Cholesterol liquid crystal display and driving method thereof

Abstract

The invention provides a cholesterol liquid crystal display and a driving method thereof, and horizontal crosstalk can be reduced. The cholesterol liquid crystal display comprises a cholesterol liquid crystal panel and a controller. The cholesterol liquid crystal panel comprises a plurality of pixel units. In a picture updating period, the controller applies a plurality of data voltages arranged in a first polarity combination to the plurality of pixel units in a first scanning period. The first polarity combination has different polarities. In the first scanning period, the controller also applies a common-mode voltage with a direct-current voltage value to the plurality of pixel units.

Description

Technical Field

[0001] This invention relates to a bistable display, and more particularly to a cholesterol liquid crystal display and its driving method. Background Technology

[0002] Bistable displays can utilize bistable media. For example, electronic paper displays use electrophoretic particles. Cholesterol liquid crystal (CLC) displays use cholesterol liquid crystal.

[0003] Generally, cholesteric liquid crystal displays (LCDs) can drive the cholesteric liquid crystals to either a planar state or a focal-conic state. During the switching of these states, the LCD requires the application of a driving voltage and a common-mode voltage to the cholesteric liquid crystal pixels to create a large voltage difference (e.g., 40 volts), thereby updating the cholesteric liquid crystal alignment.

[0004] Specifically, a cholesteric liquid crystal display (LCD) may apply a driving voltage of a first polarity (e.g., a positive voltage) and a corresponding common-mode voltage to both ends of a cholesteric liquid crystal pixel. The LCD may also apply a driving voltage of another polarity (e.g., a negative voltage) and a corresponding common-mode voltage to both ends of the cholesteric liquid crystal pixel. However, due to the large voltage difference across the cholesteric liquid crystal pixel, one end of the cholesteric liquid crystal pixel (e.g., the end receiving the common-mode voltage) may be affected by charge coupling, causing horizontal crosstalk (Hcross-talk) to occur in the cholesteric liquid crystal display. Summary of the Invention

[0005] This invention provides a cholesterol liquid crystal display that can reduce horizontal crosstalk.

[0006] The cholesterol liquid crystal display of this invention includes a cholesterol liquid crystal panel and a controller. The cholesterol liquid crystal panel includes a plurality of pixel units. The controller is coupled to the plurality of pixel units. During a screen update cycle, the controller is configured to apply a plurality of data voltages having a first polarity combination to the plurality of pixel units during a first scan period. The first polarity combination has different polarities. The controller is also configured to apply a common-mode voltage having a DC voltage value to the plurality of pixel units during the first scan period.

[0007] This invention also provides a driving method for a cholesterol liquid crystal display. The driving method includes the following steps: During a first scan period of a screen update cycle, a controller applies a plurality of data voltages arranged in a first polarity combination to a plurality of pixel units. The first polarity combination has different polarities. During the first scan period, the controller applies a common-mode voltage having a DC voltage value to the plurality of pixel units.

[0008] Based on the above, the cholesteric liquid crystal display and its driving method according to embodiments of the present invention, by applying multiple data voltages of different polarities to multiple pixel units during a single scan period, and in conjunction with a DC common-mode voltage, can reduce the impact of voltage drop at the end of these pixel units receiving the common-mode voltage. Thus, the cholesteric liquid crystal display can reduce the impact of charge coupling on multiple pixel units, thereby reducing horizontal crosstalk.

[0009] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a circuit block diagram of a cholesterol liquid crystal display according to an embodiment of the present invention.

[0011] Figure 2 This is a flowchart illustrating a driving method for a cholesterol liquid crystal display according to an embodiment of the present invention.

[0012] Figure 3 This is a circuit block diagram of a cholesterol liquid crystal display according to another embodiment of the present invention.

[0013] Figure 4 Based on the present invention Figure 3 A schematic diagram illustrating the operation of a cholesterol liquid crystal display as shown in the embodiment.

[0014] Figure 5 Based on the present invention Figure 3 Timing diagram of a cholesterol liquid crystal display illustrated in the embodiment.

[0015] Figures 6A to 6F Based on the present invention Figure 3 A schematic diagram illustrating the polarity reversal of the screen of a cholesterol liquid crystal display shown in the embodiment.

[0016] In the attached figures, the following labels are used:

[0017] 100, 300: Cholesterol LCD monitor

[0018] 110, 310: Controller

[0019] 120, 320: Cholesterol LCD Panel

[0020] 121: Pixel Matrix

[0021] 1211~12MN, 3211~32MN: Pixel unit

[0022] 321: Switching element

[0023] 322: Cholesterol Liquid Crystal Pixel

[0024] C1~CM, C1~C4: Columns

[0025] Cdc: Parasitic capacitor

[0026] R1~RN, R1~R4: row

[0027] S210~S220: Steps

[0028] S410: During reset

[0029] S420: Waiting period

[0030] S431: During the first swing phase

[0031] S432: During the second swing phase

[0032] S441: During the first scan

[0033] S442: During the second scan

[0034] S450: End of Period

[0035] U1~U2, U11~U12: Elements

[0036] V1~V2: Voltage values

[0037] Vcom: Common-mode voltage

[0038] Vdata, Vdata1~Vdata2: Data voltage

[0039] Vgate: Gate voltage

[0040] Vpixel: Pixel voltage Detailed Implementation

[0041] Some embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Component symbols used in the following description, when appearing in different drawings, are considered to be the same or similar components. These embodiments are only a part of the present invention and do not disclose all possible implementations of the invention. More precisely, these embodiments are merely examples within the scope of the present invention's patent application.

[0042] Figure 1This is a circuit block diagram of a cholesterol liquid crystal display according to an embodiment of the present invention. (Reference) Figure 1 The cholesteric liquid crystal display 100 utilizes the bistable properties of cholesteric liquid crystal molecules for display. The cholesteric liquid crystal display 100 includes a controller 110 and a cholesteric liquid crystal panel 120. The cholesteric liquid crystal panel 120 includes a plurality of pixel units 1211 to 12MN, where M and N are non-zero positive integers. Each pixel unit 1211 to 12MN includes cholesteric liquid crystal molecules. The plurality of pixel units 1211 to 12MN can be arranged in a matrix to form a pixel matrix 121. That is, the pixel matrix 121 includes a plurality of pixel units 1211 to 12MN arranged in multiple columns C1 to CM and multiple rows R1 to RN.

[0043] The controller 110 is coupled to multiple pixel units 1211-12MN. The controller 110 drives these pixel units 1211-12MN to display an image. The controller 110 may include, for example, a timing controller, a signal converter, a field programmable gate array (FPGA), a central processing unit (CPU), or other programmable general-purpose or special-purpose microprocessor, digital signal processor (DSP), programmable controller, application-specific integrated circuit (ASIC), programmable logic device (PLD), or other similar devices or combinations thereof, which can load and execute computer program firmware or software to realize control and various calculation functions.

[0044] Figure 2 This is a flowchart illustrating a driving method for a cholesterol-based liquid crystal display according to an embodiment of the present invention. (See reference) Figure 1 as well as Figure 2 The cholesterol liquid crystal display 100 executes steps S210 to S220 to implement the driving method. These steps S210 to S220 may, for example, be applied within the same screen update cycle. The screen update cycle may, for example, be the period used to update a single display screen.

[0045] In step S210, during the first scan period within the screen update cycle, the controller 110 applies a plurality of data voltages Vdata, arranged in a first polarity combination, to a plurality of pixel units 1211-12MN. The first scan period may, for example, be a period used to scan the cholesteric liquid crystal panel 120, so that the arrangement state of the plurality of pixel units 1211-12MN is switched to a target arrangement state (including planar arrangement and / or focal conical arrangement) based on the plurality of data voltages Vdata. The plurality of data voltages Vdata may, for example, be a plurality of pulse voltages and indicate the grayscale of the plurality of pixel units 1211-12MN.

[0046] During the first scan period, the controller 110 also applies multiple gate voltages (not shown) to multiple pixel units 1211-12MN. The multiple gate voltages may be, for example, other pulse voltages, and are used to select the multiple pixel units 1211-12MN to which multiple data voltages Vdata are written.

[0047] In step S220, during the first scan period, the controller 110 applies a common-mode voltage Vcom, which has a DC voltage value, to a plurality of pixel units 1211 to 12MN. The common-mode voltage Vcom is a DC voltage. Thus, based on multiple gate voltages, the plurality of pixel units 1211 to 12MN present a corresponding arrangement state according to multiple data voltages Vdata and the common-mode voltage Vcom, and display the corresponding color accordingly.

[0048] It should be noted that the first polarity combination has different polarities. That is, during the first scan period, some pixel units 1211-12MN receive a data voltage Vdata (e.g., a positive voltage) with the first polarity and a DC common-mode voltage Vcom. Another portion of pixel units 1211-12MN receive a data voltage Vdata (e.g., a negative voltage) with the second polarity and a DC common-mode voltage Vcom.

[0049] It is worth mentioning that the multiple pixel units 1211-12MN share a common first terminal that receives the same common-mode voltage Vcom, and have different multiple second terminals that receive multiple positive voltages and multiple negative voltages (i.e., multiple data voltages Vdata). Therefore, the first terminal is less susceptible to voltage drop between itself and the corresponding second terminal. In this way, the cholesteric liquid crystal display 100 can reduce the influence of charge coupling on the first terminals of the multiple pixel units 1211-12MN used to receive the common-mode voltage Vcom, thereby reducing horizontal crosstalk.

[0050] Figure 3 This is a circuit block diagram of a cholesterol liquid crystal display according to another embodiment of the present invention. (Reference) Figure 3The cholesterol liquid crystal display 300 includes a controller 310 and a cholesterol liquid crystal panel 320. The cholesterol liquid crystal panel 320 includes a plurality of pixel units 3211 to 32MN. The controller 310, the cholesterol liquid crystal panel 320, and the pixel units 3211 to 32MN can be deduced from the relevant description of the cholesterol liquid crystal display 100.

[0051] exist Figure 3 In the embodiments, the equivalent circuit of each pixel unit 3211 to 32MN can be illustrated using pixel unit 3211 as an example. Pixel unit 3211 includes a switching element 321 and a cholesteric liquid crystal pixel 322. The switching element 321 can be implemented, for example, as an n-type metal-oxide-semiconductor field-effect transistor (NMOSFET). The cholesteric liquid crystal pixel 322 includes cholesteric liquid crystal molecules and can be represented by an equivalent capacitor.

[0052] The control terminal (i.e., gate) of switching element 321 is coupled to controller 310 to receive the gate voltage Vgate. The first terminal (i.e., the first source / drain) of switching element 321 is coupled to controller 310 to receive one of a plurality of data voltages Vdata (i.e., data voltage Vdata1). The second terminal (i.e., the second source / drain) of switching element 321 is coupled to the first terminal of cholesteric liquid crystal pixel 322. The second terminal of cholesteric liquid crystal pixel 322 is coupled to controller 310 to receive the common-mode voltage Vcom.

[0053] When the switching element 321 is turned on based on the gate voltage Vgate, the switching element 321 provides a corresponding pixel voltage Vpixel to the first terminal of the cholesteric liquid crystal pixel 322 according to the data voltage Vdata1. The second terminal of the cholesteric liquid crystal pixel 322 receives the common-mode voltage Vcom. Thus, based on the voltage difference across the cholesteric liquid crystal pixel 322, the cholesteric liquid crystal molecules are oriented. Furthermore, based on the voltage difference, a parasitic capacitor Cdc can be formed between the terminal of the pixel unit 3211 that receives the data voltage Vdata1 and the terminal that receives the common-mode voltage Vcom. Through the driving method of this embodiment, the cholesteric liquid crystal display 300 can reduce the parasitic capacitor Cdc.

[0054] Please refer to the above. Figure 4 , Figure 4 Based on the present invention Figure 3 A schematic diagram illustrating the operation of a cholesterol-based liquid crystal display as shown in the embodiment. Figure 4In this example, the cholesterol liquid crystal display 300 illustrates the operation of various periods S410 to S450 within a single frame update cycle using a table. To prevent the cholesterol liquid crystal molecules from becoming rigid, the cholesterol liquid crystal display 300 can drive multiple pixel units 1211 to 12MN with multiple data voltages of opposite polarities during different periods S410 to S450, so that the multiple pixel units 1211 to 12MN rotate during the corresponding period.

[0055] Specifically, the screen update cycle sequentially includes multiple reset periods S410, waiting periods S420, first swing periods S431, first scan periods S441, second swing periods S432, second scan periods S442, and an end period S450. During these periods S410 to S450, the controller 310 can apply multiple gate voltages (including gate voltage Vgate) to multiple pixel units 3211 to 32MN to selectively turn on or off multiple pixel units 3211 to 32MN. Thus, these pixel units 3211 to 32MN can be adjusted according to... Figure 4 The data voltage Vdata and common-mode voltage Vcom are shown for operation.

[0056] During the first reset period of S410, the controller 310 applies multiple data voltages Vdata (e.g., positive voltages) of a first polarity to multiple first terminals of multiple pixel units 3211-32MN. The controller 310 also applies an alternating current common-mode voltage Vcom to multiple second terminals of the multiple pixel units 3211-32MN. Thus, based on a large voltage difference (e.g., 40V), the multiple pixel units 3211-32MN are reset to a homeotropic state.

[0057] Similarly, during the second reset period of S410, the controller 310 applies multiple data voltages Vdata (e.g., negative voltages) of a second polarity to multiple first terminals of multiple pixel units 3211-32MN. The controller 310 also applies an alternating current common-mode voltage Vcom to multiple second terminals of the multiple pixel units 3211-32MN. Thus, the pixel units 3211-32MN are rotated and assume a vertical state.

[0058] During the waiting period S420, the controller 310 applies multiple data voltages Vdata and a common-mode voltage Vcom, each having the same DC voltage value (e.g., 0V), to multiple pixel units 3211 to 32MN. Thus, during this period S420, the multiple pixel units 3211 to 32MN wait for the cholesterol liquid crystal molecules to complete their orientation.

[0059] During the first swing period S431, the controller 310 applies multiple data voltages Vdata having a DC voltage value (e.g., 0V) to multiple first terminals of multiple pixel units 3211-32MN. The controller 310 also applies a common-mode voltage Vcom having the same DC voltage value to multiple second terminals of the multiple pixel units 3211-32MN.

[0060] During the first scan period S441, the controller 310 applies multiple data voltages Vdata, arranged in a first polarity combination, to multiple first terminals of multiple pixel units 3211-32MN. The controller 310 also applies a common-mode voltage Vcom, having a DC voltage value (e.g., 0V), to multiple second terminals of the multiple pixel units 3211-32MN. Based on the multiple voltage differences, the multiple pixel units 3211-32MN are switched to a planar arrangement and / or a focal conical arrangement. Figure 4 As shown, the first polarity combination can be, for example, a frame inversion formed by alternating positive and negative polarities in columns.

[0061] During the second swing period S432, the controller 310 applies a data voltage Vdata having a DC voltage value (e.g., 0V) to a plurality of first terminals of the plurality of pixel units 3211 to 32MN. The controller 310 also applies a common-mode voltage Vcom having the same DC voltage value to a plurality of second terminals of the plurality of pixel units 3211 to 32MN.

[0062] During the second scan period S442, the controller 310 applies multiple data voltages Vdata, arranged in a second polarity combination, to multiple first terminals of multiple pixel units 3211-32MN. The controller 310 also applies a common-mode voltage Vcom, having a DC voltage value (e.g., 0V), to multiple second terminals of the multiple pixel units 3211-32MN. Similar to the first scan period S441, based on multiple voltage differences, the multiple pixel units 3211-32MN are oriented and exhibit a planar arrangement and / or a focal conical arrangement. The second polarity combination has a different polarity and is opposite to the first polarity combination. Figure 4 As shown, the second polarity combination arrangement can be, for example, a screen reversal formed by alternating positive and negative polarities in columns, and is the opposite of the first polarity combination.

[0063] It should be noted that the controller 310 provides multiple data voltages Vdata with different polarities (i.e., a first polarity combination) during a single scan period S441, and provides multiple data voltages Vdata with opposite polarities (i.e., a second polarity combination) during another scan period S442. That is, within the same frame update cycle, the controller 310 executes the first scan period S441 and then continues to execute the second swing period S432. Then, the controller 310 continues to execute the second scan period S442. In each scan period S441 and S442, the multiple data voltages Vdata simultaneously include both positive and negative voltages.

[0064] In other embodiments, the first sway period S431 and the second sway period S432 can be omitted within the same frame update cycle. That is, the controller 310 continues to execute the second scan period S442 after executing the first scan period S441.

[0065] During the end period S450, the controller 310 applies a data voltage Vdata (e.g., a positive voltage) of a first polarity to a plurality of first terminals of the plurality of pixel units 3211-32MN, and applies an alternating common-mode voltage Vcom to a plurality of second terminals of the plurality of pixel units 3211-32MN. Next, the controller 310 applies a data voltage Vdata (e.g., a negative voltage) of a second polarity to the plurality of first terminals of the plurality of pixel units 3211-32MN, and applies an alternating common-mode voltage Vcom to a plurality of second terminals of the plurality of pixel units 3211-32MN. Thus, similar to the multiple reset periods S410, the plurality of pixel units 3211-32MN are switched to a vertical state based on a large voltage difference.

[0066] Figure 5 Based on the present invention Figure 3 Timing diagram of a cholesterol liquid crystal display illustrated in the embodiment. (Reference) Figure 3 as well as Figure 5 The cholesterol liquid crystal display 300 may, for example, apply multiple data voltages Vdata1 to Vdata2 and a common-mode voltage Vcom to multiple pixel units 3211 to 3212 located in different rows to illustrate the operational details of the cholesterol liquid crystal display 300 during the first scan period S441, the second swing period S432, and the second scan period S442.

[0067] During the first scan period S441, the data voltage Vdata1 is a pulse voltage that switches between a positive first voltage value V1 and a negative first voltage value V1. The data voltage Vdata1 may, for example, be applied to a plurality of pixel units (including pixel unit 1311) located in odd-numbered rows. The data voltage Vdata2 is a pulse voltage that switches between a positive first voltage value V1 and a negative first voltage value V1, and may be the opposite of the data voltage Vdata1. The data voltage Vdata2 may, for example, be applied to a plurality of pixel units (including pixel unit 1312) located in even-numbered rows. Thus, the plurality of data voltages Vdata1 to Vdata2 have the following characteristics: Figure 4 The first polarity combination is shown during the first scan period S441. Furthermore, the common-mode voltage Vcom is a DC voltage having a second voltage value V2. The second voltage value V2 is less than the first voltage value V1, and may be, for example, 0V.

[0068] During the second swing period S432, the multiple data voltages Vdata1 to Vdata2 and the common-mode voltage Vcom are all DC voltages with a second voltage value V2.

[0069] During the second scan period S442, data voltage Vdata1 is the reverse of data voltage Vdata1 during the first scan period S441. Data voltage Vdata2 is the reverse of data voltage Vdata2 during the first scan period S441. Thus, the multiple data voltages Vdata1 to Vdata2 have the following characteristics: Figure 4 The second polarity combination is shown during the second scan period S442. The common-mode voltage Vcom is maintained as a DC voltage with a second voltage value V2.

[0070] Figures 6A to 6F Based on the present invention Figure 3 A schematic diagram illustrating the screen polarity reversal of a cholesterol-based liquid crystal display shown in the embodiment. (Reference) Figure 3 as well as Figures 6A to 6F During the first scan period S441, the cholesterol liquid crystal display 300 applies a plurality of data voltages Vdata arranged in a first polarity combination to a plurality of pixel units 3211 to 32MN. During the second scan period S442, the cholesterol liquid crystal display 300 also applies a plurality of data voltages Vdata arranged in a second polarity combination to the plurality of pixel units 3211 to 32MN.

[0071] like Figure 6AAs shown, the first polarity combination and the reversed second polarity combination can be, for example, a V-type screen reversal, i.e., column reversal. Specifically, during the first scan period S441, the first polarity combination includes a plurality of odd columns having a first polarity (e.g., positive) and a plurality of even columns having a second polarity (e.g., negative). The plurality of odd columns include column C1. The plurality of even columns include column C2. Column C1 is adjacent to column C2. During the second scan period S442, the second polarity combination is the reverse of the first polarity combination.

[0072] like Figure 6B As shown, similar to a V-type screen reversal, the first polarity combination includes multiple first columns with a first polarity (e.g., positive) and multiple second columns with a second polarity (e.g., negative). The multiple first columns are adjacent to each other and have m (e.g., 2) adjacent columns as column units of the first polarity, for example, columns C1 to C2. m is a positive integer greater than 1. The multiple second columns are also adjacent to each other and have m adjacent columns as column units of the second polarity, for example, columns C3 to C4. These first columns C1 to C2 are also adjacent to these second columns C3 to C4. The second polarity combination is the reverse of the first polarity combination.

[0073] like Figure 6C As shown, the first polarity combination and the reversed second polarity combination can be, for example, an H-type image inversion, i.e., a line inversion. Specifically, during the first scan period S441, the first polarity combination includes a plurality of odd-numbered rows having a first polarity (e.g., positive) and a plurality of even-numbered rows having a second polarity (e.g., negative). The plurality of odd-numbered rows includes row R1. The plurality of even-numbered rows includes row R2. Row R1 is adjacent to row R2. During the second scan period S442, the second polarity combination is the reverse of the first polarity combination.

[0074] like Figure 6D As shown, similar to an H-type screen reversal, the first polarity combination includes multiple first rows with a first polarity (e.g., positive) and multiple second rows with a second polarity (e.g., negative). The multiple first rows are adjacent to each other and have n (e.g., 2) adjacent rows as row units of the first polarity, for example, rows R1 to R2. n is a positive integer greater than 1. The multiple second rows are also adjacent to each other and have n adjacent rows as row units of the second polarity, for example, rows R3 to R4. These first rows R1 to R2 are also adjacent to these second rows R3 to R4. The second polarity combination is the reverse of the first polarity combination.

[0075] like Figure 6EAs shown, the first polarity combination and the inverse second polarity combination can be, for example, a dot-type image inversion. Specifically, during the first scan period S441, the first polarity combination includes a plurality of first elements having a first polarity (e.g., positive) and a plurality of second elements having a second polarity (e.g., negative). The plurality of first elements includes element U1, and each first element corresponds to a single pixel unit. The plurality of second elements includes element U2, and each second element corresponds to a single pixel unit. The plurality of first elements and the plurality of second elements are interleaved and arranged in a matrix. During the second scan period S442, the second polarity combination is the inverse of the first polarity combination.

[0076] like Figure 6F As shown, similar to a dot-type image inversion, the first polarity combination includes a plurality of first elements having a first polarity (e.g., positive) and a plurality of second elements having a second polarity (e.g., negative). Each first element includes a plurality of first sub-elements. For example, first element U11 includes k (e.g., 4) first sub-elements corresponding to a single pixel unit, where k is a positive integer greater than 1. The plurality of first sub-elements are adjacent to each other and have the same polarity. Each second element includes a plurality of second sub-elements. For example, second element U12 includes k (e.g., 4) second sub-elements corresponding to a single pixel unit. The plurality of second sub-elements are adjacent to each other and have the same polarity. The second polarity combination is the inverse of the first polarity combination.

[0077] In summary, the cholesteric liquid crystal display and its driving method of the present invention, by applying image inversions of different polarities as multiple data voltages to multiple pixel units during a single scan period, and by combining this with a DC common-mode voltage, make the end of the multiple pixel units receiving the common-mode voltage less susceptible to charge coupling. Thus, the cholesteric liquid crystal display can improve the horizontal crosstalk problem.

[0078] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A cholesterol-based liquid crystal display, characterized in that, include: A cholesterol-based liquid crystal panel, comprising multiple pixel units; as well as A controller, coupled to the pixel units, wherein during a frame update cycle, the controller is used to: During a first scan period, a plurality of data voltages having a first polarity combination are applied to the pixel units, wherein the first polarity combination has different polarities; as well as During the first scan period, a common-mode voltage with a DC voltage value is applied to the pixel units.

2. The cholesterol liquid crystal display as described in claim 1, characterized in that, During this screen update cycle, the controller is also used for: During a second scan period, data voltages having a second polarity combination are applied to the pixel units, wherein the second polarity combination has a different polarity and is opposite to the first polarity combination; and During the second scan period, the common-mode voltage having the DC voltage value is applied to the pixel units.

3. The cholesterol liquid crystal display as described in claim 2, characterized in that, During the screen update cycle, the controller continues to execute the second scan period after performing the first scan period.

4. The cholesterol liquid crystal display as described in claim 2, characterized in that, During this screen update cycle, after executing the first scan period, the controller continues with a swing period, and then continues with the second scan period. During the swing period, the controller applies the data voltages having the DC voltage value to the pixel units and applies the common-mode voltage having the DC voltage value to the pixel units.

5. The cholesterol liquid crystal display as described in claim 1, characterized in that, The first polarity combination includes a plurality of first columns having a first polarity and a plurality of second columns having a second polarity, wherein the first columns are adjacent to each other and adjacent to the second columns that are adjacent to each other.

6. The cholesterol liquid crystal display as described in claim 1, characterized in that, The first polarity combination includes multiple odd-numbered sequences with a first polarity and multiple even-numbered sequences with a second polarity.

7. The cholesterol liquid crystal display as described in claim 1, characterized in that, The first polarity combination includes a plurality of first rows having a first polarity and a plurality of second rows having a second polarity, wherein the first rows are adjacent to each other and adjacent to the second rows that are adjacent to each other.

8. The cholesterol liquid crystal display as described in claim 1, characterized in that, The first polarity combination includes multiple odd rows with a first polarity and multiple even rows with a second polarity.

9. The cholesterol liquid crystal display as described in claim 1, characterized in that, The first polarity combination includes a plurality of first elements having a first polarity and a plurality of second elements having a second polarity, wherein the first elements and the second elements are interleaved and arranged in a matrix.

10. The cholesterol liquid crystal display as described in claim 9, characterized in that, Each of the first elements includes multiple first child elements, and these first child elements are adjacent to each other; each of the second elements includes multiple second child elements, and these second child elements are adjacent to each other.

11. The cholesterol liquid crystal display as claimed in claim 1, characterized in that, Each pixel unit includes: A switching element having a first terminal that receives a corresponding one of the data voltages; and A cholesterol liquid crystal pixel has a first end coupled to a second end of the switching element, and the second end of the cholesterol liquid crystal pixel receives the common-mode voltage.

12. A driving method for a cholesterol liquid crystal display, characterized in that, include: During a first scan period of a frame update cycle, a controller applies multiple data voltages having a first polarity combination to multiple pixel units, wherein the first polarity combination has different polarities. as well as The controller applies a common-mode voltage with a DC voltage value to the pixel units during the first scan period.

13. The driving method as described in claim 12, characterized in that, Also includes: Through this controller, during a second scan period of the frame update cycle, data voltages having a second polarity combination are applied to the pixel units, wherein the second polarity combination has a different polarity and is opposite to the first polarity combination; and The controller applies the common-mode voltage with the DC voltage value to the pixel units during the second scan period.

14. The driving method as described in claim 13, characterized in that, During the screen update cycle, the controller continues to execute the second scan period after performing the first scan period.

15. The driving method as described in claim 12, characterized in that, Within the screen update cycle, after executing the first scan period, the controller continues to execute a swing period, and then continues to execute the second scan period. The driving method further includes: The controller applies data voltages with the DC voltage value to the pixel units during the swing period; and The controller applies the common-mode voltage with the DC voltage value to the pixel units during the swing period.

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