CN114399979B - Circuit structure and display driving chip - Google Patents
Circuit structure and display driving chip Download PDFInfo
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- CN114399979B CN114399979B CN202111563718.8A CN202111563718A CN114399979B CN 114399979 B CN114399979 B CN 114399979B CN 202111563718 A CN202111563718 A CN 202111563718A CN 114399979 B CN114399979 B CN 114399979B
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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
- G09G3/3614—Control of polarity reversal in general
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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 discloses a circuit structure and a display driving chip, relates to the technical field of display driving chips, and mainly aims to reduce the power consumption of the display driving chip while improving the charging efficiency of a pixel unit; the circuit structure includes: the first charge sharing circuit is used for recovering the pixel voltage of the first pixel control line when the data signal input of the current display frame is finished and storing the pixel voltage as the first pixel voltage; supplying the first pixel voltage to the second pixel control line when the data signal of the next display frame is input; the first pixel voltage and the second pixel voltage have opposite polarities; a second charge sharing circuit for recovering and storing a pixel voltage of the second pixel control line as a second pixel voltage when the data signal input of the current display frame is ended; the second pixel voltage is supplied to the first pixel control line when the data signal of the next display frame is input.
Description
Technical Field
The invention relates to the technical field of display chips, in particular to a circuit structure and a display driving chip.
Background
The display technology is a leading-edge technology for providing flexible visual information for human beings by using electronic technology, and the display panel is used as a real carrier of the display technology. In order to avoid the deterioration of the liquid crystal molecular quality caused by continuously supplying a fixed voltage to the pixel unit for a long time, it is necessary to supply a pixel voltage with alternating polarity to the pixel unit to drive the liquid crystal.
Currently, the pixel voltage of the pixel unit is provided by a pixel control line in the display driving chip, and the manner of providing the pixel voltage with alternating polarity to the pixel unit by the pixel control line is generally as follows: when the display frame is connected, the voltage of the same pixel control line must be switched between the high potential of the alternating current and the low potential of the alternating current at a high frequency. Each time the polarity is inverted, the voltage of the pixel control line needs to be switched from a high potential to a low potential or from a low potential to a high potential, and the voltage adjustment range of the polarity inversion of the pixel voltage not only increases the power consumption of the display driving chip, but also causes the charging efficiency of the pixel unit to be low.
Disclosure of Invention
In view of the above, the present invention provides a circuit structure and a display driver chip, and mainly aims to improve the charging efficiency of a pixel unit and reduce the power consumption of the display driver chip.
In order to achieve the above purpose, the present invention mainly provides the following technical solutions:
in a first aspect, the present invention provides a circuit arrangement comprising:
a first charge sharing circuit, a second charge sharing circuit, and a plurality of pixel control lines;
the first charge sharing circuit is used for recovering the pixel voltage of the first pixel control line when the data signal input of the current display frame is finished and storing the pixel voltage as the first pixel voltage; supplying the first pixel voltage to a second pixel control line when a data signal of a next display frame is input; wherein the first pixel control line is a pixel control line that receives a first pixel voltage provided by the first charge-sharing circuit at the current display frame, the second pixel control line is a pixel control line that receives a second pixel voltage provided by the second charge-sharing circuit at the current display frame, and polarities of the first pixel voltage and the second pixel voltage are opposite;
the second charge sharing circuit is configured to recover and store a pixel voltage of the second pixel control line as a second pixel voltage when the data signal input of the current display frame is ended; the second pixel voltage is supplied to the first pixel control line when the data signal of the next display frame is input.
In a second aspect, the present invention provides a display driving chip, which includes the circuit structure of the first aspect.
By means of the technical scheme, the circuit structure and the display driving chip provided by the invention comprise a first charge sharing circuit, a second charge sharing circuit and a plurality of pixel control lines. The first charge sharing circuit recovers a pixel voltage of the first pixel control line and stores the pixel voltage as a first pixel voltage when the data signal input of the current display frame is finished. Similarly, the second charge share circuit recovers the pixel voltage of the second pixel control line at the end of the data signal input of the current display frame and stores the pixel voltage as the second pixel voltage. The first pixel control line is a pixel control line for receiving a first pixel voltage provided by the first charge sharing circuit in a current display frame, the second pixel control line is a pixel control line for receiving a second pixel voltage provided by the second charge sharing circuit in the current display frame, and polarities of the first pixel voltage and the second pixel voltage are opposite. The first charge sharing circuit supplies the stored first pixel voltage to the second pixel control line and the second charge sharing circuit supplies the stored second pixel voltage to the first pixel control line when the data signal of the next display frame is input. It can be seen that, in the solution provided by the present invention, the first charge share circuit can recover the pixel voltage of the pixel control line to which the first pixel voltage is supplied when the data signal input of the current display frame is finished, and supply the recovered pixel voltage as the precharge to the pixel control line requiring the first pixel voltage when the data signal input of the next display frame is finished. Similarly, the second charge share circuit can recover the pixel voltage of the pixel control line to which the second pixel voltage is supplied when the data signal input of the current display frame is ended, and supply the recovered pixel voltage as a precharge to the pixel control line requiring the second pixel voltage when the data signal input of the next display frame is ended. The first charge sharing circuit and the second charge sharing circuit can reduce the voltage adjustment range of the pixel voltage polarity conversion of each pixel control line when each pixel control line performs the voltage polarity conversion aiming at the next display frame, thereby reducing the voltage consumed by the pixel unit during the voltage polarity conversion, reducing the power consumption required by the display driving chip and improving the charging efficiency of the pixel unit.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit configuration provided by one embodiment of the present invention;
fig. 2 is a schematic diagram of a circuit structure according to another embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a circuit structure, which mainly includes: the pixel control line 11, the first charge sharing circuit 12, and the second charge sharing circuit 13, the connection relationship and the interaction of the respective parts in the circuit structure are specifically described below:
pixel control line 11:
the number of the pixel control lines 11 is plural. The pixel control line 11 is used to supply a pixel voltage to a pixel unit of the connected display panel.
The liquid crystal in the display panel is ac-driven, and for any pixel unit, the polarity of its pixel voltage in the current display frame needs to be opposite to the polarity of its pixel voltage in the previous display frame. Therefore, in the engaging stage of each display frame, the voltage provided by the pixel control line 11 needs to complete a polarity inversion.
For example, in a current display frame, the pixel control lines of the pixel cells in the even-numbered columns supply the pixel voltages with positive polarity. And the pixel control lines corresponding to the pixel units in the odd columns provide pixel voltages with negative polarity. In the next display frame, the pixel control lines of the pixel units in the even columns provide the pixel voltages with negative polarity, and the pixel control lines of the pixel units in the odd columns provide the pixel voltages with positive polarity.
The first charge share circuit 12:
the first charge share circuit 12 is connected to all the pixel control lines 11 and is used to supply a first pixel voltage to the pixel control lines 11, the polarity of which may be determined based on the service requirements, but the polarity of which needs to be opposite to the polarity of a second pixel voltage supplied by the second charge share circuit 13. The first charge sharing circuit 12 supplies the first pixel voltage to only a part of the pixel control lines 11 in one display frame, and supplies the power to the pixel control lines 11 differently in two adjacent display frames.
A first charge share circuit 12 for recovering and storing a pixel voltage of a first pixel control line as a first pixel voltage when the input of the data signal of the current display frame is finished; the first pixel voltage is supplied to the second pixel control line when the data signal of the next display frame is input. The first pixel control line is the pixel control line 11 that receives the first pixel voltage provided by the first charge sharing circuit 12 in the current display frame, and the second pixel control line is the pixel control line 11 that receives the second pixel voltage provided by the second charge sharing circuit 13 in the current display frame.
The first pixel control line and the second pixel control line fluctuate with the fluctuation of the display frame. For example, the pixel control line 11 receiving the first pixel voltage provided by the first charge sharing circuit 12 in the current display frame is the first pixel control line in the current display frame. Since it receives the second pixel voltage supplied from the second charge share circuit 13 when the data signal of the next display frame is input, it becomes the second pixel control line under the next current display frame when the next display frame is taken as the current display frame, for receiving the first pixel voltage supplied from the first charge share circuit 12 again. Wherein the first pixel voltage and the second pixel voltage have opposite polarities
Illustratively, in the current display frame "display frame 1", the pixel control lines corresponding to the pixel cells in the even columns (referred to simply as even column control lines) receive the first pixel voltage provided by the first charge-sharing circuit 12, and thus, these even column control lines are the first pixel control lines. The pixel control lines corresponding to the pixel units in the odd columns (referred to as odd column control lines for short) receive the second pixel voltage provided by the second charge sharing circuit 13, and thus, these odd column control lines are the second pixel control lines. At the end of the input of the data signal of the display frame 1, the first charge share circuit 12 recovers the pixel voltage of the even column control line and stores it as the first pixel voltage, and the second charge share circuit 13 recovers the pixel voltage of the odd column control line and stores it as the second pixel voltage. When a data signal of the next display frame 2 is input, the first charge share circuit 12 supplies the first pixel voltage to the odd-numbered column control line, and the second charge share circuit 13 supplies the second pixel voltage to the even-numbered column control line. Then when the display frame 2 is taken as the current display frame, since the first charge sharing circuit 12 supplies the first pixel voltage to the odd column control line and the second charge sharing circuit 13 supplies the second pixel voltage to the even column control line in the display frame 2, the odd column control line is taken as the first pixel control line in the current display frame "display frame 2" and the even column control line is taken as the second pixel control line in the current display frame "display frame 2".
The first charge share circuit 12 recovers the pixel voltage of the first pixel control line at the end of the data signal input of the current display frame and stores it as the first pixel voltage. When the data signal input of the current display frame is finished, the voltage preparation, namely the pre-charging, needs to be carried out for the next display frame, so that the pixel voltage of the first pixel control line needs to be recovered and stored as the first pixel voltage. The purpose of recovering the pixel voltage and storing the pixel voltage is as follows: firstly, the reuse of the pixel voltage in the first pixel control line is realized, and the power consumption of the display driving chip is reduced. Secondly, the recovered first pixel voltage is used as the voltage adjustment range for pre-charging the second pixel control line to reduce the polarity inversion of the pixel voltage when the second pixel control line performs polarity conversion, thereby improving the charging efficiency for charging the pixel unit corresponding to the second pixel control line,
the pixel voltage recovered by the first charge sharing circuit 12 is not the first pixel voltage provided to the first pixel control line, but is the pixel voltage required by the working of the pixel unit corresponding to the first pixel control line after being adjusted based on the first pixel voltage. Illustratively, the first charge-sharing circuit 12 stores the first pixel voltage of +4 volts, and when the first pixel control line is supplied with a voltage of +4 volts, the pixel voltage of the pixel unit is a +5 volt voltage that again climbs on the basis of +4 volts because +4 volts is not a pixel voltage available when the pixel unit corresponding to the first pixel control line operates. After the pixel cell has used a pixel voltage of +5 volts, it is recycled by the first charge-sharing circuit 12. The recovered voltage may not be +5V due to memory consumption during use of the pixel voltage +5 volts by the pixel cell.
The first charge share circuit 12 recovers and stores the pixel voltage of the first pixel control line as the first pixel voltage, and then supplies the first pixel voltage to the second pixel control line when the data signal of the next display frame is input, and the first pixel voltage is supplied to the second pixel control line so as to reduce the voltage adjustment range of the polarity inversion of the pixel voltage when the polarity of the second pixel control line is switched. Illustratively, the first charge-sharing circuit 12 stores the first pixel voltage of +4 volts, and when the second pixel control line is supplied with a voltage of +4 volts, the pixel voltage of the pixel unit is a +5 volt voltage that again climbs on the basis of +4 volts because +4 volts is not a pixel voltage available when the pixel unit corresponding to the second pixel control line operates.
The second charge share circuit 13:
a second charge sharing circuit 13 is connected to all the pixel control lines 11 for supplying a second pixel voltage to the pixel control lines, the polarity of the second pixel voltage being determined based on the traffic requirements, but its polarity needs to be opposite to the polarity of the first pixel voltage supplied by the first charge sharing circuit 12. The second charge sharing circuit 13 supplies the second pixel voltage to only a part of the pixel control lines in one display frame, and supplies the pixel control lines with different power in two adjacent display frames.
A second charge share circuit 13 for recovering and storing the pixel voltage of the second pixel control line as a second pixel voltage when the data signal input of the current display frame is ended; the second pixel voltage is supplied to the first pixel control line when the data signal of the next display frame is input. The first pixel control line is the pixel control line 11 that receives the first pixel voltage provided by the first charge sharing circuit 12 in the current display frame, and the second pixel control line is the pixel control line 11 that receives the second pixel voltage provided by the second charge sharing circuit 13 in the current display frame. It should be noted that the first pixel control line and the second pixel control line will change with the change of the display frame, and the change principle is described in detail in the first charge sharing circuit 12, and will not be described herein again.
The second charge share circuit 13 recovers the pixel voltage of the second pixel control line at the end of the data signal input of the current display frame and stores it as the second pixel voltage. When the data signal input of the current display frame is finished, the voltage preparation, namely the pre-charging, needs to be carried out for the next display frame, so that the pixel voltage of the second pixel control line needs to be recovered and stored as the second pixel voltage. The purpose of recovering the pixel voltage and storing the pixel voltage is as follows: first, the reuse of the pixel voltage in the second pixel control line is realized, and the power consumption of the display driving chip is reduced. Secondly, the recovered second pixel voltage is used as the voltage adjustment amplitude for pre-charging the first pixel control line to reduce the polarity inversion of the pixel voltage when the first pixel control line performs polarity conversion, thereby improving the charging efficiency for charging the pixel unit corresponding to the first pixel control line,
the pixel voltage recovered by the second charge sharing circuit 13 is not completely the second pixel voltage supplied to the second pixel control line, but is adjusted based on the second pixel voltage, and the pixel voltage required by the pixel unit corresponding to the second pixel control line when operating. Illustratively, the second charge-sharing circuit 13 stores the second pixel voltage of-4 volts, and when the second pixel control line is supplied with a voltage of-4 volts, the pixel voltage of the pixel unit is a voltage of-5 volts that again climbs on the basis of-4 volts because-4 volts is not a pixel voltage available when the pixel unit corresponding to the second pixel control line operates. After the pixel cell has used a pixel voltage of-5 volts, it is recycled by the second charge sharing circuit 13. The recovered voltage may not be-5V due to memory consumption of the pixel cell during use of the pixel voltage of-5 volts.
The second charge share circuit 13 recovers the pixel voltage of the second pixel control line and stores the pixel voltage as the second pixel voltage, and supplies the second pixel voltage to the first pixel control line when the data signal of the next display frame is input, the second pixel voltage supplied to the first pixel control line being a voltage adjustment range for reducing the polarity inversion of the pixel voltage when the polarity of the first pixel control line is switched. Illustratively, the second charge-sharing circuit 13 stores the second pixel voltage of-4 volts, and when the first pixel control line is supplied with a voltage of-4 volts, the pixel voltage of the pixel unit is a voltage of-5 volts that again climbs on the basis of-4 volts because-4 volts is not a pixel voltage available when the pixel unit corresponding to the first pixel control line operates.
The circuit structure provided by the embodiment of the invention comprises a first charge sharing circuit, a second charge sharing circuit and a plurality of pixel control lines. The first charge sharing circuit recovers a pixel voltage of the first pixel control line and stores the pixel voltage as a first pixel voltage when the data signal input of the current display frame is ended. Similarly, the second charge share circuit recovers the pixel voltage of the second pixel control line at the end of the data signal input of the current display frame and stores the pixel voltage as the second pixel voltage. The first pixel control line is a pixel control line for receiving a first pixel voltage provided by the first charge sharing circuit in a current display frame, the second pixel control line is a pixel control line for receiving a second pixel voltage provided by the second charge sharing circuit in the current display frame, and polarities of the first pixel voltage and the second pixel voltage are opposite. The first charge sharing circuit supplies the stored first pixel voltage to the second pixel control line and the second charge sharing circuit supplies the stored second pixel voltage to the first pixel control line when the data signal of the next display frame is input. It can be seen that, in the solution provided by the embodiment of the present invention, the first charge share circuit can recover the pixel voltage of the pixel control line to which the first pixel voltage is supplied when the data signal input of the current display frame is ended, and supply the recovered pixel voltage as the precharge to the pixel control line requiring the first pixel voltage when the data signal input of the next display frame is ended. Similarly, the second charge share circuit can recover the pixel voltage of the pixel control line to which the second pixel voltage is supplied when the data signal input of the current display frame is ended, and supply the recovered pixel voltage as a precharge to the pixel control line requiring the second pixel voltage when the data signal input of the next display frame is ended. The first charge sharing circuit and the second charge sharing circuit can reduce the voltage adjustment range of the pixel voltage polarity conversion of each pixel control line when each pixel control line performs the voltage polarity conversion aiming at the next display frame, thereby reducing the voltage consumed by the pixel unit during the voltage polarity conversion, reducing the power consumption required by the display driving chip and improving the charging efficiency of the pixel unit.
Further, according to the circuit structure shown in fig. 1, another embodiment of the present invention further provides a circuit structure, as shown in fig. 2, the circuit structure mainly includes: the pixel control line 11, the first charge sharing circuit 12, the second charge sharing circuit 13, the third charge sharing circuit 14, the first display control element 15, and the second display control element 16, and the connection relationship of the respective portions, the specific composition structure of the respective portions, and the interaction between the respective portions in the circuit structure are specifically described below:
pixel control line 11:
the number of the pixel control lines 11 is plural. The pixel control line 11 is used to supply a pixel voltage to a pixel unit in the connected display panel.
The first charge-sharing circuit 12:
the first charge sharing circuit 12 includes a first energy storage element 121, a first switching element 122, and a plurality of second switching elements 123, wherein one second switching element 123 corresponds to one pixel control line 11. Each of the second switching elements 123 has a first terminal connected to its corresponding pixel control line 11 and a second terminal connected to a first terminal of the first switching element 122. A second terminal of the first switching element 122 is connected to the first energy storage element 121.
The second switching element 123 connected to the first pixel control line is used to turn on when the data signal input for the current display frame is finished. The first switching element 121 is used to turn on when the data signal input for the current display frame is finished. When the data signal input of the current display frame is finished, the first switching element 122 and the second switching element 123 connected to the first pixel control line are turned on to establish communication between the first energy storage element 121 and the first pixel control line, so as to provide a recovery channel for the first energy storage element 121 to recover the pixel voltage on the first pixel control line. Illustratively, as shown in fig. 2, fig. 2 includes pixel control lines 111 to 11n, where n is a positive integer. The first pixel control line is 111, 113 \8230, the pixel control lines in odd columns, such as \8230; 11n-1, etc., and the second switching element 123 connected to the first pixel control line '111, 113 \8230, the second switching element 8230, 11 n-1', etc., is used for turning on when the input of the data signal of the current display frame is finished. The first switching element 121 is used to turn on when the data signal input for the current display frame is finished. S in fig. 2 denotes the source of the switch of the pixel cell.
The first energy storage element 121 is configured to communicate with the first pixel control line when the first switching element 122 and the second switching element 123 connected to the first pixel control line are turned on, recover the pixel voltage of the first pixel control line, and store the pixel voltage as the first pixel voltage. The specific type of the first energy storage element 121 is not specifically limited in this embodiment, and for example, the first energy storage element 121 is a capacitor. For example, as shown in fig. 2, when the first switching element 122 and the second switching element 123 connected to the first pixel control line "111, 113 \8230 \ 8230and 11n-1" are turned on, the first energy storage element 121 is connected to the first pixel control line "111, 113 \8230 \ 8230, 11n-1", recovers the pixel voltage of the first pixel control line "111, 113 \8230 \ 8230, 11n-1", and stores the pixel voltage as the first pixel voltage.
In order to prevent the first pixel voltage stored in the first energy storage element 121 from being transmitted back to the pixel control line 11 before the data signal of the next display frame is input, the first switching element 122 is further configured to be turned off after the first energy storage element 121 stores the first pixel voltage.
In order to realize the voltage polarity inversion of each pixel control line 11 in the next display frame, the first switching element 122 connected to the first pixel control line is turned off when the data signal of the next display frame is input, so as to prevent the first pixel voltage from being transmitted to the first pixel control line when the first energy storage element 121 provides the first pixel voltage externally. The second switching element 123 connected to the second pixel control line is used to turn on when the data signal of the next display frame is input. And the first switching element 122 is used to turn on when the data signal of the next display frame is input. The first switching element 122 turns on and connects the second switching element 123 of the second pixel control line, establishing communication between the first energy storage element 121 and the second pixel control line, so that the first energy storage element 121 provides the first pixel voltage to the second pixel control line. The first energy storage element 121 is configured to provide a first pixel voltage to the second pixel control line when the first switching element 122 and the second switching element 123 connected to the second pixel control line are turned on and the first switching element 122 connected to the first pixel control line is turned off, so as to implement the polarity inversion of the pixel voltage of the second pixel control line in the next display frame. Illustratively, as shown in fig. 2, the second pixel control lines 112, 114, 8230, the first switch elements 122 of the even-numbered columns like the second pixel control line 82309 and 11n are connected to the first pixel control lines 111, 113, 8230, 11n-1 and are turned off when the data signal of the next display frame is input. The second switching element 123 connected to the second pixel control line "112, 114 \8230 \ 8230'; 11n" is turned on when a data signal of a next display frame is input. The first switching element 122 is turned on when a data signal of a next display frame is input. The first energy storage element 121 provides a first pixel voltage to the second pixel control lines "112, 114, 8230, and 11n" when the first switching element 122 and the second switching element 123 connected to the second pixel control lines "112, 114, 8230, and 11n" are turned on and the first switching element 122 connected to the first pixel control lines "111, 113, 8230, 11n-1" is turned off.
The second charge share circuit 13:
the second charge sharing circuit 13 includes a second energy storage element 131, a third switching element 132, and a plurality of fourth switching elements 133, wherein one fourth switching element 133 corresponds to one pixel control line 11; a first terminal of each of the fourth switching elements 133 is connected to its corresponding pixel control line 11, and a second terminal is connected to a first terminal of the third switching element 132; a second terminal of the third switching element 132 is connected to the second energy storage element 131.
And a fourth switching element 133 connected to the second pixel control line for turning on when the data signal input for the current display frame is finished. And a third switching element 132 for turning on when the data signal input for the current display frame is finished. When the data signal input of the current display frame is finished, the third switching element 132 and the fourth switching element 133 connected to the second pixel control line are turned on to establish communication between the second energy storage element 131 and the second pixel control line, and provide a recycling channel for the second energy storage element 131 to recycle the pixel voltage on the second pixel control line. Illustratively, as shown in fig. 2, the fourth switching element 133 connected to the second pixel control line "112, 114 \8230; 11n" is turned on when the data signal input for the current display frame is finished. And a third switching element 132 for turning on when the data signal input for the current display frame is finished.
And a second energy storage element 131 for recovering and storing the pixel voltage of the second pixel control line as the second pixel voltage when the third switching element 132 and the fourth switching element 133 connected to the second pixel control line are turned on. The specific type of the second energy storage element 131 is not specifically limited in this embodiment, and the second energy storage element 131 is a capacitor, for example. Illustratively, as shown in fig. 2, the second energy storage element 131 is configured to recover and store a pixel voltage of the second pixel control line "112, 114 \8230 \ 8230, 11n" as a second pixel voltage when the third switching element 132 and the fourth switching element 133 connected to the second pixel control line "112, 114 \8230 \ 11n" are turned on.
In order to prevent the second pixel voltage stored in the second energy storage element 131 from being transmitted back to the pixel control line before the data signal of the next display frame is input, the third switching element 132 is further configured to be turned off after the second pixel voltage is stored in the second energy storage element 131.
In order to realize the voltage polarity inversion of each pixel control line 11 in the next display frame, the fourth switching element 133 connected to the second pixel control line is turned off when the data signal of the next display frame is input. So as to prevent the second pixel voltage from being transmitted to the second pixel control line when the second energy storage element 131 provides the second pixel voltage to the outside. The fourth switching element 133 connected to the first pixel control line is used to turn on when the data signal of the next display frame is input. And the third switching element 132 is turned on when the data signal of the next display frame is input. The third switching element 132 and the fourth switching element 133 connected to the first pixel control line are turned on to establish communication between the second energy storing element 131 and the first pixel control line, so that the second energy storing element 131 supplies the second pixel voltage to the first pixel control line. The second energy storage element 131 provides the second pixel voltage for the first pixel control line when the third switching element 132 and the fourth switching element 133 connected to the first pixel control line are turned on and the fourth switching element 133 connected to the second pixel control line is turned off, so as to realize the inversion of the polarity of the pixel voltage of the second pixel control line in the next display frame. Illustratively, as shown in fig. 2, the fourth switching element 133 connected to the second pixel control lines "112, 114 \8230 \ 823011 n" is turned off when the data signal of the next display frame is input. The fourth switching element 133 connected to the first pixel control line '111, 113 \8230 \ 8230 \ 8230and 11 n-1' is turned on when a data signal of a next display frame is input. The third switching element 132 is turned on when a data signal of the next display frame is input. The second energy storage element 131 is turned on between the third switching element 132 and the fourth switching element 133 connected to the first pixel control line "111, 113 \8230; 11n-1", and when the fourth switching element 133 connected to the second pixel control line ' 112, 114 \8230 \ 823030 ' \ 11n ' is turned off, the second pixel voltage is provided to the first pixel control line ' 111, 113 \8230 \ 8230 \ 11n-1 '.
The third charge share circuit 14:
a third charge share circuit 14 for neutralizing the voltages of all the pixel control lines 11 to a third pixel voltage before the data signal of the next display frame is input after the first charge share circuit 12 recovers the pixel voltage of the first pixel control line and the second charge share circuit 13 recovers the second pixel voltage of the second pixel control line.
After the first charge sharing circuit 12 and the second charge sharing circuit 13 recover the pixel voltage from their corresponding pixel control lines 11, there may still be pixel voltages remaining in the pixel control lines 11, and these remaining pixel voltages will affect the inverted pixel voltage when the polarity of the pixel voltage of the pixel control lines 11 is inverted, for example, the inverted pixel voltage will be neutralized. Therefore, in order to remove the remaining pixel voltage in the pixel control line 11, the third charge share circuit 14 neutralizes the voltages of all the pixel control lines 11 to the third pixel voltage before the data signal of the next display frame is input after the first charge share circuit 12 recovers the pixel voltage of the first pixel control line and the second charge share circuit 13 recovers the second pixel voltage of the second pixel control line. The third pixel voltage may be determined based on traffic demand, for example, the third pixel voltage is a non-polar voltage of 0V.
The third charge sharing circuit 14 includes a third energy storage element 141, a fifth switching element 142, and a plurality of sixth switching elements 143, wherein one sixth switching element 143 corresponds to one pixel control line 11. Each of the sixth switching elements 143 has a first terminal connected to its corresponding pixel control line 11 and a second terminal connected to a first terminal of the fifth switching element 142. A second terminal of the fifth switching element 142 is connected to the third energy storage element 141.
The fifth switching element 142 is turned on after the first charge share circuit 12 recovers the pixel voltage of the first pixel control line and the second charge share circuit 13 recovers the second pixel voltage of the second pixel control line. The sixth switching element 143 is turned on after the first charge share circuit 12 recovers the pixel voltage of the first pixel control line and the second charge share circuit 13 recovers the second pixel voltage of the second pixel control line. After the fifth switching element 142 and the sixth switching element 143 are turned on, the third energy storage element 141 is connected to all the pixel control lines 11, so that the third energy storage element 141 can acquire the pixel voltages remaining on all the pixel control lines 11, and neutralize the acquired pixel voltages. The third energy storage element 141 neutralizes the voltage of all the pixel control lines 11 to the third pixel voltage after both the fifth switching element 142 and the sixth switching element 143 are turned on.
Illustratively, as shown in fig. 2, the fifth switching element 142 is turned on after the first charge sharing circuit 12 recovers the pixel voltage of the first pixel control line "111, 113 \8230 \ 8230, 11n-1 ″, and the second charge sharing circuit 13 recovers the second pixel voltage of the second pixel control line" 112, 114 \8230 \ 8230, 11n ″. The sixth switching element 143 is turned on after the first charge share circuit 12 recovers the pixel voltage of the first pixel control line "111, 113 \8230 \ 8230 \ 8230and 11n-1 ″, and the second charge share circuit 13 recovers the second pixel voltage of the second pixel control line" 112, 114 \8230 \ 8230and 11n ″. The third energy storage element 141 neutralizes the voltage of all the pixel control lines '111, 112 \8230; 11 n' to the third pixel voltage after the fifth switching element 142 and the sixth switching element 143 are both turned on.
Further, when the fifth switching element 142 and the sixth switching element 143 are turned on, the third energy storage element 141 is prevented from neutralizing the voltage stored in the second energy storage element 121 and the first energy storage element 131, and the first switching element 122 and the third switching element 132 need to be turned off.
First display control element 15:
the first display control element 15 is configured to trigger the voltages of all the pixel control lines 11 and the third charge sharing circuit 14 to the third pixel voltage when it is monitored that the pixel voltage recovered by the first charge sharing circuit 12 reaches a first preset voltage and the pixel voltage recovered by the second charge sharing circuit 13 reaches a second preset voltage, or when it is monitored that the duration of the pixel voltage recovered by the first charge sharing circuit 12 reaches the first preset duration and the duration of the pixel voltage recovered by the second charge sharing circuit 13 reaches the second preset duration.
When the first display control element 15 monitors that the pixel voltage recovered by the first charge sharing circuit 12 reaches the first preset voltage and the pixel voltage recovered by the second charge sharing circuit 13 reaches the second preset voltage, it indicates that the voltage recovery work of the first charge sharing circuit 12 and the second charge sharing circuit 13 is substantially completed, and if the voltage recovery work is continued, the voltage recovery effect is not good, so that the voltages of the third charge sharing circuit 14 and all the pixel control lines 11 are triggered to reach the third pixel voltage, so that the third charge sharing circuit 14 performs voltage neutralization processing on all the pixel control lines in time.
When it is monitored that the duration of the pixel voltage recovery of the first charge sharing circuit 12 reaches a first preset duration and the duration of the pixel voltage recovery of the second charge sharing circuit 13 reaches a second preset duration, the first display control element 15 indicates that the duration of the voltage recovery operation of the first charge sharing circuit 12 and the second charge sharing circuit 13 is longer, so as not to affect the connection of the display frame, and therefore, the voltages of the third charge sharing circuit 14 and all the pixel control lines 11 are triggered to the third pixel voltage, so that the third charge sharing circuit 14 performs voltage neutralization processing on all the pixel control lines in time.
The second display control element 16:
a second display control element 16, configured to trigger the third charge share circuit 14 to supply the third pixel voltage to the second pixel control line if it is determined that the second pixel control line requires the third pixel voltage when the data signal of the next display frame is input; and/or trigger the third charge share circuit 14 to provide the third pixel voltage to the first pixel control line if it is determined that the first pixel control line requires the third pixel voltage. The method for determining that the second pixel control line requires the third pixel voltage comprises the following steps: and the data signal of the next display frame carries the requirement information of the third pixel voltage, and if the requirement information exists in the data signal, the third pixel voltage required by the second pixel control line is determined. Similarly, the third pixel voltage required for the first pixel control line may be determined in the same manner.
Some display frames may require such a third pixel voltage as a non-polar voltage for some pixel control lines, and therefore, if it is determined that the third pixel voltage is required for the first pixel control line or the second pixel control line when the data signal of the next display frame is input, the third charge share circuit 14 is directly triggered to provide the third pixel voltage for the third pixel control line.
For example, as shown in fig. 2, when a data signal of a next display frame is input, the second pixel control lines "112 and 114 \8230, the third pixel voltage is required for the second switching element 142, the sixth switching element 143 connected to the second pixel control lines" 112 and 114 \8230, the sixth switching element \8230, and the sixth switching element 11n are turned on, and the third energy storage element 141 provides the third pixel voltage for the second pixel control lines "112 and 114 \8230, and the third pixel voltage for the second energy storage element 141. Meanwhile, the second switching element 123 and the fourth switching element 133 connected to the second pixel control line "112, 114 \8230; '11 n' are turned off.
Further, according to the above embodiment, another embodiment of the present invention further provides a display driving chip, where the display driving chip includes the circuit structure shown in fig. 1 or fig. 2.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (9)
1. A circuit arrangement, characterized in that the circuit arrangement comprises: a first charge sharing circuit, a second charge sharing circuit, and a plurality of pixel control lines;
the first charge sharing circuit is used for recovering the pixel voltage of the first pixel control line when the data signal input of the current display frame is finished and storing the pixel voltage as the first pixel voltage; supplying the first pixel voltage to a second pixel control line when a data signal of a next display frame is input;
the second charge sharing circuit is configured to recover and store a pixel voltage of the second pixel control line as a second pixel voltage when the data signal input of the current display frame is ended; supplying the second pixel voltage to the first pixel control line when the data signal of the next display frame is input;
wherein the first pixel control line is a pixel control line that receives a first pixel voltage provided by the first charge sharing circuit at the current display frame, the second pixel control line is a pixel control line that receives a second pixel voltage provided by the second charge sharing circuit at the current display frame, and polarities of the first pixel voltage and the second pixel voltage are opposite;
the first charge sharing circuit comprises a first energy storage element, a first switching element and a plurality of second switching elements, wherein one second switching element corresponds to one pixel control line; a first end of each second switch element is connected with the corresponding pixel control line, and a second end of each second switch element is connected with a first end of the corresponding first switch element; the second end of the first switching element is connected with the first energy storage element;
the second switch element is connected with the first pixel control line and is used for being started when the data signal input of the current display frame is finished;
the first switch element is used for being turned on when the input of the data signal of the current display frame is finished;
the first energy storage element is configured to recover and store a pixel voltage of the first pixel control line as the first pixel voltage when the first switching element and the second switching element connected to the first pixel control line are turned on.
2. The circuit structure of claim 1, further comprising:
a third charge sharing circuit for neutralizing the voltages of all the pixel control lines to a third pixel voltage before the data signal of the next display frame is input after the first charge sharing circuit recovers the pixel voltage of the first pixel control line and the second charge sharing circuit recovers the second pixel voltage of the second pixel control line.
3. The circuit structure of claim 2, further comprising:
and the first display control element is used for triggering the voltages of all pixel control lines in the third charge sharing circuit and all the pixel control lines to the third pixel voltage when the pixel voltage recovered by the first charge sharing circuit is monitored to reach a first preset voltage and the pixel voltage recovered by the second charge sharing circuit reaches a second preset voltage or when the duration of the pixel voltage recovered by the first charge sharing circuit is monitored to reach the first preset duration and the duration of the pixel voltage recovered by the second charge sharing circuit reaches the second preset duration.
4. The circuit structure of claim 2, further comprising:
a second display control element, configured to trigger the third charge sharing circuit to supply the third pixel voltage to a second pixel control line when it is determined that the second pixel control line requires the third pixel voltage when a data signal of a next display frame is input; and/or, if it is determined that the first pixel control line requires the third pixel voltage, triggering the third charge sharing circuit to provide the third pixel voltage to the first pixel control line.
5. The circuit structure of claim 1, wherein the first switching element is further configured to turn off after the first energy storage element stores the first pixel voltage;
and/or the presence of a gas in the gas,
a second switching element connected to the first pixel control line, for turning off when the data signal of the next display frame is input;
a second switching element connected to the second pixel control line, for turning on when the data signal of the next display frame is input;
the first switching element is used for being turned on when the data signal of the next display frame is input;
the first energy storage element is used for providing the first pixel voltage for the second pixel control line when the first switch element and the second switch element connected with the second pixel control line are turned on and the first switch element connected with the first pixel control line is turned off.
6. The circuit structure of claim 1, wherein the second charge sharing circuit comprises a second energy storage element, a third switching element, and a plurality of fourth switching elements, wherein one fourth switching element corresponds to one pixel control line; a first end of each fourth switching element is connected with the corresponding pixel control line, and a second end of each fourth switching element is connected with a first end of the third switching element; the second end of the third switching element is connected with the second energy storage element;
a fourth switching element connected to the second pixel control line, for turning on when the data signal input of the current display frame is finished;
the third switching element is used for being turned on when the input of the data signal of the current display frame is finished;
and the second energy storage element is used for recovering the pixel voltage of the second pixel control line and storing the pixel voltage as the second pixel voltage when the third switching element and a fourth switching element connected with the second pixel control line are turned on.
7. The circuit structure of claim 6, wherein the third switching element is further configured to turn off after the second energy storage element stores the second pixel voltage;
and/or the presence of a gas in the gas,
a fourth switching element connected to the second pixel control line, for turning off when the data signal of the next display frame is input;
a fourth switching element connected to the first pixel control line, for turning on when the data signal of the next display frame is input;
the third switching element is turned on when a data signal of the next display frame is input;
and the second energy storage element is used for providing the second pixel voltage for the first pixel control line when the third switching element and a fourth switching element connected with the first pixel control line are turned on and the fourth switching element connected with the second pixel control line is turned off.
8. The circuit structure of claim 2, wherein the third charge sharing circuit comprises a third energy storage element, a fifth switching element, and a plurality of sixth switching elements, wherein one sixth switching element corresponds to one pixel control line; a first end of each sixth switching element is connected with the corresponding pixel control line, and a second end of each sixth switching element is connected with a first end of the fifth switching element; a second end of the fifth switching element is connected with the third energy storage element;
the fifth switching element is configured to be turned on after the first charge sharing circuit recovers the pixel voltage of the first pixel control line and the second charge sharing circuit recovers the second pixel voltage of the second pixel control line;
the sixth switching element is configured to be turned on after the first charge sharing circuit recovers the pixel voltage of the first pixel control line and the second charge sharing circuit recovers the second pixel voltage of the second pixel control line;
and the third energy storage element is used for neutralizing the voltage of all the pixel control lines to a third pixel voltage after the fifth switching element and each sixth switching element are turned on.
9. A display driver chip, characterized in that it comprises a circuit arrangement according to any one of claims 1 to 8.
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| US5528256A (en) * | 1994-08-16 | 1996-06-18 | Vivid Semiconductor, Inc. | Power-saving circuit and method for driving liquid crystal display |
| KR20070023099A (en) * | 2005-08-23 | 2007-02-28 | 엘지.필립스 엘시디 주식회사 | Liquid Crystal Display and Driving Method Thereof |
| KR101224459B1 (en) * | 2007-06-28 | 2013-01-22 | 엘지디스플레이 주식회사 | Liquid Crystal Display |
| US20100149171A1 (en) * | 2008-12-16 | 2010-06-17 | Da-Rong Huang | Source driver for driving a panel and related method for controlling a display |
| TWI517128B (en) * | 2010-04-08 | 2016-01-11 | 友達光電股份有限公司 | Display device, display device driving method and source driving circuit |
| TWI517119B (en) * | 2010-12-17 | 2016-01-11 | 友達光電股份有限公司 | Source driver circuit, displayer and operation method thereof |
| US20120218316A1 (en) * | 2011-02-24 | 2012-08-30 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Lcd device and driving method thereof |
| TWI529691B (en) * | 2014-04-08 | 2016-04-11 | 友達光電股份有限公司 | Data driver and display device driving method |
| TWM539635U (en) * | 2016-08-18 | 2017-04-11 | 奕力科技股份有限公司 | Source driver |
| CN108198538B (en) * | 2018-01-05 | 2021-01-26 | 京东方科技集团股份有限公司 | Display device, driving method thereof, driving device and display substrate |
| CN112669781B (en) * | 2020-12-14 | 2022-04-12 | 北京奕斯伟计算技术有限公司 | Display processing method, display processing device and display panel |
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