Liquid crystal grating and stereoscopic display device

Abstract

The present invention discloses a liquid crystal grating and a stereoscopic display device, and relates to the field of display technology. The liquid crystal grating includes a plurality of electrode groups, each of which includes N driving electrodes arranged in sequence. In the same electrode group of the liquid crystal grating, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period. i and j are not equal, and the difference between i and j is less than N-1. 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1. In this way, in adjacent electrode groups, the number of data writing periods in which there is a positive and negative voltage difference between the N-th driving electrode of the first electrode group and the first driving electrode of the second electrode group is less than N-1, which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups after the voltage polarity is changed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a liquid crystal grating and a stereoscopic display device. Background Art

[0002] Liquid crystal gratings are formed by writing specific data signals to drive the liquid crystal molecules to flip, creating a sawtooth grating. In existing liquid crystal gratings, the electrode groups of multiple drive electrodes are written with data signals in a sequential arrangement. After the transition period, the voltage polarity of the electrodes in the electrode group begins to flip, resulting in a long-term positive-negative voltage difference at the junction of two adjacent electrode groups, causing uneven display. Summary of the Invention

[0003] Embodiments of the present invention provide a liquid crystal grating and a stereoscopic display device, which shorten the duration of the positive and negative voltage difference between the two closest driving electrodes between adjacent electrode groups after voltage polarity conversion, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0004] In a first aspect, an embodiment of the present invention provides a liquid crystal grating, the liquid crystal grating comprising a plurality of electrode groups, wherein the electrode groups comprise N driving electrodes arranged in sequence;

[0005] At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes:

[0006] In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1;

[0007] Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1.

[0008] In a second aspect, an embodiment of the present invention further provides a stereoscopic display device, comprising any of the liquid crystal gratings described in the first aspect.

[0009] In an embodiment of the present invention, within the same electrode group, the difference in the number of data writing periods between the first drive electrode and the Nth drive electrode is less than N-1. Drive electrodes with the same ordinal number in different electrode groups write data signals during the same data writing period. For example, the two electrode groups are adjacent first and second electrode groups. The first drive electrode in the first electrode group and the first drive electrode in the second electrode group write data signals during the same data writing period, and the second drive electrode in the first electrode group and the second drive electrode in the second electrode group write data signals during the same data writing period. Thus, within adjacent electrode groups, the difference in the number of data writing periods between the Nth drive electrode in the first electrode group and the first drive electrode in the second electrode group is less than N-1. This embodiment of the present invention reduces the number of data writing periods in which a positive or negative voltage difference exists between the two drive electrodes closest to each other in adjacent electrode groups after voltage polarity reversal, shortens the duration of the positive or negative voltage difference between the two drive electrodes closest to each other in adjacent electrode groups after voltage polarity reversal, and improves the uniformity of images projected and displayed by the liquid crystal grating. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of a voltage writing sequence for a driving electrode in the related art;

[0011] Figure 2 This is a timing diagram of data writing to a driving electrode in the related art;

[0012] Figure 3 is a schematic diagram of the cross-sectional structure of a liquid crystal grating provided by an embodiment of the present invention;

[0013] Figure 4 This is a timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0014] Figure 5 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0015] Figure 6 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0016] Figure 7 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0017] Figure 8 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0018] Figure 9 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0019] Figure 10This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0020] Figure 11 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0021] Figure 12 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0022] Figure 13 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0023] Figure 14 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0024] Figure 15 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0025] Figure 16 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0026] Figure 17 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0027] Figure 18 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0028] Figure 19 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0029] Figure 20 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0030] Figure 21 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0031] Figure 22 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0032] Figure 23 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0033] Figure 24 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0034] Figure 25 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0035] Figure 26 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0036] Figure 27 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0037] Figure 28 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0038] Figure 29 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0039] Figure 30 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0040] Figure 31 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0041] Figure 32 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0042] Figure 33 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0043] Figure 34 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0044] Figure 35 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0045] Figure 36 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0046] Figure 37 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0047] Figure 38 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0048] Figure 39 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0049] Figure 40 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0050] Figure 41 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0051] Figure 42 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0052] Figure 43 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0053] Figure 44 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0054] Figure 45 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0055] Figure 46 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0056] Figure 47 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0057] Figure 48 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0058] Figure 49 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0059] Figure 50 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0060] Figure 51 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0061] Figure 52 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0062] Figure 53 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0063] Figure 54 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0064] Figure 55 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0065] Figure 56This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0066] Figure 57 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0067] Figure 58 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0068] Figure 59 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0069] Figure 60 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0070] Figure 61 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0071] Figure 62 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0072] Figure 63 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0073] Figure 64 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0074] Figure 65 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0075] Figure 66 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0076] Figure 67 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0077] Figure 68 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0078] Figure 69 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention.

[0079] Figure 70 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0080] Figure 71 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention;

[0081] Figure 72 This is a timing diagram of data writing into an electrode subgroup provided by an embodiment of the present invention;

[0082] Figure 73 This is a timing diagram of data writing of another electrode subgroup provided by an embodiment of the present invention;

[0083] Figure 74 This is a timing diagram of data writing of another electrode subgroup provided by an embodiment of the present invention;

[0084] Figure 75 This is a data writing timing diagram of another electrode subgroup provided by an embodiment of the present invention;

[0085] Figure 76 This is a data writing timing diagram of another electrode subgroup provided by an embodiment of the present invention;

[0086] Figure 77 This is a timing diagram of data writing of another electrode subgroup provided by an embodiment of the present invention;

[0087] Figure 78 This is a data writing timing diagram of another electrode subgroup provided by an embodiment of the present invention;

[0088] Figure 79 This is a timing diagram of data writing of another electrode subgroup provided by an embodiment of the present invention;

[0089] Figure 80 This is a circuit structure diagram of a liquid crystal grating provided by an embodiment of the present invention;

[0090] Figure 81 This is a timing diagram of a multi-way selection circuit provided by an embodiment of the present invention;

[0091] Figure 82 This is a timing diagram of another multi-way selection circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0092] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be fully described below in conjunction with the accompanying drawings of the embodiments of the present invention through specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0093] Figure 1 This is a schematic diagram of the voltage writing sequence of a driving electrode in the related art, see Figure 1The liquid crystal barrier includes multiple electrode groups 50. Each electrode group 50 includes six sequentially arranged drive electrodes. The six sequentially arranged drive electrodes are the first drive electrode D1, the second drive electrode D2, the third drive electrode D3, the fourth drive electrode D4, the fifth drive electrode D5, and the sixth drive electrode D6. During the last data writing period t0 of the previous period, the voltage written to the sixth drive electrode D6 is 6V. Therefore, the voltages of the data signals sequentially written to the six drive electrodes in the order of their spatial positions are 1V, 2V, 3V, 4V, 5V, and 6V, respectively.

[0094] Figure 2 This is a timing diagram of data writing of a driving electrode in the related art. Figure 2 The specific voltage value of the data signal written to the driving electrode during the data writing period is omitted, and the spatial ( Figure 1 and Figure 2 The driving electrodes are arranged in sequence in the horizontal direction of Figure 1 and Figure 2 The order of writing data signals one by one in the vertical direction of the Figure 2 As shown by the middle arrows, after the data change period (i.e., during the current period), the drive electrodes in electrode group 50 sequentially change the polarity of their voltages in a temporal order. The temporal order of data writing for the first drive electrode D1 through the sixth drive electrode D6 is consistent with the spatial order of data writing for the first drive electrode D1 through the sixth drive electrode D6. During the first data writing period t1, the voltage written to the first drive electrode D1 changes from 1V in the previous period to -1V in the current period. During the second data writing period t2, the voltage written to the second drive electrode D2 changes from 2V in the previous period to -2V in the current period. During the third data writing period t3, the voltage written to the third drive electrode D3 changes from 3V in the previous period to -3V in the current period. During the fourth data writing period t4, the voltage written to the fourth drive electrode D4 changes from 4V in the previous period to -4V in the current period. During the fifth data writing period t5, the voltage written to the fifth drive electrode D5 changes from 5V in the previous period to -5V in the current period. In the sixth data writing period t6 , the voltage written to the sixth driving electrode D6 changes from 6V in the previous period to −6V in the current period.

[0095] See also Figure 1 and Figure 2, the two electrode groups 50 are the adjacent first electrode group 501 and the second electrode group 502. During the voltage polarity conversion process, there will be a large positive and negative voltage difference (6V-(-1V)=7V) between the last driving electrode of the first electrode group 501 (the sixth driving electrode D6) and the first driving electrode of the second electrode group 502 (the first driving electrode D1). That is, there is a positive and negative voltage difference between the two driving electrodes closest to each other between the two adjacent electrode groups 50. Figure 2 As shown by the dotted ellipse, this large positive-negative voltage difference persists from the first data writing period t1 to the fifth data writing period t5. The large positive-negative voltage difference persists for five data writing periods. It is understandable that when the electrode group 50 includes N driving electrodes, the duration of the positive-negative voltage difference between the last driving electrode of the first electrode group 501 and the first driving electrode of the second electrode group 502 is N-1 data writing periods. A long positive-negative voltage difference means that the two driving electrodes closest to each other between adjacent electrode groups will experience a long-term lateral electric field, which will affect the normal deflection angle of the liquid crystal molecules for a long time, causing the image quality corresponding to the intersection of adjacent electrode groups to degrade and be visible to the human eye, thereby affecting the display effect of the image projected by the liquid crystal grating onto the window and affecting the uniformity of the displayed image projected by the liquid crystal grating.

[0096] Based on the above technical problems, an embodiment of the present invention provides a liquid crystal grating, which includes a plurality of electrode groups, and the electrode groups include N driving electrodes arranged in sequence. At least part of the working period of the liquid crystal grating includes a first stage. The first stage includes writing a data signal for the 1st driving electrode in the i-th data writing period, and writing a data signal for the N-th driving electrode in the j-th data writing period in the same electrode group, i and j are not equal, and the difference between i and j is less than N-1. 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1. In this way, in the same electrode group, the difference in the number of data writing periods between the 1st driving electrode and the Nth driving electrode is less than N-1. Driving electrodes with the same ordinal number in different electrode groups write data signals in the same data writing period. For example, the two electrode groups are the adjacent first electrode group and the second electrode group. The first driving electrode in the first electrode group and the first driving electrode in the second electrode group write data signals during the same data writing period, and the second driving electrode in the first electrode group and the second driving electrode in the second electrode group write data signals during the same data writing period. Thus, in adjacent electrode groups, the difference in the number of data writing periods between the Nth driving electrode in the first electrode group and the first driving electrode in the second electrode group is less than N-1. This embodiment of the present invention reduces the number of data writing periods during which a positive-negative voltage difference exists between the two closest driving electrodes in adjacent electrode groups after voltage polarity conversion, shortens the duration of the positive-negative voltage difference between the two closest driving electrodes in adjacent electrode groups after voltage polarity conversion, and improves the uniformity of images projected and displayed by the liquid crystal grating.

[0097] The above is the core concept of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without inventive work are within the scope of protection of the present invention. The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings.

[0098] Figure 3 is a schematic diagram of the cross-sectional structure of a liquid crystal grating provided by an embodiment of the present invention, such as Figure 3In the illustrated embodiment, the liquid crystal grating includes a first substrate 10, a second substrate 20, and a liquid crystal layer 30. The liquid crystal layer 30 is located between the first substrate 10 and the second substrate 20. The liquid crystal layer 30 includes a plurality of liquid crystal molecules, which may be positive liquid crystal molecules or negative liquid crystal molecules. The liquid crystal grating also includes an opposing electrode 40 and a plurality of electrode groups 50. In a direction perpendicular to the plane of the first substrate 10, the electrode group 50 is located between the first substrate 10 and the liquid crystal layer 30. The electrode group 50 includes N driving electrodes arranged in sequence. In a direction perpendicular to the plane of the first substrate 10, the opposing electrode 40 is located between the second substrate 20 and the liquid crystal layer 30. Furthermore, a first dielectric layer (not shown in the figure) may be included between the first substrate 10 and the electrode group 50, and a second dielectric layer (not shown in the figure) may be included between the opposing electrode 40 and the second substrate 20. The first dielectric layer and the second dielectric layer can, on the one hand, protect the liquid crystal grating and prevent it from being damaged by the external environment. On the other hand, they can effectively isolate the charges between the electrodes, prevent charge leakage and arcing, and ensure that the liquid crystal grating can operate normally. The drive electrodes 510 are independently arranged, and there is a gap between adjacent drive electrodes 510. The opposing electrode 40 can be a full-surface electrode. When there is a voltage difference between the drive electrode 510 and the opposing electrode 40, a longitudinal electric field is formed between the drive electrode 510 and the opposing electrode 40, and the longitudinal electric field can drive the liquid crystal molecules in the liquid crystal layer 30 to rotate.

[0099] Figure 4 This is a timing diagram of data writing to a driving electrode provided by an embodiment of the present invention, see Figure 4 At least part of the operating period of the liquid crystal grating includes a first stage, which includes: in the same electrode group 50, writing a data signal to the first driving electrode in the i-th data writing period, and writing a data signal to the N-th driving electrode in the j-th data writing period, where i and j are not equal, and the difference between i and j is less than N-1. Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1.

[0100] Specifically, among the N driving electrodes of the same electrode group 50, data signals are written to the N driving electrodes during N data writing periods, and data signals are written to any two driving electrodes during different data writing periods. In other words, during the N data writing periods, data signals are written to the N driving electrodes one by one, and the data writing periods during which the data signals are written to each driving electrode are different. When a data signal is written to the first driving electrode during the first data writing period t1, and when a data signal is written to the Nth driving electrode during the Nth data writing period, the difference between i and j is equal to N-1. Therefore, to ensure that the difference between i and j is less than N-1, it means that a data signal is not written to the first driving electrode during the first data writing period t1, and / or a data signal is not written to the Nth driving electrode during the Nth data writing period. Similarly, when a data signal is written to the first driving electrode during the Nth data writing period, and when a data signal is written to the Nth driving electrode during the first data writing period t1, the difference between i and j is equal to N-1. Therefore, to ensure that the difference between i and j is less than N-1, it means that the data signal is not written to the Nth drive electrode in the first data writing period t1, and / or the data signal is not written to the first drive electrode in the last data writing period. In this way, the difference in the number of data writing periods between the first drive electrode and the Nth drive electrode in the same electrode group 50 is less than N-1. Because the drive electrodes 510 at the same position in different electrode groups 50 are written with data signals in the same data writing period. In adjacent electrode groups 50, the difference in the number of data writing periods between the Nth drive electrode of the first electrode group 501 and the first drive electrode of the second electrode group 502 is less than N-1. This reduces the length of time that a positive and negative voltage difference exists between the two drive electrodes closest to each other in adjacent electrode groups after the voltage polarity is reversed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0101] For example, Figure 4In the illustrated embodiment, a single electrode group 50 includes six drive electrodes, and data signals are written to each of the six drive electrodes during six data writing periods. The six sequentially arranged drive electrodes are the first drive electrode D1, the second drive electrode D2, the third drive electrode D3, the fourth drive electrode D4, the fifth drive electrode D5, and the sixth drive electrode D6. During the first data writing period t1, a data signal is written to the first drive electrode D1, and during the fifth data writing period t5, a data signal is written to the sixth drive electrode D6. That is, if N = 6, i = 1, and j = 5, the difference between i and j is 4. After the voltage polarity is reversed, the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent electrode groups 50 is four data writing periods, which is shorter than the five data writing periods in the prior art. Therefore, the embodiment of the present invention reduces the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent electrode groups after the voltage polarity is reversed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0102] It should be noted that Figure 4 The example of writing a data signal to the first driving electrode D1 in the first data writing period t1 and writing a data signal to the sixth driving electrode D6 in the fifth data writing period t5 is used for illustration only, but this is not limiting. In other embodiments, other writing orders can also be used, as long as it is ensured that in the same electrode group 50, the data signal is written to the first driving electrode in the i-th data writing period and the data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1.

[0103] Optional, see Figure 4 In the same electrode group 50, a data signal is written to the kth driving electrode during the fth data writing period, and a data signal is written to the k+1th driving electrode during the gth data writing period. f and g are not equal, and the difference between f and g is less than N-1, where 1≤f≤N, 1≤g≤N, and 1≤k≤N-1, and f, g, and k are positive integers.

[0104] Specifically, the kth drive electrode and the k+1th drive electrode are two adjacent drive electrodes in the same electrode group 50. The difference between f and g is less than N-1, which means that the data signal is not written to the kth drive electrode in the first data writing period t1, and / or the data signal is not written to the k+1th drive electrode in the Nth data writing period. The data signal is not written to the k+1th drive electrode in the first data writing period t1, and / or the data signal is not written to the kth drive electrode in the Nth data writing period. The embodiments of the present invention can reduce the number of data writing periods in which a voltage difference exists between adjacent drive electrodes 510 in the same electrode group 50, reduce the length of time that a voltage difference exists between adjacent drive electrodes 510 in the same electrode group 50, and improve the uniformity of the image projected and displayed by the liquid crystal grating.

[0105] For example, Figure 4 In the embodiment shown, a data signal is written to the fourth drive electrode D4 during the second data writing period t2, and a data signal is written to the fifth drive electrode D5 during the sixth data writing period t6. If f = 2, g = 6, k = 4, and N = 6, then the difference between f and g is 4. That is, within the same electrode group 50, there is a voltage difference of four data writing periods between adjacent drive electrodes 510, which reduces the duration of the voltage difference between adjacent drive electrodes 510 within the same electrode group 50. Furthermore, if Figure 4 In the embodiment shown, within the same electrode group 50, the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 can also include 1 data writing period or 2 data writing periods, thereby improving the uniformity of the image displayed by the liquid crystal grating projection compared to the solution with 5 data writing periods in the prior art.

[0106] It should be noted that Figure 4 For example, the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 includes 1 data writing period, 2 data writing periods, and 4 data writing periods, but this is not limiting.

[0107] Optional, see Figure 4 In the same electrode group 50, a data signal is written to the kth driving electrode during the fth data writing period, and a data signal is written to the sth driving electrode during the f+1th data writing period. There is at least one driving electrode between the kth driving electrode and the sth driving electrode. Wherein, 1≤f≤N-1, 1≤k≤N, 1≤s≤N, and f, k, and s are positive integers.

[0108] Specifically, during two adjacent data writing periods, data signals are written to the kth drive electrode and the sth drive electrode, respectively. There is at least one drive electrode between the kth drive electrode and the sth drive electrode, so that data signals are not written one by one in chronological order according to the arrangement position of at least a portion of the drive electrodes 510. This reduces the duration of the voltage difference between adjacent drive electrodes 510 in the same electrode group 50, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0109] For example, Figure 4 In the illustrated embodiment, a data signal is written to the fourth drive electrode D4 during the second data writing period t2, and a data signal is written to the second drive electrode D2 during the third data writing period t3. If f = 2, s = 2, k = 4, and N = 6, the difference between s and k is 2. That is, within the same electrode group 50, the distance between two drive electrodes where data signals are written during two adjacent data writing periods is one drive electrode.

[0110] Figure 5 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 6 This is another data writing timing diagram of the driving electrode provided by the embodiment of the present invention, see Figure 5 and Figure 6 , i=1, j=2, in the same electrode group 50, the data signal is written to the first driving electrode in the first data writing period t1, and the data signal is written to the Nth driving electrode in the second data writing period t2.

[0111] For example, Figure 5 In the embodiment shown, the six driving electrodes are arranged from left to right, with the first driving electrode D1 located at the leftmost side of the same electrode group 50, and the sixth driving electrode D6 located at the rightmost side of the same electrode group 50. It should be noted that the embodiment of the present invention does not limit the arrangement order of the driving electrodes 510. In other embodiments, such as Figure 6 As shown, the six driving electrodes may also be arranged sequentially from right to left, that is, the first driving electrode D1 is located at the rightmost side of the same electrode group 50 , and the sixth driving electrode D6 is located at the leftmost side of the same electrode group 50 .

[0112] For example, Figure 5In the illustrated embodiment, a data signal is written to the first drive electrode D1 during the first data writing period t1, and a data signal is written to the sixth drive electrode D6 during the second data writing period t2. In adjacent electrode groups 50, the difference in the number of data writing periods between the last drive electrode (i.e., the sixth drive electrode D6) of the first electrode group 501 and the first drive electrode (i.e., the first drive electrode D1) of the second electrode group 502 is one. This reduces the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent electrode groups 50 after voltage polarity reversal, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0113] Figure 7 This is another timing diagram of data writing to the driving electrodes provided by an embodiment of the present invention. Figure 7 , the electrode group 50 includes a first subgroup 50A. In the same first subgroup 50A, data signals are written to the driving electrodes 510 in sequence, from the edge of the first subgroup 50A to the center of the first subgroup 50A, and alternately from beginning to end. The edge of the first subgroup 50A can be understood as the first driving electrode or the last driving electrode of the first subgroup 50A. The center of the first subgroup 50A can be understood as the driving electrode 510 in the central area of ​​the first subgroup 50A. When the first subgroup 50A includes an even number of driving electrodes, the center of the first subgroup 50A includes two driving electrodes. When the first subgroup 50A includes an odd number of driving electrodes, the center of the first subgroup 50A includes one driving electrode.

[0114] For example, Figure 7 In the embodiment shown, an electrode group 50 includes a first type subgroup 50A. The first driving electrode in the electrode group 50 is the first driving electrode in the first type subgroup 50A, and the sixth driving electrode in the electrode group 50 is the sixth driving electrode in the first type subgroup 50A. In this embodiment, the first type subgroup 50A is the electrode group 50. In the first data writing period t1, the data signal is written to the first driving electrode, and in the second data writing period t2, the data signal is written to the Nth driving electrode, and when the first type subgroup 50A includes an even number of driving electrodes (N is an even number), the time sequence for writing data signals to the N driving electrodes is: the first driving electrode, the Nth driving electrode, the second driving electrode, the N-1th driving electrode, ..., the Nth driving electrode. driving electrodes, driving electrodes. Thus, on the one hand, the difference in the number of data writing time periods between the 1st driving electrode and the Nth driving electrode in the same electrode group 50 (i.e., the first subgroup 50A) is 1, and in adjacent electrode groups 50 (i.e., the first subgroup 50A), the difference in the number of data writing time periods between the Nth driving electrode of the first electrode group 501 and the 1st driving electrode of the second electrode group 502 is 1, thereby reducing the length of time that a positive and negative voltage difference exists between the two closest driving electrodes in adjacent first subgroups 50A after the voltage polarity is reversed. On the other hand, in the same electrode group 50 (i.e., the first subgroup 50A), because data signals are written to the driving electrodes 510 in an alternating manner, data signals are written to adjacent driving electrodes in adjacent data writing time periods at the center of the first subgroup 50A. Except for the center of the first subgroup 50A, the number of data writing time periods during which a voltage difference exists between adjacent driving electrodes 510 at other locations is 2. In other words, in the same first-type subgroup 50A, the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 is 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0115] like Figure 7 In the embodiment shown, taking N=6 as an example, the time order for writing data signals to the six drive electrodes is: the first drive electrode (first drive electrode D1), the sixth drive electrode (sixth drive electrode D6), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the third drive electrode (third drive electrode D3), and the fourth drive electrode (fourth drive electrode D4).

[0116] It is understandable that Figure 7 The present invention is only described in one embodiment by way of example, but is not intended to be limiting. Other embodiments are described below with reference to the accompanying drawings.

[0117] Figure 8 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 8 In the embodiment shown, an electrode group 50 includes a first type subgroup 50A. In this embodiment, the first type subgroup 50A is the electrode group 50. In the first data writing period t1, the data signal is written to the Nth driving electrode, and in the second data writing period t2, the data signal is written to the 1st driving electrode. When the first type subgroup 50A includes an even number of driving electrodes (N is an even number), the time sequence of writing the data signal to the N driving electrodes is: the Nth driving electrode, the 1st driving electrode, the N-1th driving electrode, the 2nd driving electrode, ..., the 3rd driving electrode. driving electrodes, driving electrodes. Thus, within adjacent electrode groups 50 (i.e., first-type subgroups 50A), the difference in the number of data writing periods between the Nth driving electrode in the first electrode group 501 and the first driving electrode in the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest driving electrodes in adjacent first-type subgroups 50A after voltage polarity reversal. Furthermore, within the same first-type subgroup 50A, the number of data writing periods during which a voltage difference exists between adjacent driving electrodes 510 is either one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0118] Figure 8 In the example, N=6 is used for explanation, that is, the time sequence of writing data signals to the 6 driving electrodes is: the 6th driving electrode (sixth driving electrode D6), the 1st driving electrode (first driving electrode D1), the 5th driving electrode (fifth driving electrode D5), the 2nd driving electrode (second driving electrode D2), the 4th driving electrode (fourth driving electrode D4), and the 3rd driving electrode (third driving electrode D3).

[0119] Figure 9 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 9 In the embodiment shown, one electrode group 50 includes one first type subgroup 50A. In this embodiment, the first type subgroup 50A is the electrode group 50. In the first data writing period t1, the data signal is written to the first driving electrode, and in the second data writing period t2, the data signal is written to the Nth driving electrode. When the first type subgroup 50A includes an odd number of driving electrodes (N is an odd number), the time sequence of writing the data signal to the N driving electrodes is: the first driving electrode, the Nth driving electrode, the second driving electrode, the N-1th driving electrode, ..., the Nth driving electrode. driving electrodes. Thus, within adjacent electrode groups 50 (i.e., first-type subgroups 50A), the difference in the number of data writing periods between the Nth driving electrode in the first electrode group 501 and the first driving electrode in the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest driving electrodes in adjacent first-type subgroups 50A after voltage polarity conversion. Furthermore, within the same first-type subgroup 50A, the number of data writing periods during which a voltage difference exists between adjacent driving electrodes 510 is either 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0120] Figure 9In the example, N=7 is used for explanation, that is, the time sequence of writing data signals to the 7 drive electrodes is: the first drive electrode (first drive electrode D1), the seventh drive electrode (seventh drive electrode D7), the second drive electrode (second drive electrode D2), the sixth drive electrode (sixth drive electrode D6), the third drive electrode (third drive electrode D3), the fifth drive electrode (fifth drive electrode D5), and the fourth drive electrode (fourth drive electrode D4).

[0121] Figure 10 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 10 In the embodiment shown, an electrode group 50 includes a first type subgroup 50A. In this embodiment, the first type subgroup 50A is the electrode group 50. In the first data writing period t1, a data signal is written to the Nth driving electrode, and in the second data writing period t2, a data signal is written to the 1st driving electrode. When the first type subgroup 50A includes an odd number of driving electrodes (N is an odd number), the time sequence of writing data signals to the N driving electrodes is: the Nth driving electrode, the 1st driving electrode, the N-1th driving electrode, the 2nd driving electrode, ..., the 3rd driving electrode. driving electrodes. Thus, within adjacent electrode groups 50 (i.e., first-type subgroups 50A), the difference in the number of data writing periods between the Nth driving electrode in the first electrode group 501 and the first driving electrode in the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest driving electrodes in adjacent first-type subgroups 50A after voltage polarity conversion. Furthermore, within the same first-type subgroup 50A, the number of data writing periods during which a voltage difference exists between adjacent driving electrodes 510 is either 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0122] Figure 10 In the example, N=7 is used for explanation, that is, the time sequence of writing data signals to the 7 driving electrodes is: the 7th driving electrode (seventh driving electrode D7), the 1st driving electrode (first driving electrode D1), the 6th driving electrode (sixth driving electrode D6), the 2nd driving electrode (second driving electrode D2), the 5th driving electrode (fifth driving electrode D5), the 3rd driving electrode (third driving electrode D3), and the 4th driving electrode (fourth driving electrode D4).

[0123] It should be noted that, in the above embodiment, N driving electrodes are arranged sequentially from left to right as an example for description, but the embodiment of the present invention is not limited to this.

[0124] Figure 11 This is another timing diagram of data writing to the driving electrodes provided by an embodiment of the present invention. Figure 11The electrode group 50 includes a second subgroup 50B. Within the same second subgroup 50B, data signals are written to the driving electrodes 510 one by one, starting from the first driving electrode in the second subgroup 50B to the last driving electrode in the second subgroup 50B. The writing of data signals to the driving electrodes 510 one by one, starting from the first driving electrode in the second subgroup 50B to the last driving electrode in the second subgroup 50B, can be understood as meaning that the arrangement order of the driving electrodes 510 in the second subgroup 50B is the same as the temporal order in which the data signals are written to the driving electrodes 510, or that the arrangement order of the driving electrodes 510 in the second subgroup 50B is opposite to the temporal order in which the data signals are written to the driving electrodes 510. For example, when the plurality of driving electrodes in the electrode group 50 are arranged sequentially from left to right, the temporal order in which the data signals are written to the driving electrodes 510 in the second subgroup 50 can be from left to right, or the temporal order in which the data signals are written to the driving electrodes 510 in the second subgroup 50 can be from right to left.

[0125] For example, Figure 11 In the illustrated embodiment, an electrode group 50 includes a second subgroup 50B. The six driving electrodes in the electrode group 50 are arranged sequentially from left to right, with the first driving electrode D1 located at the leftmost position within the same electrode group 50, and the sixth driving electrode D6 located at the rightmost position within the same electrode group 50. The second driving electrode (the second driving electrode D2) in the electrode group 50 is the first driving electrode in the second subgroup 50B, and the fourth driving electrode (the fourth driving electrode D4) in the electrode group 50 is the last driving electrode in the second subgroup 50B. When a data signal is written to the first driving electrode during the first data writing period t1, the data signal is written to the Nth driving electrode during the second data writing period t2, and the data signal is written to the N-1th driving electrode during the third data writing period t3, the data signals are written to the multiple driving electrodes in the second subgroup 50B in the following order: the second driving electrode, the third driving electrode, ..., the N-2th driving electrode. That is, the time sequence in which the data signals are written to the multiple driving electrodes in the second subgroup 50B is the same as the arrangement order of the driving electrodes 510. Thus, within the same second subgroup 50B, the number of data writing periods during which a voltage difference exists between adjacent driving electrodes 510 is one, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0126] Figure 11In the example, N=6 is used for explanation, that is, the time sequence of writing data signals to the 6 driving electrodes is: the first driving electrode (first driving electrode D1), the sixth driving electrode (sixth driving electrode D6), the fifth driving electrode (fifth driving electrode D5), the second driving electrode (second driving electrode D2), the third driving electrode (third driving electrode D3), and the fourth driving electrode (fourth driving electrode D4).

[0127] The above embodiment is described by taking the second type sub-group 50B where the arrangement order of the driving electrodes 510 is the same as the time order of writing the data signals as an example. The following description is made with reference to specific drawings where the arrangement order of the driving electrodes 510 in the second type sub-group 50B is opposite to the time order of writing the data signals.

[0128] Figure 12 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 12 In the illustrated embodiment, the first electrode group 50 includes a second subgroup 50B. The six driving electrodes in the electrode group 50 are arranged sequentially from left to right, with the first driving electrode D1 located at the leftmost position within the same electrode group 50, and the sixth driving electrode D6 located at the rightmost position within the same electrode group 50. The third driving electrode (third driving electrode D3) in the electrode group 50 is the first driving electrode in the second subgroup 50B, and the fifth driving electrode (fifth driving electrode D5) in the electrode group 50 is the last driving electrode in the second subgroup 50B. When a data signal is written to the Nth driving electrode during the first data writing period t1, the data signal is written to the first driving electrode during the second data writing period t2, and the data signal is written to the second driving electrode during the third data writing period t3, the data signals are written to the multiple driving electrodes in the second subgroup 50B in the following order: the N-1th driving electrode, the N-2th driving electrode, ..., the third driving electrode. That is, the time sequence in which the data signals are written to the plurality of driving electrodes 510 in the second subgroup 50B is opposite to the arrangement order of the driving electrodes 510 in the second subgroup 50B. Thus, within the same second subgroup 50B, the number of data writing periods during which a voltage difference exists between adjacent driving electrodes 510 is one, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0129] Figure 12 In the example, N=6 is used for explanation, that is, the time sequence of writing data signals to the 6 driving electrodes is: the 6th driving electrode (sixth driving electrode D6), the 1st driving electrode (first driving electrode D1), the 2nd driving electrode (second driving electrode D2), the 5th driving electrode (fifth driving electrode D5), the 4th driving electrode (fourth driving electrode D4), and the 3rd driving electrode (third driving electrode D3).

[0130] Figure 13 This is another timing diagram of data writing to the driving electrodes provided by an embodiment of the present invention. Figure 13 The second driving electrode, the third driving electrode, ..., and the N-1th driving electrode in the electrode group 50 constitute a second subgroup 50B. In the same electrode group 50, the time sequence for writing data signals to the N driving electrodes is: the first driving electrode, the Nth driving electrode, and the second subgroup 50B.

[0131] For example, Figure 13 In the illustrated embodiment, an electrode group 50 includes a second subgroup 50B. The six driving electrodes in the electrode group 50 are arranged sequentially from left to right. The second driving electrode (second driving electrode D2) in the electrode group 50 is the first driving electrode in the second subgroup 50B, and the fifth driving electrode (fifth driving electrode D5) in the electrode group 50 is the last driving electrode in the second subgroup 50B. In other words, the second driving electrode, the third driving electrode, ..., and the N-1th driving electrode in the electrode group 50 constitute the second subgroup 50B. During the first data writing period t1, a data signal is written to the first driving electrode, and during the second data writing period t2, a data signal is written to the Nth driving electrode. The time sequence for writing data signals to the multiple driving electrodes in the second subgroup 50B can be the same as or opposite to the arrangement order of the driving electrodes 510. Thus, in the same electrode group 50, the time sequence for writing data signals to the N driving electrodes is the first driving electrode, the Nth driving electrode, and then the second subgroup 50B. In this way, in the same second-type subgroup 50B, the number of data writing time periods in which there is a voltage difference between adjacent driving electrodes 510 is 1, and in the adjacent electrode groups 50, the difference in the number of data writing time periods between the Nth driving electrode of the first electrode group 501 and the 1st driving electrode of the second electrode group 502 is 1, which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0132] Figure 13 In the example, N=6 is used for explanation, that is, the time sequence of writing data signals to the 6 driving electrodes is: the first driving electrode (first driving electrode D1), the sixth driving electrode (sixth driving electrode D6), the second driving electrode (second driving electrode D2), the third driving electrode (third driving electrode D3), the fourth driving electrode (fourth driving electrode D4), and the fifth driving electrode (fifth driving electrode D5).

[0133] Figure 14 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 15This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 14 and Figure 15 , i=N-1, j=N, in the same electrode group 50, the data signal is written to the first driving electrode in the N-1th data writing period, and the data signal is written to the Nth driving electrode in the Nth data writing period.

[0134] For example, Figure 14 In the illustrated embodiment, six drive electrodes are arranged sequentially from left to right, with the first drive electrode D1 located at the leftmost side of the same electrode group 50, and the sixth drive electrode D6 located at the rightmost side of the same electrode group 50. A data signal is written to the first drive electrode during the fifth data writing period t5, and to the sixth drive electrode D6 during the sixth data writing period t6. In other words, data signals are written to the two drive electrodes (the first drive electrode D1 and the sixth drive electrode D6) located at the outermost edges of the electrode group 50 during the last and penultimate data writing periods, respectively. In adjacent electrode groups 50, the difference in the number of data writing periods between the last drive electrode (the sixth drive electrode D6) of the first electrode group 501 and the first drive electrode (the first drive electrode D1) of the second electrode group 502 is one. This reduces the duration of the positive and negative voltage difference between the two closest drive electrodes in adjacent electrode groups 50 after voltage polarity reversal, thereby improving the uniformity of the image projected by the liquid crystal grating.

[0135] It should be noted that the embodiment of the present invention only limits the writing of data signals to the first and last driving electrodes of the electrode group 50 in the last two data writing periods, but does not limit the writing of data signals to the driving electrodes 510 in the first data writing period. Figure 14 and Figure 15 The following description is made by taking the driving electrode 510 located at the center of the electrode group 50 as an example in which the data signal is first written. Figure 14 In the embodiment shown, N is an even number, and the driving electrodes 510 located at the center of the electrode group 50 are the third driving electrode D3 and the fourth driving electrode D4. In the first data writing period t1, a data signal is written to the third driving electrode (the third driving electrode D3). In other embodiments, a data signal may also be written to the fourth driving electrode (the fourth driving electrode D4) in the first data writing period t1. That is, when N is an even number, in the first data writing period t1, a data signal is written to the fourth driving electrode (the fourth driving electrode D4). A driving electrode or The data signal is written into each driving electrode. Figure 15In the embodiment shown, N is an odd number, and the driving electrode 510 located at the center of the electrode group 50 is the fourth driving electrode D4. In the first data writing period t1, the data signal is written to the fourth driving electrode (the fourth driving electrode D4). That is, when N is an odd number, in the first data writing period t1, the data signal is written to the fourth driving electrode (the fourth driving electrode D4). The data signal is written into each driving electrode.

[0136] Figure 16 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 16 , the electrode group 50 includes a third subgroup 50C. In the same third subgroup 50C, data signals are written to the driving electrodes 510 in sequence, starting from the center of the third subgroup 50C and ending at the edge of the third subgroup 50C, alternating from beginning to end. The edge of the third subgroup 50C can be understood as the first driving electrode or the last driving electrode of the third subgroup 50C. The center of the third subgroup 50C can be understood as the driving electrode 510 in the central area of ​​the third subgroup 50C. When the third subgroup 50C includes an even number of driving electrodes, the center of the third subgroup 50C includes two driving electrodes. When the third subgroup 50C includes an odd number of driving electrodes, the center of the third subgroup 50C includes one driving electrode.

[0137] For example, Figure 16 In the embodiment shown, an electrode group 50 includes a third subgroup 50C. The first driving electrode in the electrode group 50 is the first driving electrode in the third subgroup 50C, and the sixth driving electrode in the electrode group 50 is the sixth driving electrode in the third subgroup 50C. In this embodiment, the third subgroup 50C is the electrode group 50. When the data signal is written to the first driving electrode in the 5th (N-1)th data writing period, and the data signal is written to the Nth driving electrode in the 6th (N)th data writing period, and the third subgroup 50C includes an even number of driving electrodes (N is an even number), in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the Nth driving electrode. On the one hand, the difference in the number of data writing time periods between the first driving electrode and the Nth driving electrode within the same electrode group 50 (i.e., the third subgroup 50C) is 1. In adjacent electrode groups 50 (i.e., the third subgroup 50C), the difference in the number of data writing time periods between the Nth driving electrode of the first electrode group 501 and the first driving electrode of the second electrode group 502 is 1. This reduces the duration of the positive and negative voltage difference between the two closest driving electrodes in adjacent third subgroups 50C after the voltage polarity is reversed. On the other hand, within the same electrode group 50 (i.e., the third subgroup 50C), because data signals are written to the driving electrodes 510 alternately from the center of the third subgroup 50C, data signals are written to adjacent driving electrodes 510 during adjacent data writing time periods at the center of the third subgroup 50C. That is, except for the center of the third subgroup 50C, the number of data writing time periods during which a voltage difference exists between adjacent driving electrodes 510 at other locations is two. In other words, in the same third subgroup 50C, the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 is 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0138] like Figure 16 In the embodiment shown, N=6 is used for illustration, and the time order for writing data signals to the six drive electrodes is: the third drive electrode (third drive electrode D3), the fourth drive electrode (fourth drive electrode D4), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the first drive electrode (first drive electrode D1), and the sixth drive electrode (sixth drive electrode D6).

[0139] It is understandable that Figure 16 The present invention is only described in one embodiment by way of example, but is not intended to be limiting. Other embodiments are described below with reference to the accompanying drawings.

[0140] Figure 17 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 17 In the embodiment shown, an electrode group 50 includes a third subgroup 50C. In this embodiment, the third subgroup 50C is the electrode group 50. In the 5th (N-1)th data writing period, the data signal is written to the Nth driving electrode, and in the 6th (N)th data writing period, the data signal is written to the 1st driving electrode. The third subgroup 50C includes an even number of driving electrodes (when N is an even number). The time sequence of writing data signals to the N driving electrodes is: driving electrodes, driving electrodes, driving electrodes, drive electrode, ..., the Nth drive electrode, and the 1st drive electrode. Thus, in adjacent electrode groups 50 (i.e., third-type subgroup 50C), the difference in the number of data writing periods between the Nth drive electrode of the first electrode group 501 and the 1st drive electrode of the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent third-type subgroups 50C after voltage polarity conversion. Furthermore, in the same third-type subgroup 50C, the number of data writing periods during which a voltage difference exists between adjacent drive electrodes 510 is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0141] Figure 17 In the example, N=6 is used for explanation, that is, the time sequence of writing data signals to the 6 driving electrodes is: the 4th driving electrode (fourth driving electrode D4), the 3rd driving electrode (third driving electrode D3), the 5th driving electrode (fifth driving electrode D5), the 2nd driving electrode (second driving electrode D2), the 6th driving electrode (sixth driving electrode D6), and the 1st driving electrode (first driving electrode D1).

[0142] Figure 18 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 18 In the embodiment shown, one electrode group 50 includes one third subgroup 50C. In this embodiment, the third subgroup 50C is the electrode group 50. In the 6th (N-1)th data writing period, the data signal is written to the 1st driving electrode, and in the 7th (N)th data writing period, the data signal is written to the Nth driving electrode. When the third subgroup 50C includes an odd number of driving electrodes (N is an odd number), the time sequence of writing the data signals to the N driving electrodes is: driving electrodes, driving electrodes, driving electrodes, drive electrodes, ..., the 1st drive electrode, the Nth drive electrode. Thus, in adjacent electrode groups 50 (i.e., third subgroup 50C), the difference in the number of data writing periods between the Nth drive electrode of the first electrode group 501 and the 1st drive electrode of the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent third subgroups 50C after voltage polarity conversion. Furthermore, in the same third subgroup 50C, the number of data writing periods during which a voltage difference exists between adjacent drive electrodes 510 is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0143] Figure 18In the example, N=7 is used for explanation, that is, the time sequence of writing data signals to the 7 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), and the 7th drive electrode (seventh drive electrode D7).

[0144] Figure 19 This is another timing diagram of data writing to the driving electrode provided by an embodiment of the present invention. Figure 19 In the embodiment shown, one electrode group 50 includes one third subgroup 50C. In this embodiment, the third subgroup 50C is the electrode group 50. When the data signal is written to the Nth driving electrode in the 6th (N-1) data writing period, and the data signal is written to the 1st driving electrode in the 7th (N-1) data writing period, and the third subgroup 50C includes an odd number of driving electrodes (N is an odd number), the time sequence of writing the data signal to the N driving electrodes is: driving electrodes, driving electrodes, driving electrodes, drive electrode, ..., the Nth drive electrode, and the 1st drive electrode. Thus, in adjacent electrode groups 50 (i.e., third-type subgroup 50C), the difference in the number of data writing periods between the Nth drive electrode of the first electrode group 501 and the 1st drive electrode of the second electrode group 502 is 1. This reduces the duration of the positive-negative voltage difference between the two closest drive electrodes in adjacent third-type subgroups 50C after voltage polarity conversion. Furthermore, in the same third-type subgroup 50C, the number of data writing periods during which a voltage difference exists between adjacent drive electrodes 510 is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0145] Figure 19 In the example, N=7 is used for explanation, that is, the time sequence of writing data signals to the 7 drive electrodes is: the 4th drive electrode (fourth drive electrode), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), and the 1st drive electrode (first drive electrode D1).

[0146] The above embodiments are all described by taking the example that the electrode group 50 includes one electrode sub-group. The following describes the electrode group 50 including multiple electrode sub-groups in conjunction with specific implementation methods.

[0147] Figure 20 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 20 The electrode group 50 includes M electrode subgroups 520 arranged in sequence, and the electrode subgroup 520 includes a plurality of driving electrodes 510. During the M subgroup writing period, data signals are sequentially written into the M electrode subgroups 520 one by one. The subgroup writing period includes a plurality of data writing periods, where M is a positive integer greater than 1.

[0148] For example, Figure 20 In the embodiment shown. The same electrode group 50 includes 8 driving electrodes 510 arranged in sequence from left to right. The electrode group 50 includes two electrode sub-groups 520, and the two electrode sub-groups 520 are respectively the first electrode sub-group 521 and the second electrode sub-group 522. Each electrode sub-group 520 includes 4 driving electrodes 510. The number of electrode sub-groups 520 corresponds to the number of sub-group writing time periods, and the number of data writing time periods in each sub-group writing time period corresponds to the number of driving electrodes 510 in each electrode sub-group 520. In an embodiment of the present invention, scanning can be performed in the manner of electrode sub-groups. That is, in a sub-group writing time period, a data signal is written to the driving electrode 510 in an electrode sub-group 520, and after all the driving electrodes 510 in the electrode sub-group 520 are written with the data signal, the data signal writing of the driving electrode 510 in another electrode sub-group 520 is performed. That is, during different sub-group writing periods, data signals are written for the driving electrodes 510 in different electrode sub-groups 520. In this way, by writing data signals to each electrode sub-group in sequence, the length of time that a voltage difference exists between the first driving electrode 510 and the last driving electrode 510 in the same electrode group 50 can be reduced, and the length of time that a positive and negative voltage difference exists between the two driving electrodes closest to each other in adjacent electrode groups 50 after the voltage polarity is changed can be reduced, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0149] Figure 21 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 21The multiple electrode subgroups 520 include a first electrode subgroup 521 and a second electrode subgroup 522. During the u-th subgroup write period, data signals are written to the driving electrodes 510 in the first electrode subgroup 521. During the v-th subgroup write period, data signals are written to the driving electrodes 510 in the second electrode subgroup 522. (v>u, where u and v are positive integers.) The first electrode subgroup 521 is a third-type subgroup 50C. Within the same third-type subgroup 50C, data signals are written to the driving electrodes 510 in a sequential order, starting from the center of the third-type subgroup 50C to the edge of the third-type subgroup 50C, alternating from beginning to end. The second electrode subgroup 522 is a first-type subgroup 50A. Within the same first-type subgroup 50A, data signals are written to the driving electrodes 510 in a sequential order, starting from the edge of the first-type subgroup 50A to the center of the first-type subgroup 50A, alternating from beginning to end.

[0150] For example, Figure 21 In the illustrated embodiment, M=2, and the two electrode subgroups 520 are the first electrode subgroup 521 and the second electrode subgroup 522. The first electrode subgroup 521 includes the first to h-th drive electrodes. The second electrode subgroup 522 includes the h+1-th to N-th drive electrodes, where h is a positive integer greater than 1. The two subgroup write periods are the first subgroup write period and the second subgroup write period. The first subgroup write period includes the first data write period t1 to the h-th data write period, and the second subgroup write period includes the h+1-th to N-th data write periods. In the first subgroup writing period, the data signal is written to the driving electrode 510 in the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the driving electrode in the second electrode subgroup 522, and when h is an even number and N is an even number, since the first electrode subgroup 521 is the third type subgroup 50C and the second electrode subgroup 522 is the first type subgroup 50A, the time sequence of writing the data signal to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes, In this way, the data writing order of the driving electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternates from the beginning to the end. Then, the data writing time of the first driving electrode is close to the last data writing period in the first sub-group writing period (the second to last data writing period in the first sub-group writing period, i.e., the fifth data writing period t5). The data writing order for the drive electrodes 510 within the second electrode subgroup 522 is from the edge to the center, alternating from the beginning to the end. Therefore, the data writing period for the Nth drive electrode is close to the first data writing period in the second subgroup writing period (the second data writing period in the second subgroup writing period, i.e., the eighth data writing period t8). After the data signal is sequentially written to each electrode subgroup 520, the data writing time for the first drive electrode and the last drive electrode in the same electrode group 50 are similar (a difference of three data writing periods). In adjacent electrode groups 50, the data writing time between the Nth drive electrode in the first electrode group 501 and the first drive electrode in the second electrode group 502 is similar, thereby reducing the duration of the positive and negative voltage difference between the two closest drive electrodes in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the first electrode subgroup 521, the number of data writing periods during which a voltage difference exists between adjacent drive electrodes 510 is one or two. In the second electrode subgroup 522 , the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 is 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0151] Figure 21The example of N=12 and h=6 is used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 3rd drive electrode, the 4th drive electrode, the 2nd drive electrode, the 5th drive electrode, the 1st drive electrode, the 6th drive electrode, the 7th drive electrode, the 12th drive electrode, the 8th drive electrode, the 11th drive electrode, the 9th drive electrode, and the 10th drive electrode. In the first data writing period t1, a data signal is written to the third driving electrode D3, in the second data writing period t2, a data signal is written to the fourth driving electrode D4, in the third data writing period t3, a data signal is written to the second driving electrode D2, in the fourth data writing period t4, a data signal is written to the fifth driving electrode D5, in the fifth data writing period t5, a data signal is written to the first driving electrode D1, in the sixth data writing period t6, a data signal is written to the sixth driving electrode D6, in the seventh data writing period t7, a data signal is written to the seventh driving electrode D7, in the eighth data writing period t8, a data signal is written to the twelfth driving electrode D12, in the ninth data writing period t9, a data signal is written to the eighth driving electrode D8, in the tenth data writing period t10, a data signal is written to the eleventh driving electrode D11, in the eleventh data writing period t11, a data signal is written to the ninth driving electrode D9, and in the twelfth data writing period t12, a data signal is written to the tenth driving electrode D10.

[0152] In yet another embodiment, Figure 22 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 22 In the embodiment shown, when h is an even number and N is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, In this way, the data writing order of the driving electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternates from the beginning to the end. Then, the data writing time of the first driving electrode is close to the last data writing period in the first sub-group writing period (the second to last data writing period in the first sub-group writing period, i.e., the fifth data writing period t5). The data writing order of the driving electrodes 510 in the second electrode sub-group 522 is from the edge to the center, and alternates from the tail to the beginning. Then, the data writing period of the Nth driving electrode is the first data writing period in the second sub-group writing period (the first data writing period in the second sub-group writing period, that is, the seventh data writing period t7). After the data signals are written to the electrode sub-groups one by one, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (a difference of 2 data writing periods), which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0153] Figure 22 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 12th drive electrode (twelfth drive electrode D12), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0154] Figure 23 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 23 In the embodiment shown, when h is an even number and N is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes, Thus, the data writing order of the driving electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternates from the end to the beginning. Then, the data writing time of the first driving electrode is the last data writing period in the first sub-group writing period (the last data writing period in the first sub-group writing period, i.e., the sixth data writing period t6). The data writing order of the driving electrodes 510 in the second electrode sub-group 522 is from the edge to the center, and alternates from the beginning to the end. Then, the data writing period of the Nth driving electrode is close to the first data writing period in the second sub-group writing period (the second data writing period in the second sub-group writing period, that is, the eighth data writing period t8). After the data signals are written to each electrode sub-group in sequence, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (a difference of 3 data writing periods), which reduces the length of time when the positive and negative voltage difference exists between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0155] Figure 23 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 12th drive electrode (twelfth drive electrode D12), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0156] Figure 24 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 24 In the embodiment shown, when h is an even number and N is an even number, the time sequence for writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, Thus, the data writing order of the driving electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternates from the end to the beginning. Then, the data writing time of the first driving electrode is the last data writing period in the first sub-group writing period (the last data writing period in the first sub-group writing period, i.e., the sixth data writing period t6). The data writing order of the driving electrodes 510 in the second electrode sub-group 522 is from the edge to the center, and alternates from the tail to the beginning. Then the data writing period of the Nth driving electrode is the first data writing period in the second sub-group writing period (the first data writing period in the second sub-group writing period, that is, the seventh data writing period t7). After the data signal is written to each electrode sub-group in sequence, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (a difference of 2 data writing periods), which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0157] For example, Figure 24 Taking N=12 and h=6 as an example, the time order for writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 12th drive electrode (twelfth drive electrode D12), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0158] The above embodiment is described by taking N as an even number and h as an even number as an example, while the following embodiment is described by taking N as an odd number and h as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention will not be described in detail here.

[0159] Figure 25 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 25 In the embodiment shown, N is an odd number, h is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes.

[0160] For example, Figure 25 In the example, N=11 and h=6 are used for explanation, that is, the time sequence for writing data signals to the 11 drive electrodes is: the 3rd drive electrode (the third drive electrode D3), the 4th drive electrode (the fourth drive electrode D4), the 2nd drive electrode (the second drive electrode D2), the 5th drive electrode (the fifth drive electrode D5), the 1st drive electrode (the first drive electrode D1), the 6th drive electrode (the sixth drive electrode D6), the 7th drive electrode (the seventh drive electrode D7), the 11th drive electrode (the 11th drive electrode D11), the 8th drive electrode (the 8th drive electrode D8), the 10th drive electrode (the 10th drive electrode D10), and the 9th drive electrode (the 9th drive electrode D9).

[0161] Figure 26 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 26 In the embodiment shown, when N is an odd number and h is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0162] Figure 26 In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 11th drive electrode (eleventh drive electrode D11), the 7th drive electrode (seventh drive electrode D7), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), and the 9th drive electrode (ninth drive electrode D9).

[0163] Figure 27This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 27 In the embodiment shown, N is an odd number and h is an even number. In the same electrode group 50, the time sequence for writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes.

[0164] Figure 27 In the exemplary embodiment, N=11 and h=6 are used as an example, that is, the time order of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0165] Figure 28 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 28 In the embodiment shown, N is an odd number, h is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0166] Figure 28For example, N=11 and h=6 are used for explanation, that is, the time sequence for writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 11th drive electrode (eleventh drive electrode D11), the 7th drive electrode (seventh drive electrode D7), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), and the 9th drive electrode (ninth drive electrode D9).

[0167] The above embodiment is described by taking N as an odd number and h as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0168] Figure 29 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 29 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes.

[0169] For example, Figure 29 Taking N=12 and h=7 as an example, the time order of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 8th drive electrode (eighth drive electrode D8), the 12th drive electrode (twelfth drive electrode D12), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 10th drive electrode (tenth drive electrode D10).

[0170] Figure 30This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 30 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0171] Figure 30 For example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 12th drive electrode (twelfth drive electrode D12), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0172] Figure 31 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 30 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes.

[0173] Figure 31For example, N=12, h=7 is used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 8th drive electrode (eighth drive electrode D8), the 12th drive electrode (twelfth drive electrode D12), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 10th drive electrode (tenth drive electrode D10).

[0174] Figure 32 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 32 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0175] Figure 32 For example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 12th drive electrode (twelfth drive electrode D12), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0176] The above embodiment is described by taking h as an odd number and N as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an odd number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0177] Figure 33 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 33 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes, driving electrodes.

[0178] Figure 33 For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0179] Figure 34 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 34 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the hth driving electrode, the 1st driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, driving electrodes.

[0180] Figure 34For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0181] Figure 35 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 35 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the h+1th driving electrode, the Nth driving electrode, the h+2th driving electrode, the N-1th driving electrode, ..., the driving electrodes, driving electrodes.

[0182] Figure 35 For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0183] Figure 36 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 36 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the 1st driving electrode, the hth driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, driving electrodes.

[0184] Figure 36 For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0185] Figure 37 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 37 The plurality of electrode subgroups 520 include a first electrode subgroup 521 and a second electrode subgroup 522. During the u-th subgroup write period, data signals are written to the drive electrodes 510 in the first electrode subgroup 521. During the v-th subgroup write period, data signals are written to the drive electrodes 510 in the second electrode subgroup 522. Where v > u, and u and v are positive integers, the first electrode subgroup 521 and the second electrode subgroup 522 constitute a first-type subgroup 50A. Within the same first-type subgroup 50A, data signals are written to the drive electrodes 510 in a sequential manner, alternating from the edge of the first-type subgroup 50A toward the center of the first-type subgroup 50A.

[0186] For example, Figure 37In the illustrated embodiment, M=2, and the two electrode subgroups 520 are the first electrode subgroup 521 and the second electrode subgroup 522. The first electrode subgroup 521 includes the first to h-th drive electrodes. The second electrode subgroup 522 includes the h+1-th to N-th drive electrodes, where h is a positive integer greater than 1. The two subgroup write periods are the first subgroup write period and the second subgroup write period. The first subgroup write period includes the first data write period t1 to the h-th data write period, and the second subgroup write period includes the h+1-th to N-th data write periods. In the first subgroup writing period, the data signal is written to the driving electrode 510 in the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the driving electrode in the second electrode subgroup 522, and when h is an even number and N is an even number, since the first electrode subgroup 521 and the second electrode subgroup 522 are both the first type of subgroup 50A, then in the same electrode group 50, the time sequence of writing the data signal to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrodes, driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes, driving electrodes. Thus, the driving electrodes 510 in the first electrode subgroup 521 and the second electrode subgroup 522 are all written with data signals alternately from edge to center and from beginning to end. The data writing time of the first driving electrode is the first data writing time period in the first subgroup writing time period (the first data writing time period t1 in the first subgroup writing time period). The data writing time period of the Nth driving electrode is close to the first data writing time period in the second subgroup writing time period (the second data writing time period in the second subgroup writing time period). After the data signals are written sequentially to each electrode subgroup, the data writing time periods of the first driving electrode and the last driving electrode in the same electrode group 50 are similar (the difference is 7 data writing time periods, which is less than N-1=11 data writing time periods). In adjacent electrode groups 50, the data writing time periods between the Nth driving electrode in the first electrode group 501 and the first driving electrode in the second electrode group 502 are similar, thereby reducing the duration of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is reversed. In addition, in the first electrode subgroup 521 and the second electrode subgroup 522 , the number of data writing periods in which there is a voltage difference between adjacent driving electrodes 510 is 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0187] Figure 37 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the first drive electrode (first drive electrode D1), the sixth drive electrode (sixth drive electrode D6), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the third drive electrode (third drive electrode D3), the fourth drive electrode (fourth drive electrode D4), the seventh drive electrode (seventh drive electrode D7), the twelfth drive electrode (twelfth drive electrode D12), the eighth drive electrode (eighth drive electrode D8), the eleventh drive electrode (eleventh drive electrode D11), the ninth drive electrode (ninth drive electrode D9), and the tenth drive electrode (tenth drive electrode D10).

[0188] In yet another embodiment, Figure 38 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 38 In the embodiment shown, when h is an even number and N is an even number, in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrodes, driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, In this way, the data writing order for the driving electrodes 510 in the first electrode subgroup 521 is from edge to center, and alternates from beginning to end. The data writing time for the first driving electrode is the first data writing period in the first subgroup writing period (the first data writing period t1 in the first subgroup writing period). The data writing order for the driving electrodes 510 in the second electrode subgroup 522 is from edge to center, and alternates from end to beginning. The data writing period for the Nth driving electrode is the first data writing period in the second subgroup writing period (the first data writing period in the second subgroup writing period, i.e., the seventh data writing period t7). After the data signals are sequentially written to each electrode subgroup, the data writing time for the first and last driving electrodes in the same electrode group 50 is similar (with a difference of six data writing periods). This reduces the duration of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is reversed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0189] Figure 38In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the first drive electrode (first drive electrode D1), the sixth drive electrode (sixth drive electrode D6), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the third drive electrode (third drive electrode D3), the fourth drive electrode (fourth drive electrode D4), the twelfth drive electrode (twelfth drive electrode D12), the seventh drive electrode (seventh drive electrode D7), the eleventh drive electrode (eleventh drive electrode D11), the eighth drive electrode (eighth drive electrode D8), the tenth drive electrode (tenth drive electrode D10), and the ninth drive electrode (ninth drive electrode D9).

[0190] Figure 39 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 39 In the embodiment shown, when h is an even number and N is an even number, in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrodes, driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes, In this way, the data writing order of the driving electrodes 510 in the first electrode subgroup 521 is from edge to center, and alternates from end to beginning. Therefore, the data writing time of the first driving electrode is close to the first data writing period in the first subgroup writing period (the second data writing period t2 in the first subgroup writing period). The data writing order of the driving electrodes 510 in the second electrode subgroup 522 is from edge to center, and alternates from beginning to end. Therefore, the data writing period of the Nth driving electrode is close to the first data writing period in the second subgroup writing period (the second data writing period in the second subgroup writing period, i.e., the eighth data writing period t8). After the data signals are sequentially written to each electrode subgroup, the data writing time of the first driving electrode and the last driving electrode in the same electrode group 50 are close (with a difference of 6 data writing periods). This reduces the duration of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is reversed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0191] Figure 39In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 7th drive electrode (seventh drive electrode D7), the 12th drive electrode (twelfth drive electrode D12), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0192] Figure 40 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 40 In the embodiment shown, when h is an even number and N is an even number, in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrodes, driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes, In this way, the data writing order of the driving electrodes 510 in the first electrode subgroup 521 is from edge to center, and alternates from tail to head. Therefore, the data writing time of the first driving electrode is close to the first data writing period in the first subgroup writing period (the second data writing period t2 in the first subgroup writing period). The data writing order of the driving electrodes 510 in the second electrode subgroup 522 is from edge to center, and alternates from tail to head. Therefore, the data writing period of the Nth driving electrode is the first data writing period in the second subgroup writing period (the first data writing period in the second subgroup writing period, i.e., the seventh data writing period t7). After the data signal is sequentially written to each electrode subgroup, the data writing time of the first driving electrode and the last driving electrode in the same electrode group 50 are close (with a difference of five data writing periods). This reduces the duration of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is reversed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0193] Figure 40In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 12th drive electrode (twelfth drive electrode D12), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0194] The above embodiment is described by taking N as an even number and h as an even number as an example, while the following embodiment is described by taking N as an odd number and h as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention will not be described in detail here.

[0195] Figure 41 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 41 In the embodiment shown, N is an odd number and h is an even number. In the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrodes, driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0196] Figure 41 In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the first drive electrode (first drive electrode D1), the sixth drive electrode (sixth drive electrode D6), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the third drive electrode (third drive electrode D3), the fourth drive electrode (fourth drive electrode D4), the seventh drive electrode (seventh drive electrode D7), the eleventh drive electrode (eleventh drive electrode D11), the eighth drive electrode (eighth drive electrode D8), the tenth drive electrode (tenth drive electrode D10) and the ninth drive electrode (ninth drive electrode D9).

[0197] Figure 42 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 42 In the embodiment shown, when N is an odd number and h is an even number, in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrodes, driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0198] Figure 42 In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the first drive electrode (first drive electrode D1), the sixth drive electrode (sixth drive electrode D6), the second drive electrode (second drive electrode D2), the fifth drive electrode (fifth drive electrode D5), the third drive electrode (third drive electrode D3), the fourth drive electrode (fourth drive electrode D4), the eleventh drive electrode (eleventh drive electrode D11), the seventh drive electrode (seventh drive electrode D7), the tenth drive electrode (tenth drive electrode D10), the eighth drive electrode (eighth drive electrode D8), and the ninth drive electrode (ninth drive electrode D9).

[0199] Figure 43 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 43 In the embodiment shown, N is an odd number and h is an even number. In the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the hth driving electrode. driving electrodes, driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0200] Figure 43In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 7th drive electrode (seventh drive electrode D7), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10) and the 9th drive electrode (ninth drive electrode D9).

[0201] Figure 44 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 44 In the embodiment shown, N is an odd number and h is an even number. In the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the hth driving electrode. driving electrodes, driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0202] Figure 44 In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 11th drive electrode (eleventh drive electrode D11), the 7th drive electrode (seventh drive electrode D7), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), and the 9th drive electrode (ninth drive electrode D9).

[0203] The above embodiment is described by taking N as an odd number and h as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0204] Figure 45 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 45In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0205] Figure 45 In the example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the first drive electrode (first drive electrode D1), the seventh drive electrode (seventh drive electrode D7), the second drive electrode (second drive electrode D2), the sixth drive electrode (sixth drive electrode D6), the third drive electrode (third drive electrode D3), the fifth drive electrode (fifth drive electrode D5), the fourth drive electrode (fourth drive electrode D4), the eighth drive electrode (eighth drive electrode D8), the twelfth drive electrode (twelfth drive electrode D12), the ninth drive electrode (ninth drive electrode D9), the eleventh drive electrode (eleventh drive electrode D11), and the tenth drive electrode (tenth drive electrode D10).

[0206] Figure 46 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 46 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the h-1th driving electrode. driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0207] Figure 46In the example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the first drive electrode (first drive electrode D1), the seventh drive electrode (seventh drive electrode D7), the second drive electrode (second drive electrode D2), the sixth drive electrode (sixth drive electrode D6), the third drive electrode (third drive electrode D3), the fifth drive electrode (fifth drive electrode D5), the fourth drive electrode (fourth drive electrode D4), the twelfth drive electrode (twelfth drive electrode D12), the eighth drive electrode (eighth drive electrode D8), the eleventh drive electrode (eleventh drive electrode D11), and the tenth drive electrode (tenth drive electrode D10).

[0208] Figure 47 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 47 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0209] Figure 47 In the example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 8th drive electrode (eighth drive electrode D8), the 12th drive electrode (twelfth drive electrode D12), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 10th drive electrode (tenth drive electrode D10).

[0210] Figure 48 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 48 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0211] Figure 48 In the example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 12th drive electrode (twelfth drive electrode D12), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0212] The above embodiment is described by taking h as an odd number and N as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an odd number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0213] Figure 49 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 49 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0214] Figure 49In the example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the first drive electrode (first drive electrode D1), the seventh drive electrode (seventh drive electrode D7), the second drive electrode (second drive electrode D2), the sixth drive electrode (sixth drive electrode D6), the third drive electrode (third drive electrode D3), the fifth drive electrode (fifth drive electrode D5), the fourth drive electrode (fourth drive electrode D4), the eighth drive electrode (eighth drive electrode D8), the eleventh drive electrode (eleventh drive electrode D11), the ninth drive electrode (ninth drive electrode D9), and the tenth drive electrode (tenth drive electrode D10).

[0215] Figure 50 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 50 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the first driving electrode, the hth driving electrode, the second driving electrode, the h-1th driving electrode, ..., the driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0216] Figure 50 In the example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the first drive electrode (first drive electrode D1), the seventh drive electrode (seventh drive electrode D7), the second drive electrode (second drive electrode D2), the sixth drive electrode (sixth drive electrode D6), the third drive electrode (third drive electrode D3), the fifth drive electrode (fifth drive electrode D5), the fourth drive electrode (fourth drive electrode D4), the eleventh drive electrode (eleventh drive electrode D11), the eighth drive electrode (eighth drive electrode D8), the tenth drive electrode (tenth drive electrode D10), and the ninth drive electrode (ninth drive electrode D9).

[0217] Figure 51 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 51 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrode, h+1th driving electrode, Nth driving electrode, h+2th driving electrode, N-1th driving electrode, ..., driving electrodes.

[0218] Figure 51 In the example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), and the 10th drive electrode (tenth drive electrode D10).

[0219] Figure 52 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 52 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: the hth driving electrode, the 1st driving electrode, the h-1th driving electrode, the 2nd driving electrode, ..., the driving electrode, the Nth driving electrode, the h+1th driving electrode, the N-1th driving electrode, the h+2th driving electrode, ..., the driving electrodes.

[0220] Figure 52 In the example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), and the 9th drive electrode (ninth drive electrode D9).

[0221] Figure 53 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 53The multiple electrode subgroups 520 include a first electrode subgroup 521 and a second electrode subgroup 522. During the u-th subgroup write period, data signals are written to the drive electrodes 510 in the first electrode subgroup 521. During the v-th subgroup write period, data signals are written to the drive electrodes 510 in the second electrode subgroup 522. (v>u, where u and v are positive integers.) The first electrode subgroup 521 and the second electrode subgroup 522 constitute a third subgroup 50C. Within the same third subgroup 50C, data signals are written to the drive electrodes 510 in a sequential manner, alternating from the center of the third subgroup 50C to the edge of the third subgroup 50C.

[0222] For example, Figure 53 In the embodiment shown, M=2, and the two electrode subgroups 520 are respectively the first electrode subgroup 521 and the second electrode subgroup 522. During the first subgroup writing period, the data signal is written to the driving electrodes 510 in the first electrode subgroup 521, and during the second subgroup writing period, the data signal is written to the driving electrodes 510 in the second electrode subgroup 522. When h is an even number and N is an even number, since the first electrode subgroup 521 and the second electrode subgroup 522 are both the third type subgroup 50C, the time sequence for writing the data signal to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the h+1th driving electrode, and the Nth driving electrode. In this way, the driving electrodes 510 in the first electrode sub-group 521 and the second electrode sub-group 522 are all written with data signals alternately from the center to the edge and from the beginning to the end. Then, the data writing time of the first driving electrode is close to the last data writing period in the first sub-group writing period (the second to last data writing period in the first sub-group writing period, i.e., the fifth data writing period t5). The data writing period for the Nth drive electrode is the last data writing period in the second subgroup writing period (the penultimate data writing period in the second subgroup writing period, i.e., the 12th data writing period t12). After data signals are sequentially written to each electrode subgroup, the data writing time between the first and last drive electrodes in the same electrode group 50 is similar (a difference of 7 data writing periods, less than N-1 = 11 data writing periods). In adjacent electrode groups 50, the data writing time between the Nth drive electrode in the first electrode group 501 and the first drive electrode in the second electrode group 502 is similar, thus reducing the duration of the positive and negative voltage difference between the two closest drive electrodes in adjacent electrode groups 50 after voltage polarity reversal. Furthermore, the number of data writing periods in which a voltage difference exists between adjacent drive electrodes 510 in the first electrode subgroup 521 and the second electrode subgroup 522 is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0223] Figure 53 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 7th drive electrode (seventh drive electrode D7), and the 12th drive electrode (twelfth drive electrode D12).

[0224] In yet another embodiment, Figure 54 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 54 In the embodiment shown, when h is an even number and N is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode. Thus, the data writing order of the driving electrodes 510 in the first electrode subgroup 521 is from the center to the edge, and alternates from the beginning to the end. Therefore, the data writing time of the first driving electrode is close to the last data writing period in the first subgroup writing period (the second to last data writing period in the first subgroup writing period, i.e., the fifth data writing period t5). The data writing order of the driving electrodes 510 in the second electrode sub-group 522 is from the center to the edge, and alternates from the tail to the beginning. Then, the data writing period of the Nth driving electrode is close to the last data writing period in the second sub-group writing period (the second to last data writing period in the second sub-group writing period, the 11th data writing period t11). After the data signals are written to each electrode sub-group in sequence, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (a difference of 6 data writing periods), which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0225] Figure 54 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 12th drive electrode (twelfth drive electrode D12), and the 7th drive electrode (seventh drive electrode D7).

[0226] Figure 55 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 55 In the embodiment shown, when h is an even number and N is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the h+1th driving electrode, and the Nth driving electrode. Thus, the data writing order of the driving electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternately from the end to the beginning. Therefore, the data writing time of the first driving electrode is the last data writing period in the first sub-group writing period (the last data writing period in the first sub-group writing period, i.e., the sixth data writing period t6). The data writing order of the driving electrodes 510 in the second electrode sub-group 522 is from the center to the edge, and alternates from the beginning to the end. Then, the data writing period of the Nth driving electrode is the last data writing period in the second sub-group writing period (the last data writing period in the second sub-group writing period, that is, the 12th data writing period t12). After the data signals are written to the electrode sub-groups one by one, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (the difference is 6 data writing periods), which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0227] Figure 55 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), the 7th drive electrode (seventh drive electrode D7), and the 12th drive electrode (twelfth drive electrode D12).

[0228] Figure 56 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 56 In the embodiment shown, when h is an even number and N is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, drive electrodes, ..., the Nth drive electrode, the h+1th drive electrode. In this way, the data writing order of the drive electrodes 510 in the first electrode sub-group 521 is from the center to the edge, and alternates from the end to the beginning. Then, the data writing time of the first drive electrode is the last data writing period in the first sub-group writing period (the penultimate data writing period in the first sub-group writing period, i.e., the sixth data writing period t6). The data writing order of the drive electrodes 510 in the second electrode sub-group 522 is from the center to the edge, and alternates from the end to the beginning. Then, the data writing period of the Nth drive electrode is close to the last data writing period in the second sub-group writing period (the penultimate data writing period in the second sub-group writing period, i.e., the 11th data writing period t11). After writing data signals to each electrode sub-group in sequence, in the same electrode group 50, the data writing time of the first driving electrode and the last driving electrode is similar (a difference of 5 data writing periods), which reduces the length of time that there is a positive and negative voltage difference between the two driving electrodes closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image displayed by the liquid crystal grating projection.

[0229] Figure 56 In the example, N=12 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), the 12th drive electrode (twelfth drive electrode D12), and the 7th drive electrode (seventh drive electrode D7).

[0230] The above embodiment is described by taking N as an even number and h as an even number as an example, while the following embodiment is described by taking N as an odd number and h as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention will not be described in detail here.

[0231] Figure 57 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 25 In the embodiment shown, N is an odd number, h is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0232] Figure 57 For example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), and the 7th drive electrode (seventh drive electrode D7).

[0233] Figure 58 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 58 In the embodiment shown, when N is an odd number and h is an even number, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0234] Figure 58In the example, N=11 and h=6 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 3rd drive electrode (third drive electrode D3), the 4th drive electrode (fourth drive electrode D4), the 2nd drive electrode (second drive electrode D2), the 5th drive electrode (fifth drive electrode D5), the 1st drive electrode (first drive electrode D1), the 6th drive electrode (sixth drive electrode D6), the 9th drive electrode (ninth drive electrode D9), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), the 7th drive electrode (seventh drive electrode D7), and the 11th drive electrode (eleventh drive electrode D11).

[0235] Figure 59 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 59 In the embodiment shown, N is an odd number, h is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0236] Figure 59 In the exemplary embodiment, N=11 and h=6 are used as an example, that is, the time order of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), the 11th drive electrode (eleventh drive electrode D11), and the 7th drive electrode (seventh drive electrode D7).

[0237] Figure 60 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 60 In the embodiment shown, N is an odd number, h is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0238] Figure 60 For example, N=11 and h=6 are used for explanation, that is, the time sequence for writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 9th drive electrode (ninth drive electrode D9), the 8th drive electrode (eighth drive electrode D8), the 10th drive electrode (tenth drive electrode D10), the 7th drive electrode (seventh drive electrode D7), and the 11th drive electrode (eleventh drive electrode D11).

[0239] The above embodiment is described by taking N as an odd number and h as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an even number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0240] Figure 61 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 61 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0241] Figure 61In the example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), the 12th drive electrode (twelfth drive electrode D12), and the 8th drive electrode (eighth drive electrode D8).

[0242] Figure 62 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 62 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0243] Figure 62 For example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 8th drive electrode (eighth drive electrode D8).

[0244] Figure 63 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 63 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0245] Figure 63 For example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 11th drive electrode (eleventh drive electrode D11), the 9th drive electrode (ninth drive electrode D9), the 12th drive electrode (twelfth drive electrode D12), and the 8th drive electrode (eighth drive electrode D8).

[0246] Figure 64 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 64 In the embodiment shown, h is an odd number, N is an even number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0247] Figure 64For example, N=12 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), the 8th drive electrode (eighth drive electrode D8), and the 12th drive electrode (twelfth drive electrode D12).

[0248] The above embodiment is described by taking h as an odd number and N as an even number as an example, and the following embodiment is described by taking h as an odd number and N as an odd number as an example. It should be noted that the following embodiment has the same beneficial effects as the above embodiment, and the embodiments of the present invention are not repeated here one by one.

[0249] Figure 65 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 65 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0250] Figure 65 For example, N=11, h=7 is used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), and the 11th drive electrode (eleventh drive electrode D11).

[0251] Figure 66 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 66 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the hth driving electrode, the 1st driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0252] Figure 66 For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 3rd drive electrode (third drive electrode D3), the 6th drive electrode (sixth drive electrode D6), the 2nd drive electrode (second drive electrode D2), the 7th drive electrode (seventh drive electrode D7), the 1st drive electrode (first drive electrode D1), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 8th drive electrode (eighth drive electrode D8).

[0253] Figure 67 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 67 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., h+1th driving electrodes, and Nth driving electrodes.

[0254] Figure 67For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 8th drive electrode (eighth drive electrode D8), and the 11th drive electrode (eleventh drive electrode D11).

[0255] Figure 68 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 68 In the embodiment shown, h is an odd number, N is an odd number, and in the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, driving electrodes, driving electrodes, ..., the first driving electrode, the hth driving electrode, the driving electrodes, driving electrodes, driving electrodes, driving electrode, ..., the Nth driving electrode, and the h+1th driving electrode.

[0256] Figure 68 For example, N=11 and h=7 are used for explanation, that is, the time sequence of writing data signals to the 11 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 5th drive electrode (fifth drive electrode D5), the 2nd drive electrode (second drive electrode D2), the 6th drive electrode (sixth drive electrode D6), the 1st drive electrode (first drive electrode D1), the 7th drive electrode (seventh drive electrode D7), the 10th drive electrode (tenth drive electrode D10), the 9th drive electrode (ninth drive electrode D9), the 11th drive electrode (eleventh drive electrode D11), and the 8th drive electrode (eighth drive electrode D8).

[0257] Figure 69 This is another timing diagram of data writing to a driving electrode provided by an embodiment of the present invention. Figure 69The plurality of electrode subgroups 520 include a first electrode subgroup 521 and a second electrode subgroup 522. During the u-th subgroup write period, data signals are written to the drive electrodes 510 in the first electrode subgroup 521. During the v-th subgroup write period, data signals are written to the drive electrodes 510 in the second electrode subgroup 522. Where v>u, and u and v are positive integers, the first electrode subgroup 521 and the second electrode subgroup 522 constitute a second-type subgroup 50B. Within the same second-type subgroup 50B, data signals are written to the drive electrodes 510 one by one, starting from the first drive electrode in the second-type subgroup 50B to the last drive electrode in the second-type subgroup 50B.

[0258] For example, Figure 69 In the embodiment shown, M=2, and the two electrode subgroups 520 are the first electrode subgroup 521 and the second electrode subgroup 522. When N is an even number, the first electrode subgroup 521 includes the second electrode subgroup 522. driving electrodes to the Nth driving electrodes, the The first driving electrode of the first electrode subgroup 521 is the first driving electrode. The second electrode subgroup 522 includes the first driving electrode of the first electrode subgroup 521. driving electrode to the first driving electrode, wherein the The first driving electrode is the first driving electrode of the second electrode subgroup 522. In the first subgroup writing period, the data signal is written to the driving electrode 510 in the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the driving electrode in the second electrode subgroup 522. When N is an even number, since the first electrode subgroup 521 and the second electrode subgroup 522 are both the second type of subgroup 50B, the time sequence of writing data signals to the N driving electrodes 510 in the same electrode group 50 is: driving electrodes, driving electrodes, ..., the Nth driving electrodes, the driving electrodes, driving electrodes, ..., the 1st driving electrode. Thus, the Nth driving electrode is the last driving electrode in the 1st electrode subgroup 521, and a data signal is written to the Nth driving electrode in the last data writing period of the 1st subgroup writing period. The 1st driving electrode is the last driving electrode in the 2nd electrode subgroup 522, and a data signal is written to the Nth driving electrode in the last data writing period of the 2nd subgroup writing period. After the data signals are sequentially written to each electrode subgroup, the data writing time of the first driving electrode and the last driving electrode in the same electrode group 50 is similar (the difference is 5 data writing periods, which is less than N-1=11 data writing periods). In adjacent electrode groups 50, the data writing time between the Nth driving electrode in the first electrode group 501 and the 1st driving electrode in the second electrode group 502 is similar, which reduces the length of time that a positive and negative voltage difference exists between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is changed, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0259] Figure 69 In the example, N=12 is used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 6th drive electrode (sixth drive electrode D6), the 7th drive electrode (seventh drive electrode D7), the 8th drive electrode (eighth drive electrode D8), the 9th drive electrode (9th drive electrode D9), the 10th drive electrode (10th drive electrode D10), the 11th drive electrode (11th drive electrode D11), the 12th drive electrode (12th drive electrode D12), the 5th drive electrode (fifth drive electrode D5), the 6th drive electrode (sixth drive electrode D6), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 2nd drive electrode (second drive electrode D2), and the 1st drive electrode (first drive electrode D1).

[0260] In yet another embodiment, Figure 70 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 70 In the embodiment shown, N is an even number, and the first electrode subgroup 521 includes the first driving electrodes to the Nth driving electrodes, the The first driving electrode of the first electrode subgroup 521 is the first driving electrode. The second electrode subgroup 522 includes the first driving electrode of the first electrode subgroup 521. driving electrode to the first driving electrode, wherein the The first driving electrode of the second electrode subgroup 522 is the first driving electrode. In the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, ..., the Nth driving electrodes, the driving electrodes, driving electrodes, ..., the first driving electrode. In this way, after the data signal is sequentially written to each electrode sub-group, in the same electrode group 50, the data writing time between the first driving electrode and the last driving electrode is similar (the difference is 6 data writing periods, which is less than N-1=11 data writing periods). In adjacent electrode groups 50, the data writing time between the Nth driving electrode of the first electrode group 501 and the first driving electrode of the second electrode group 502 is similar, which reduces the time length of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is converted, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0261] Figure 70 In the example, N=12 is used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 7th drive electrode (seventh drive electrode D7), the 8th drive electrode (eighth drive electrode D8), the 9th drive electrode (ninth drive electrode D9), the 10th drive electrode (tenth drive electrode D10), the 11th drive electrode (eleventh drive electrode D11), the 12th drive electrode (twelfth drive electrode D12), the 6th drive electrode (sixth drive electrode D6), the 5th drive electrode (fifth drive electrode D5), the 6th drive electrode (sixth drive electrode D6), the 4th drive electrode (fourth drive electrode D4), the 3rd drive electrode (third drive electrode D3), the 2nd drive electrode (second drive electrode D2), and the 1st drive electrode (first drive electrode D1).

[0262] Figure 71 This is another data writing timing diagram of a driving electrode provided by an embodiment of the present invention. Figure 71 In the embodiment shown, N is an odd number, and the first electrode subgroup 521 includes the first driving electrodes to the Nth driving electrodes, the The first driving electrode of the first electrode subgroup 521 is the first driving electrode. The second electrode subgroup 522 includes the first driving electrode of the first electrode subgroup 521. driving electrode to the first driving electrode, wherein the The first driving electrode of the second electrode subgroup 522 is the first driving electrode. In the same electrode group 50, the time sequence of writing data signals to the N driving electrodes 510 is: driving electrodes, driving electrodes, ..., the Nth driving electrodes, the driving electrodes, driving electrodes, ..., the first driving electrode. In this way, after the data signal is sequentially written to each electrode sub-group, in the same electrode group 50, the data writing time between the first driving electrode and the last driving electrode is similar (the difference is 3 data writing periods, which is less than N-1=6 data writing periods). In adjacent electrode groups 50, the data writing time between the Nth driving electrode of the first electrode group 501 and the first driving electrode of the second electrode group 502 is similar, which reduces the time length of the positive and negative voltage difference between the two closest driving electrodes in adjacent electrode groups 50 after the voltage polarity is converted, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0263] Figure 71 In the example, N=7 is used for explanation, that is, the time sequence of writing data signals to the 12 drive electrodes is: the 4th drive electrode (fourth drive electrode D4), the 5th drive electrode (fifth drive electrode D5), the 6th drive electrode (sixth drive electrode D6), the 7th drive electrode (seventh drive electrode D7), the 3rd drive electrode (third drive electrode D3), the 2nd drive electrode (second drive electrode D2), and the 1st drive electrode (first drive electrode D1).

[0264] Figure 72 This is a timing diagram of data writing of an electrode subgroup provided by an embodiment of the present invention. Figure 72 , M>2. In the same electrode group 50, during the p-th subgroup write period, data signals are written to the driving electrodes 510 in the first electrode subgroup 521, and during the q-th subgroup write period, data signals are written to the driving electrodes 510 in the M-th electrode subgroup. p and q are not equal, and the difference between p and q is less than M-1. Here, 1≤p≤M, 1≤q≤M, and p and q are positive integers.

[0265] Specifically, in the M electrode sub-groups 520 of the same electrode group 50, data signals are written to the M electrode sub-groups 520 during the M sub-group write time periods, and data signals are written to any two electrode sub-groups 520 during different sub-group write time periods. In other words, in the M sub-group write time periods, data signals are written to the M electrode sub-groups 520 one by one during the sub-group write time periods. The sub-group write time periods in which the data signals are written to each electrode sub-group 520 are different. When a data signal is written to the first electrode sub-group 521 during the first sub-group write time period, and when a data signal is written to the Mth electrode sub-group during the Mth sub-group write time period, the difference between p and q is equal to M-1. Therefore, in order to ensure that the difference between p and q is less than M-1, it means that a data signal is not written to the first electrode sub-group 521 during the first sub-group write time period, and / or a data signal is not written to the Mth electrode sub-group during the Nth sub-group write time period. Similarly, a data signal is not written to the Mth electrode subgroup during the first subgroup write period, and / or a data signal is not written to the first electrode subgroup 521 during the last subgroup write period. In this way, the difference in the number of data write periods between the first electrode subgroup 521 and the Mth electrode subgroup in the same electrode group 50 is less than M-1. Then, in adjacent electrode groups 50, the difference in the number of subgroup write periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is less than M-1. This reduces the length of time that a positive and negative voltage difference exists between the two closest driving electrodes between adjacent electrode groups after voltage polarity conversion, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0266] On the basis of the above embodiment, continue to refer to Figure 72 In the same electrode group 50, data signals are written to the electrode subgroups 520 in sequence, alternating from the edge of the electrode group 50 to the center of the electrode group 50, and from the beginning to the end. The edge of the electrode group 50 can be understood as the first electrode subgroup (the first electrode subgroup 521) or the last electrode subgroup (the Mth electrode subgroup) of the electrode group 50. The center of the electrode group 50 can be understood as the electrode subgroup 520 in the central area of ​​the electrode group 50. When the electrode group 50 includes an even number of electrode subgroups 520, the center of the electrode group 50 includes two electrode subgroups 520. When the electrode group 50 includes an odd number of electrode subgroups 520, the center of the electrode group 50 includes one electrode subgroup 520.

[0267] For example, Figure 72In the embodiment shown, one electrode group 50 includes six electrode subgroups 520, and the six electrode subgroups 520 are respectively the first electrode subgroup 521, the second electrode subgroup 522, the third electrode subgroup 523, the fourth electrode subgroup 524, the fifth electrode subgroup 525, and the sixth electrode subgroup 526. During the first subgroup write period, the data signal is written to the first electrode subgroup 521, and during the second subgroup write period, the data signal is written to the M-th electrode subgroup. When the electrode group 50 includes an even number of electrode subgroups 520 (M is an even number), the time sequence for writing the data signals to the M electrode subgroups is: the first electrode subgroup, the M-th electrode subgroup, the second electrode subgroup, the M-1-th electrode subgroup, ..., the M-2-th electrode subgroup. Electrode subgroups, Electrode subgroups. Thus, the difference in the number of subgroup writing periods between the first electrode subgroup 521 and the Mth electrode subgroup in the same electrode group 50 is 1. In adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is 1. This reduces the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, because data signals are written to the electrode subgroups 520 in an alternating manner, the adjacent subgroup writing periods at the center of the electrode group 50 are each used to write data signals to the adjacent electrode subgroups. Except for the center of the electrode group 50, the number of subgroup writing periods in which a voltage difference exists between adjacent electrode subgroups 520 at other locations is two. In other words, in the same electrode group 50, the number of data writing periods in which a voltage difference exists between adjacent electrode subgroups 520 is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0268] like Figure 72 In the embodiment shown, taking M=6 as an example, the time sequence for writing data signals to the six electrode subgroups is: the first electrode subgroup 521, the sixth electrode subgroup 526, the second electrode subgroup 522, the fifth electrode subgroup 525, the third electrode subgroup 523, and the fourth electrode subgroup 524.

[0269] For example, the first electrode sub-group 521 includes a first drive electrode D1, a second drive electrode D2, a third drive electrode D3, and a fourth drive electrode D4. The second electrode sub-group 522 includes a fifth drive electrode D5, a sixth drive electrode D6, a seventh drive electrode D7, and an eighth drive electrode D8. The third electrode sub-group 523 includes a ninth drive electrode D9, a tenth drive electrode D10, an eleventh drive electrode D11, and a twelfth drive electrode D12. The fourth electrode sub-group 524 includes a thirteenth drive electrode D13, a fourteenth drive electrode D14, a fifteenth drive electrode D15, and a sixteenth drive electrode D16. The fifth electrode sub-group 525 includes a seventeenth drive electrode D17, an eighteenth drive electrode D18, a nineteenth drive electrode D19, and a twentieth drive electrode D20. The sixth electrode sub-group 526 includes a twenty-first drive electrode D21, a twenty-second drive electrode D22, a twenty-third drive electrode D23, and a twenty-fourth drive electrode D24.

[0270] For example, in the first data writing period t1, a data signal is written to the second driving electrode D2, in the second data writing period t2, a data signal is written to the third driving electrode D3, in the third data writing period t3, a data signal is written to the first driving electrode D1, and in the fourth data writing period t4, a data signal is written to the fourth driving electrode D4. In the fifth data writing period t5, a data signal is written to the twenty-second driving electrode D22, in the sixth data writing period t6, a data signal is written to the twenty-third driving electrode D23, in the seventh data writing period t7, a data signal is written to the twenty-first driving electrode D21, in the eighth data writing period t8, a data signal is written to the twenty-fourth driving electrode D24, in the ninth data writing period t9, a data signal is written to the sixth driving electrode D6, in the tenth data writing period t10, a data signal is written to the seven-first driving electrode D7, in the eleventh data writing period t11, a data signal is written to the fifth driving electrode D5, and in the twelfth data writing period t12, a data signal is written to the eighth driving electrode D8. In the 13th data writing period t13, a data signal is written to the 18th driving electrode D18, in the 14th data writing period t14, a data signal is written to the 19th driving electrode D19, in the 15th data writing period t15, a data signal is written to the 17th driving electrode D17, and in the 16th data writing period t16, a data signal is written to the 20th driving electrode D20. In the 17th data writing period t17, a data signal is written to the 10th driving electrode D10, in the 18th data writing period t18, a data signal is written to the 11th driving electrode D11, in the 19th data writing period t19, a data signal is written to the 9th driving electrode D9, and in the 20th data writing period t20, a data signal is written to the 12th driving electrode D12. In the 21st data writing period t21, the data signal is written to the fourteenth driving electrode D14, in the 22nd data writing period t22, the data signal is written to the fifteenth driving electrode D15, in the 23rd data writing period t23, the data signal is written to the thirteenth driving electrode D13, and in the 24th data writing period t24, the data signal is written to the sixteenth driving electrode D16.

[0271] It is understandable that Figure 72 The present invention is only described in one embodiment by way of example, but is not intended to be limiting. Other embodiments are described below with reference to the accompanying drawings.

[0272] Figure 73 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 73In the embodiment shown, in the first subgroup writing period, the data signal is written to the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the Mth electrode subgroup, and the electrode group 50 includes an even number of electrode subgroups 520 (M is an even number), the time sequence of writing the data signals to the M electrode subgroups is: the Mth electrode subgroup, the 1st electrode subgroup, the M-1th electrode subgroup, the 2nd electrode subgroup, ..., the Electrode subgroups, Electrode subgroups. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is 1. This reduces the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0273] Figure 73 Taking M=6 as an example, the time sequence for writing data signals to the six electrode subgroups is: the sixth electrode subgroup 526, the first electrode subgroup 521, the fifth electrode subgroup 525, the second electrode subgroup 522, the fourth electrode subgroup 524, and the third electrode subgroup 523.

[0274] Figure 74 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 74 In the embodiment shown, in the first subgroup writing period, the data signal is written to the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the M-th electrode subgroup, and the electrode group 50 includes an odd number of electrode subgroups 520 (M is an odd number), the time sequence of writing the data signals to the M electrode subgroups is: the first electrode subgroup, the M-th electrode subgroup, the second electrode subgroup, the M-1-th electrode subgroup, ..., the Electrode subgroups. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is 1. This reduces the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0275] Figure 74The example of M=5 is used for explanation, that is, the time sequence of writing data signals to the five electrode subgroups is: the first electrode subgroup 521, the fifth electrode subgroup 525, the second electrode subgroup 522, the fourth electrode subgroup 524, and the third electrode subgroup 523.

[0276] Figure 75 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 75 In the embodiment shown, in the first subgroup writing period, the data signal is written to the first electrode subgroup 521, and in the second subgroup writing period, the data signal is written to the Mth electrode subgroup, and the electrode group 50 includes an odd number of electrode subgroups 520 (M is an odd number), the time sequence of writing the data signals to the M electrode subgroups is: the Mth electrode subgroup, the 1st electrode subgroup, the M-1th electrode subgroup, the 2nd electrode subgroup, ..., the Electrode subgroups. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is one. This reduces the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after voltage polarity conversion. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups is one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0277] Figure 75 The example of M=5 is used for explanation, that is, the time sequence of writing data signals to the five electrode subgroups is: the fifth electrode subgroup 525, the first electrode subgroup 521, the fourth electrode subgroup 524, the second electrode subgroup 522, and the third electrode subgroup 523.

[0278] It should be noted that the embodiment of the present invention is merely described by way of example in which the plurality of electrode subgroups 520 are all third-type subgroups 50C, but the invention is not limited thereto. In other embodiments, the plurality of electrode subgroups 520 may include at least one of the first-type subgroup 50A or the third-type subgroup 50C. In the same first-type subgroup 50A, data signals are sequentially written to the driving electrodes 510 from the edge of the first-type subgroup 50A toward the center of the first-type subgroup 50A, alternating from beginning to end. In the same third-type subgroup 50C, data signals are sequentially written to the driving electrodes 510 from the center of the third-type subgroup 50C toward the edge of the third-type subgroup 50C, alternating from beginning to end.

[0279] Figure 76 This is a timing diagram of data writing of another electrode subgroup provided by an embodiment of the present invention. Figure 76In the same electrode group 50 , data signals are written into the electrode sub-groups 520 in sequence from the center of the electrode group 50 to the edge of the electrode group 50 , alternating from beginning to end.

[0280] For example, Figure 76 In the embodiment shown, in the 5th (M-1) data writing period, the data signal is written to the 1st driving electrode, and in the 6th (M) data writing period, the data signal is written to the Mth driving electrode, and the electrode group 50 includes an even number of electrode sub-groups (M is an even number), in the same electrode group 50, the time sequence of writing data signals to the M electrode sub-groups is: Electrode subgroups, Electrode subgroups, Electrode subgroups, electrode subgroups, ..., the 1st electrode subgroup, the Mth electrode subgroup. In this way, the difference in the number of subgroup writing time periods between the 1st electrode subgroup 521 and the Mth electrode subgroup in the same electrode group 50 is 1, and in adjacent electrode groups 50, the difference in the number of subgroup writing time periods between the Mth electrode subgroup of the first electrode group 501 and the 1st electrode subgroup 521 of the second electrode group 502 is 1, which reduces the length of time that there is a positive and negative voltage difference between the two electrode subgroups closest to each other in the adjacent electrode groups 50 after the voltage polarity is changed. In addition, in the same electrode group 50, since data signals are written to the electrode subgroups 520 in an alternating manner, the data signals are written to the adjacent electrode subgroups in the adjacent subgroup writing time periods at the center of the electrode group 50. Except for the center of the electrode group 50, the number of subgroup writing time periods in which there is a voltage difference between adjacent electrode subgroups at other positions is 2. In other words, in the same electrode group 50 , the number of data writing periods in which there is a voltage difference between adjacent electrode subgroups is 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0281] Figure 76 The example of M=6 is used for illustration, that is, the time sequence of writing data signals to the 6 electrode subgroups is: the 3rd electrode subgroup 523, the 4th electrode subgroup 524, the 2nd electrode subgroup 522, the 5th electrode subgroup 525, the 1st electrode subgroup 521, and the 6th electrode subgroup 526.

[0282] It is understandable that Figure 76 The present invention is only described in one embodiment by way of example, but is not intended to be limiting. Other embodiments are described below with reference to the accompanying drawings.

[0283] Figure 77 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 77In the embodiment shown, in the 5th (M-1) data writing period, the data signal is written to the 1st driving electrode, and in the 6th (M) data writing period, the data signal is written to the Mth driving electrode, and the electrode group 50 includes an even number of electrode sub-groups 520 (M is an even number), in the same electrode group 50, the time sequence of writing data signals to the M electrode sub-groups is: Electrode subgroups, Electrode subgroups, Electrode subgroups, electrode subgroups, ..., the Mth electrode subgroup, and the 1st electrode subgroup. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the 1st electrode subgroup 521 of the second electrode group 502 is 1, reducing the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups 520 is either 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0284] Figure 77 The example of M=6 is used for illustration, that is, the time sequence of writing data signals to the 6 electrode subgroups is: the 4th electrode subgroup 524, the 3rd electrode subgroup 523, the 5th electrode subgroup 525, the 2nd electrode subgroup 522, the 6th electrode subgroup 526, and the 1st electrode subgroup 521.

[0285] Figure 78 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 78 In the embodiment shown, in the 4th (M-1) data writing period, the data signal is written to the 1st driving electrode, and in the 5th (M) data writing period, the data signal is written to the Mth driving electrode, and the electrode group 50 includes an odd number of electrode sub-groups 520 (M is an odd number), in the same electrode group 50, the time sequence of writing data signals to the M electrode sub-groups is: Electrode subgroups, Electrode subgroups, Electrode subgroups, electrode subgroups, ..., the Mth electrode subgroup, and the 1st electrode subgroup. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the 1st electrode subgroup 521 of the second electrode group 502 is 1, reducing the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups is either 1 or 2, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0286] Figure 78 For example, M=5 is used for explanation, that is, the time sequence of writing data signals to the five electrode subgroups is: the third electrode subgroup 523, the fourth electrode subgroup 524, the second electrode subgroup 522, the fifth electrode subgroup 525, and the first electrode subgroup 521.

[0287] Figure 79 This is another data writing timing diagram of an electrode subgroup provided by an embodiment of the present invention. Figure 79 In the embodiment shown, in the 4th (M-1) data writing period, the data signal is written to the 1st driving electrode, and in the 5th (M) data writing period, the data signal is written to the Mth driving electrode, and the electrode group 50 includes an odd number of electrode sub-groups 520 (M is an odd number), in the same electrode group 50, the time sequence of writing data signals to the M electrode sub-groups is: Electrode subgroups, Electrode subgroups, Electrode subgroups, electrode subgroups, ..., the 1st electrode subgroup, the Mth electrode subgroup. Thus, in adjacent electrode groups 50, the difference in the number of subgroup writing periods between the Mth electrode subgroup of the first electrode group 501 and the first electrode subgroup 521 of the second electrode group 502 is 1. This reduces the duration of the positive and negative voltage difference between the two closest electrode subgroups in adjacent electrode groups 50 after the voltage polarity is reversed. Furthermore, in the same electrode group 50, the number of data writing periods during which a voltage difference exists between adjacent electrode subgroups is either one or two, thereby improving the uniformity of the image projected and displayed by the liquid crystal grating.

[0288] Figure 79 For example, M=5 is used for explanation, that is, the time sequence of writing data signals to the five electrode subgroups is: the third electrode subgroup 523, the second electrode subgroup 522, the fourth electrode subgroup 524, the first electrode subgroup 521, and the fifth electrode subgroup 525.

[0289] It should be noted that the embodiment of the present invention is merely described by way of example in which the plurality of electrode subgroups 520 are all third-type subgroups 50C, but the invention is not limited thereto. In other embodiments, the plurality of electrode subgroups 520 may include at least one of the first-type subgroup 50A or the third-type subgroup 50C. In the same first-type subgroup 50A, data signals are sequentially written to the driving electrodes 510 from the edge of the first-type subgroup 50A toward the center of the first-type subgroup 50A, alternating from beginning to end. In the same third-type subgroup 50C, data signals are sequentially written to the driving electrodes 510 from the center of the third-type subgroup 50C toward the edge of the third-type subgroup 50C, alternating from beginning to end.

[0290] Figure 80 This is a circuit structure diagram of a liquid crystal grating provided by an embodiment of the present invention. Figure 80 The liquid crystal grating further includes a multiplexer circuit 60 and a source line 70. The multiplexer circuit 60 includes an input terminal and N output terminals. The input terminal is electrically connected to the source line 70, and the N output terminals are electrically connected to the N driving electrodes in the same electrode group 50 in a one-to-one correspondence. The multiplexer circuit 60 is used to electrically connect one of the N output terminals to the source line 70 during a data writing period.

[0291] like Figure 80 In the embodiment shown, an electrode group 50 includes 6 driving electrodes arranged in sequence from left to right, and the 6 driving electrodes arranged in sequence are respectively a first driving electrode D1, a second driving electrode D2, a third driving electrode D3, a fourth driving electrode D4, a fifth driving electrode D5 and a sixth driving electrode D6. The multiplexing circuit 60 includes 6 transistors, the input ends of the 6 transistors are electrically connected to the source line 70, the output ends of the 6 transistors are respectively electrically connected to the 6 driving electrodes in the same electrode group 50 in a one-to-one correspondence, and the control ends of the 6 transistors are respectively electrically connected to the 6 control signal output ends in a one-to-one correspondence. In this way, one of the 6 output ends is controlled to be connected to the source line 70 through the control signal output end, so that the source line 70 writes a data signal to the corresponding driving electrode 510. For example, as Figure 80 In the illustrated embodiment, the first control signal output terminal Mux1 corresponds to the first drive electrode D1, the second control signal output terminal Mux2 corresponds to the second drive electrode D2, the third control signal output terminal Mux3 corresponds to the third drive electrode D3, the fourth control signal output terminal Mux4 corresponds to the fourth drive electrode D4, the fifth control signal output terminal Mux5 corresponds to the fifth drive electrode D5, and the sixth control signal output terminal Mux6 corresponds to the sixth drive electrode D6. During a data writing period, the first control signal output terminal Mux1 outputs a conduction signal, turning on the corresponding transistor so that the source line 70 writes a data signal to the first drive electrode D1.

[0292] It should be noted that adjacent source lines include a first source line 710 and a second source line 720, and adjacent electrode groups 50 include a first electrode group 501 and a second electrode group 502. The first source line 710 writes data signals to the first electrode group 501, and the second source line 720 writes data signals to the second electrode group 502. The driving electrodes 510 at the same position in different electrode groups 50 write data signals during the same data writing period.

[0293] Figure 81 This is a timing diagram of a multi-way selection circuit provided by an embodiment of the present invention. Figure 81 At least part of the working period includes a first period S1 and a second period S2, the first period S1 includes the first stage, and the second period S2 includes the first stage. The voltage polarity of the data signal in the first period S1 is opposite to the voltage polarity of the data signal in the second period S2.

[0294] See also Figure 4 、 Figure 80 and Figure 81The second period S2 includes a first stage. During the first period S1, the voltage polarity provided by the source line 70 is positive. For example, a 1V data signal is written to the first drive electrode D1, a 2V data signal is written to the second drive electrode D2, a 3V data signal is written to the third drive electrode D3, a 4V data signal is written to the fourth drive electrode D4, a 5V data signal is written to the fifth drive electrode D5, and a 6V data signal is written to the sixth drive electrode D6. During the second period S2, the voltage polarity provided by the source line 70 is negative. During the first data write period t1 of the second period S2, the first control signal output terminal Mux1 is at a low level, writing the -1V data signal on the source line 70 to the first drive electrode D1. During the second data write period t2 of the second period S2, the fourth control signal output terminal Mux4 is at a low level, writing the -4V data signal on the source line 70 to the fourth drive electrode D4. During the third data write period t3 within the second period S2, the second control signal output terminal Mux2 is at a low level, and a -2V data signal on the source line 70 is written to the second drive electrode D2. During the fourth data write period t4 within the second period S2, the third control signal output terminal Mux3 is at a low level, and a -3V data signal on the source line 70 is written to the third drive electrode D3. During the fifth data write period t5 within the second period S2, the sixth control signal output terminal Mux6 is at a low level, and a -6V data signal on the source line 70 is written to the sixth drive electrode D6. During the sixth data write period t6 within the second period S2, the fifth control signal output terminal Mux5 is at a low level, and a -5V data signal on the source line 70 is written to the fifth drive electrode D5. Thus, the voltage polarity on each drive electrode is reversed. It will be understood that since the first period S1 includes a first stage, the first period S1 can complete the voltage polarity reversal on each drive electrode in a manner similar to the second period S2, compared to the period before the first period S1. The sixth data writing period t6 in the first period S1 is relative to the second period S2 and serves as the “data writing period t0” of the second period S2.

[0295] Figure 82 This is a timing diagram of another multi-way selection circuit provided by an embodiment of the present invention. Figure 82 At least part of the working period includes a first period S1, the first period S1 includes a plurality of writing sub-periods S10, and the first writing sub-period S10 includes a first stage.

[0296] Exemplarily, the first period S1 includes two writing sub-periods S10, namely a first writing sub-period S11 and a second writing sub-period S12. The first writing sub-period S11 precedes the second writing sub-period S12. The first writing sub-period S11 is the first writing sub-period S10 in the first period S1, and the second writing sub-period S12 is the second writing sub-period S10 in the first period S1. Because there is a longer positive-negative voltage difference between the first writing sub-period S11 and the previous period, the data signal is written to the drive electrode in the first writing sub-period S11 according to the timing of the first stage. In the second writing sub-period S12, which follows the first writing sub-period S11, the voltage polarity of the data signal in the second writing sub-period S12 is the same as the voltage polarity of the data signal in the first writing sub-period S11, because the voltage polarity transformation on each drive electrode has already been completed in the first writing sub-period S11. The time sequence for writing the data signal to the drive electrode in the second writing sub-period S12 is not limited. For example, data signals can be written into the driving electrodes according to a conventional timing sequence, which ensures a simple data writing sequence for the driving electrodes while ensuring uniformity of the display image projected by the liquid crystal grating.

[0297] Illustratively, within the second writing sub-period S12, the low level of the first control signal output terminal Mux1, the low level of the second control signal output terminal Mux2, the low level of the third control signal output terminal Mux3, the low level of the fourth control signal output terminal Mux4, the low level of the fifth control signal output terminal Mux5 and the low level of the sixth control signal output terminal Mux6 appear in chronological order, thereby writing a 1V data signal to the first drive electrode D1, a 2V data signal to the second drive electrode D2, a 3V data signal to the third drive electrode D3, a 4V data signal to the fourth drive electrode D4, a 5V data signal to the fifth drive electrode D5, and a 6V data signal to the sixth drive electrode D6 in chronological order.

[0298] In other embodiments, the first period S1 includes a plurality of writing sub-periods S10 , and the plurality of writing sub-periods S10 each include the first stage.

[0299] Based on the same inventive concept, an embodiment of the present invention further provides a stereoscopic display device. This stereoscopic display device includes a liquid crystal grating according to any embodiment of the present invention. Therefore, the stereoscopic display device provided by the embodiment of the present invention has the corresponding beneficial effects of the liquid crystal grating provided by the embodiment of the present invention, which will not be described in detail here. For example, the stereoscopic display device can be a mobile phone, a tablet computer, a laptop computer, or any other product or component with a display function, such as a television, a display area, a digital photo frame, a navigation system, a smart wearable display device, etc., and the embodiment of the present invention does not specifically limit this.

[0300] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes a first type of subgroup; In the same first-type subgroup, data signals are sequentially written to the driving electrodes from the edge of the first-type subgroup to the center of the first-type subgroup, and alternately from beginning to end; or the electrode group includes a second type of subgroup; In the same second-type subgroup, data signals are written to the driving electrodes one by one in sequence from the first driving electrode in the second-type subgroup to the last driving electrode in the second-type subgroup; The second driving electrode, the third driving electrode, ..., the N-1th driving electrode in the electrode group constitute the second subgroup; In the same electrode group, the time sequence for writing data signals for the N driving electrodes is: the first driving electrode, the Nth driving electrode, and the second subgroup; or the electrode group includes a third type of subgroup; In the same third sub-group, data signals are written into the driving electrodes in sequence from the center of the third sub-group to the edge of the third sub-group, and alternately from beginning to end.

2. The liquid crystal grating according to claim 1, wherein When the electrode group includes the first type of subset or the electrode group includes the second type of subset, i=1, j=2.

3. The liquid crystal grating according to claim 1, wherein When the electrode group includes the third type of subgroup, i=N-1, j=N.

4. The liquid crystal grating according to claim 1, wherein It also includes a multiplexer circuit and a source line; The multi-way selection circuit includes an input end and N output ends, the input end is electrically connected to the source line, and the N output ends are electrically connected one-to-one with the N driving electrodes in the same electrode group. The multi-way selection circuit is used to electrically connect one of the N output ends to the source line during a data writing period.

5. The liquid crystal grating according to claim 1, wherein The at least partial working period includes a first period and a second period, the first period includes the first stage, the second period includes the first stage, wherein the voltage polarity of the data signal in the first period is opposite to the voltage polarity of the data signal in the second period.

6. The liquid crystal grating according to claim 1, wherein The at least partial working period includes a first period, the first period includes a plurality of writing sub-periods, and the first writing sub-period includes the first stage.

7. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes M electrode sub-groups arranged in sequence, and the electrode sub-group includes a plurality of the driving electrodes; writing data signals to the M electrode subgroups one by one in sequence during M subgroup writing periods, wherein the subgroup writing period includes a plurality of data writing periods; Wherein, M is a positive integer greater than 1; The plurality of electrode subgroups include a first electrode subgroup and a second electrode subgroup, data signals are written to the driving electrodes in the first electrode subgroup during the u-th subgroup writing period, and data signals are written to the driving electrodes in the second electrode subgroup during the v-th subgroup writing period; v>u, where u and v are positive integers; The first electrode subgroup is a third type subgroup; in the same third type subgroup, data signals are written to the driving electrodes in sequence from the center of the third type subgroup to the edge of the third type subgroup, alternating from beginning to end; The second electrode subgroup is a first type subgroup; in the same first type subgroup, data signals are written to the driving electrodes in sequence from the edge of the first type subgroup to the center of the first type subgroup, alternating from beginning to end.

8. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes M electrode sub-groups arranged in sequence, and the electrode sub-group includes a plurality of the driving electrodes; writing data signals to the M electrode subgroups one by one in sequence during M subgroup writing periods, wherein the subgroup writing period includes a plurality of data writing periods; Wherein, M is a positive integer greater than 1; The plurality of electrode subgroups include a first electrode subgroup and a second electrode subgroup, data signals are written to the driving electrodes in the first electrode subgroup during the u-th subgroup writing period, and data signals are written to the driving electrodes in the second electrode subgroup during the v-th subgroup writing period; v>u, where u and v are positive integers; The first electrode subgroup and the second electrode subgroup are first type subgroups; in the same first type subgroup, data signals are written to the driving electrodes in sequence from the edge of the first type subgroup to the center of the first type subgroup, alternating from beginning to end.

9. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes M electrode sub-groups arranged in sequence, and the electrode sub-group includes a plurality of the driving electrodes; writing data signals to the M electrode subgroups one by one in sequence during M subgroup writing periods, wherein the subgroup writing period includes a plurality of data writing periods; Wherein, M is a positive integer greater than 1; The plurality of electrode subgroups include a first electrode subgroup and a second electrode subgroup, data signals are written to the driving electrodes in the first electrode subgroup during the u-th subgroup writing period, and data signals are written to the driving electrodes in the second electrode subgroup during the v-th subgroup writing period; v>u, where u and v are positive integers; The first electrode subgroup and the second electrode subgroup are third-type subgroups; in the same third-type subgroup, data signals are written to the driving electrodes in sequence from the center of the third-type subgroup to the edge of the third-type subgroup, alternating from beginning to end.

10. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes M electrode sub-groups arranged in sequence, and the electrode sub-group includes a plurality of the driving electrodes; writing data signals to the M electrode subgroups one by one in sequence during M subgroup writing periods, wherein the subgroup writing period includes a plurality of data writing periods; Wherein, M is a positive integer greater than 1; The plurality of electrode subgroups include a first electrode subgroup and a second electrode subgroup, data signals are written to the driving electrodes in the first electrode subgroup during the u-th subgroup writing period, and data signals are written to the driving electrodes in the second electrode subgroup during the v-th subgroup writing period; v>u, where u and v are positive integers; The first electrode subgroup and the second electrode subgroup are second-type subgroups; in the same second-type subgroup, data signals are written to the driving electrodes one by one in sequence, from the first driving electrode in the second-type subgroup to the last driving electrode in the second-type subgroup; The Nth driving electrode is the last driving electrode in the 1st electrode subgroup, and the data signal is written in the last data writing period in the 1st subgroup writing period. The 1st driving electrode is the last driving electrode in the 2nd electrode subgroup, and the data signal is written in the last data writing period in the 2nd subgroup writing period.

11. A liquid crystal grating, characterized in that: comprising a plurality of electrode groups, wherein the electrode groups include N driving electrodes arranged in sequence; At least part of the operating period of the liquid crystal grating includes a first stage, and the first stage includes: In the same electrode group, a data signal is written to the first driving electrode in the i-th data writing period, and a data signal is written to the N-th driving electrode in the j-th data writing period, i and j are not equal, and the difference between i and j is less than N-1; Wherein, 1≤i≤N, 1≤j≤N, i and j are positive integers, and N is a positive integer greater than 1; The electrode group includes M electrode sub-groups arranged in sequence, and the electrode sub-group includes a plurality of the driving electrodes; writing data signals to the M electrode subgroups one by one in sequence during M subgroup writing periods, wherein the subgroup writing period includes a plurality of data writing periods; Wherein, M is a positive integer greater than 2; In the same electrode group, during the p-th subgroup writing period, data signals are written to the driving electrodes in the first electrode subgroup, and during the q-th subgroup writing period, data signals are written to the driving electrodes in the M-th electrode subgroup, p and q are not equal, and the difference between p and q is less than M-1; Among them, 1≤p≤M, 1≤q≤M, p and q are positive integers.

12. The liquid crystal grating according to claim 11, characterized in that In the same electrode group, data signals are written into the electrode sub-groups in sequence from the edge of the electrode group to the center of the electrode group and alternately from beginning to end.

13. The liquid crystal grating according to claim 11, characterized in that In the same electrode group, data signals are written into the electrode sub-groups in sequence from the center of the electrode group to the edge of the electrode group, and alternately from beginning to end.

14. A stereoscopic display device, characterized in that: The liquid crystal grating comprises the liquid crystal grating according to any one of claims 1 to 13.

Images