CN116403516B - Display driving method and display driving chip - Google Patents
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- CN116403516B CN116403516B CN202310657473.8A CN202310657473A CN116403516B CN 116403516 B CN116403516 B CN 116403516B CN 202310657473 A CN202310657473 A CN 202310657473A CN 116403516 B CN116403516 B CN 116403516B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The application relates to a display driving method and a display driving chip, belongs to the field of LED display, and solves the problem that an LED display screen in the prior art is poor in effect. The display driving method includes: confirming a first time point t1 in a display area, wherein t0< t1< t2, and t0 and t2 respectively represent the starting time and the ending time of the display area; uniformly distributing PWM waves to two sides of the first time point t1; or, distributing the PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the distributable area on the side is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1; and outputting a constant current based on the PWM wave. The driving method of the application can obviously improve the display effect.
Description
Technical Field
The application relates to the field of LED display, in particular to an LED display driving method and an LED display driving chip.
Background
In the prior art, a frame of image is typically divided into a plurality of display subframes, and one display subframe is divided into a plurality of display packets. The display is performed on a display packet-by-display-packet-by-sub-frame basis, thereby completing the display of the entire image.
For a display packet, display data is allocated to a display area, typically from the beginning of the display area to the back (as in fig. 1), or from the end of the display area to the back to the front. However, since the precharge is involved in front of the display area (for example, to eliminate the first line darkness problem), and the shadow is involved in back of the display area, if the display data is distributed directly from the start time or the end time of the display area, that is, the time when the constant current source is turned on is close to the front or the back of the display area, the precharge and the shadow elimination process in front will be affected, resulting in poor display effect.
The above problems are to be solved.
Disclosure of Invention
The application aims to overcome the defects of the prior art and provides a display driving method and a display driving chip so as to remarkably improve the display effect of an LED.
A first aspect of the present application provides a display driving method, comprising:
confirming a first time point t1 in a display area, wherein t0< t1< t2, and t0 and t2 respectively represent the starting time and the ending time of the display area;
uniformly distributing PWM waves to two sides of the first time point t1;
or alternatively, the first and second heat exchangers may be,
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and outputting a constant current based on the PWM wave.
According to the application, the PWM wave starts to grow at the middle position of the display area, so that the influence on precharge and shadow elimination is reduced as much as possible, and the display effect is improved.
Optionally, distributing PWM waves equally to both sides of the first time point t1, including:
the gray values corresponding to the PWM wave widths allocated at two sides of the first time point t1 are M, N, m=q0×a+y, n=q0×a+b, where A, B is an integer part and a remainder part of X/2, X, Y is an integer part and a remainder part of Q/Q0, Q is a gray value of gray data, and Q0 is a first threshold.
Optionally, the PWM wave is equally distributed to both sides of the first time point t1, including:
the gray values corresponding to the widths of the PWM waves distributed on the two sides of the first time point t1 are M, N, n=m+b; wherein M, B is an integer part and a remainder part of Q/2, respectively, and Q is a gray value of gray data.
Alternatively, t1= (t0+t2)/2.
Optionally, the PWM wave includes a dwell portion, the dwell portion being located either before or after the PWM wave.
Optionally, the display driving method further includes:
when the gray value allocated to the display area is not 0, pre-charging the column line to a corresponding potential when the gray value allocated to the display area is outside the display area;
when the gray value allocated to the display area is 0, the column lines are precharged to corresponding potentials in a time sharing manner in the display unit; wherein, the display unit refers to the minimum display grouping of the display data in one subframe, and the display area is included in the display unit.
Optionally, the first time point t1 is configurable according to the display effect.
In another aspect, the application provides a display driver chip. It comprises the following steps:
a storage circuit configured to configure a first time point t1, t0< t1< t2 in a display area, wherein t0, t2 represent a start time and an end time of the display area, respectively;
a PWM wave generating circuit configured to:
equalizing the PWM waves to two sides of the first time point t1;
or alternatively, the first and second heat exchangers may be,
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and the channel current output module outputs constant current based on the PWM wave.
Optionally, the gray values corresponding to the PWM wave widths allocated at two sides of the first time point t1 are M, N, m=q0×a+y, n=q0×a+b, where A, B is an integer part and a remainder part of X/2, X, Y is an integer part and a remainder part of Q/Q0, Q is a gray value of gray data, and Q0 is a first threshold.
Optionally, the gray values corresponding to the PWM wave widths allocated at two sides of the first time point t1 are M, N, where n=m+b; wherein M, B is an integer part and a remainder part of Q/2, respectively, and Q is a gray value of gray data.
Optionally, the PWM wave includes a dwell portion, the dwell portion being located either before or after the PWM wave.
Optionally, the display driving chip further includes:
a precharge circuit for precharging the column lines to a corresponding potential when the gradation value allocated to the display area is not 0;
when the gray value allocated to the display area is 0, the column lines are precharged to corresponding potentials in a time sharing manner in the display unit; wherein the display unit refers to a minimum display packet of gray data within one subframe, and the display area is included in the display unit.
Optionally, the first time point t1 is configurable according to the display effect.
The beneficial effects of the application are as follows:
compared with the prior art, the application provides a display driving method and a display driving chip, which can reduce the influence on front pre-charge and rear shadow elimination as much as possible and improve the display effect by reasonably distributing the display data positions (for example, the positions of PWM wave high levels).
Drawings
FIG. 1 is a prior art PWM wave growth scheme;
FIG. 2 is a schematic diagram of gray data display provided by the present application;
FIG. 3 shows a PWM wave growth method according to an embodiment of the present application;
FIG. 4 is a PWM wave growth pattern according to another embodiment of the present application;
FIG. 5 is a schematic diagram of a display driver chip according to an embodiment of the application.
Detailed Description
The technical scheme of the present application is described in further detail below with reference to specific embodiments, but the scope of the present application is not limited to the following description.
Fig. 1 shows a prior art PWM (pulse width modulation ) wave growth pattern. Let t0 and t2 be the start time and the end time of the display area, t3 (e.g., rising edge) be the start time and t4 (e.g., falling edge) be the end time of the PWM wave, respectively. The prior art tends to grow PWM waves backward along the start time t0 of the display area (as in fig. 1, where the start time of the display area and the start time of the PWM waves are the same) or forward along the end time t2 of the display area.
Fig. 2 provides a schematic diagram of gray data display. One complete display frame is divided into a plurality of subframes (P), and one complete subframe includes a plurality of display packets (1 st line display packet, 2 nd line display packet, … …, mth display packet, m is the number of display screen lines). The display unit of the present application refers to a minimum display packet of gradation data in one display subframe (for example, the display unit displays a display period of one display packet), and the display area is a portion included in the display unit and is used for distributing gradation data or PWM waves (it should be noted that the display period for displaying one display packet may include a precharge period in front of the display area and a shadow elimination period behind the display area in addition to the display area). In general, there is a precharge before the display area to eliminate the first row from being dark, and there is a deghosting operation after the display area. If the PWM growth method shown in fig. 1 is used, the PWM wave to be grown is not close to the front region of the display region, but not close to the rear region of the display region, which will affect the display effect. Fig. 2 provides a schematic diagram of gray data display. One complete display frame is divided into a plurality of subframes (P), and one complete subframe includes a plurality of display packets (1 st line display packet, 2 nd line display packet, … …, mth display packet, m is the number of display screen lines). The display unit of the present application refers to a minimum display packet of gradation data in one display subframe (for example, the display unit displays a display period of one display packet), and the display area is a portion included in the display unit and is used for distributing gradation data or PWM waves (it should be noted that the display period for displaying one display packet may include a precharge period in front of the display area and a shadow elimination period behind the display area in addition to the display area). In general, there is a precharge before the display area to eliminate the first row from being dark, and there is a deghosting operation after the display area. If the PWM growth method shown in fig. 1 is used, the PWM wave to be grown is not close to the front region of the display region, but not close to the rear region of the display region, which will affect the display effect.
In order to solve the above problems, an aspect of the present application provides a display driving method, specifically, a display driving method of an LED display screen. The method comprises the following steps:
confirming a first time point t1 in a display area, wherein t0< t1< t2, and t0 and t2 respectively represent the starting time and the ending time of the display area;
uniformly distributing PWM waves to two sides of the first time point t1;
or alternatively, the first and second heat exchangers may be,
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and outputting a constant current based on the PWM wave.
The display area of the present application refers to an area for distributing display data (i.e., gradation data or PWM wave), and the area to which display data (gradation data or PWM wave) is distributed is regarded as an actual display area, wherein the width of the PWM wave corresponds to the size of the gradation data, both of which reflect the lighting time period of the lamp beads. As shown in fig. 1 and 3, the start time and the end time of the display area are t0 and t2, respectively, the width of the area where the display data can be allocated is t2-t0, and the high level portion is the actual display area, i.e., the portion where the gray data or PWM wave is actually allocated. It is to be understood that the driving chip controls whether the lamp beads are lighted according to the PWM wave, for example, controls and outputs a constant current in the high level stage, so as to light the lamp beads, and stops outputting the constant current in the low level stage, so that the lamp beads are extinguished. The width of the high level (i.e., the width of the PWM wave) characterizes the bead lighting duration.
As described above, in the prior art, if the PWM wave grows from front to back from the start time t0 or from back to front from the end time t2 of the display area, the precharge of the front is not necessarily affected, and the low-gray display effect is not affected.
Based on this, the present application proposes a method of growing from the middle to both sides. I.e. finding the appropriate point in time t1 between t0-t2 (t 0< t1< t 2), the PWM wave is grown starting from t 1. The present application provides two ways to start growing from t1, please refer to fig. 3-4.
Note that, the PWM wave allocated to the display area according to the present application is a continuous segment, and as shown in fig. 1, 3, and 4, a start time (e.g., a rising edge time) and an end time (e.g., a falling edge time) thereof are denoted by t3 and t4, respectively, and then t3< = t1< = t4 (i.e., the PWM wave is at a high level in the segments t3 to t 4). And the PWM width characterizes the size of the gray data, which is used for determining the lighting duration of the LED lamp beads.
Fig. 3 (vertical axis represents the gradation value of gradation data, and horizontal axis represents time) shows how PWM waves (gradation data) are uniformly grown (distributed) to both sides along the first time point t1 as the gradation data changes (e.g., increases). The term "balanced growth" refers to that the gray values corresponding to the widths of the PWM waves distributed on both sides of t1 are not greatly different, for example, within an allowable threshold range, such as a difference of Q0 (a first threshold, which will be described in detail later), and in one embodiment, the gray values are integers, and Q0 is an integer; in this case, when the gradation value is 1, it is allocated to one side, when the gradation value is 2, it is allocated to 1 on both sides, when the gradation value is 3, it is allocated to 2 on one side, and when the gradation value is 4, it is allocated to 2 on both sides. Q0=1 at this time. Of course, Q0 may also be other values, such as any number greater than 1, or an integer greater than or equal to 2.
Fig. 4 shows how PWM waves are distributed to both sides of t1 as the gradation data changes (e.g., increases). When the gradation value is small (here, when the gradation value is 4 or less), PWM can be grown to one side along t1, and at this time, t0= < t3< t1, t4=t1 as shown in fig. 4; if the gradation data is sufficiently large (here, when the gradation value is greater than 4), as shown in fig. 4, the width of the allocable gradation data (PWM wave) on the t1 side (i.e., the width of the display area on the t1 side) is only 4, the gradation data (PWM wave) is allocated to the above-described side and fills the side (here, the left side is allocated to be full, i.e., the corresponding gradation value is 4), and the unallocated gradation data (the unallocated PWM wave portion, the corresponding gradation value is 1) grows along the t1 to the other side, with the result that, as shown in fig. 4, t3=t0, t1< t4< = t2. Taking the high level between the PWM values t3 and t4 as an example, that is, the gray data (PWM is high) is all allocated on one side of t1 (left side in fig. 4), and the gray data starts to be allocated on the other side of t1 along t1 (the gray value corresponding to the high level width from t1 to right is 1).
In the second method, when the gradation value of the gradation data is small, the gradation data is directly allocated to one side of t1, and when the gradation data is large, the width of the side to which the gradation data can be allocated is insufficient, and when the gradation data is large, the other side is allocated along t1 except for the allocation of part of the gradation data to fill the side.
In a possible implementation manner, PWM waves are equally distributed to both sides of the first time point t1, at this time:
the gray scale values corresponding to the PWM wave widths (expressed by W1 and W2) allocated on both sides of the first time point t1 are M, N, m=q0×a+y, n=q0×a+b, wherein A, B is an integer part (quotient) and a remainder part (remainder) of X/2, X, Y is an integer part and a remainder part of Q/Q0, Q is a gray scale value of gray scale data, and Q0 is a first threshold.
That is, the gray value magnitudes M and N corresponding to the PWM width at both sides of t1 differ by not more than Q0. Taking q0=2 as an example, if q=1, 2, the gradation data are all distributed to the left of t1; if q=3, 4, one side is assigned 2 and the other side is assigned 1, 2; if q=5, 6, one side is assigned 2 and the other side is assigned 3, 4; if q=7, 8, one side is assigned 4, and the other side is assigned 3, 4, … ….
In a possible implementation manner, when the PWM waves are distributed equally to two sides of the first time point t1, the gray values corresponding to the widths of the PWM waves distributed on two sides of the first time point t1 are M, N, where n=m+b; wherein M, B is an integer part and a remainder part of Q/2, respectively, and Q is a gray value of gray data.
As shown in fig. 3, the gradation data is distributed as evenly as possible to both sides of t 1. For example, if q=1, it is allocated to one side of t1, if q=2, both sides of t1 are 1, if q=3, one side is 1, one side is 2, if q=4, one side is 2, and so on.
In a preferred embodiment, t1= (t0+t2)/2. I.e. the first time point t1 is located in the very middle of the display area. It will be appreciated that at this point, a compromise is made between the effects of the preceding precharge and the deghosting, the greatest possible improvement in display performance.
In a preferred embodiment, the PWM wave comprises a dwell portion. Assuming that the original gradation data is Q and the gradation data corresponding to the width of the widening section is ADD, the total gradation data corresponding to the width of the PWM wave is q+add at the time of actual display. The ADD part has different uses in different scenarios. In some cases, it is used to form gray data with higher precision with Q. For example, the gray data to be actually displayed is 3.2T, T refers to a clock period, and only 3T can be displayed due to hardware limitation in the related art. To obtain accurate 3.2T, the PWM of 3T needs to be stretched to obtain a PWM wave of 3.2T. In other situations, low gray compensation needs to be performed on low gray data, and at this time, the original gray data needs to be compensated, so that a stretched PWM wave is obtained. Regardless of the scenario, the PWM wave grown in the manner set forth above may be such a stretched PWM wave.
In one embodiment, the display driving method further includes:
when the gray value allocated to the display area is not 0, pre-charging the column line to a corresponding potential when the gray value allocated to the display area is outside the display area;
when the gray value allocated to the display area is 0, the column lines are precharged to corresponding potentials in a time sharing manner in the display unit; wherein the display unit refers to a minimum display packet of gray data within one subframe, and the display area is included in the display unit.
That is, in one display unit, if the gray value allocated to the display area is not 0 (PWM has a high level phase), that is, the LED beads are turned on, after the line feed, precharge is performed before the display area, and the column lines are charged to a predetermined potential (for eliminating the first line darkness). After the display area end time, the column lines are precharged for blanking before wrapping. Within the display area, the precharge circuit is in an off state; outside the display area, the precharge circuit precharges the column lines in a time-sharing manner, and each period corresponds to a target potential to which the column lines are charged. For example, starting at time1, the precharge circuit charges the column line to V1, starting at time2, the precharge circuit charges the column line to V2, starting at time3, the precharge circuit is turned off, starting at time4, and the precharge circuit charges the column line to V3. Of course, the precharge process need not be as described above, but may include fewer or more charge phases.
If the gray value allocated to the display area is 0, it indicates that the LED lamp beads are not turned on, and at this time, the operation of precharging the column lines may be located in the entire display unit according to the display effect. In the display unit, the column lines are charged to respective predetermined target potentials in a time-sharing manner. And when the gray value is 0 or not, the target potential corresponding to each stage can be adjusted according to the display effect.
In an alternative embodiment, the first point in time t1 is configurable according to the display effect.
A second aspect of the present application provides a display driving chip which can perform the display driving method of the first aspect. As shown in fig. 5, the display driving chip includes:
a storage circuit configured to configure a first time point t1, t0< t1< t2 in a display area, wherein t0, t2 represent a start time and an end time of the display area, respectively;
a PWM wave generating circuit configured to:
equalizing the PWM waves to two sides of the first time point t1;
or alternatively, the first and second heat exchangers may be,
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and the channel current output module outputs constant current based on the PWM wave.
Wherein the memory circuit is selectable as a register. In one embodiment, t1 may be adjusted according to the display effect, and how the PWM wave is grown along t1 as the gradation data increases.
And the PWM wave generating circuit is used for generating PWM waves according to the gray data, and the positions of the PWM waves grow in the two modes, namely, the two sides of the T1 are uniformly grown, or when the gray value of the gray data is smaller, the PWM waves grow on one side of the T1, and when the gray value of the gray data is larger, the rest parts grow on the other side except the side which is full of the gray value.
The channel current output module can output constant current according to PWM waves and is used for lighting the LED lamp beads.
In some embodiments, when the PWM wave is equally distributed to two sides of the first time point t1, the gray values corresponding to the widths of the PWM waves distributed to two sides of the first time point t1 are M, N, m=q0×a+y, and n=q0×a+b, where A, B is an integer part and a remainder part of X/2, X, Y is an integer part and a remainder part of Q/Q0, Q is a gray value of gray data, and Q0 is a first threshold.
In some embodiments, when the PWM wave is equally distributed to two sides of the first time point t1, the gray values corresponding to the widths of the PWM waves distributed to two sides of the first time point t1 are M, N, where n=m+b; wherein M, B is an integer part and a remainder part of Q/2, respectively, and Q is a gray value of gray data.
In some embodiments, the PWM wave comprises a dwell portion. The description of the stretching portion is as described above, and will not be repeated here.
In some embodiments, the display driving chip further includes:
a precharge circuit for precharging the column lines to a corresponding potential when the gradation value allocated to the display area is not 0;
when the gray value allocated to the display area is 0, the column lines are precharged to corresponding potentials in a time sharing manner in the display unit; wherein the display unit refers to a minimum display packet of gray data within one subframe, and the display area is included in the display unit.
The time-sharing pre-charging the column lines to corresponding potentials refers to that the pre-charging circuit starts to pre-charge the column lines to preset corresponding target potentials in sequence at different time points. For example, starting at time1, the precharge circuit charges the column line to V1, starting at time2, the precharge circuit charges the column line to V2, and starting at time3, the precharge circuit charges the column line to V3.
In some embodiments, the first time point t1 is configurable according to the display effect.
In a preferred embodiment, t1= (t0+t2)/2. I.e. the first time point is located in the middle of the display area. It can be appreciated that at this time, a compromise is made with respect to the effects of precharge and deghosting, and the display effect is most likely to be improved.
The foregoing is merely a preferred embodiment of the application, and it is to be understood that the application is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.
Claims (10)
1. A display driving method, characterized by comprising:
confirming a first time point t1 in a display area, wherein t0< t1< t2, and t0 and t2 respectively represent the starting time and the ending time of the display area;
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and outputting a constant current based on the PWM wave.
2. A display driving method according to claim 1, wherein t1= (t0+t2)/2.
3. A display driving method according to claim 1, wherein the PWM wave comprises a dwell portion.
4. A display driving method according to claim 1, wherein the display driving method further comprises:
when the gray value allocated to the display area is not 0, pre-charging the column line to a corresponding potential when the gray value allocated to the display area is outside the display area;
when the gray value allocated to the display area is 0, precharging the column line to a corresponding potential in a display unit; wherein, the display unit refers to the minimum display grouping of gray data in one display subframe, and the display area is included in the display unit.
5. A display driving method according to any one of claims 1 to 4, wherein the first time point t1 is configured according to a display effect.
6. A display driving chip, comprising:
a storage circuit configured to configure a first time point t1, t0< t1< t2 in a display area, wherein t0, t2 represent a start time and an end time of the display area, respectively;
a PWM wave generating circuit configured to:
distributing PWM wave to one side of the first time point t1 along the first time point t1, and if the width of the side distributable area is smaller than that of the PWM wave, distributing the PWM wave part exceeding the width of the distributable area to the other side of the first time point t1 along the first time point t1;
and the channel current output module outputs constant current based on the PWM wave.
7. The display driver chip of claim 6, wherein the memory circuit is a register.
8. The display driver chip of claim 6, wherein the first time point t1 is configured according to a display effect.
9. The display driver chip of claim 6, further comprising:
a precharge circuit for precharging the column lines to a corresponding potential when the gradation value allocated to the display area is not 0;
when the gray value allocated to the display area is 0, the column lines are precharged to corresponding potentials in a time sharing manner in the display unit; wherein the display unit refers to a minimum display packet of gray data within one subframe, and the display area is included in the display unit.
10. A display driver chip according to any of claims 6-9, wherein t1= (t0+t2)/2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310921379.9A CN116935784A (en) | 2023-06-05 | 2023-06-05 | Display driving method and display driving chip |
| CN202310657473.8A CN116403516B (en) | 2023-06-05 | 2023-06-05 | Display driving method and display driving chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN116403516A (en) | 2023-07-07 |
| CN116935784A (en) | 2023-10-24 |
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