CN117809591A - Driving method and driving system of display screen and display device - Google Patents

Abstract

The application discloses a driving method, a driving system and a display device of a display screen, wherein the driving method is characterized in that a plurality of rows of pixel units are divided into a first part of pixels comprising first rows of pixel units and a second part of pixels comprising second rows of pixel units, and at least one second row of pixel units is arranged between every two adjacent first rows of pixel units; acquiring first image data of a first part of pixels and second image data of a second part of pixels; charging a first portion of pixels according to the first image data during a first frame display period; and charging a second portion of pixels in accordance with the second image data during a second frame display period; wherein the first frame display period and the second frame display period are adjacent two frame display periods; the method and the device can improve the saw tooth sense of the static picture while realizing frequency multiplication, and further optimize the display effect of the display screen.

Description

Driving method and driving system of display screen and display device

Technical Field

The application relates to the technical field of display driving, in particular to a driving method and a driving system of a display screen and a display device.

Background

At present, in the TV industry, a common 60hz or 120hz screen needs to be doubled to 120hz or 240hz by using a DLG technology or an HSR technology, which has the advantages that the refresh rate is improved by 2 times at maximum, the resolution of the 4k x 2k@120hz signal or the 4k x 2k@60hz signal in the vertical direction is reduced to half, and the resolution is changed into 4k x 1k@240hz or 4k x 1k@120hz, because the screen doubling technology is that two rows of pixels are simultaneously turned on or off, pixels with the same content are displayed, the definition is reduced, and a jaggy feel exists in a static picture, so that the picture display effect is affected.

Disclosure of Invention

According to the driving method, the driving system and the display device of the display screen, the problem that the display screen has saw tooth feel under a static picture due to the fact that the definition of the display screen is reduced due to the current frequency doubling scheme can be effectively relieved.

The application provides a driving method of a display screen, the display screen comprises a plurality of row pixel units arranged in columns, the driving method comprises the steps of dividing the plurality of row pixel units into a first part of pixels and a second part of pixels, taking each row pixel unit in the first part of pixels as a first row pixel unit, taking each row pixel unit in the second part of pixels as a second row pixel unit, and spacing at least one second row pixel unit between every two adjacent first row pixel units; acquiring image data to be displayed, and acquiring first image data corresponding to the first part of pixels and second image data corresponding to the second part of pixels according to the image data to be displayed; charging the first part of pixels according to the first image data in a first frame display period, so that the display screen displays an image picture corresponding to the first image data; charging the second part of pixels according to the second image data in a second frame display period, so that the display screen displays an image picture corresponding to the second image data; the first frame display period and the second frame display period are adjacent two frame display periods.

In some embodiments, the driving method of the display screen obtains, according to the image data to be displayed, first image data corresponding to the first portion of pixels and second image data corresponding to the second portion of pixels, by dividing the image data to be displayed into odd frame image data and even frame image data; and acquiring first image data corresponding to the first part of pixels in the odd-numbered frame image data, and acquiring second image data corresponding to the second part of pixels in the even-numbered frame image data.

In some embodiments, the driving method of the display screen charges the first portion of pixels in a first frame display period according to the first image data by generating the first data voltage and a first row control signal according to the first image data; and starting the first row of pixel units row by row in the first frame display period according to a first row control signal, so that the first data voltage is written into the corresponding first row of pixel units.

In some embodiments, the driving method of the display screen charges the second portion of pixels in a second frame display period according to the second image data by generating the second data voltage and a second row scan signal according to the second image data; and turning on the second row of pixel units line by line in sequence in the second frame display period according to a second row scanning signal, so that the second data voltage is written into the corresponding second row of pixel units.

In some embodiments, the first row of pixel units is an odd row of pixel units, and the second row of pixel units is an even row of pixel units.

The embodiment of the application also provides a driving system of the display screen, wherein the display screen comprises a plurality of row pixel units which are arranged in columns, and the row pixel units form a first part of pixels and a second part of pixels; each row of pixel units in the first part of pixels are first row of pixel units, each row of pixel units in the second part of pixels are second row of pixel units, and at least one second row of pixel units are spaced between every two adjacent first row of pixel units; the driving system comprises a main control module, a time sequence control module, a row driving module and a column driving module; the main control module comprises a data acquisition unit, a first storage unit and a second storage unit; the first storage unit is used for storing first image data corresponding to the first part of pixels, and the second storage unit is used for storing second image data corresponding to the second part of pixels; the data acquisition unit is used for reading the first image data or the second image data; the time sequence control module is connected with the data acquisition unit and is used for outputting a first row control signal and a first column control signal according to the first image data in a first frame display period and outputting a second row control signal and a second column control signal according to the second image data in a second frame display period; the first frame display period and the second frame display period are adjacent two display periods; the row driving module is respectively connected with the time sequence control module, the first part of pixels and the second part of pixels, and is used for outputting a first row scanning signal to control the first part of pixels to be opened according to a first row control signal and outputting a second row scanning signal to control the second part of pixels to be opened according to the second row control signal; the column driving module is connected with the time sequence control module, the first part of pixels and the second part of pixels, and is used for outputting a first data voltage to charge the first part of pixels according to the first column control signal and outputting a second data voltage to charge the second part of pixels according to the second column control signal.

In some embodiments, the driving system of the display screen, the row driving module is specifically configured to output the first row scanning signal according to the first row control signal to turn on each of the first row pixel units sequentially row by row in a first frame display period; and in a second frame display period, outputting the second line scanning signals according to the second line control signals, and sequentially starting each second line of pixel units line by line.

In some embodiments, the driving system of the display screen is specifically configured to output, when the first row of pixel units are turned on, the first data voltage according to the first column control signal, and when the second row of pixel units are turned on, the second data voltage according to the second column control signal, and the second data voltage is output to charge the second row of pixel units.

In some embodiments, the driving system of the display screen, the first row control signal includes a first row clock signal and a first row synchronization signal, and the second row control signal includes a second row clock signal and a second row synchronization signal; the first column control signal includes a first column clock signal and a first field sync signal, and the second column control signal includes a second column clock signal and a second field sync signal.

The embodiment of the application also provides a display device, which comprises a display screen and the driving system of the display screen, wherein the driving system is connected with the display screen and is used for providing data voltage for the display screen.

According to the driving method, the driving system and the display device of the display screen, the plurality of rows of pixel units of the display screen are divided into the first part of pixels and the second part of pixels, and the first row of pixel units in the first part of pixels and the second row of pixel units in the second part of pixels are distributed in a cross-mixing mode, namely at least two second row of pixel units are arranged between two adjacent first row of pixel units at intervals. Then, when the display screen is driven to display a single frame picture, only the first part of pixels or the second part of pixels are driven to display, namely, each single frame picture is the display content of the part of pixels, so that the frequency doubling effect is achieved; although the resolution ratio is reduced for each frame of picture, because the high refresh rate is continuous pictures seen by human eyes, the frequency doubling effect is achieved, and meanwhile the saw tooth feeling of the static pictures is improved, so that the display effect of the display screen is optimized.

Drawings

Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic layout diagram of row pixel units in a display screen according to an embodiment of the present application;

fig. 2 is a flow chart of a driving method of a display screen according to an embodiment of the present application.

Fig. 3 is a schematic distribution diagram of a first portion of pixels and a second portion of pixels in a driving method of a display screen according to an embodiment of the present application.

Fig. 4 is a flowchart illustrating a step 200 in a method for driving a display screen according to an embodiment of the present application.

Fig. 5 and fig. 6 are schematic flow diagrams of step 300 in the driving method of the display screen according to the embodiment of the present application.

Fig. 7 is a schematic display diagram of a first portion of pixels and a second portion of pixels in a driving method of a display screen according to an embodiment of the present application.

Fig. 8 is a block diagram of a driving system of a display screen according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more features, and in the description of the present invention, a meaning of "a plurality" is two or more, unless otherwise specifically defined.

Referring to fig. 1, the present embodiment provides a display panel, which includes a plurality of row pixel units 101 arranged in columns, each row pixel unit 101 includes a plurality of pixels arranged in rows, each pixel includes at least three first sub-pixels, second sub-pixels and third sub-pixels with different colors, for example, the first sub-pixel is a red sub-pixel R, the second sub-pixel is a green sub-pixel G, and the third sub-pixel is a blue sub-pixel B. Each row of pixel units 101 is correspondingly connected to one gate line, that is, each pixel in the row of pixel units 101 shares one gate line.

Based on the display screen, if the display screen is driven by DLG technology, the row pixel units 101 of two adjacent rows are turned on simultaneously, and the two row pixel units 101 display the same pixel voltage and brightness, so that the display screen frequency multiplication of 4k×2k@120hz to 4k×1k@240hz can be realized, so that the refresh rate is doubled, but the resolution of the display screen in the vertical direction is reduced generally.

Based on the above display screen, referring to fig. 2, a driving method of the display screen is provided in the present application, and the driving method includes:

100. dividing a plurality of row pixel units into a first part of pixels and a second part of pixels, taking each row of pixel units in the first part of pixels as a first row of pixel units, taking each row of pixel units in the second part of pixels as a second row of pixel units, and spacing at least one second row of pixel units between every two adjacent first row of pixel units;

200. acquiring image data to be displayed, and acquiring first image data corresponding to a first part of pixels and second image data corresponding to a second part of pixels according to the image data to be displayed;

300. charging a first part of pixels according to the first image data in a first frame display period, so that the display screen displays an image picture corresponding to the first image data; charging a second part of pixels according to the second image data in a second frame display period, so that the display screen displays an image picture corresponding to the second image data; the first frame display period and the second frame display period are adjacent two frame display periods.

Referring to fig. 3, in this embodiment, a plurality of rows of pixel units of the display screen are divided into two parts, namely a first part of pixels and a second part of pixels, but the first row of pixel units 1011 in the first part of pixels and the second row of pixel units in the second part of pixels are arranged in a cross-mixed manner, that is, at least one second row of pixel units 1012 is spaced between two adjacent first row of pixel units 1011; for example, one second row of pixel units 1012 is spaced between two adjacent first row of pixel units 1011, or two second rows of pixel units 1012 are spaced between two adjacent first row of pixel units 1011, or three second rows of pixel units 1012 are spaced between two adjacent first row of pixel units 1011, and so on. This is not limited in this embodiment, and may be specifically selected according to the actual situation.

When a display screen is driven to display a frame of picture subsequently, acquiring first image data of a first part of pixels in a first frame display period, and driving the first part of pixels to display; and obtaining second image data of a second part of pixels in a second frame display period, driving the second part of pixels to display, wherein the first frame display period is used for displaying a first frame picture, the second frame display period is used for displaying a second frame picture, and the first frame display period and the second frame display period in the embodiment are two adjacent frame display periods, so that the first frame picture and the second frame picture are two adjacent frame pictures. In the application, the frequency multiplication effect is achieved by only partially displaying the first frame of picture and the second frame of picture, although the resolution ratio is reduced for each frame of picture, the frequency multiplication effect is achieved and the static picture can be improved due to the fact that the resolution ratio is reduced for each frame of picture, and the display effect of the display screen is optimized due to the fact that the resolution ratio is high and the continuous picture is seen for human eyes.

Referring to fig. 4, in some embodiments, step 200 includes:

210. dividing image data to be displayed into odd frame image data and even frame image data;

220. first image data corresponding to a first part of pixels in the odd-numbered frame image data are obtained, and second image data corresponding to a second part of pixels in the even-numbered frame image data are obtained.

In order to conveniently acquire first image data corresponding to the first part of pixels and second image data of the second part of pixels, dividing the image data to be displayed into odd-numbered frame image data and even-numbered frame image data according to the required display sequence and by taking a frame as a unit; thereafter, first image data of a first portion of pixels is acquired from the odd-numbered frame image data, and second image data of a second portion of pixels is acquired from the even-numbered frame image data. The corresponding image frames displayed by the first partial pixels are controlled to be odd frame frames according to the first image data, and the image frames displayed by the second partial pixels are controlled to be even frame frames according to the second image data. That is, the first frame display period in this embodiment is a display period of an odd frame, and the second frame display period is a display period of an even frame, and the odd frame and the even frame are alternately displayed.

Referring to fig. 5, in some embodiments, step 300 includes:

310. generating a first data voltage and a first row control signal according to the first image data;

320. and starting the pixel units of the first row by row in the first frame display period according to the first row control signal, so that the pixel units of the corresponding first row write in the first data voltage.

In this embodiment, a first data voltage and a second row control signal are generated according to the first image data, and the first row control signal controls the first row of pixel units in the first part of pixels to be turned on sequentially. When the first row of pixel units are turned on, the first data voltage is written into the corresponding first row of pixel units to charge the first row of pixel units. In this embodiment, when the first data voltage is written into the first row of pixel units, only the first row of pixel units is turned on each time, and when the first row of pixel units writes the first data voltage, the next row of pixel units is turned on, and so on, the first part of pixels are controlled to write the first data voltage in the first frame display period, and then the first part of pixels are controlled to display in the first frame display period, so that the picture display is completed.

Referring to fig. 6, in some embodiments, step 300 further comprises:

330. generating a second data voltage and a second line scan signal according to the second image data;

340. and sequentially turning on the second row of pixel units row by row in a second frame display period according to the second row scanning signal, so that the corresponding second row of pixel units write in second data voltage.

In this embodiment, a second data voltage and a second row control signal are generated according to the second image data, and the second row control signal controls the second row of pixel units in the second part of pixels to be turned on sequentially. When the second row of pixel units are turned on, the second data voltage is written into the corresponding second row of pixel units to charge the second row of pixel units. In this embodiment, when the second data voltage is written into the second row of pixel units, only one row of the second row of pixel units is turned on at a time, and when the second row of pixel units is written with the second data voltage, the next row of pixel units is turned on, and so on, the second part of pixels are controlled to be written with the second data voltage in the second frame display period, so that the picture display is completed. Specifically, as shown in fig. 7, in the present embodiment, the pixel units of the first row are controlled to write the first data voltage according to the first row control signal to display in the first frame display period; and controlling the pixel units of the second row to write in second data voltages for display according to the second row control signals in the second frame display period.

In some implementations, the first row of pixel units is an odd row of pixel units, and the second row of pixel units is an even row of pixel units, that is, the odd row of pixel units in the first portion of the pixel display screen in the display screen in this embodiment, and the second portion of pixels is the even row of pixel units in the display screen. In other words, in the embodiment, the odd-line pixel units are controlled to write the first data voltage when the odd-frame image data is displayed, and the even-line pixel units are controlled to write the second data voltage when the even-frame image data is displayed, which is equivalent to the display content of each single-frame display picture being the odd-line pixel units or the even-line pixel units, so as to achieve the frequency doubling effect, improve the problem that the static picture generates the jaggy feeling, and achieve the technical effect of optimizing the display picture.

Referring to fig. 8, the embodiment of the present application further provides a driving system of a display screen, where the display screen 50 includes a plurality of row pixel units arranged in columns, and the plurality of row pixel units form a first portion of pixels and a second portion of pixels; each row of pixel units in the first part of pixels are first row of pixel units, each row of pixel units in the second part of pixels are second row of pixel units, and at least one second row of pixel units are spaced between every two adjacent first row of pixel units.

The driving system in this embodiment includes a main control module 10, a timing control module 20, a row driving module 30, and a column driving module 40, where the main control module 10 includes a data acquisition unit 11, a first storage unit 12, and a second storage unit 13. The data acquisition unit 11 is connected to the first storage unit 12 and the second storage unit 13, respectively, the data acquisition unit 11 is also connected to the timing control module 20, the row driving module 30 is connected to the timing control module 20, the first partial pixel and the second partial pixel, respectively, and the column driving module 40 is connected to the timing control module 20, the first partial pixel and the second partial pixel.

In particular, the first storage unit 12 is configured to store first image data corresponding to a first portion of pixels, and the second storage unit 13 is configured to store second image data corresponding to a second portion of pixels; the data acquisition unit 11 is used for reading the first image data or the second image data; the timing control module 20 is configured to output a first row control signal and a first column control signal according to first image data in a first frame display period, and output a second row control signal and a second column control signal according to second image data in a second frame display period; the first frame display period and the second frame display period are two adjacent display periods; the row driving module 30 is configured to output a first row scanning signal to control the first portion of pixels to be turned on according to the first row control signal, and output a second row scanning signal to control the second portion of pixels to be turned on according to the second row control signal; the column driving module 40 is configured to output a first data voltage to charge a first portion of pixels according to a first column control signal, and output a second data voltage to charge a second portion of pixels according to a second column control signal.

The main control module 10 in this embodiment is an SOC chip, and the SOC chip divides the image data required by the first row of pixel units and the second row of pixel units and stores the image data in two memories respectively, when displaying the first frame of picture, obtains the first image data and outputs the first image data to the timing control module 20, and when displaying the second frame of picture, obtains the second image data and outputs the second image data to the timing control module 20; the timing control module 20 receives the first image data or the second image data and decodes the same. Therefore, the timing control module 20 outputs a first row control signal to the row driving module 30 or outputs a first column control signal to the column driving module 40 according to the first image data; and outputs a second row control signal to the row driving module 30 or outputs a second column control signal to the column driving module 40 according to the second image data. The row driving module 30 outputs the first row scan signal to the odd-numbered row pixel units or outputs the second row scan signal to the even-numbered row pixel units, and at the same time, the column driving module 40 outputs the first data voltage or the second data voltage (i.e. the R/G/B signal voltage) to the corresponding row pixel units after processing, so as to implement the charging process of the row pixel units.

In this process, the driving system controls each single frame of the display screen 50 to display the content of the odd-numbered line pixel units or the even-numbered line pixel units, thereby achieving the purpose of frequency multiplication, improving the problem of jaggy feeling of the static frame, and optimizing the display effect of the display screen 50.

In some embodiments, the row driver module 30 is specifically configured to: outputting a first line scanning signal according to a first line control signal in a first frame display period, and sequentially starting each first line pixel unit line by line; and in the second frame display period, outputting a second line scanning signal according to the second line control signal, and sequentially starting each second line pixel unit line by line. The column driving module 40 is specifically configured to: when the first row of pixel units are started, outputting a first data voltage according to a first column control signal to charge the corresponding first row of pixel units; and when the second row of pixel units are started, outputting a second data voltage according to a second column control signal to charge the corresponding second row of pixel units. That is, in this embodiment, when the row driving module 30 and the column driving module 40 drive the display screen 50 to display, the corresponding first row pixel units or the second row pixel units are controlled to write corresponding data voltages row by row, so as to realize the display of a single frame picture.

As one embodiment, the first row control signal includes a first row clock signal and a first row synchronization signal, and the second row control signal includes a second row clock signal and a second row synchronization signal; the first column control signal includes a first column clock signal and a first field sync signal, and the second column control signal includes a second column clock signal and a second field sync signal.

The embodiment of the application also provides a display device, which comprises a display screen and the driving system of the display screen, wherein the driving system drives the display screen to realize picture display, and the driving system drives the content of the pixel units in the odd lines or the pixel units in the even lines in the display screen when each single frame picture is displayed, so that frequency multiplication is realized, and meanwhile, the saw tooth feeling of a static picture can be improved, and the picture display of the display screen is optimized. Since the driving system is described in detail above, it will not be described in detail here.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The driving method of the display screen provided by the embodiment of the application is described in detail, and specific examples are applied to illustrate the principle and implementation of the application, and the description of the above embodiment is only used for helping to understand the technical scheme and core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A driving method of a display screen, wherein the display screen includes a plurality of row pixel units arranged in columns, the driving method comprising:

dividing a plurality of row pixel units into a first part of pixels and a second part of pixels, taking each row pixel unit in the first part of pixels as a first row pixel unit, taking each row pixel unit in the second part of pixels as a second row pixel unit, and spacing at least one second row pixel unit between every two adjacent first row pixel units;

acquiring image data to be displayed, and acquiring first image data corresponding to the first part of pixels and second image data corresponding to the second part of pixels according to the image data to be displayed;

charging the first part of pixels according to the first image data in a first frame display period, so that the display screen displays an image picture corresponding to the first image data; charging the second part of pixels according to the second image data in a second frame display period, so that the display screen displays an image picture corresponding to the second image data; the first frame display period and the second frame display period are adjacent two frame display periods.

2. The method for driving a display screen according to claim 1, wherein the acquiring the first image data corresponding to the first portion of pixels and the second image data corresponding to the second portion of pixels according to the image data to be displayed includes:

dividing the image data to be displayed into odd frame image data and even frame image data;

and acquiring first image data corresponding to the first part of pixels in the odd-numbered frame image data, and acquiring second image data corresponding to the second part of pixels in the even-numbered frame image data.

3. The method of driving a display screen according to claim 1, wherein charging the first portion of pixels in a first frame display period according to the first image data includes:

generating a first data voltage and a first row control signal according to the first image data;

and starting the first row of pixel units row by row in the first frame display period according to a first row control signal, so that the first data voltage is written into the corresponding first row of pixel units.

4. The method of driving a display screen according to claim 1, wherein the charging the second portion of pixels in a second frame display period according to the second image data includes:

generating a second data voltage and a second line scan signal according to the second image data;

and turning on the second row of pixel units line by line in sequence in the second frame display period according to a second row scanning signal, so that the second data voltage is written into the corresponding second row of pixel units.

5. The method of any one of claims 1-4, wherein the first row of pixel cells is an odd row of pixel cells and the second row of pixel cells is an even row of pixel cells.

6. A driving system of a display screen, wherein the display screen comprises a plurality of row pixel units arranged in columns, and a plurality of the row pixel units form a first part of pixels and a second part of pixels; each row of pixel units in the first part of pixels are first row of pixel units, each row of pixel units in the second part of pixels are second row of pixel units, and at least one second row of pixel units are spaced between every two adjacent first row of pixel units; the drive system includes:

the main control module comprises a data acquisition unit, a first storage unit and a second storage unit; the first storage unit is used for storing first image data corresponding to the first part of pixels, and the second storage unit is used for storing second image data corresponding to the second part of pixels; the data acquisition unit is used for reading the first image data or the second image data;

the time sequence control module is connected with the data acquisition unit and is used for outputting a first row control signal and a first column control signal according to the first image data in a first frame display period and outputting a second row control signal and a second column control signal according to the second image data in a second frame display period; the first frame display period and the second frame display period are adjacent two display periods;

the row driving module is respectively connected with the time sequence control module, the first part of pixels and the second part of pixels, and is used for outputting a first row scanning signal according to a first row control signal to control the first part of pixels to be opened and outputting a second row scanning signal according to the second row control signal to control the second part of pixels to be opened;

the column driving module is connected with the time sequence control module, the first part of pixels and the second part of pixels, and is used for outputting a first data voltage to charge the first part of pixels according to the first column control signal and outputting a second data voltage to charge the second part of pixels according to the second column control signal.

7. The display screen driving system according to claim 6, wherein the row driving module is specifically configured to:

outputting the first line scanning signals according to the first line control signals in a first frame display period, and sequentially starting each first line of pixel units line by line;

and in a second frame display period, outputting the second line scanning signals according to the second line control signals, and sequentially starting each second line of pixel units line by line.

8. The display screen driving system according to claim 7, wherein the column driving module is specifically configured to:

outputting the first data voltage to charge the pixel units corresponding to the first row according to the first column control signal when the pixel units of the first row are started;

and outputting the second data voltage to charge the pixel units corresponding to the second row according to the second column control signal when the pixel units of the second row are started.

9. The drive system of any one of claims 6 to 8, wherein the first row control signal includes a first row clock signal and a first row synchronization signal, and the second row control signal includes a second row clock signal and a second row synchronization signal; the first column control signal includes a first column clock signal and a first field sync signal, and the second column control signal includes a second column clock signal and a second field sync signal.

10. A display device, comprising:

a display screen;

a drive system for a display screen according to any of claims 6-9, the drive system being connected to the display screen, the drive system being arranged to provide a data voltage for the display screen.