corresponding switch elements. When the polarity inversion signal POL is at a low level, the first control terminal of the first switching element T1 and the third control terminal of the third switching element T3 both receive the polarity inversion signal POL at a low level, so that the first switching element T1 is turned on, the third switching element T3 is turned off, and the third switching element T3 is turned off, so that the second switching element T2 is turned off when the second control terminal of the second switching element T2 receives the power supply voltage Vcc at a high level through the second resistor R2, so that the first output terminal Vout1 can obtain the first common voltage Vin1 of the two common voltages corresponding to the corresponding color sub-pixel through the first resistor R1 and the turned-on first switching element T1 and output to the corresponding source line in a state where the first switching element T1 is turned on and the second switching element T2 is turned off, while, when the polarity inversion signal POL is at a low level, the fourth control terminal of the fourth switching element T4 and the sixth switching element T6 both receive the polarity inversion signal POL at a low level, the fourth switching element T4 is turned off, the sixth switching element T6 is turned off, and the sixth switching element T6 is turned off so that the fifth switching element T5 is turned on when the fifth control terminal of the fifth switching element T5 receives the power supply voltage Vcc at a high level through the sixth resistor R6, so that the second output terminal Vout2 can obtain the second common voltage Vin2 of the two common voltages corresponding to the corresponding color sub-pixel through the fifth resistor R5 and the turned-on fifth switching element T5 and output the second common voltage Vin2 to the corresponding source line in the case where the fourth switching element T4 is turned off and the fifth switching element T5 is turned on. And when the polarity reverse signal POL is at a high level, the first control terminal of the first switching element T1 and the third control terminal of the third switching element T3 both receive the polarity reverse signal POL at a high level, such that the first switching element T1 is turned off, the third switching element T3 is turned on, and the third switching element T3 is turned on, such that the second control terminal of the second switching element T2 is grounded at a low level through the turned-on third switching element T3 and the second switching element T2 is turned on, such that the first output terminal Vout1 can obtain the second common voltage Vin2 through the third resistor R3 and the turned-on second switching element T2 and output it to the corresponding source line, in case that the first switching element T1 is turned off and the second switching element T2 is turned on, and at the same time, when the polarity reverse signal POL is at a high level, the fourth control terminal of the fourth switching element T4 and the sixth control terminal of the sixth switching element T6 both receive the polarity reverse signal POL at a high level, the fourth switching element T4 is turned on, the sixth switching element T6 is turned on, and the sixth switching element T6 is turned on, so that the fifth control terminal of the fifth switching element T5 is grounded to a low level through the turned-on sixth switching element T6, and then the fifth switching element T5 is turned off, so that the second output terminal Vout2 can obtain the first common voltage Vin1 through the fourth resistor R4 and the turned-on fourth switching element T4 and output the first common voltage to the corresponding source line in the case that the fourth switching element T4 is turned on and the fifth switching element T5 is turned off.
Thus, according to the polarity inversion signal POL, the first output terminal Vout1 and the second output terminal Vout2 may respectively output two common voltages corresponding to the same color sub-pixel, so that the source lines of the two sub-pixel groups corresponding to the same color sub-pixel respectively receive the corresponding common voltages, for example, the first sub-pixel group and the second sub-pixel group may be two sub-pixel groups corresponding to a red sub-pixel, and in the nth frame, if the polarity inversion signal POL is at a low level, the first output terminal Vout1 may output the first common voltage Vin1 (refer to V1 in fig. 2) to the source line of the first sub-pixel group, and the second output terminal Vout2 may output the second common voltage Vin2 (refer to V14 in fig. 2) to the source line of the second sub-pixel group; if the polarity inversion signal POL is high, the first output terminal Vout1 may output the second common voltage Vin2 (see V14 in fig. 3) to the source line of the first sub-pixel group, and the second output terminal Vout2 may output the first common voltage Vin1 (see V1 in fig. 3) to the source line of the second sub-pixel group.
Finally, because the respective source lines of the plurality of sub-pixel groups receive the respective common voltages outputted from the voltage output module 300, therefore, when displaying an image, the gray scale voltage received by the plurality of sub-pixel groups when displaying an image is the superposition of the common voltage output to the source line by the voltage output module 300 and the source voltage output to the source line by the source driving circuit, since the data processing module 100 counts the concentrated gray scale value of each sub-pixel group, the respective concentrated voltage values of each sub-pixel group in the corresponding region from V1 to V14 can be obtained, so that the common voltages outputted to the source lines by the voltage output module 300 are all concentrated in the region of each sub-pixel group where the concentrated gray scale values correspond to the common voltages, the source driving circuit can provide a source voltage with a smaller amplitude so that each sub-pixel group receives a required gray scale voltage to display an image. Therefore, the voltage amplitude output to the source line by the source driving circuit can be reduced to the greatest extent, and the power consumption of the display device is reduced. The following takes the first sub-pixel group receiving the source voltage as an example, and is described with reference to fig. 6 and 7. FIG. 6 is a graph showing the voltage variation of the source voltage outputted to the source line by the source driving circuit of the prior art. As shown in fig. 6, in the nth frame of the image display, the voltages output to the source lines by the source driving circuit are V1, V1, V5, and V1, respectively, and in the (N + 1) th frame of the image display, the voltages output to the source lines by the source driving circuit are V14, V14, V10, and V14, respectively, the amplitudes of the source voltages output by the source driving circuit are V1, V1, V5, and V1, respectively, and the power consumption of the corresponding pure white frame, i.e., the gray scale value 255, is P1/2 (e.g., date Nx Ny): UL power consumption255 2F. FIG. 7 is a voltage variation diagram of the source voltage outputted to the source line by the source driving circuit according to the first embodiment of the present invention. As shown in FIG. 7, in the figureThe voltages output to the source lines by the source driving circuit are respectively V1, V1, V5 and V1 in the N +1 frame of the image display, the voltages output to the source lines by the source driving circuit are respectively V14, V14, V10 and V14 in the N +1 frame of the image display, the common voltage of the corresponding sub-pixel group of the source lines can be provided by the common voltage generating circuit in the embodiment, the common voltage provided by the common voltage generating circuit can be concentrated in the corresponding areas of V1 and V14 by the data processing module 100 according to the concentrated gray scale value of the sub-pixel group, so that the source voltages output to the source lines by the source driving circuit are respectively V1-V1, V1-V1, V5-V1 and V1-V1, namely 0, V5-V1 and 0 in the N frame of the image display, and the source voltages output to the source lines by the source driving circuit are respectively V24-V14 in the N frame of the image display, V14-V14, V10-V14, V14-V14, i.e. 0, V10-V14, 0, i.e. the amplitudes of the source voltages output by the source driving circuit are 0, V5-V1, 0, respectively, and the corresponding picture power consumption of the pure white picture L255 is almost equal to the power consumption of the black picture L0, i.e. P1/2 (Cdate Nx Ny) UL 1/20 2F. Therefore, the source driving circuit can provide the source voltage with smaller voltage amplitude, so that the first sub-pixel group receives the required gray scale voltage to display the image, and the power consumption of the display device is correspondingly reduced.
The common voltage generation circuit provided by the embodiment of the invention obtains m concentrated gray scale values corresponding to m sub-pixel groups by counting the gray scale values corresponding to the sub-pixels with the same polarity and the same color receiving the output voltage of the source line, thereby obtaining the region of the concentrated voltage value appearing in each sub-pixel group in the corresponding common voltage, and outputs a plurality of common voltages corresponding to a plurality of sub-pixel groups to the source line corresponding to the polarity and the color sub-pixel through digital-to-analog conversion, thereby reducing the voltage amplitude value output to the source line by the source driving circuit to the maximum extent and reducing the power consumption of the display device.
Second embodiment
The embodiment of the invention also provides a common voltage generation method based on the same inventive concept, and fig. 8 is a schematic flow chart of the common voltage generation method according to the second embodiment of the invention. As shown in fig. 8, the common voltage generating method includes the steps of:
s1, carrying out statistics on gray-scale values corresponding to the same-polarity and same-color sub-pixels receiving the output voltage of the source line to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, wherein m is a positive even number, the m sub-pixel groups are obtained by classifying all color sub-pixels of the display panel 400 according to the same-polarity and same-color sub-pixels, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value with the largest occurrence frequency in the gray-scale values of all color sub-pixels in the corresponding sub-pixel group, and m digital signals corresponding to the m sub-pixel groups are output according to the m concentrated gray-scale values;
s2, receiving the m digital signals and outputting m public voltages corresponding to the m sub-pixel groups according to the m digital signals;
and S3, receiving the m common voltages and outputting the m common voltages to the source lines corresponding to the polarity and color sub-pixels according to the polarity inversion signal POL, so that the amplitude of the voltage output to the source lines by the source driver is reduced.
In one embodiment, a common voltage generating method includes the steps of: comparing the gray-scale values of all color sub-pixels in each sub-pixel group of the m sub-pixel groups; and counting the occurrence times of the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups.
In one embodiment, all the color sub-pixels of the display panel 400 include a red sub-pixel, a green sub-pixel and a blue sub-pixel, and all the color sub-pixels of the display panel 400 are classified into six sub-pixel groups according to the same polarity and the same color sub-pixel. However, the present invention is not limited thereto, for example, if all the color sub-pixels of the display panel 400 include a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel, all the color sub-pixels of the display panel 400 are classified according to the same polarity and the same color sub-pixel to obtain eight (i.e., m is 2x4 is 8) sub-pixel groups; for example, if all color sub-pixels of the display panel 400 are only one color sub-pixel, that is, a pure color picture is displayed, all color sub-pixels of the display panel 400 are classified according to the same polarity and the same color sub-pixel, so as to obtain two (i.e., m is 2 × 1 is 2) sub-pixel groups; those skilled in the art can classify all the color sub-pixels of the display panel 400 into m (i.e., m is 2x) sub-pixel groups according to the same polarity and the same color sub-pixel according to the number x of the types of the color sub-pixels of the display panel 400.
In one embodiment, a common voltage generating method includes the steps of: grouping m public voltages corresponding to the m sub-pixel groups according to the received public voltages corresponding to the sub-pixels with different colors; the corresponding common voltage is output to the source line corresponding to the polarity and color sub-pixel according to the polarity inversion signal POL.
For a specific implementation of the common voltage generation method of this embodiment, reference may be made to the implementation of the common voltage generation circuit described above, and details are not described here again.
According to the common voltage generation method provided by the embodiment of the invention, m concentrated gray scale values corresponding to m sub-pixel groups are obtained by counting the gray scale values corresponding to the sub-pixels with the same polarity and the same color receiving the output voltage of the source line, so that the region of the concentrated voltage value appearing in each sub-pixel group in the corresponding common voltage is obtained, m common voltages corresponding to the m sub-pixel groups are output through digital-to-analog conversion, and the m common voltages are output to the corresponding source line according to the polarity and the color sub-pixels, so that the voltage amplitude output to the source line by the source driving circuit is reduced to the maximum extent, and the power consumption of the display device is reduced.
Third embodiment
The embodiment of the invention also provides a liquid crystal display device which comprises the public voltage generating circuit.
For a specific implementation of the liquid crystal display device of this embodiment, reference may be made to the implementation of the above-mentioned embodiment of the common voltage generation circuit, and details are not described here again.
According to the liquid crystal display device provided by the embodiment of the invention, m concentrated gray scale values corresponding to m sub-pixel groups are obtained by counting gray scale values corresponding to sub-pixels with the same polarity and the same color receiving the output voltage of the source line, so that the region of the concentrated voltage value appearing in each sub-pixel group in the corresponding public voltage is obtained, m public voltages corresponding to the m sub-pixel groups are output through digital-to-analog conversion, and the m public voltages are output to the corresponding source line according to the polarity and the color sub-pixels, so that the voltage amplitude output to the source line by the source driving circuit is reduced to the maximum extent, and the power consumption of the display device is reduced.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A common voltage generation circuit, characterized in that the common voltage generation circuit comprises:
the data processing module (100) is used for counting gray-scale values corresponding to sub-pixels of the same polarity and the same color receiving the output voltage of a source line to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, wherein m is a positive even number, the m sub-pixel groups are obtained by classifying sub-pixels of all colors of a display panel (400) according to the sub-pixels of the same polarity and the same color, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value with the largest occurrence frequency in the gray-scale values of the sub-pixels of all colors in the corresponding sub-pixel group, and m digital signals corresponding to the m sub-pixel groups are output according to the m concentrated gray-scale values;
the digital-to-analog conversion module (200), the digital-to-analog conversion module (200) is connected with the data processing module (100), receives the m digital signals and outputs m public voltages corresponding to the m sub-pixel groups according to the m digital signals;
and the voltage output module (300) is connected with the digital-to-analog conversion module (200), receives the m public voltages and outputs the m public voltages to a source line corresponding to the polarity and color sub-pixel according to a polarity inversion signal (POL), so that the amplitude of the voltage output to the source line by the source driver is reduced.
2. The common voltage generating circuit according to claim 1, wherein the data processing module (100) comprises a comparator (110) and a counter (120); the comparator (110) compares the gray-scale values of all color sub-pixels in each of the m sub-pixel groups; the counter (120) is connected with the comparator (110) and counts the occurrence times of the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups.
3. The common voltage generating circuit according to claim 1, wherein all color sub-pixels of the display panel (400) comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the data processing module (100) classifies all color sub-pixels of the display panel (400) into six sub-pixel groups according to the same polarity and the same color sub-pixel.
4. The common voltage generating circuit as claimed in claim 1, wherein the voltage output module (300) is divided into m/2 sub-output modules (310) according to receiving the respective common voltages of the sub-pixels of different colors, and each sub-output module (310) outputs the respective common voltage to the source line corresponding to the sub-pixel of the polarity and color according to the polarity inversion signal (POL).
5. The common voltage generating circuit as claimed in claim 4, wherein each of the sub-output modules (310) includes a first switching element (T1), a second switching element (T2), a third switching element (T3), a fourth switching element (T4), a fifth switching element (T5) and a sixth switching element (T6), a first control terminal of the first switching element (T1) receives the polarity inversion signal (POL), a first pass terminal of the first switching element (T1) receives a first common voltage (Vin1) of two common voltages corresponding to the corresponding color sub-pixel, and a second pass terminal of the first switching element (T1) is connected to the first output terminal (Vout1) through a first resistor (R1); a second control terminal of the second switching element (T2) receives a power supply voltage (Vcc) through a second resistor (R2), a third path terminal of the second switching element (T2) receives a second common voltage (Vin2) of the two common voltages corresponding to the corresponding color sub-pixel, and a fourth path terminal of the second switching element (T2) is connected to the first output terminal (Vout1) through a third resistor (R3); a third control terminal of the third switching element (T3) receives the polarity inversion signal (POL), a fifth path terminal of the third switching element (T3) is connected to a ground terminal, and a sixth path terminal of the third switching element (T3) is connected to the second control terminal of the second switching element (T2); a fourth control terminal of the fourth switching element (T4) receives the polarity-reversal signal (POL), a seventh path terminal of the fourth switching element (T4) is connected to the second output terminal (Vout2) through a fourth resistor (R4), and an eighth path terminal of the fourth switching element (T4) receives the first common voltage (Vin 1); a fifth control terminal of the fifth switching element (T5) receives the power supply voltage (Vcc) through a sixth resistor (R6), a ninth path terminal of the fifth switching element (T5) is connected to the second output terminal (Vout2) through a fifth resistor (R5), and a tenth path terminal of the fifth switching element (T5) receives the second common voltage (Vin 2); a sixth control terminal of the sixth switching element (T6) receives the polarity-reversal signal (POL), an eleventh path terminal of the sixth switching element (T6) is connected to the ground terminal, and a tenth path terminal of the sixth switching element (T6) is connected to the fifth control terminal of the fifth switching element (T5); wherein the first switching element (T1) and the second switching element (T2) are both PMOS transistors, and the third switching element (T3), the fourth switching element (T4), the fifth switching element (T5) and the sixth switching element (T6) are all NMOS transistors.
6. A common voltage generation method, characterized by comprising the steps of:
counting gray-scale values corresponding to sub-pixels with the same polarity and the same color receiving source line output voltage to obtain m concentrated gray-scale values corresponding to m sub-pixel groups, wherein m is a positive even number, the m sub-pixel groups are obtained by classifying all color sub-pixels of a display panel (400) according to the sub-pixels with the same polarity and the same color, each concentrated gray-scale value of the m concentrated gray-scale values is a gray-scale value with the largest occurrence frequency in the gray-scale values of all color sub-pixels in the corresponding sub-pixel group, and m digital signals corresponding to the m sub-pixel groups are output according to the m concentrated gray-scale values;
receiving the m digital signals and outputting m public voltages corresponding to the m sub-pixel groups according to the m digital signals;
receiving the m common voltages and outputting the m common voltages to source lines corresponding to the polarity and color sub-pixels according to a polarity inversion signal (POL) such that the magnitude of a voltage output to the source lines by a source driver is reduced.
7. The common voltage generating method according to claim 6, comprising the steps of: and comparing the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups, and counting the occurrence times of the gray-scale values of all the color sub-pixels in each sub-pixel group of the m sub-pixel groups.
8. The method of claim 6, wherein all the color sub-pixels of the display panel (400) comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel, and wherein the sub-pixels of all the colors of the display panel (400) are classified into six sub-pixel groups according to the same polarity and the same color sub-pixel.
9. The common voltage generating method according to claim 6, comprising the steps of: grouping m public voltages corresponding to the m sub-pixel groups according to the received public voltages corresponding to the sub-pixels with different colors; outputting a corresponding common voltage to source lines corresponding to the polarity and color sub-pixels according to the polarity inversion signal (POL).
10. A liquid crystal display device, characterized in that the liquid crystal display device comprises the common voltage generating circuit according to any one of claims 1 to 5.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006071938A (en) * | 2004-09-01 | 2006-03-16 | Seiko Epson Corp | Automatic image correcting circuit |
| CN101640032A (en) * | 2008-07-29 | 2010-02-03 | 联咏科技股份有限公司 | Electronic device for enhancing voltage drive efficiency and related LCD |
| CN102696068A (en) * | 2010-01-08 | 2012-09-26 | 夏普株式会社 | Display device, and method for driving display device |
| CN104505047A (en) * | 2014-12-31 | 2015-04-08 | 深圳市华星光电技术有限公司 | Display driving method, circuit and liquid crystal display |
| JP2016099468A (en) * | 2014-11-20 | 2016-05-30 | 株式会社Ｊｏｌｅｄ | Display device and display method |
| CN106601165A (en) * | 2016-12-15 | 2017-04-26 | 北京小米移动软件有限公司 | Screen display method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI506609B (en) * | 2013-02-08 | 2015-11-01 | Hung Ta Liu | Method for adjusting gamma curve and gamma voltage generator and display control system therof |
| KR102348701B1 (en) * | 2015-05-31 | 2022-01-06 | 엘지디스플레이 주식회사 | Liquid crystal display apparatus |
-
2019
- 2019-11-15 CN CN201911120678.2A patent/CN110827779B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006071938A (en) * | 2004-09-01 | 2006-03-16 | Seiko Epson Corp | Automatic image correcting circuit |
| CN101640032A (en) * | 2008-07-29 | 2010-02-03 | 联咏科技股份有限公司 | Electronic device for enhancing voltage drive efficiency and related LCD |
| CN102696068A (en) * | 2010-01-08 | 2012-09-26 | 夏普株式会社 | Display device, and method for driving display device |
| JP2016099468A (en) * | 2014-11-20 | 2016-05-30 | 株式会社Ｊｏｌｅｄ | Display device and display method |
| CN104505047A (en) * | 2014-12-31 | 2015-04-08 | 深圳市华星光电技术有限公司 | Display driving method, circuit and liquid crystal display |
| CN106601165A (en) * | 2016-12-15 | 2017-04-26 | 北京小米移动软件有限公司 | Screen display method and device |
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