CN115273734A - Scanning control circuit and method - Google Patents

Scanning control circuit and method Download PDF

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Publication number
CN115273734A
CN115273734A CN202210985965.5A CN202210985965A CN115273734A CN 115273734 A CN115273734 A CN 115273734A CN 202210985965 A CN202210985965 A CN 202210985965A CN 115273734 A CN115273734 A CN 115273734A
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subframes
basic sub
sub
divided
pixel unit
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Granted
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CN202210985965.5A
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CN115273734B (en
Inventor
胡渊
郭安华
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Fuman Microelectronics Group Co ltd
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Fuman Microelectronics Group 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • 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
    • 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
    • G09G2320/06—Adjustment of display parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The invention discloses a scanning control circuit and a method, which are applied to a scanning display screen, wherein the scanning control circuit comprises: the logic control module is configured to receive display data of the scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame of picture, and the gray scale data corresponds to the lighting time of the pixel units; the storage module is connected with the output end of the logic control module and is configured to store display data and output gray scale data of the pixel unit; the balanced pulse module is connected with the output end of the storage module and is configured to acquire gray scale data of the pixel unit and divide the lighting time interval of the pixel unit into a plurality of subframes so as to control the pixel unit in the scanning display screen to work. The method and the device can balance the lighting time of each subframe, uniformly display the lighting time, and improve the display effect of the scanning display screen.

Description

Scanning control circuit and method
Technical Field
The invention relates to the technical field of scanning control, in particular to a scanning control circuit and a method.
Background
In the conventional LED display, a row driving circuit and a column driving circuit are usually provided, and both drive a pixel unit in the LED display together, in order to achieve a good display effect, a frame of picture is usually divided into a plurality of subframes, taking fig. 1 as an example, the time required for displaying a frame of data by a pixel unit in the LED display is T, within the time T, the time for lighting the pixel unit is 6clk, it is assumed that the lighting time 6clk is divided into three subframes SF for display, there is usually a method a, three subframes are sequentially divided into 2 (n-1) clk, n represents a few subframes, the sum of 2 (n-1) clk in each subframe is exactly equal to 6clk, and when n is 3, the 2 (n-1) combination can achieve 0 to 7; in the method B, the lighting time 6clk is equally divided in each sub-frame.
Although the two modes can avoid the phenomenon that the pixel units are normally off and normally on and improve the display effect of the LED display screen, the two modes still have the phenomenon that the pixel units are not uniformly lighted.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a scanning control circuit and a scanning control method, which can balance the lighting time of each subframe, uniformly display the lighting time and improve the display effect of a scanning display screen.
In a first aspect:
the invention provides a scanning control circuit, which is applied to a scanning display screen and comprises:
the logic control module is configured to receive display data of the scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame of picture, and the gray scale data corresponds to the lighting duration of the pixel units;
the storage module is connected with the output end of the logic control module and is configured to store the display data and output the gray scale data of the pixel unit;
the balanced pulse module is connected with the output end of the storage module and is configured to acquire gray scale data of the pixel unit and divide the lighting time of the pixel unit into a plurality of subframes at intervals so as to control the pixel unit in the scanning display screen to work.
Preferably, the plurality of subframes include a first subframe and a second subframe, the first subframe is divided into the lighting time duration, the second subframe is not divided into the lighting time duration, and at least one second subframe exists between any two first subframes.
Preferably, the lighting time duration is divided into M basic sub-time durations, the M basic sub-time durations are divided into N first subframes according to a first preset sequence, M and N are equal to N, and M is greater than or equal to 1, N is greater than or equal to 2.
Preferably, if M is greater than N, after the N basic sub-durations are respectively divided into N first subframes, the M-N basic sub-durations are repeatedly divided into N subframes according to the first preset sequence; and repeating the steps until all the basic sub-time lengths are divided into the N first sub-frames.
Preferably, the N first subframes are divided into a first display set and a second display set according to a display sequence, and the first preset sequence includes: the M basic sub-durations alternately divide the first sub-frame in the first display set and the second display set.
Preferably, the lighting time length is divided into X basic sub-time lengths, the X basic sub-time lengths are divided into Y third subframes according to a second preset sequence, X = KY + Z, wherein X, Y, K, Z belongs to N, X is larger than or equal to 1, and Y is larger than or equal to 2;
if K is 0, setting X basic sub-durations at X sub-frames in Y third sub-frames at intervals;
if K is larger than or equal to 1, on the basis that KY basic sub-durations are averagely divided into Y third subframes, Z basic sub-durations are arranged in Z subframes of the Y third subframes at intervals.
Preferably, the plurality of subframes include a fourth subframe and a fifth subframe, and the lighting period is divided into a plurality of basic sub-periods; and respectively arranging at least one basic sub-time length in a plurality of fourth subframes according to a second preset sequence, and if the plurality of basic sub-time lengths are still remained, respectively arranging at least one basic sub-time length in a plurality of fifth subframes according to a third preset sequence.
Preferably, after the at least one basic sub-duration is arranged in the fifth subframes according to the third preset order, if the plurality of basic sub-durations are still left, the at least one basic sub-duration is arranged in the fourth subframes according to the second preset order again, and so on until all the basic sub-durations are arranged.
Preferably, the storage module comprises two buffers.
In a second aspect:
the invention provides a scanning control method, which is applied to a scanning display screen and comprises the following steps:
receiving display data of the scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame, and the gray scale data corresponds to the lighting duration of the pixel unit;
storing the display data and outputting the gray scale data of the pixel unit; and
and acquiring gray scale data of the pixel unit, and dividing the lighting time interval of the pixel unit into a plurality of subframes so as to control the pixel unit in the scanning display screen to work.
The invention has the beneficial effects that:
the lighting time of each subframe is balanced, the lighting time is uniformly displayed, and the display effect of the scanning display screen is improved.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings used in the detailed description or the prior art description will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of a conventional lighting system;
FIG. 2 is a block diagram of an application system according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a division of lighting durations according to an embodiment of the present invention;
FIG. 4 is another diagram illustrating the division of the lighting time duration according to the embodiment of the present invention;
fig. 5 is another schematic diagram of the lighting time division according to the embodiment of the present invention;
fig. 6 is another schematic diagram of the division of the lighting time duration according to the embodiment of the present invention;
fig. 7 is another schematic diagram of the lighting time division according to the embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
The first embodiment is as follows:
an embodiment of the present invention provides a scan control circuit 100, as shown in fig. 2, which is applied to a scan display screen, and the scan control circuit 100 may include a logic control module 11, a storage module 12, and a balanced pulse module 13. The logic control module 11 is configured to receive display data of the scanning display screen, where the display data includes gray scale data of each pixel unit in each frame of picture, and the gray scale data corresponds to a lighting time of the pixel unit. The storage module 12 is connected to the output end of the logic control module 11, and the storage module 12 is configured to store display data and output gray scale data of a pixel unit. The balanced pulse module 13 is connected to an output end of the storage module 12, and the balanced pulse module 13 is configured to obtain gray scale data of the pixel unit and divide a lighting time period of the pixel unit into a plurality of subframes at intervals to control the pixel unit in the scanning display screen to work.
Specifically, the logic control module 11 may include a shift register and a row and column control circuit. The number of rows and columns of the scanning display screen can be set according to actual needs, and in this embodiment, the number of rows and columns of the scanning display screen is set to be 3, as shown in fig. 2. The memory module 12 may output the gray scale data of the pixel unit in the order of scanning. The memory module 12 may include data memory, registers, and memory control circuitry. Specifically, the number of buffers may be set according to actual conditions, and preferably may be 2. The balanced pulse module 13 may obtain the gray scale data of the pixel units from the storage module 12 according to the rows, and when the balanced pulse module 13 obtains the gray scale data of each pixel unit in a certain row, the balanced division algorithm is adopted to divide the gray scale data of each pixel unit into each sub-frame, so as to control the corresponding pixel unit to be turned on through the analog circuit 200.
The scan control circuit 100 provided in this embodiment can be applied to a scan display panel as shown in fig. 2, where the row control module 300 is used for scanning the pixel unit array row by row, and when the row control module 300 scans a certain row of pixel units, a driving voltage can be provided for the row of pixel units. The analog circuit 200 is used for receiving signals from the scan control circuit 100, and the analog circuit 200 is controlled by the scan control circuit 100 to provide driving currents for scanning each column of pixel units in the display screen. It should be noted that the scanning display screen may be a common cathode display screen, a common anode display screen, etc., and the specific type and structure of the scanning display screen are not particularly limited.
In this embodiment, the balanced pulse module 13 may divide the lighting time duration of the pixel unit into a plurality of subframes at intervals, specifically, may divide the lighting time duration of the pixel unit into a plurality of subframes, and there is also a subframe without the lighting time duration between the subframes with the lighting time duration. In addition, when the lighting time of the pixel unit is less than or equal to the preset time, the balanced pulse module 13 may divide the lighting time of the pixel unit into a plurality of subframes at intervals; when the lighting time length of the pixel unit is longer than the preset time length, the balanced pulse module 13 may divide the lighting time length of the preset time length into a plurality of subframes at intervals, then divide the remaining lighting time length into subframes having no lighting time length, if there is still remaining, divide the remaining lighting time length into a plurality of subframes again, and so on. It is to be noted that the sum of the lighting periods in the plurality of sub-frames is substantially equal to the lighting period corresponding to the gradation data of the pixel unit.
In this embodiment, by dividing the lighting time duration corresponding to the gray scale data at intervals, the situation that the lighting time duration is divided in a plurality of continuous subframes in a certain frame and the lighting time duration is not divided in a plurality of continuous subframes in another part can be avoided, so that the pixel units are more uniformly turned on and off in each frame period, and the display effect of the scanning display screen is effectively improved.
In this embodiment, blanking may be performed after each subframe ends, or blanking may be performed before each subframe begins, so as to reduce the residual shadow and further improve the display effect.
In some embodiments, the plurality of subframes may include a first subframe and a second subframe, the first subframe being divided into the lighting durations, the second subframe not being divided into the lighting durations, there being at least one second subframe between any two first subframes. The number of the first sub-frame and the second sub-frame can be set according to actual conditions.
In this embodiment, under the condition that the number of subframes divided per frame is consistent, if the lighting time length is longer, the number of second subframes between every two first subframes may be smaller; the shorter the lighting time period is, the greater the number of second subframes between every two first subframes may be. Therefore, the balance of the lighting time length corresponding to the gray scale data in the whole frame period is improved.
In some embodiments, the lighting time duration may be divided into M basic sub-time durations, the M basic sub-time durations are divided into N first subframes according to a first preset order, M, N are equal to N and M is greater than or equal to 1, N is greater than or equal to 2.
In this embodiment, the first preset order may be preset. According to the sequence of subframe display, the first preset sequence may be that the 1 st basic sub-duration is divided into a middle subframe in the N first subframes, the 2 nd basic sub-duration is divided into a first subframe close to the middle subframe, and so on, and the M basic sub-durations are diffused into other first subframes from near to far from the middle subframe by taking the middle subframe as the first. The first preset order may also be to divide the M basic sub-durations into N first sub-frames according to the order of sub-frame display. According to the sequence of subframe display, the first preset sequence may also be that the 1 st basic sub-duration is divided into a middle subframe of the N first subframes, the 2 nd basic sub-duration is divided into a first subframe far away from the middle subframe, and so on, the M basic sub-durations are diffused into other first subframes in the sequence from far to near from the middle subframe by taking the middle subframe as the first. The first predetermined order may not be particularly limited herein.
In addition, the basic sub-duration in this embodiment may be a lighting duration corresponding to the minimum gray-scale data, or may be a lighting duration greater than or less than the lighting duration corresponding to the minimum gray-scale data, that is, the basic sub-duration may be set based on actual requirements.
In some embodiments, if M is greater than N, after the N basic sub-durations are respectively divided into N first subframes, the M-N basic sub-durations are repeatedly divided into N subframes according to a first preset sequence; and so on until all the basic sub-time lengths are divided into N first sub-frames.
In this embodiment, the M basic sub-durations may be repeatedly divided into N first sub-frames according to a first preset sequence. In order to understand the technical solution of the present embodiment more clearly, the following examples are listed:
dividing a frame display period into 9 subframes, taking the 1 st, 3 rd, 5 th, 7 th and 9 th subframes as first subframes, taking the 2 nd, 4 th, 6 th and 8 th subframes as second subframes, dividing the lighting time into 13 basic sub-durations, wherein M is 13 and N is 5, and assuming that a first preset sequence is to divide the M basic sub-durations into N first subframes according to the display sequence of the subframes. Then, the 1 st to 5 th basic sub-durations are divided into the 1 st, 3 rd, 5 th, 7 th and 9 th sub-frames, the 6 th to 10 th basic sub-durations are divided into the 1 st, 3 th, 5 th, 7 th and 9 th sub-frames, and finally the 11 th to 13 th basic sub-durations are divided into the 1 st, 3 th and 5 th sub-frames, so that all basic sub-durations are divided into 5 first sub-frames.
In some embodiments, the N first subframes are divided into a first display set and a second display set according to a display sequence, where the first preset sequence includes: the M basic sub-durations alternately divide the first sub-frame in the first display set and the second display set.
In this embodiment, the alternating division of the M basic sub-periods into the first sub-frames in the first display set and the second display set may be: and after one basic sub-duration is divided into the first subframe in the first display set, dividing one basic sub-duration in the remaining basic sub-durations into the first subframe in the second display set, and circulating. In order to understand the technical solution of the present embodiment more clearly, the following examples are listed:
dividing a frame display period into 16 subframes, taking the 1 st, 4 th, 7 th, 10 th, 13 th and 16 th subframes as first subframes, taking the 2 nd, 3 th, 5 th, 6 th, 8 th, 9 th, 11 th, 12 th, 14 th and 15 th subframes as second subframes, dividing the 1 st, 4 th and 7 th subframes into a first display set, and dividing the 10 th, 13 th and 16 th subframes into a second display set according to the sequence of subframe display. Dividing the lighting time length into 3 basic sub-time lengths, wherein M is 3, N is 6, then dividing the 1 st basic sub-time length into the 1 st sub-frame, dividing the 2 nd basic sub-time length into the 10 th sub-frame, and dividing the 3 rd basic sub-time length into the 4 th sub-frame. Dividing the lighting time length into 11 basic sub-time lengths, wherein M is 11 and N is 6, then dividing the 1 st to 6 th basic sub-time lengths into the 1 st, 4 th, 7 th, 10 th, 13 th and 16 th sub-frames, dividing the 7 th basic sub-time length into the 1 st sub-frame, dividing the 8 th basic sub-time length into the 10 th sub-frame, dividing the 9 th basic sub-time length into the 4 th sub-frame, dividing the 10 th basic sub-time length into the 13 th sub-frame, and dividing the 11 th basic sub-time length into the 7 th sub-frame.
In some other embodiments, the N first subframes may not be divided into a first display set and a second display set according to the display sequence, and the first preset sequence includes: the M basic sub-durations alternately divide the first sub-frame in the first display set and the second display set. At this time, the manner in which the first subframe divides the first display set and the second display set may be preset, for example, the first subframe near the middle portion is divided into the first display set, and the first subframe far from the middle portion is divided into the second display set, where the specific manner of dividing the first display set and the second display set is not particularly limited.
In some embodiments, the lighting time duration is divided into X basic sub-time durations, the X basic sub-time durations are divided into Y third subframes according to a second preset sequence, X = KY + Z, wherein X, Y, K, Z belongs to N, X is greater than or equal to 1, and Y is greater than or equal to 2; if K is 0, setting X basic sub-durations in X sub-frames of the Y third sub-frames at intervals; if K is larger than or equal to 1, on the basis that KY basic sub-durations are averagely divided into Y third sub-frames, Z basic sub-durations are arranged in Z sub-frames in the Y third sub-frames at intervals.
In this embodiment, the second preset sequence may be the same as the first preset sequence, or may be different from the first preset sequence, and may be specifically set based on actual requirements.
In order to more clearly describe the operation of the above-mentioned X basic sub-durations and Y third sub-frames, the following examples are listed:
setting the display time length of one frame of picture as T, and dividing one frame of picture into a plurality of subframes SF for display.
Example one: and K is 0.
(1) As shown in pattern D of fig. 3, the lighting period is set to 5clk (the lighting period is divided into 5 basic sub-periods). One frame is divided into twelve subframes, each lighting time clk is divided into first, third, fifth, seventh and ninth subframes SF, and the lighting time is not allocated to the rest subframes SF.
(2) As shown in manner E of fig. 3, the lighting period is set to 5clk (the lighting period is divided into 5 basic sub-periods). One frame is divided into nine subframes, each lighting time clk is divided into first, third, fifth, seventh and nine subframes SF, and the lighting time is not allocated to the rest subframes.
Example two: k is more than or equal to 1.
(1) As shown in manner C of fig. 3, the lighting period is set to 5clk (the lighting period is divided into 5 basic sub-periods). A frame is divided into three subframes, the lighting time duration 2clk therein is divided into a first subframe 1SF, the lighting time duration clk therein is divided into a second subframe 2SF, and the lighting time duration 2clk therein is divided into a third subframe 3SF. In the method C, the lighting period 3clk is divided into three subframes, and then the lighting period 2clk is set in the first subframe 1SF and the third subframe 3SF at intervals.
(2) As shown in pattern F of fig. 4, the lighting period is set to 10clk (the lighting period is divided into 10 basic sub-periods). One frame is divided into six subframes, each lighting time length 2clk is divided into first, second, third and five subframes SF, and each lighting time length clk is divided into fourth and six subframes SF. In the known method F, the lighting time duration 6clk is firstly divided into six subframes on an average basis, then the lighting time duration 3clk is set in the first subframe 1SF, the third subframe 3SF and the fifth subframe 5SF at intervals, and finally the lighting time duration 1clk is set in one of the second subframe SF, the fourth subframe SF and the six subframes SF.
(3) As shown in pattern G of fig. 4, the lighting period is set to 10clk (the lighting period is divided into 10 basic sub-periods). Dividing a frame into six subframes, dividing each lighting time length clk into a second subframe SF, a fourth subframe SF and a six subframe SF respectively, dividing each lighting time length 2clk into a third subframe SF and a five subframe SF respectively, and dividing a lighting time length 3clk into a first subframe SF. In the method G, the lighting time period 6clk is divided into six subframes, and then the lighting time period 3clk is set in the first subframe 1SF, the third subframe 3SF, and the fifth subframe 5SF at intervals.
In this embodiment, the fixed period of displaying each frame may be a duration T, and the gray scale data of the pixel unit is obtained to obtain the lighting duration represented by the gray scale data, that is, to obtain the pulse duration for controlling the conduction of the pixel unit.
In this embodiment, the plurality of subframes include a fourth subframe and a fifth subframe, and the lighting period is divided into a plurality of basic sub-periods. As shown in fig. 6, at least one basic sub-duration is respectively arranged in the fourth subframes according to the second preset order, and if there is still a remainder in the basic sub-durations, at least one basic sub-duration is respectively arranged in the fifth subframes according to the third preset order.
In order to more clearly understand the technical solution of the present embodiment, the following examples are listed:
dividing a frame display period into 16 subframes, taking the 1 st, 4 th, 7 th, 10 th, 13 th and 16 th subframes as fourth subframes, taking the 2 nd, 5 th, 8 th, 11 th and 14 th subframes as a batch of fifth subframes, and taking the 3 rd, 6 th, 9 th, 12 th and 15 th subframes as another batch of fifth subframes according to the sequence of subframe display. The lighting time duration is divided into 9 basic sub-durations, then 6 of the basic sub-durations are divided into 1 st, 4 th, 7 th, 10 th, 13 th and 16 th sub-frames, and 3 of the basic sub-durations are divided into 2 nd, 5 th and 8 th sub-frames. Dividing the lighting time length into 14 basic sub-time lengths, and dividing the lighting time length into 9 basic sub-time lengths, then dividing 6 basic sub-time lengths thereof into the 1 st, 4 th, 7 th, 10 th, 13 th and 16 th sub-frames, dividing the other 5 basic sub-time lengths thereof into the 2 nd, 5 th, 8 th, 11 th and 14 th sub-frames, and dividing 3 basic sub-time lengths thereof into the 3 rd, 6 th and 9 th sub-frames.
As shown in the pattern H of fig. 5, the lighting period is set to 7clk (the lighting period is divided into 7 basic sub-periods). Dividing one frame into nine subframes, alternately setting 6clk lighting time lengths in the first, third, fifth, seventh, ninth and eleventh subframes according to a preset interval, and setting the rest 1clk lighting time lengths in one of the second, fourth, sixth, eighth, tenth and twelve subframes.
In some embodiments, as shown in fig. 7, after at least one basic sub-duration is arranged in the fifth subframes according to the third preset order, if the basic sub-durations are still remained, at least one basic sub-duration is arranged in the fourth subframes according to the second preset order again, and so on until all the basic sub-durations are arranged.
In this embodiment, the third preset sequence may be the same as the first preset sequence, or may be different from the first preset sequence, which may be specifically set based on actual requirements.
In order to more clearly understand the technical solution of the present embodiment, the following examples are listed:
dividing a frame display period into 9 subframes, taking the 1 st, 3 rd, 5 th, 7 th and 9 th subframes as fourth subframes, taking the 2 nd, 4 th, 6 th and 8 th subframes as fifth subframes, dividing the lighting time into 13 basic sub-durations, assuming that a third preset sequence is to divide a plurality of basic sub-durations into a plurality of fourth subframes according to the display sequence of the subframes, and a second preset sequence is to divide a plurality of basic sub-durations into a plurality of fifth subframes according to the display sequence of the subframes. Then, 5 of the basic sub-durations are divided into 1 st, 3 rd, 5 th, 7 th and 9 th subframes, the other 4 of the basic sub-durations are divided into 2 nd, 4 th, 6 th and 8 th subframes, and finally the 4 basic sub-durations are divided into 1 st, 3 th, 5 th and 7 th subframes, thereby completing the arrangement of all the basic sub-durations.
The balance division algorithm in this embodiment may alternately and equally distribute the lighting durations in each subframe as much as possible, the balance may be that the lighting durations of the subframes are relatively close, or that the lighting durations between the subframes with the same time difference are relatively close, as shown in fig. 6 and 7, which are two alternative examples, at this time, all the lighting durations are set in each subframe in an alternating manner, or may be distributed in other manners. In addition, the present embodiment preferentially keeps the difference between the lighting durations of the adjacent subframes small, and can achieve a better display effect.
Example two:
the embodiment provides a scanning control method, which is applied to a scanning display screen and comprises the following steps:
receiving display data of a scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame, and the gray scale data corresponds to the lighting duration of the pixel unit;
storing display data and outputting gray scale data of pixel units; and
the method comprises the steps of obtaining gray scale data of a pixel unit, and dividing the lighting time interval of the pixel unit into a plurality of sub-frames so as to control the pixel unit in a scanning display screen to work. Specifically, a balanced division algorithm may be employed to divide the lighting time duration of the pixel unit into a plurality of sub-frames at intervals.
The number of rows and columns of the scanning display screen can be set according to actual needs, and in this embodiment, the number of rows and columns of the scanning display screen is set to be 3, as shown in fig. 2. In this embodiment, the gray scale data of the pixel units may be obtained by rows, and when the gray scale data of each pixel unit in a certain row is obtained, the gray scale data of each pixel unit is divided into sub-frames by using a balanced division algorithm to control the pixel units in the scanning display screen to work.
In some embodiments, the plurality of subframes includes first subframes and second subframes, the first subframes are divided into the lighting durations, the second subframes are not divided into the lighting durations, and at least one second subframe exists between any two first subframes. The number of the first sub-frame and the second sub-frame can be set according to actual conditions.
The lighting time length is divided into M basic sub-time lengths, the M basic sub-time lengths are divided into N first subframes according to a first preset sequence, M and N belong to N, M is larger than or equal to 1, and N is larger than or equal to 2.
If M is larger than N, after the N basic sub-durations are respectively divided into N first subframes, the M-N basic sub-durations are repeatedly divided into N subframes according to a first preset sequence; and so on until all the basic sub-time lengths are divided into N first sub-frames.
In some embodiments, the N first subframes are divided into a first display set and a second display set according to a display sequence, where the first preset sequence includes: the M basic sub-durations alternately divide the first sub-frame in the first display set and the second display set.
In some embodiments, the lighting time duration is divided into X basic sub-time durations, the X basic sub-time durations are divided into Y third subframes according to a second preset sequence, X = KY + Z, wherein X, Y, K, Z belongs to N, X is greater than or equal to 1, and Y is greater than or equal to 2;
if K is 0, setting X basic sub-durations in X sub-frames of the Y third sub-frames at intervals;
if K is larger than or equal to 1, on the basis that KY basic sub-durations are averagely divided into Y third sub-frames, Z basic sub-durations are arranged in Z sub-frames in the Y third sub-frames at intervals.
In some embodiments, the duration T required for displaying each frame is a fixed period, and the gray-scale data of the pixel unit is obtained to obtain the lighting duration represented by the gray-scale data, that is, the pulse duration for controlling the on state of the pixel unit.
In some embodiments, the plurality of subframes includes a fourth subframe and a fifth subframe, and the lighting period is divided into a plurality of basic sub-periods. As shown in fig. 6, at least one basic sub-duration is respectively arranged in the fourth subframes according to the second preset order, and if there is still a remainder in the basic sub-durations, at least one basic sub-duration is respectively arranged in the fifth subframes according to the third preset order.
As shown in fig. 7, after at least one basic sub-duration is arranged in the fifth subframes according to the third preset sequence, if there is still a remainder in the basic sub-durations, at least one basic sub-duration is arranged in the fourth subframes according to the second preset sequence, and so on, until all the basic sub-durations are arranged.
The balanced segmentation algorithm in this embodiment may alternately and equally disperse the lighting durations in each subframe as much as possible, the balancing may be that the lighting durations of the subframes are relatively close, or that the lighting durations between the subframes with the same time difference are relatively close, as shown in fig. 6 and 7, which are two alternative examples, at this time, all the lighting durations are alternately set in the subframes, or may be distributed in other manners. In addition, in the embodiment, the difference between the lighting durations of the adjacent subframes is preferentially kept small, so that a better display effect can be achieved.
It should be noted that the technical solution of the scan control method provided in this embodiment is the same as the technical solution of the scan control circuit provided in the embodiment of the present invention, and for specific limitations of the scan control method, reference may be made to the above limitations of the scan control circuit, and details are not described here again to avoid repetition.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being covered by the appended claims and their equivalents.

Claims (10)

1. A scanning control circuit, characterized in that, applied to scanning display screen, includes:
the logic control module is configured to receive display data of the scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame of picture, and the gray scale data corresponds to the lighting duration of the pixel units;
the storage module is connected with the output end of the logic control module and is configured to store the display data and output the gray scale data of the pixel unit;
the balanced pulse module is connected with the output end of the storage module and is configured to acquire gray scale data of the pixel unit and divide the lighting time of the pixel unit into a plurality of subframes at intervals so as to control the pixel unit in the scanning display screen to work.
2. The scan control circuit of claim 1, wherein the plurality of subframes includes a first subframe and a second subframe, the first subframe being partitioned into a lighting duration and the second subframe not being partitioned into a lighting duration, there being at least one second subframe between any two of the first subframes.
3. The scan control circuit of claim 2, wherein the illumination time period is divided into M basic sub-time periods, the M basic sub-time periods are divided into N first subframes according to a first preset order, M, N ∈ N, M ≧ 1, and N ≧ 2.
4. The scan control circuit of claim 3, wherein if M is greater than N, after N basic sub-durations are respectively divided into N first subframes, M-N basic sub-durations are repeatedly divided into N subframes according to the first predetermined sequence; and repeating the steps until all the basic sub-time lengths are divided into the N first sub-frames.
5. The scan control circuit of claim 3, wherein the N first subframes are divided into a first display set and a second display set according to a display sequence, and the first preset sequence includes: the M basic sub-durations alternately divide the first sub-frame in the first display set and the second display set.
6. The scan control circuit of claim 1, wherein the lighting time period is divided into X basic sub-time periods, the X basic sub-time periods are divided into Y third subframes according to a second preset sequence, X = KY + Z, wherein X, Y, K, Z ∈ N and X ≧ 1, Y ≧ 2;
if K is 0, setting X basic sub-durations in X sub-frames of Y third sub-frames at intervals;
if K is larger than or equal to 1, on the basis that KY basic sub-time lengths are averagely divided into Y third subframes, Z basic sub-time lengths are arranged in Z subframes of the Y third subframes at intervals.
7. The scan control circuit of claim 1, wherein the plurality of subframes includes a fourth subframe and a fifth subframe, and wherein the lighting period is divided into a plurality of basic sub-periods; and respectively arranging at least one basic sub-time length in a plurality of fourth subframes according to a second preset sequence, and if the plurality of basic sub-time lengths are still remained, respectively arranging at least one basic sub-time length in a plurality of fifth subframes according to a third preset sequence.
8. The scan control circuit of claim 7, wherein after at least one of the basic sub-durations is arranged in a third preset order in the fifth subframes, if there is still a plurality of basic sub-durations remaining, at least one of the basic sub-durations is arranged in a second preset order in the fourth subframes again, and so on until all the basic sub-durations are arranged.
9. The scan control circuit of any one of claims 1 to 8, wherein the storage module comprises two buffers.
10. A scanning control method is characterized in that the scanning control method is applied to a scanning display screen and comprises the following steps:
receiving display data of the scanning display screen, wherein the display data comprises gray scale data of each pixel unit in each frame, and the gray scale data corresponds to the lighting duration of the pixel unit;
storing the display data and outputting gray scale data of the pixel unit; and
and acquiring gray scale data of the pixel unit, and dividing the lighting time interval of the pixel unit into a plurality of subframes so as to control the pixel unit in the scanning display screen to work.
CN202210985965.5A 2022-08-16 2022-08-16 Scanning control circuit and method Active CN115273734B (en)

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