TWI404035B - Display driving circuit having image status memory characteristics and method thereof - Google Patents

Abstract

The invention provides a display driving circuit having image status memory characteristics and a driving method thereof. The driving method provided by the display driving chip can be implemented to drive a plurality of the pixels of the display to display an image status as desired by, for instance, a first level voltage output unit of a four-to-two voltage selector and a plurality of second level voltage output units of a two-to-one voltage selector. Compared to the single level processing of conventional three-to-one voltage selectors, the invention provides two levels of processing for improving on the drawbacks of prior techniques which require individual control of each pixel and thus occupy more voltage lines and input circuits, thereby significantly reducing the design complexity and manufacturing costs.

Description

Display driving circuit and method with image state memory characteristic

The present invention relates to a display driving circuit and method having image state memory characteristics, and more particularly to selecting a corresponding driving voltage for a plurality of selection signals generated by a driving chip of a display having image state memory characteristics. A display drive circuit and method for driving a display.

In recent years, research on display technology and life applications of soft electronics has been actively carried out, and the future development direction and field are still expanding. Soft electronics refers to the technology and application of fabricating microelectronic components on flexible, flexible or flexible substrates. The application advantages include convenient wear, soft and secure, flexible on the object and high in portability. formula.

Electronic paper (ePaper) is an application of soft electronics, which refers to a soft electronic device that looks like a thin paper, has a bistable characteristic, and must apply a voltage only when an image is changed via a driving circuit, and The application of voltage is stopped during the steady state of the image without changing the image, so that the electronic paper can continue to operate for a long time under limited power.

At present, among all the developed electronic paper display materials, electrophoretic display materials are most favored. The electrophoretic display material is mainly composed of white charged particles (TiO ₂ ), a colored viscous medium (including colored charged particles), and an indium tin oxide electrode (ITO electrode), which is colored by viscous voltage applied to the ITO electrode. An electric field is generated between the mediums, and thereby the charged molecules are moved to achieve the effect of switching the picture. The electrophoretic display material selects a colored viscous medium having a high viscosity coefficient, so that the charged particles are not easily moved during the period when the ITO is not applied with a voltage, thereby maintaining the characteristics of the original display screen when the power is off.

As shown in FIG. 1A, the architecture of a conventional electrophoretic display is shown, wherein the bus bars (or wires) 13 and 15 electrically connected to the TFT array 3 are respectively used for output source driving voltage. Each row of the thin film transistor array 3 and the output gate drive voltage level are positioned to each row of the thin film transistor array 3. Since the electronic paper has at least three display states of displaying color, displaying white, and maintaining the same, when the electrophoretic display material is to be used to achieve the display effect, the electrophoretic display source driving wafer 1 must be capable of generating at least three different types for each row. Drive voltage level (Tri-state voltage), such as V+, 0 or V-, and the gate drive wafer 2 controls the thin film transistor array by generating a High/Low voltage level. 3 want to open / close the column (row). Once the source driving chip 1 generates a driving voltage level for each row, all the pixels 10 on the column controlled by the gate driving wafer 2 can write the three-state driving voltage level to drive the pixels. 10 enables it to present the three display states desired.

As shown in FIG. 1B, the drive circuit 11 in the current common electrophoretic display source drive wafer 1 is shown. The driving mode of the conventional driving circuit 11 for realizing the three-state voltage is to generate a selection signal sel corresponding to each row of the TFT array 3, and then pass through a voltage selector 12 Selecting a driving voltage level to be output to each column of the thin film transistor array 3 according to the selection signals sel generated by the source driving chip 1, and transmitting the voltage output terminals 130 of each of the voltage selectors 12 (both The collection is integrated into the bus bar 13) and output to the corresponding row in the thin film transistor array 3.

The method for selecting the driving voltage level to be outputted to each row of the thin film transistor array 3 in the source driving wafer 1 of the electrophoretic display source is used in a plurality of three-to-one voltages. The selector 12 selects one driving voltage level from three driving voltage levels (V+, 0, and V-) according to the two selection signals sel generated by the source driving chip 1 of the electrophoretic display, and outputs the same through the bus 13 Corresponding lines in the electrophoretic display, as shown in FIG. 1A, with the gates controlled by the gate driving wafer 2, the corresponding plurality of pixels 10 on the electrophoretic display can be rendered in a desired display state, and wherein The number of the three-to-one voltage selectors 12 is equivalent to the number of rows of the thin film transistor array to be driven by the source driving wafer 1 of the electrophoretic display.

In summary, the number of three-to-one voltage selectors 12 required for the driving circuit of the conventional electrophoretic display source driving chip is equivalent to the number of rows of the thin film transistor array to be driven by the source driving chip of the electrophoretic display ( Column number), since each of the three-to-one voltage selectors 12 needs to select two driving voltage levels (for example, V+, 0, or V-) to be output by using two select lines, when the number of rows of the thin film transistor array is In addition, the driving circuit of the electrophoretic display source driving the chip will occupy more hardware resources and increase the process cost and design complexity. Therefore, how to simplify the current display source driving circuit with image state memory characteristics such as an electrophoretic display to reduce the process cost is a problem that needs to be solved at present.

In view of the above disadvantages of the prior art, an object of the present invention is to provide a display driving circuit and method having image state memory characteristics, so as to improve the problem that the display driving voltage output architecture having the image state memory characteristic requires more hardware resources. The process cost of the display driving chip with image state memory characteristics can be further reduced.

To achieve the above and other objects, the present invention provides a display driving circuit and method having image state memory characteristics. The display driving circuit of the present invention is configured to drive a plurality of pixels of the display to display a desired display state according to a driving manner provided by the display driving chip, the display driving circuit comprising: a first-stage voltage output unit having Inputting at least one first stage selection signal input end of the at least one first stage selection signal to be fed by the display driving chip, and inputting at least one first level of the at least one driving voltage level to be fed by the display driving chip Driving a voltage level input terminal and at least one first-level driving voltage level output terminal for outputting the at least one driving voltage level, and causing the at least one first-level driving voltage level output terminal to select according to the first level And outputting a signal output to the driving voltage level of the at least one first-level driving voltage level input terminal; and a plurality of second-level voltage output units respectively having at least one input for inputting the display driving chip to be fed a second stage selection signal terminal of the second stage selection signal is electrically connected to the first stage driving voltage level output end to receive the same And outputting at least one second-stage driving voltage level input terminal and at least one second-level driving voltage level output terminal of the driving voltage level, so that at least one second of each of the plurality of second-level voltage output units The stage driving voltage level output ends are respectively output according to the driving voltage level of the second stage selection signal output input to the at least one second stage driving voltage level input end, so as to make each of the second level driving voltage levels The output terminal outputs the driving voltage level to the corresponding pixel.

The display driving method with image state memory characteristic of the present invention is used for driving a driving mode provided by a display driving chip to drive a plurality of pixels of the display to exhibit a desired display state, the method comprising the steps of: setting a first level voltage The output unit sets the number of the first stage selection signal input ends of the first stage voltage output unit according to the change amount of the first stage driving voltage level to be fed by the display driving chip, and according to the first stage driving to be outputted The number of changes in the voltage level is set to the number of the first stage driving voltage level output terminals of the first stage voltage output unit, and the first stage selection signal is to be fed to the first stage selection signal input end according to the display driving chip. The first stage driving voltage level output end outputs a first stage driving voltage level to be outputted; and, the plurality of second stage voltage output units are set according to the number of the first stage driving voltage level output ends. The amount of change of the second-stage driving voltage level to be fed by the second-stage voltage output unit, and according to the second-level The number of changes of the dynamic voltage level is set to the number of the second stage selection signal input ends of the second stage voltage output unit, and each of the second stage voltage output units is set according to the amount of change of the second stage driving voltage level to be outputted. The second stage driving voltage level output end is output, and the second stage driving voltage level output end outputs the desire according to the second stage selection signal of the display driving chip to be fed to the second stage selection signal input end The output of the second stage of the driving voltage is leveled to the corresponding pixel.

Therefore, the display driving circuit and method having the image state memory characteristic of the present invention has image state memory of the present invention compared to the single-stage processing of the three-to-one voltage selector of the display driving technology having the image state memory characteristic. The characteristic display driving circuit and method can have advantages in design complexity and wafer area cost by a two-stage processing architecture such as a four-to-two voltage selector and a two-to-one voltage selector, and the image state memory is provided. The characteristic display driver chip requires that the selection signal generated for each pixel on the display having the image state memory characteristic can be reduced from two to one, which can effectively reduce the hardware resources or the chip area required by the voltage selector. Therefore, the display driving circuit and method of the present invention can further improve the design efficiency and cost effectiveness of a display driving chip having image state memory characteristics such as an electrophoretic display, a cholesteric liquid crystal display or a liquid toner display.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily appreciate other advantages and functions of the present invention from the disclosure herein. The present invention may be embodied or applied in various other specific embodiments, and various modifications and changes may be made without departing from the spirit and scope of the invention.

The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

It is particularly noted that the display driving circuit and method having the image state memory characteristic of the present invention can be used to drive a plurality of gate lines of a display having image state memory characteristics according to a driving mode provided by a display gate driving chip ( Gate-line, such that a plurality of driving thin film transistors are turned on or off (ON/OFF); further, another embodiment of the display driving circuit and method having image state memory characteristics of the present invention The plurality of source-lines of the display having the image state memory characteristic can be driven according to the driving mode provided by the display source driving chip, so that the corresponding plurality of pixels (pixel) exhibit the desired display. status.

As shown in FIG. 2, it is a block diagram showing the architecture of the display driving circuit 100 having the image state memory characteristic of the present invention. As shown in the figure, the display driving circuit 100 having the image state memory characteristic of the embodiment is configured to drive a plurality of pixels of the display to display a desired display state according to a driving manner provided by the display driving chip, which is required to be described herein. The display with the image state memory characteristic of the present invention is, for example, an electrophoretic display, a cholesteric liquid crystal display or a liquid powder display. The display driving circuit 100 has a first-stage voltage output unit 101 and a plurality of second-stage voltage output units 102. The number of the plurality of second-stage voltage output units 102 is equivalent to the number of rows/columns of the pixel array of the display to be driven by the display driving chip. As shown, the first stage voltage output unit 101 has a first stage selection signal input terminal S1 for inputting x first stage selection signals, and a first stage driving voltage level for inputting N driving voltage levels. a bit input terminal VI1 and a first stage driving voltage level output terminal VO1 for outputting the P driving voltage levels, so that the first stage driving voltage level output terminal VO1 is selected according to the x first stage selection signals The driving voltage level input to the first-stage driving voltage level input terminal VI1 is selected and output to the second-stage voltage output unit 102.

Each of the plurality of second-stage voltage output units 102 has a second-stage selection signal input terminal S2 for inputting y second-stage selection signals, and is electrically connected to the first-stage driving voltage level output terminal. The VO1 receives the second-level driving voltage level input terminal VI2 and the R second-level driving voltage level output terminals VO2 of the driving voltage level, and the plurality of second-stage voltage output units 102 The second driving voltage level output terminal VO2 is selected according to the y second stage selection signals to be output to the driving voltage level input in the second level driving voltage level input terminal VI2, so as to make each The secondary driving voltage level output terminal VO2 outputs the driving voltage level to the corresponding pixel.

It should be noted that the first stage selection signal and the second stage selection signal are derived from the selection signal fed by the display driving chip, and the driving voltage level is also fed from the display driving chip. The driving voltage level is the same, and the number of the second-stage voltage output units 102 of the display driving circuit 100 of the present embodiment is equivalent to the number of rows/columns of the pixel array of the display to be driven by the display driving chip.

Furthermore, the first-stage voltage output unit 101 and the second-stage voltage output unit 102 disclosed in the display driving circuit with image state memory characteristics of the present embodiment generally refer to a plurality of different voltage standards according to a given selection signal. A circuit or component that selects a corresponding output voltage level (or signal) between bits (or signals), such as a digital-to-analog converter (DAC), a multiplexer, a selector, or an analog/digital logic circuit that achieves similar functions. . For example, if the second stage voltage output unit 102 is a two-to-one voltage selector, it selects a voltage level between two input voltage levels (or signals) according to a given one of the selection signals (or Signal) as the output of the two-to-one voltage selector. Similarly, if the first-stage voltage output unit 101 is a three-to-one voltage selector, it selects a voltage level (or signal) between the three input voltage levels (or signals) as the three-to-one. The output of the voltage selector, so the three-to-one voltage selector requires at least two selection signals to provide sufficient state determination. In other words, two bits can determine four states, and one bit can only determine two states.

Therefore, the first-stage voltage output unit 101 inputs N signals to the first-stage driving voltage level input terminal VI1 according to the x first-stage selection signals input to the first-stage selection signal input terminal S1. Selecting P driving voltage levels corresponding to the x first-stage selection signals in the voltage level, and outputting the selected P driving voltage levels to each through the first-stage driving voltage level output terminal VO1 The plurality of second stage voltage output units 102.

Similarly, the plurality of second-stage voltage output units 102 are respectively input to the second-stage driving voltage level input terminal VI2 according to the y second-stage selection signals input to the second-stage selection signal input terminal S2. Selecting R driving voltage levels corresponding to the y second-stage selection signals among the P driving voltage levels, and respectively selecting the R driving voltages through the second-level driving voltage level output terminal VO2 The bits are output to corresponding pixels in the pixel array (or TFT array) of the display to be driven such that the plurality of pixels of the display assume the desired display state.

Therefore, the first-stage voltage output unit 101 of the display driving circuit 100 of the present invention sets the first-level voltage output unit 101 according to the change amount of the first-level driving voltage level that the display driving chip is to feed. The number of the first-stage selection signal input terminal S1, for example, the number of changes of the first-stage driving voltage level is three variations of V+, 0, and V-, so the number of the first-stage selection signal input terminal S1 is 3, in other words, The number of times of 2 is used as the number of changes of the first-stage driving voltage level, and the so-called number of times is used as the number of the first-stage selection signal input terminal S1; further, according to the first-stage driving voltage to be outputted The number of changes in the level sets the number of the first-stage driving voltage level output terminals VO1 of the first-stage voltage output unit 101, and the first one of the driving chips to be fed to the first-stage selection signal input terminal S1 according to the display driving chip The stage selection signal causes the first stage driving voltage level output terminal VO1 to output the first stage driving voltage level to be output.

As for the plurality of second-stage voltage output units 102 of the display driving circuit 100, the second-stage driving that each of the second-stage voltage output units 102 is to feed is set according to the number of the first-level driving voltage level output terminals VO1. The number of changes in the voltage level, that is, the number of the first-stage driving voltage level output terminal VO1 is the same as the number of the second-stage driving voltage level input terminal VI2, and according to the change of the second-level driving voltage level The number of the second stage selection signal input terminals S2 of each of the second stage voltage output units 102 is set, and the number of the second stage voltage output units 102 is set according to the number of changes of the second stage driving voltage levels to be outputted. The number of the second-level driving voltage level output terminal VO2, because the second-stage driving voltage level output terminal VO2 outputs the selected driving voltage level to the corresponding pixel in the pixel array of the display to be driven, The number of second stage driving voltage level output terminals VO2 is usually one. As shown in FIG. 3, a block diagram showing an embodiment of a display driving circuit 200 having image state memory characteristics of the present invention is shown. As shown, the display driving circuit 200 having the image state memory characteristic of the present embodiment has a first-stage voltage output unit 101' and a plurality of second-stage voltage output units 102'. It should be noted that, in order to simplify the description and the drawings, the second-stage voltage output unit 102' of the present embodiment is illustrated by three examples, but is not limited thereto. Since each pixel of the display having the image state memory characteristic needs to be capable of exhibiting at least three different display states (displaying color, displaying white, and remaining unchanged), the display driving chip for driving the display having the image state memory characteristic must be able to At least three different driving voltage levels (or signals) are output for each pixel of the display having the image state memory characteristic, and the present embodiment outputs four different driving voltage levels of V+, 0, Vcom, and V-. As an example.

As shown, the first stage voltage output unit 101' has a first stage selection signal input terminal S1' for inputting two first stage selection signals for inputting four driving voltage levels (ie, V+, 0). The first stage driving voltage level input terminal VI1' of the four different driving voltage levels of Vcom and V-) and the first stage driving voltage level output terminal VO1' for outputting two driving voltage levels The first stage driving voltage level output terminal VO1' selects two driving voltage levels from the four driving voltage levels according to the two first level selection signals to output to the second level voltage output. Unit 102'. As can be seen, the first-stage voltage output unit 101' of this embodiment is a four-to-two voltage selector, that is, at least two selection signals are needed to provide sufficient state determination (ie, two bits can determine four states). One bit can only determine two states). In addition, each of the plurality of second-stage voltage output units 102 ′ has a second-stage selection signal input terminal S2 ′ for inputting one second-stage selection signal, and is electrically connected to the first-level driving voltage. a second-stage driving voltage level input terminal VI2' of the level output terminal VO1' and a second-stage driving voltage level output terminal VO2' for outputting a driving voltage level capable of controlling the pixel changing state, so that each The second stage driving voltage level output terminal VO2' of the plurality of second stage voltage output units 102' is respectively selected according to the one second stage selection signal to be input to the two second stage driving voltage level input terminals. A driving voltage level of VI2' is output, and the second-level voltage level output terminal VO2' outputs the selected driving voltage level to a corresponding pixel in the pixel array of the display to be driven.

It should be noted that the display driving circuit and method having the image state memory characteristic of the present invention is not limited to the driving voltage level to be fed by the display driving chip described in the embodiment shown in FIG. Four different driving voltage levels of 0, Vcom, and V-, the first-stage voltage output unit 101' is a four-to-two voltage selector, and the second-stage voltage output unit 102' is a two-to-one voltage selector. In another embodiment of the present invention, the display driving circuit of the present invention has a driving voltage level that can be fed by the display driving chip, and can be three different driving voltage levels of V+, 0, and V-. The first stage voltage output unit 101' is a three-to-two voltage selector and the second stage voltage output unit 102' is a two-to-one voltage selector.

As can be seen from the above, the display driving circuit and method having the image state memory characteristic of the present invention provides a two-stage processing architecture, as shown in FIG. 3, compared to the conventional three-to-one voltage selector. By using a first-stage voltage output unit such as a four-to-two voltage selector and a plurality of second-stage voltage output units such as a two-to-one voltage selector, thereby improving the prior art by using a plurality of three-to-one voltage selections The device respectively controls the plurality of pixels and occupies more voltage selection lines and the driving voltage level input lines. Therefore, the display driving circuit and method with the image state memory characteristic of the present invention can greatly reduce the existing image state memory. The design of the characteristic display driver circuit has a complicated circuit design structure, and further reduces the number of required signal lines and driving voltage level input lines. Therefore, compared with the conventional display driving technology with image state memory characteristics, Single-stage processing of three-to-one voltage selector, the invention has the image state memory characteristic The driver driving circuit and method can have advantages in design complexity and wafer area cost by a two-stage processing architecture such as a four-to-two voltage selector and a two-to-one voltage selector, and the image state memory characteristic The selection signal generated by the display driver chip for each pixel on the electrophoretic display can be reduced from two to one, and the design efficiency and performance of the display driver chip having the overall image state memory characteristic are significantly improved.

In summary, the display driving circuit and method of the present invention can greatly reduce the design complexity and production cost of the existing display driving chip with image state memory characteristics, and moderately improve the performance of the wafer itself. More importantly, with the increase in the size or resolution of the display with image state memory characteristics in the future, the display drive circuit with image state memory characteristics of the present invention can have more display drive technology than the image display memory feature previously. Significant advantage.

The above-described embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the claims described below.

1. . . Electric 咏 display source drive chip

10. . . Pixel

100. . . Display driver circuit

101,101’. . . First stage voltage output unit

102,102’. . . Second stage voltage output unit

11. . . Drive circuit

12. . . Voltage selector

13,15. . . Busbar

130. . . Voltage output

2. . . Gate driver chip

200. . . Display driver circuit

3. . . Thin film transistor array

VI1, VI1’. . . First stage drive voltage level input

VI2, VI2’. . . Second stage driving voltage level input

VO1, VO1’. . . First stage drive voltage level output

VO2, VO2’. . . Second stage drive voltage level output

S1, S1’. . . First stage selection signal input

S2, S2’. . . Second stage selection signal input

Sel. . . Selection signal

Figure 1A is a block diagram showing the basic structure of a conventional electrophoretic display;

FIG. 1B is a block diagram showing the basic architecture of a display source driving circuit of a conventional electrophoretic display;

2 is a block diagram showing the basic architecture of a display driving circuit with image state memory characteristics of the present invention;

FIG. 3 is a block diagram showing the basic architecture of a specific embodiment of a display driving circuit having image state memory characteristics according to the present invention.

100. . . Display driver circuit

101. . . First stage voltage output unit

102. . . Second stage voltage output unit

VI1. . . First stage drive voltage level input

VI2. . . Second stage driving voltage level input

VO1. . . First stage drive voltage level output

VO2. . . Second stage drive voltage level output

S1. . . First stage selection signal input

S2. . . Second stage selection signal input

Claims (18)

A display driving circuit with image state memory characteristics for driving a plurality of pixels of a display having image state memory characteristics to display a desired display state according to a driving mode provided by a display driving chip, the display driving circuit comprising: a first stage voltage output unit having at least one first stage selection signal input terminal for inputting at least one first stage selection signal to be fed by the display driving chip, for inputting at least one of the display driving chips to be fed At least one first stage driving voltage level input end of the driving voltage level and at least one first stage driving voltage level output end for outputting the at least one driving voltage level, the at least one first stage driving is ordered The voltage level output terminal outputs a driving voltage level input to the at least one first stage driving voltage level input end according to the first stage selection signal; and a plurality of second level voltage output units respectively for inputting The display drives a second stage selection signal terminal of the at least one second stage selection signal to be fed by the chip, and is electrically connected to The first stage driving voltage level output end receives at least one second-level driving voltage level input end and the at least one second-level driving voltage level output end of the driving voltage level output thereof, so that each of the plurality The at least one second-stage driving voltage level output end of the second-stage voltage output unit outputs a driving voltage level input to the at least one second-level driving voltage level input end according to the second-stage selection signal, respectively. So that each of the second-level driving voltage level output terminals outputs the driving voltage level to the corresponding pixel. A display driving circuit having image state memory characteristics according to claim 1, wherein the first-stage voltage output unit and the second-stage voltage output unit are digital-to-analog converters (DACs), multiplexers, or selectors. For example, the display driving circuit with the image state memory characteristic of the first aspect of the patent application, wherein the driving driving chip is required to feed the driving voltage levels of four different driving voltage levels of V+, 0, Vcom and V-. The number of the first stage driving voltage level input terminals of the first stage voltage output unit is four, and the number of the first stage selection signal input ends of the first stage voltage output unit is two, the first stage voltage output The number of the first stage driving voltage level output terminals of the unit is two, the second stage driving voltage level level input end of the second stage voltage output unit is two, and the second stage of the second stage voltage output unit is selected The number of signal input terminals is one, and the number of the first-stage driving voltage level output terminals of the second-stage voltage output unit is one. A display driving circuit having image state memory characteristics according to claim 3, wherein the first-stage voltage output unit is a four-to-two voltage selector, and the second-stage voltage output unit is a two-to-one voltage Selector. The display driving circuit having the image state memory characteristic according to the first aspect of the patent application, wherein when the driving driving voltage of the display driving chip is to be three different driving voltage levels of V+, 0, and V-, The number of the first stage driving voltage level input terminals of the first stage voltage output unit is three, and the first stage of the first stage voltage output unit is selected The number of selection signal input terminals is two, the number of the first stage driving voltage level output terminals of the first stage voltage output unit is two, and the number of the second stage driving voltage level input ends of the second stage voltage output unit is The number of the second stage selection signal input ends of the second stage voltage output unit is one, and the number of the first stage driving voltage level output ends of the second stage voltage output unit is one. A display driving circuit having image state memory characteristics according to claim 5, wherein the first-stage voltage output unit is a three-to-two voltage selector, and the second-stage voltage output unit is a two-to-one voltage Selector. A display driving circuit having image state memory characteristics according to claim 1 of the patent application, wherein the display is a display having image state memory characteristics. The display driving circuit with image state memory characteristics according to claim 7 of the patent application, wherein the display having the image state memory characteristic is an electrophoretic display, a cholesteric liquid crystal display or a liquid powder display. A display driving circuit having image state memory characteristics according to claim 1, wherein the display driving chip is a display source driving chip or a display gate driving chip. A display driving method with image state memory characteristics for driving a driving mode provided by a display driving chip to drive a plurality of pixels of a display having image state memory characteristics to display a desired display state, the method comprising the steps of: setting The first stage voltage output unit is driven by the display The number of changes of the first stage driving voltage level to be fed by the chip sets the number of the first stage selection signal input ends of the first stage voltage output unit, and is set according to the number of changes of the first stage driving voltage level to be outputted. The number of the first stage driving voltage level output terminals of the first stage voltage output unit, and the first stage driving voltage level is determined according to the first stage selection signal of the display driving chip to be fed to the first stage selection signal input end The output terminal outputs the first-level driving voltage level to be output; and sets a plurality of second-level voltage output units, and the second-level voltage output unit is set to be fed according to the number of the first-level driving voltage level output terminals. The number of changes of the second stage driving voltage level, and the number of the second stage selection signal input ends of each of the second stage voltage output units is set according to the number of changes of the second stage driving voltage level, and according to the The number of changes of the secondary driving voltage level sets the number of the second-stage driving voltage level output ends of the second-stage voltage output units, and according to the display Moving the wafer to be fed to the second stage of the second stage selection signal of the respective signal input terminal of the second stage driving the output voltage level of the output terminal of the second stage the level of the driving voltage to be output to the corresponding pixel. A display driving method with image state memory characteristics according to claim 10, wherein the first-stage voltage output unit and the second-stage voltage output unit are digital-to-analog converters (DACs), multiplexers, or selectors. Such as the application of the patent scope of item 10 has the image state memory characteristics The first driving method of the first stage voltage output unit when the driving driving voltage level of the display driving chip is four different driving voltage levels of V+, 0, Vcom and V- The number of driving voltage level input terminals is four, the number of the first stage selection signal input ends of the first stage voltage output unit is two, and the number of the first stage driving voltage level output ends of the first stage voltage output unit is Two, the second-stage voltage output unit has a second-stage driving voltage level input end number of two, and the second-stage voltage output unit has a second-stage selection signal input end number of one, the second-stage voltage output The number of the first stage driving voltage level output terminals of the unit is one. The display driving method of the image state memory characteristic of claim 12, wherein the first-stage voltage output unit is a four-to-two voltage selector, and the second-stage voltage output unit is a two-to-one voltage Selector. A display driving method with image state memory characteristics according to claim 10, wherein when the display driving chip is to feed a driving voltage level of three different driving voltage levels of V+, 0, and V-, The number of the first stage driving voltage level input terminals of the first stage voltage output unit is three, and the number of the first stage selection signal input ends of the first stage voltage output unit is two, and the first stage voltage output unit is the first The number of the first-level driving voltage level output terminals is two, the second-stage voltage output unit has the second-stage driving voltage level input end number, and the second-stage voltage output unit has the second-stage selection signal input end. The number is one, the first stage of the second stage voltage output unit drives The number of output terminals is one. The display driving method of the image state memory characteristic of claim 14, wherein the first-stage voltage output unit is a three-to-two voltage selector, and the second-stage voltage output unit is a two-to-one voltage Selector. A display driving method with image state memory characteristics according to claim 10, wherein the display is a display having image state memory characteristics. The display driving method of claim 16, wherein the display having the image state memory characteristic is an electrophoretic display, a cholesteric liquid crystal display or a liquid powder display. A display driving method with image state memory characteristics according to claim 10, wherein the display driving chip is a display source driving chip or a display gate driving chip.