CN115101007A - LED display screen, driving chip, driving assembly and data refreshing method thereof - Google Patents

LED display screen, driving chip, driving assembly and data refreshing method thereof Download PDF

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Publication number
CN115101007A
CN115101007A CN202210926365.1A CN202210926365A CN115101007A CN 115101007 A CN115101007 A CN 115101007A CN 202210926365 A CN202210926365 A CN 202210926365A CN 115101007 A CN115101007 A CN 115101007A
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display
time
gray scale
driving chip
driving
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唐永生
芦世雄
申石林
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Chengdu Lipson Microelectronics Co ltd
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Chengdu Lipson Microelectronics Co ltd
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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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention provides an LED display screen, a driving chip, a driving assembly and a data refreshing method thereof, and relates to the technical field of LED display, wherein the maximum gray scale digit of the driving chip is K, and the driving chip is configured as follows: under the condition that the gray scale bit number S of the display data is less than or equal to the maximum gray scale bit number K of the driving chip, dividing the display data into N subframes according to the current user configuration information of the system, and displaying each subframe at most 2 in one frame time Q‑S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K. The invention can provide a plurality of refreshing modes for a user when the gray scale digit of the display data is less than the maximum gray scale digit of the driving chip, and the display data is displayed based on the refreshing mode selected by the user, thereby being suitable for the current requirements of the user on the display picture, not being limited by the influence of the system, and further improving the refreshing rate of the display data.

Description

LED display screen, driving chip, driving assembly and data refreshing method thereof
Technical Field
The invention relates to the technical field of LED display, in particular to an LED display screen, a driving chip, a driving assembly and a data refreshing method thereof.
Background
Currently, LED display screens are frequently presented in various occasions, and their excellent display effect attracts more and more customers to purchase and use.
The gray scale number refers to a color hierarchy with different variations between the darkest and the brightest colors, generally, the gray scale number is more than 14 bits (bit), i.e. at least more than 16,384 color hierarchies, which is a high-performance LED display screen. If the gray scale of the display data is insufficient, the situation of lacking color gradation or not smooth enough gradation of gradation color occurs, and the color of the film cannot be fully displayed, so that the LED display effect is greatly reduced. On the contrary, if the gray scale bit number of the display data is higher, the higher the corresponding gray scale number is, the finer the display picture is.
However, if the total gray scale bit number is higher, the refresh rate that the system can support will be reduced, and at the same time, when the low gray scale is displayed, the low gray scale will have a longer time of non-bright state after the low gray scale is displayed in a concentrated manner, which will cause a flickering feeling to human eyes. In order to solve the problem, a mode based on S-PWM (Scambled-PWM, sine wave pulse width modulation) is provided, so that display data are scattered into a plurality of groups for display, the on-off time interval of the lamp beads is shortened, and the refresh rate is remarkably improved. However, in this method, the display quality is affected by the influence of the system frame rate and the number of packets, and currently, the refresh rate of the display data is fixed no matter the gray scale bit number of the display data is high or low, which may cause the problem that the display data has insufficient refresh and affect the display quality. Particularly, when the gradation bit number of the display data is low, the problem of screen flicker or the like due to insufficient refresh rate is more likely to occur.
Disclosure of Invention
The embodiment of the invention provides an LED display screen, a driving chip, a driving component and a data refreshing method thereof, which can provide a plurality of refreshing modes for a user when the gray scale digit of display data is less than the maximum gray scale digit of the driving chip, display the display data based on the refreshing mode selected by the user, adapt to the current requirements of the user on a display picture, are not limited to the influence of a system, can further improve the refreshing rate of the display data, and particularly can solve the problems of screen flicker and the like caused by insufficient refreshing rate when the gray scale digit of the display data is lower.
In order to solve the above problem, a first aspect of the embodiments of the present invention discloses an LED display screen driving chip, where a maximum gray scale bit number of the driving chip is K, and the driving chip is configured to:
under the condition that the gray scale bit number S of the display data is less than or equal to the maximum gray scale bit number K of the driving chip, dividing the display data into N subframes according to the current user configuration information of the system, and displaying each subframe at most 2 in one frame time Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
Further, the driving chip is configured to:
scattering total gray scale time corresponding to the current actual gray scale bit number of the driving chip into N groups of first display time, wherein each group of first display time is (2) Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip; wherein the second display time of each sub-frame is (2) S /N)*T GCLK ；
Distributing N sub-frames to N groups of first display time for display, wherein each sub-frame displays 2 at most Q-S Next, the process is carried out.
Further, the allocating N subframes to N groups of first display times for displaying includes:
1/2 preceding the N sets of first display times Q-S In a time period, displaying N sub-frames one by one for 1 time;
repeatedly displaying the N sub-frames in a one-by-one display mode within the residual time period of the N groups of first display time, and repeatedly displaying 2 at most Q-S 1 time.
Further, the allocating N subframes to N groups of first display times for displaying includes:
distributing the N sub-frames to N groups of first display time in a one-to-one corresponding mode for display;
at each set of first display time, displaying the sub-frames allocated to the display at the set of first display time at most 2 Q-S Next, the process is repeated.
Further, one frame time is (2) S /N)*T GCLK *P*N*Z+T other P N Z, wherein P is the number of lines of the LED lamp connected with the driving chip, T other The total time of each group is the other time except the first display time, and the total time of each group is one frame time/N;
when T is other When equal to 0, Z is equal to 2 Q-S 。
The second aspect of the embodiment of the invention discloses an LED display screen driving assembly, which comprises a controller and at least one driving chip, wherein the controller is connected with the driving chips through data lines, the driving chips are cascaded through the data lines, and the driving chips are the LED display screen driving chips according to the first aspect of the embodiment of the invention;
the controller is configured to: receiving display data with gray scale digit S and current user configuration information transmitted by a system, and transmitting the display data and the user configuration information to a driving chip;
the driver chip is configured to: under the condition that S is less than or equal to the maximum gray scale digit K of the driving chip, dividing the display data into N subframes according to user configuration information, and displaying each subframe within one frame time at most 2 Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
Further, the system is connected to the driving assembly and a user side, respectively, and the user side is configured to:
displaying a configuration interface of the system; the user configuration information is generated by the user terminal aiming at the received trigger operation on the configuration interface;
and transmitting the user configuration information and the input display data to the system.
The third aspect of the embodiment of the invention discloses an LED display screen, which comprises a display end and an LED display screen driving component as the second aspect of the embodiment of the invention, wherein the driving component is connected with the display end.
The fourth aspect of the embodiments of the present invention discloses a data refreshing method, which is applied to the LED display screen driving assembly according to the second aspect of the embodiments of the present invention, and the method includes:
a controller in the driving component receives display data with gray scale digit S and current user configuration information transmitted by a system and transmits the display data and the user configuration information to a driving chip in the driving component;
the driving chip divides the display data into N subframes according to the user configuration information under the condition that S is less than or equal to the maximum gray scale digit K of the driving chip, and displays each subframe at most 2 in one frame time Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
The embodiment of the invention has the following advantages:
the embodiment of the invention provides a driving chip, the maximum gray scale digit of the driving chip is K, and the driving chip is configured as follows: under the condition that the gray scale bit number S of the display data is less than or equal to the maximum gray scale bit number K of the driving chip, dividing the display data into N subframes according to the current user configuration information of the system, and displaying each subframe at most 2 in one frame time Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K. The embodiment of the invention can provide a plurality of refreshing modes for a user when the gray scale digit of the display data is less than the maximum gray scale digit of the driving chip, and display the display data based on the refreshing mode selected by the user, so that the embodiment of the invention is suitable for the current requirements of the user on the display picture, is not limited to the influence of the system, can further improve the refreshing rate of the display data, and particularly can solve the problems of screen flicker and the like caused by insufficient refreshing rate when the gray scale digit of the display data is lower.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an LED display driving chip according to an embodiment of the present invention;
FIG. 2 is a waveform diagram illustrating a refresh method for N sub-frames according to an embodiment of the present invention;
FIG. 3 is a waveform diagram illustrating another refresh method for N subframes according to an embodiment of the present invention;
FIG. 4a is a diagram of an exemplary display allocation for N sub-frames in the refresh mode shown in FIG. 3;
FIG. 4b is a diagram of another embodiment of the display allocation of N sub-frames in the refresh mode shown in FIG. 3;
FIG. 5 is a schematic diagram of an LED display screen driving assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of an LED display screen according to an embodiment of the present invention;
FIG. 7 is a flow chart of steps of a data refresh method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the current LED display screen, a high gray scale LED driving chip is basically selected, that is, the gray scale bit number of the driving chip is higher, so as to meet the display requirement of the display data of the same high gray scale. However, in practice, the gray scale bit number of the display data selected by the user may not match the maximum gray scale bit number of the driver chip. That is, the gray scale bits of the display data selected by the user may be smaller than the maximum gray scale bits of the driver chip. Under the condition, the embodiment of the invention provides a plurality of refreshing modes for the user so as to meet the display requirements of the user on the display data.
Based on this, in a first aspect of the embodiments of the present invention, an LED display screen driving chip is disclosed, and referring to fig. 1, fig. 1 shows a schematic diagram of an LED display screen driving chip according to an embodiment of the present invention, assuming that a maximum gray scale bit of the driving chip is K, the driving chip is configured to:
under the condition that the gray scale bit number S of the display data is less than or equal to the maximum gray scale bit number K of the driving chip, dividing the display data into N subframes according to the current user configuration information of the system, and displaying each subframe within one frame time at most 2 Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
In an embodiment of the invention, the system may be understood as an LED display screen system.
The user configuration information may be understood as related information generated for controlling the display effect of the LED display screen according to the selection or configuration operation of the user. In this embodiment of the present invention, the user configuration information may specifically include information for indicating a refresh effect of the display data, for example, the user configuration information includes T GCLK The GCLK frequency, the actual gray scale bit number Q of the driving chip and the repeated display times.
In the embodiment of the present invention, when the gray scale bit number S of the display data is equal to the maximum gray scale bit number K of the driver chip, since S is equal to K, that is, to ensure complete display of the display data, the current actual gray scale bit number Q of the driver chip can only be equal to K, that is, Q-S is equal to 0, at this time, the display data is divided into N subframes according to the current user configuration information of the system, and each subframe can only be displayed for 1 time at most within one frame time. Therefore, in this case, the user only has a selection mode, and the embodiment of the present invention is not described herein again.
Next, the embodiment of the present invention mainly explains the display application in the case where the gray-scale bit number S of the display data selected by the user is smaller than the maximum gray-scale bit number K of the driver chip.
When the gray scale digit S of the display data is less than the maximum gray scale digit K of the driving chip, the system can at least provide 2 refreshing modes of the display data for a user. Taking S as 14bit and the maximum gray scale bit number K of the driving chip as 16bit as an example, specifically:
when the driving chip operates by using 16 bits of maximum gray scale digit, namely the actual gray scale digit of the driving chip is 16 bits, the driving chip is used for driving the driving chip in one frame based on the S-PWM technologyThe total gray scale time of the internal energy supporting display is scattered into 64 groups, and the first display time corresponding to each group is (2) 16 /64)*T GCLKA ＝1024*T GCLKA ，T GCLKA Is the unit gray scale time of the driving chip;
when the actual gray scale bit number of the driving chip is 15 bits, the total gray scale time which can support display in one frame time is scattered into 64 groups based on the S-PWM technology, and the first display time corresponding to each group is (2) 15 /64)*T GCLKB ＝512*T GCLKB ，T GCLKB Is the unit gray scale time of the driving chip;
when the actual gray scale bit number of the driving chip is 14 bits, the total gray scale time supporting display in one frame time is scattered into 64 groups based on the S-PWM technology, and the first display time (2) corresponding to each group 14 /64)*T GCLKC ＝256*T GCLKC ，T GCLKC Is the unit gray scale time of the driving chip.
When the drive chip divides the 14-bit display data into 64 subframes for display in one frame time based on the S-PWM technology, the second display time corresponding to each subframe is 256 × T GCLK ，T GCLK Is the unit gray scale time of the driving chip.
It can be seen that, for the display data with 14 bits of gray scale bits, when the actual gray scale bits of the driving chip are 14 bits, T is GCLK＝ T GCLKC Each sub-frame is allocated to a first display time of 256 × T GCLKC When the display is performed next, the subframe can be displayed for 1 time at most; when the actual gray scale bit number of the driving chip is 15bit, T GCLK＝ T GCLKB Each sub-frame is allocated to a first display time of 512 × T GCLKB When the display is performed next, the subframe can be displayed for 2 times at most; when the actual gray scale bit number of the driving chip is 16bit, T GCLK＝ T GCLKA Each sub-frame is assigned to a first display time 1024T GCLKA When displaying next, the sub-frame can be displayed at most 4 times.
According to the above embodiments, it can be known that when the difference between K and S is 2, the display data can be displayed at most 1-2 K-S In between, preferably by displaying wholeSeveral times. Then, a plurality of refresh modes of the display data may be provided to the user, for example, 4 refresh modes of the display data may be provided to the user, that is, the refresh mode is to display the display data 2 0 The second refresh mode is to display the display data 2 1 times 1 The display data is displayed 3 times in the refresh mode three and 2 times in the refresh mode four 2 4 times. It is anticipated that the greater the difference between K and S, the more refreshing the display data the system provides to the user.
When the gray scale digit S of the display data is smaller than the maximum gray scale digit K of the driver chip, the final refresh mode of the display data may be determined according to the setting of the current refresh frequency of the display data by the user, the setting of the actual gray scale digit Q of the driver chip, and/or the setting of the unit gray scale time of the driver chip, that is, specifically according to the current user configuration information of the system. For example, when S is 13bit and K is 16bit, the display data provided by the system to the user may be refreshed in 8 ways, i.e., displaying the display data at most 1 time, 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, and 8 times, respectively, if the user sets the actual gray-scale digit Q of the driver chip to 15bit, the driver chip may display the display data at most 1 time, 2 times, 3 times, or 4 times, and the actual number of times the driver chip performs refreshing on the display data may be determined according to the number of times the user sets the refreshing.
Therefore, when the gray scale digit S of the display data is smaller than the maximum gray scale digit K of the driver chip, the user can determine the refresh mode of the display data according to the display data selected by the user, for example, select an appropriate refresh frequency for the display data and configure an appropriate actual gray scale digit Q (Q is less than or equal to K) for the driver chip, so that the display of the display data by the driver chip can meet the refresh frequency without wasting the gray scale digit of the driver chip. For example: if the number of times of refreshing selected by the user is 2, it should be considered that the difference between Q and S is at least greater than or equal to 1 according to the actual gray scale bit number Q of the driver chip, and the difference between Q and S is preferably equal to 1 (in this case, the gray scale bit number of the driver chip is not wasted). After the display data is input to the driving chip, the driving chip may divide the display data into N subframes, and then display each subframe at most 2 times within one frame time.
In specific implementation, after the display data and the user configuration information are transmitted to the driving chip, the driving chip may break up the total gray scale time corresponding to the current actual gray scale digit Q into N groups of first display times, then divide the display data into N subframes, and allocate the N subframes to the N groups of first display times for display, since each group of first display times is (2) Q /N)*T GCLK ，T GCLK The second display time of each sub-frame is (2) for driving the unit gray scale time of the chip S /N)*T GCLK The driving chip can display each sub-frame at most 2 Q-S Next, the process is repeated. The number of times the sub-frame is displayed is different according to the difference between Q and S. When Q-S is 0, the driving chip may display each sub-frame up to 1 time; when Q-S is 1, the driving chip may display each subframe up to 2 times; when Q-S is 2, the driving chip may display each subframe 4 times at most.
Referring to fig. 2, when S is Q, the driving chip allocates N sub-frames to N groups of first display times for display, each sub-frame displaying at most 2 0 This way, the first display time of each group can be refreshed 1 times, and the refresh rate is the frame rate N.
Referring to fig. 3, when S < Q, the driving chip allocates N sub-frames to N sets of first display times for display, each sub-frame displaying at most 2 Q-S This way, it is not only possible to refresh every group of first display times, since the refresh rate is the frame rate N x 2 Q -S And the refresh rate of the display data is effectively improved.
In summary, the embodiment of the present invention can provide a plurality of refresh modes to the user when the gray scale bit number of the display data is smaller than the maximum gray scale bit number of the driver chip, and display the display data based on the refresh mode selected by the user, so as to adapt to the current requirements of the user on the display screen, and not be limited to the influence of the system itself, further improve the refresh rate of the display data, and particularly solve the problems of screen flicker caused by insufficient refresh rate when the gray scale bit number of the display data is low.
The second display time per sub-frame is (2) S /N)*T GCLK Denotes that the maximum gray scale value of each sub-frame is 2 S N, corresponding to a maximum display luminance of (2) S /N)*T GCLK . For example, 15bit display data, is divided into 64 groups, and the second display time of each sub-frame is (2) 15 /64)*T GCLK It means that the maximum gray-scale value of each sub-frame is 512, and the corresponding maximum display brightness is 512 × T GCLK . Similarly, the display data, such as 14bit, is divided into 64 groups, and the second display time of each sub-frame is (2) 14 /64)*T GCLK This means that the maximum gray-scale value of each sub-frame is 256, and the corresponding maximum display luminance is 256 × T GCLK 。
Note that the display refresh rate is a frame frequency packet number N, which indicates that the display screen is scanned N times, that is, each pixel is scanned N times within one frame time. Therefore, the display data is the display data of a pixel point in a frame time, and the divided N subframes are scanned one by one for N times, which indicates the display brightness corresponding to the pixel point during each scanning. Because the picture is dynamic, the gray value of the same pixel point is not necessarily the same during each scanning. Therefore, the actual gray values corresponding to the N subframes are not necessarily the same, that is, the display brightness on the same pixel is not necessarily the same, and finally, the effective time duration of the high level can be represented as different.
Assuming that N subframes are all different, X is respectively expressed 1 、X 2 、X 3. ....X n N is the same as N, and a description will be given of a display mode in which N subframes are allocated to N groups of first display times to be displayed.
Referring to FIG. 4a, a display allocation diagram of N sub-frames according to an embodiment of the present invention is shown. The method specifically comprises the following steps: 1/2 preceding the N sets of first display times Q-S In a time period, displaying N sub-frames one by one for 1 time; repeatedly displaying the N sub-frames in a one-by-one display mode within the residual time period of the N groups of first display time, and repeatedly displaying 2 at most Q-S 1 time.
In this embodimentThe display modes of (a) can be understood as: within the starting time of N groups of first display time, N sub-frames X 1 、X 2 、X 3 .....X n Sequentially displaying once, wherein the time after displaying once just occupies the front 1/2 of the N groups of first display time Q-S Time period, in this case, N subframes X can be further divided into N groups of the remaining time periods of the first display time 1 、X 2 、X 3 .....X n Repeatedly displaying in a one-by-one manner, and repeatedly displaying at most 2 Q-S -1, refresh rate is frame rate N2 Q-S . The display mode is as follows: x 1 、X 2 、X 3 .....X n ，X 1 、X 2 、X 3 .....X n ......X 1 、X 2 、X 3 .....X n . Compared with the prior art, the display mode not only improves the refresh rate of each subframe, but also can improve the uniformity of data display through repeated display, and the display effect is better.
The following are exemplified: scattering the total gray scale time corresponding to the current actual gray scale digit Q of the driving chip into 4 groups of first display time, wherein each group of first display time is (2) Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip. If the display data with gray scale bit number S is simply represented as ABCD, the display time of each subframe is A, B, C, D, and the display time of each subframe is the second display time (2) S /N)*T GCLK And A, B, C, D are distributed to 4 groups of first display time to be displayed. If the difference between S and Q is 1, the second display time is 1/2 times of the first display time, and the subframe A and the subframe B can be sequentially displayed under the 1 st group of first display time; at the 2 nd set of first display times, subframe C, subframe D may be displayed in sequence, at which time 4 subframes ABCD have been displayed. Because 2 groups of first display time are left, if the refresh time is 2 times based on the refresh time requirement in the user configuration information, the drive chip displays the ABCD once again, that is, the subframe a and the subframe B are displayed in sequence in the 3 rd group of first display time, and the subframe C and the subframe D are displayed in sequence in the 4 th group of first display time. In this example, N subframes are assigned toThe display manner of the N sets of first display times to be displayed may be briefly understood as A, B, C, D, A, B, C, D.
Referring to FIG. 4b, a display allocation map of N sub-frames is shown in accordance with another embodiment of the present invention. The method specifically comprises the following steps: distributing the N sub-frames to N groups of first display time in a one-to-one corresponding mode for display; at most, displaying the sub-frames allocated to the display in each group of the first display time 2 Q-S Next, the process is carried out.
In an embodiment, the driving chip allocates the N subframes to N groups of first display times one by one for display, and the subframes displayed in each group of first display times are different. I.e. a set of first display times corresponding to a sub-frame, e.g. in chronological order, sub-frame X 1 Distributing to the 1 st group for the first display time, and displaying in the subframe X 2 Distributing to the 2 nd group for the first display time to display, and displaying in the subframe X 3 Assign to the 3 rd group to display under the first display time n And distributing the display time to the Nth group for display under the first display time. For example, in the 1 st group of the first display time, when the sub-frame X 1 After the display is finished once, the driving chip can make the subframe X again in the remaining time of the 1 st group of the first display time 1 Repeat display 2 Q-S -1 time; similarly, in the 2 nd group of the first display time, when the subframe X is displayed 2 After the display is finished once, the driving chip can display the sub-frame X again within the residual time of the 2 nd group of the first display time 2 Repeat display 2 Q-S In the same way, at the Nth group of first display time, when the subframe X is in the same way as the subframe X n After the display is finished once, the driving chip can display the subframe X again within the residual time of the first display time of the Nth group n Repeat display 2 Q-S 1 time. The display mode is as follows: x 1 、X 1 .....X 1 ，X 2 、X 2 .....X 2 .....X n 、X n .....X n . Compared with the prior art, the display mode effectively improves the refresh rate of each subframe.
The following are exemplified: scattering the total gray scale time corresponding to the current actual gray scale digit Q of the driving chip into 4 groups of first display time, wherein each group of first display time＝(2 Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip. If the display data with gray scale bit number S is simply represented as ABCD, the display time of each subframe is A, B, C, D, and the display time of each subframe is the second display time (2) S /N)*T GCLK And A, B, C, D are distributed to 4 groups of first display time in a one-to-one correspondence mode for display. If the difference between S and Q is 1, the second display time is 1/2 times of the first display time, and the subframe A can be repeatedly displayed for 2 times under the 1 st group of first display time, namely AA; under the 2 nd group of first display time, the subframe B can be repeatedly displayed for 2 times, namely BB; under the 3 rd group of first display time, the subframe C can be repeatedly displayed for 2 times, namely CC; the subframe D may be repeatedly displayed 2 times at the 4 th group of first display times, which is DD. In this example, a display manner in which N subframes are allocated to N groups of first display times to be displayed may be briefly understood as A, A, B, B, C, C, D, D.
The display allocation manner of the N subframes shown in fig. 4a and 4b may also be implemented by a user performing selective configuration according to the display requirement of the display data selected by the user, and finally based on the user configuration information received by the driver chip.
The above refresh modes are all ideal situations, and in practice, there are times such as precharging and line-changing in a frame time. One frame time ═ 2 S /N)*T GCLK *P*N*Z+T other P N Z, wherein P is the number of lines of the LED lamp connected with the driving chip, T other The other times except the first display time are set for each group of total time, and each group of total time is one frame time/N; when T is other When equal to 0, Z is equal to 2 Q-S . Based on the above formula, it can be known that, under the current actual gray scale bit number of the driving chip, each sub-frame can be displayed at most 2 within one frame time Q-S Next, the process is carried out.
In a second aspect of the embodiment of the present invention, an LED display screen driving assembly is disclosed, and referring to fig. 5, fig. 5 shows a schematic diagram of an LED display screen driving assembly according to an embodiment of the present invention. The driving assembly comprises a controller and at least one driving chip, wherein the controller is connected with the driving chips through data lines, the driving chips are cascaded through the data lines, and the driving chips are the LED display screen driving chips of the embodiment of the invention;
the controller is configured to: receiving display data with gray scale digit S and current user configuration information transmitted by a system, and transmitting the display data and the user configuration information to a driving chip;
the driver chip is configured to: under the condition that S is less than or equal to the maximum gray scale digit K of the driving chip, dividing display data into N subframes according to user configuration information, and displaying each subframe within one frame time at most by 2 Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
In this embodiment, the controller may be specifically connected to an SDI transmission line of the system, and the controller obtains display data and user configuration information input by a user based on the SDI transmission line, and obtains a gray-scale bit number of the display data by reading the display data. The controller transmits the display data and the user configuration information to the driving chip, then the driving chip can divide the display data into N sub-frames, and each sub-frame is displayed at most 2 in one frame time according to the user configuration information Q-S Next, the process is carried out. The embodiment can provide a plurality of refreshing modes for a user when the gray scale digit of the display data is less than the maximum gray scale digit of the driving chip, and display the display data based on the refreshing mode selected by the user, so that the display data can meet the current requirements of the user on a display picture, is not limited to the influence of the system, can further improve the refreshing rate of the display data, and can particularly solve the problems of screen flicker and the like caused by insufficient refreshing rate when the gray scale digit of the display data is low. For the principle of increasing the refresh rate of the display data, reference is made to the foregoing description, which is not repeated herein.
In an embodiment of the present invention, the system is connected to the driving component and the user side, respectively, and the user side is configured to:
displaying a configuration interface of the system; the user configuration information is generated by the user terminal aiming at the received trigger operation on the configuration interface;
and transmitting the user configuration information and the input display data to the system.
In this embodiment, the user terminal may be an intelligent display device such as a computer, a tablet computer, a smart phone, and the like, and the user terminal may be connected to the system through a data transmission card, a network cable, a data receiving card, and the like. Because the controller is connected with the driving chip, the controller can also obtain the gray scale digit of the driving chip, and the controller can transmit the gray scale digit of the driving chip to the user side through the system for displaying.
The user side can provide a configuration interface (UI interface) which can display the gray scale digit of the driving chip for a user and provide selection of different refreshing modes, and the user can select one refreshing mode to display the display data according to the requirement of the user.
The selection of the refresh mode can be realized on the configuration interface in various modes. If the selection of the refreshing mode can be expressed as a refreshing mode (I), a refreshing mode (II), a refreshing mode (III), a refreshing mode (IV) and the like on the configuration interface, wherein the refreshing mode (I) expresses that each subframe of the display data is displayed for 1 time, the refreshing mode (II) expresses that each subframe of the display data is displayed for 2 times, the refreshing mode (III) expresses that each subframe of the display data is displayed for 3 times, the refreshing mode (IV) expresses that each subframe of the display data is displayed for 4 times, after a user selects a certain refreshing mode, the generated user configuration information is used for indicating the refreshing mode, the actual gray scale digit of the driving chip is adaptively adjusted when the gray scale digit of the display data is smaller than the maximum gray scale digit of the driving chip, so that the currently input display data can be displayed according to the refreshing mode, the mode is easier to understand for the user, the operation is simpler, can be finished by one key. Of course, the implementation manner of the selection of the refresh mode on the configuration interface may be more specialized, such as providing a plurality of configuration parameters, such as T, on the configuration interface GCLK The GCLK frequency, the actual gray scale bit number Q of the driving chip, the repeated display times and other parameters, a user fills or selects the numerical value of one or more parameters, and the user side generates the parameters based on the triggering operation of the user on the configuration interfaceAnd configuring information by a user, so that when the gray scale digit of the display data is less than the maximum gray scale digit of the drive chip, the drive chip can display the currently input display data according to a configured refreshing mode based on the user configuration core.
In a third aspect of the embodiments of the present invention, referring to fig. 6, a schematic diagram of an LED display screen according to an embodiment of the present invention is shown, where the LED display screen includes a display end and an LED display screen driving assembly according to an embodiment of the present invention, and the driving assembly is connected to the display end. In the embodiment, based on the effect between the LED display screen driving component and the display end, when the gray scale digit of the display data is smaller than the maximum gray scale digit of the driving chip, a plurality of refreshing modes can be provided for a user, the display data is displayed based on the refreshing mode selected by the user, the current requirements of the user on a display picture are met, the display data is not limited to the influence of a system, compared with the prior art, the refreshing rate of the display data can be further improved, and the problems that when the gray scale digit of the display data is low, the screen flickers and the like caused by insufficient refreshing rate can be solved. For the principle of increasing the refresh rate of the display data, reference is made to the foregoing description, which is not repeated herein.
The fourth aspect of the embodiments of the present invention discloses a data refreshing method, which is applied to an LED display screen driving assembly according to an embodiment of the present invention, and referring to fig. 7, shows a flowchart of steps of the data refreshing method according to an embodiment of the present invention, where the method may include:
step S702, a controller in a driving component receives display data with gray scale digit of S and current user configuration information which are transmitted by a system, and transmits the display data and the user configuration information to a driving chip in the driving component;
step S704, the driving chip divides the display data into N sub-frames according to the user configuration information under the condition that S is less than or equal to the maximum gray scale digit K of the driving chip, and displays each sub-frame at most 2 in one frame time Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is less than or equal to Q and less than or equal to K.
Through the embodiment, when the gray scale digit of the display data is smaller than the maximum gray scale digit of the driving chip, a plurality of refreshing modes are provided for a user, the display data is displayed based on the refreshing mode selected by the user, the current requirements of the user on a display picture are met, the influence of the system is not limited, compared with the prior art, the refreshing rate of the display data can be further improved, and the problems that when the gray scale digit of the display data is low, the screen flickers are caused by insufficient refreshing rate and the like can be solved. For the principle of increasing the refresh rate of the display data, reference is made to the foregoing description, and details are not repeated herein.
In an embodiment of the present invention, the method further includes:
scattering total gray scale time corresponding to the current actual gray scale bit number of the driving chip into N groups of first display time, wherein each group of first display time is (2) Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip;
step S704, including:
in the sub-step S704-1, the driver chip divides the display data into N subframes according to the user configuration information, and a second display time corresponding to each subframe is (2) S /N)*T GCLK ；
In the sub-step S704-2, the driving chip distributes N sub-frames to N groups of first display time for display, and each sub-frame displays 2 at most Q-S Next, the process is carried out.
In an embodiment of the present invention, the sub-step S704-2 may specifically include the following implementation steps:
the driving chip 1/2 is in front of N groups of first display time Q-S In a time period, displaying N sub-frames one by one for 1 time; the driving chip repeatedly displays the N sub-frames in a one-by-one display mode within the residual time period of the N groups of first display time, and repeatedly displays 2 at most Q-S 1 time.
In an embodiment of the present invention, the sub-step S704-2 may specifically include the following implementation steps:
the driving chip distributes the N sub-frames to N groups of first display time one by one for display; under each group of first display time, the driving chip is distributed to the group of first displaysSub-frame display with time display 2 at most Q-S Next, the process is repeated.
In one embodiment of the present invention, a frame time is (2) S /N)*T GCLK *P*N*Z+T other P N Z, wherein P is the number of lines of the LED lamp connected with the driving chip, T other The other times except the first display time are set for each group of total time, and each group of total time is one frame time/N; when T is other When equal to 0, Z is equal to 2 Q-S 。
For the related description of the above embodiments, reference is made to the foregoing description, which is not repeated herein.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
The technical solutions provided by the present invention are described in detail above, and the principle and the implementation manner of the present invention are described in this document by using specific examples, and the description of the above examples is only for assisting understanding of the present invention, and the content of the present description should not be construed as limiting the present invention. While various modifications of the illustrative embodiments and applications herein will be apparent to those skilled in the art, it is not desired to be exhaustive or exhaustive that all such modifications and variations are within the scope of the invention.

Claims (10)

1. A driving chip of an LED display screen is characterized in that,
the maximum gray scale bit number of the driving chip is K, and the driving chip is configured to:
under the condition that the gray scale bit number S of the display data is less than or equal to the maximum gray scale bit number K of the driving chip, dividing the display data into N subframes according to the current user configuration information of the system, and displaying each subframe within one frame time at most by 2 Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is not less than Q and not more than K.
2. The LED display screen driving chip according to claim 1,
the driver chip is configured to:
scattering total gray scale time corresponding to the current actual gray scale bit number of the driving chip into N groups of first display time, wherein each group of first display time is (2) Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip; wherein the second display time of each sub-frame is (2) S /N)*T GCLK ；
Distributing the N subframes to N groups of the first display time for display, wherein each subframe displays 2 at most Q-S Next, the process is repeated.
3. The LED display screen driving chip of claim 2, wherein the allocating the N subframes to N groups of the first display time for displaying comprises:
1/2 preceding N sets of said first display times Q-S In the time period, firstly, the N subgroups areThe frames are displayed one by one for 1 time;
repeatedly displaying the N sub-frames in a one-by-one display mode within the residual time periods of the N groups of the first display time, and repeatedly displaying 2 at most Q-S 1 time.
4. The LED display screen driving chip of claim 2, wherein the allocating the N subframes to N groups of the first display time for displaying comprises:
distributing the N sub-frames to N groups of first display time in a one-to-one corresponding mode for display;
displaying the sub-frames allocated to the display in each group of the first display time at most 2 Q-S Next, the process is repeated.
5. The LED display screen driving chip according to any one of claims 2 to 4,
one frame time ═ 2 S /N)*T GCLK *P*N*Z+T other P N Z, wherein P is the number of lines of the LED lamp connected with the driving chip, T other The other time except the first display time is set for each group of total time, and each group of total time is one frame time/N;
when T is other When 0, Z is 2 Q-S 。
6. An LED display screen driving assembly is characterized in that the driving assembly comprises a controller and at least one driving chip, the controller is connected with the driving chips through data lines, the driving chips are cascaded through the data lines, and the driving chips are the LED display screen driving chips as claimed in any one of claims 1 to 5;
the controller is configured to: receiving display data with gray scale digit S and current user configuration information transmitted by a system, and transmitting the display data and the user configuration information to the drive chip;
the driver chip is configured to: when S is less than or equal to the drivingUnder the condition of the maximum gray scale digit K of the chip, dividing the display data into N subframes according to the user configuration information, and displaying each subframe within one frame time at most 2 Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is not less than Q and not more than K.
7. The LED display screen driver assembly of claim 6, wherein the system is connected to the driver assembly and a user terminal, the user terminal configured to:
displaying a configuration interface of the system; the user configuration information is generated by the user terminal aiming at the received trigger operation on the configuration interface;
and transmitting the user configuration information and the input display data to the system.
8. An LED display screen, characterized in that the LED display screen comprises a display terminal and the LED display screen driving assembly according to any one of claims 6 to 7, wherein the driving assembly is connected with the display terminal.
9. A data refreshing method applied to the LED display screen driving assembly according to any one of claims 6-7, the method comprising the following steps:
a controller in the driving component receives display data with gray scale digit S and current user configuration information transmitted by a system, and transmits the display data and the user configuration information to a driving chip in the driving component;
the driving chip divides the display data into N subframes according to the user configuration information under the condition that S is less than or equal to the maximum gray scale digit K of the driving chip, and displays each subframe at most 2 within one frame time Q-S And Q is the current actual gray scale digit of the driving chip determined according to the user configuration information, and S is not less than Q and not more than K.
10. The data refresh method of claim 9, further comprising:
the driving chip breaks up the total gray scale time corresponding to the current actual gray scale bit number of the driving chip into N groups of first display time, and each group of first display time is (2) Q /N)*T GCLK ，T GCLK Is the unit gray scale time of the driving chip;
the driving chip divides the display data into N subframes according to the user configuration information, and displays each subframe in a frame time at most 2 Q-S Secondly, the method comprises the following steps:
the driving chip divides the display data into N sub-frames according to the user configuration information, and the second display time corresponding to each sub-frame is (2) S /N)*T GCLK ；
The drive chip distributes the N sub-frames to N groups of first display time for display, and each sub-frame displays 2 at most Q-S Next, the process is carried out.
CN202210926365.1A 2022-08-03 2022-08-03 LED display screen, driving chip, driving assembly and data refreshing method thereof Pending CN115101007A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115631720A (en) * 2022-12-22 2023-01-20 成都利普芯微电子有限公司 LED display screen driving chip and LED display screen
CN117079587A (en) * 2023-10-16 2023-11-17 长春希达电子技术有限公司 Active Micro-LED uniformity compensation method and display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115631720A (en) * 2022-12-22 2023-01-20 成都利普芯微电子有限公司 LED display screen driving chip and LED display screen
CN117079587A (en) * 2023-10-16 2023-11-17 长春希达电子技术有限公司 Active Micro-LED uniformity compensation method and display device
CN117079587B (en) * 2023-10-16 2024-01-09 长春希达电子技术有限公司 Active Micro-LED uniformity compensation method and display device

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