CN117475952A - Spread spectrum method for eliminating water ripple, display panel and storage medium - Google Patents
Spread spectrum method for eliminating water ripple, display panel and storage medium Download PDFInfo
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- 238000001228 spectrum Methods 0.000 title claims abstract description 200
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
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Abstract
The invention discloses a spreading method for eliminating water ripple, a display panel and a storage medium, wherein the spreading method for eliminating water ripple comprises the following steps: acquiring a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame; resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal, and outputting the clock signal to the grid chip so that the grid chip controls the same row of pixel driving circuits to have the same charging time under different frames; the technical scheme of the invention aims to eliminate the water ripple of the display panel while reducing the electromagnetic interference of the display panel.
Description
Technical Field
The present invention relates to the field of display panels, and in particular, to a method for eliminating water ripple, a display panel, and a storage medium.
Background
Currently, in order to reduce electromagnetic interference (EMI) generated by higher harmonics in digital signals and clock signals inside and between electronic systems, spread spectrum clocks (Spread Spectrum Clock Generator, SSCG) are generally used to disperse the energy of the clock signals. However, spreading the clock signal also causes a problem, and the larger the spread spectrum amplitude of the spread spectrum clock is, the better the effect of reducing electromagnetic interference is. However, the frequency change of the clock can affect the charging time of the panel, and the panel with liquid crystal sensitive to the charging time is easy to generate the water ripple rolling phenomenon.
Disclosure of Invention
The invention mainly aims to provide a frequency spreading method for eliminating water ripple, a display panel and a storage medium, and aims to eliminate water ripple of the display panel while reducing electromagnetic interference of the display panel.
In order to achieve the above objective, the display panel of the present invention includes a gate chip, a source chip, and a driving array comprising a plurality of pixel driving circuits; the grid chip and the source chip are respectively and electrically connected with the driving array; the grid chip and the source chip are respectively used for accessing a clock signal and jointly charging the pixel driving circuits corresponding to each row according to the clock signal; the spreading method for eliminating the water ripple comprises the following steps:
acquiring a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame;
and resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal, and outputting the clock signal to the grid chip, so that the grid chip controls the same row of pixel driving circuits to have the same charging time under different frames.
In some embodiments, the resetting the first spread spectrum signal specifically includes:
acquiring a first position in a period of a first spread spectrum signal matched with the initial time of a previous frame;
and controlling the position in the period of the first spread spectrum signal matched with the initial time of the current frame to be the same as the first position.
In some embodiments, the performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal specifically includes:
acquiring the initial time of a current frame;
and adjusting the first spread spectrum signal to enable the period starting time of the first spread spectrum signal to be matched with the initial time of the current frame, and then performing spread spectrum.
In some embodiments, the performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal specifically includes:
acquiring a clock signal after the frequency spreading of the clock signal of the previous frame;
and spreading the clock signal of the current frame by using the reset first spreading signal so as to synchronize the starting time of the clock signal after the current frame is spread and the starting time of the clock signal after the previous frame is spread.
In some embodiments, the method for spreading a frequency band to remove moire further comprises:
acquiring a second spread spectrum signal, wherein the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal;
and alternately performing spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal, and outputting the clock signals to the grid chip.
In some embodiments, the method for spreading a frequency band to remove moire further comprises:
resetting the first spread spectrum signal when the previous alternating period is ended by taking the preset line number as an alternating period;
and performing spread spectrum processing on the clock signal in the current alternating period according to the reset first spread spectrum signal.
The invention also provides a display panel which comprises a time sequence control circuit, a grid electrode chip, a source electrode chip and a driving array formed by a plurality of pixel driving circuits;
the time sequence control circuit is respectively and electrically connected with the grid chip and the source chip, and the grid chip and the source chip are respectively and electrically connected with the driving array;
the time sequence control circuit is used for respectively outputting clock signals to the grid chip and the source chip so that the grid chip and the source chip charge the pixel driving circuits corresponding to each row according to the clock signals;
the time sequence control circuit is also used for obtaining a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame according to a signal waveform of the first spread spectrum signal output during the previous frame; and the time sequence control circuit is also used for resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal and outputting the clock signal to the grid chip so that the grid chip controls the same charging time of the pixel driving circuit in the same row under different frames.
In some embodiments, the timing control circuit is further configured to obtain a second spread spectrum signal according to the waveform of the first spread spectrum signal after reset, where the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal; and the time sequence control circuit is also used for alternately performing spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal and outputting the clock signals to the grid chip.
In some embodiments, the timing control circuit is further configured to reset the first spread spectrum signal at the end of a previous alternating period with a preset number of rows as an alternating period; and according to the reset first spread spectrum signal, performing spread spectrum processing on the clock signal in the current alternating period, and outputting the clock signal to a grid chip.
The invention also provides a storage medium comprising the method for eliminating the water ripple.
According to the technical scheme, the original starting position of the first spread spectrum signal of the current frame is obtained by obtaining the first spread spectrum signal for performing spread spectrum processing on the clock signal of the previous frame, so that the first spread spectrum signal is reset, the starting position of the first spread spectrum signal of the current frame is adjusted, the clock signal of the current frame is subjected to spread spectrum processing according to the reset first spread spectrum signal and then is output to a grid chip, and the grid chip controls the charging time of the pixel driving circuits in the same row in two frames to be the same. And the first spread spectrum signal adopted by each subsequent frame is adjusted by analogy, so that the starting position of each frame is the same, clock signals received by the pixel driving circuits in the same row in different frames are dithered the same, the charging time of the pixel driving circuits in different frames is the same, and the generation of the water ripple phenomenon is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an embodiment of a method for spreading spectrum to eliminate water ripple according to the present invention;
FIG. 2 is a flowchart illustrating an embodiment of the step S200 of the present invention;
FIG. 3 is a flowchart illustrating a step S200 according to another embodiment of the present invention;
FIG. 4 is a flowchart illustrating a step S200 according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of another embodiment of a method for spreading spectrum to eliminate water ripple according to the present invention;
FIG. 6 is a schematic diagram of another embodiment of a method for spreading spectrum to eliminate water ripple according to the present invention;
FIG. 7 is a schematic diagram of a display panel according to an embodiment of the invention;
FIG. 8 is a comparison of one embodiment of a spread spectrum method of removing water ripple according to the present invention;
fig. 9 is a signal waveform diagram of an embodiment of a spread spectrum method for removing water ripple according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a spread spectrum method for eliminating water ripple.
Referring to fig. 1 and 7, in one embodiment, the display panel includes a gate chip 520, a source chip 530, and a driving array 540 composed of a plurality of pixel driving circuits; the gate chip 520 and the source chip 530 are electrically connected to the driving array 540, respectively; the gate chip 520 and the source chip 530 are respectively used for accessing a clock signal, and charge the pixel driving circuits corresponding to each row according to the clock signal; the spreading method for eliminating the water ripple comprises the following steps:
s100, acquiring a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame;
it should be noted that, referring to fig. 6, when the display is in normal operation, the gate chip 520 controls each row of pixel driving circuits to be turned on according to the received clock signal, and when the pixel driving circuits are turned on, the source chip 530 charges the pixel driving circuits of the row according to the data signal output by the data line, at this time, since the frequency of the clock signal is fixed, and the charging time is determined by the relative timing of the clock signal and the data signal, the charging time of each row of pixel driving circuits in different frames is the same.
However, in the process of spreading the clock signal, the timing control circuit 510 outputs the same first spread signal without interruption, so that after the first frame is finished, the first spread signal is likely to not finish outputting for one period, so that when the second frame spreads, the first spread signal corresponding to the starting position of the first spread signal is different from the first spread signal corresponding to the starting position of the first frame, and in the long term, the starting position of each frame is different, so that the clock signal jitter received by the pixel driving circuit in the same row in different frames is different, and further the charging time of the pixel driving circuit in different frames is also different, thereby generating the water ripple phenomenon.
In this embodiment, when the timing control circuit 510 of the display panel spreads the clock signal of the previous frame, the clock signal needs to be modulated according to the waveform of the first spread signal, so as to avoid that the first spread signal adopted by each subsequent frame is different, and when the spreading of the previous frame is completed, the first spread signal after completing the spreading of the previous frame needs to be interrupted, so as to obtain the parameters of the first spread signal of the previous frame, such as the time point in a period when the first spread signal starts, the time point in a period when the first spread signal ends, and the like, so that the timing control circuit 510 can adjust the first spread signal according to the parameters of the previous frame at the beginning of the current frame.
S200, resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal, and outputting the clock signal to the gate chip 520, so that the gate chip 520 controls the same row of pixel driving circuits to have the same charging time under different frames.
In this embodiment, in order to make the charge time of each row of pixel driving circuits be the same as the charge time of the previous frame in the current frame under the driving of the gate chip 520, the clock signal in the current frame needs to be reset in the current frame start time sequence control circuit 510, the jitter mode after the current frame is the same as that of the previous frame, for example, the frequency of the clock signal in the previous frame starts to gradually shift left in the first row after the current frame is spread, the frequency starts to gradually shift right in the 135 th row, the jitter of the frequency starts to gradually shift left in the first row after the current frame resets, the jitter mode in the 135 th row starts to gradually shift right in the current frame, and so on, so that the jitter mode of the clock signal in each frame is the same, and thus the gate chip 520 is driven to control the charge time of the same pixel driving circuit under different frames.
According to the technical scheme, the original starting position of the first spread spectrum signal of the current frame is obtained by obtaining the first spread spectrum signal for performing spread spectrum processing on the clock signal of the previous frame, so that the first spread spectrum signal is reset, the starting position of the first spread spectrum signal of the current frame is adjusted, the clock signal of the current frame is subjected to spread spectrum processing according to the reset first spread spectrum signal and then is output to the grid chip 520, and the grid chip 520 controls the charging time of the pixel driving circuits in the same row in two frames to be the same. And the first spread spectrum signal adopted by each subsequent frame is adjusted by analogy, so that the starting position of each frame is the same, the jitter of clock signals received by the pixel driving circuits in the same row in different frames is the same, the charging time of the pixel driving circuits in different frames is the same, and the generation of the water ripple phenomenon is avoided.
Referring to fig. 2 and fig. 7, in an embodiment, the resetting the first spread spectrum signal specifically includes:
s211, acquiring a first position in a period of a first spread spectrum signal matched with the initial time of a previous frame;
s212, controlling the position in the period of the first spread spectrum signal matched with the initial time of the current frame to be the same as the first position.
In this embodiment, the first position is a preset time point in a period in which the first spread spectrum signal is located.
In order to make the jitter of the clock signals received by the same row of pixel driving circuits in different frames identical, the positions of the corresponding first spread spectrum signals in a period are required to be identical when the clock signals received by the same row of pixel driving circuits in different frames are spread, so that when the current frame starts, the positions of the first spread spectrum signals in the current frame are required to be aligned with the first positions in the previous frame, that is, the preset time point in the period of the first spread spectrum signals in the current frame is required to coincide with the preset time point in the period of the previous frame, for example, the initial time of the first spread spectrum signals in the previous frame is at the peak in the period, and after the first spread spectrum signals are reset, the initial time of the first spread spectrum signals in the current frame is also required to be at the peak in the period.
Referring to fig. 3 and fig. 7, in an embodiment, the performing the spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal and outputting the clock signal to the gate chip 520, so that the gate chip 520 controls the charging time of the same row of pixel driving circuits under different frames to be the same includes:
s221, acquiring the initial time of a current frame;
s222, adjusting the first spread spectrum signal to enable the period starting time of the first spread spectrum signal to be matched with the initial time of the current frame, and then spreading the first spread spectrum signal.
In this embodiment, it is known that the first spread signal is reset before the clock signal of each frame is spread, and the position in the period of the first spread signal matched with the initial time of the current frame is controlled to be the same as the first position, so that when the gate chip and the source chip are driven by the clock signal to charge the pixel circuit, the initial time of each frame can be dithered in the same manner only by matching the period starting time of the first spread signal with the initial time of the current frame, and the spread clock signals are almost the same, so that the pixel driving circuits of each row are driven by the gate chip 520 to keep the charging time in each frame the same.
Referring to fig. 4 and fig. 7, in an embodiment, the performing the spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal and outputting the clock signal to the gate chip 520, so that the gate chip 520 controls the charging time of the same row of pixel driving circuits under different frames to be the same includes:
s223, acquiring a clock signal after the frequency spreading of the clock signal of the previous frame;
s224, spreading the clock signal of the current frame by using the reset first spreading signal so as to synchronize the starting time of the clock signal of the current frame after spreading and the starting time of the clock signal of the previous frame after spreading.
In this embodiment, the initial time of the spread spectrum signal in each frame is the same, and the initial time is finally represented on the clock signal, that is, the clock signal in each frame is dithered in a fixed manner to form the same clock signal, so that when the clock signal is applied to each frame, the charging time of each row of pixel driving circuits in each frame can be kept the same under the driving of the gate chip 520 only by synchronizing the initial time of the clock signal after the current frame of the input gate chip 520 is spread and the initial time of the clock signal after the previous frame is spread.
The spread signal is reset every frame, so that the clock signal starts from the same spread amplitude at the time of spreading. Thus, the same brightness of different frames in the same row can be ensured, and the water wave disappears. However, the brightness of different rows in the same frame is still different, and fixed transverse stripes appear.
To this end, referring to fig. 5 and 7, in an embodiment, the method for spreading the water ripple further includes:
s310, acquiring a second spread spectrum signal, wherein the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal;
s320, alternately performing spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal, and outputting the clock signals to the grid chip.
In this embodiment, the clock signals of different frames may be alternately spread with 1 frame, 2 frames, 3 frames, and other frames as an alternate period, and the specific frame number may be determined by the frame rate of the display and the designer according to the actual effect requirement.
In each alternate period, the timing control circuit 510 of the display panel resets the spread spectrum signal, and obtains the position of the spread spectrum signal in the current alternate period in the alternate period when the previous frame starts, so that the timing control circuit 510 can adjust the spread spectrum signal according to the position of the previous frame when the current frame starts.
In each two adjacent alternate periods, the waveforms of the spread spectrum signals adopted are completely opposite, as shown in fig. 7, the spread spectrum signal depicted by the solid line is taken as a first spread spectrum signal, the spread spectrum signal depicted by the dotted line is taken as a second spread spectrum signal, if the first spread spectrum signal is adopted in the first alternate period, the clock signal of each frame is gradually shifted to the left at first in the first alternate period, and the second spread spectrum signal is adopted in the second alternate period, and the clock signal of each frame is gradually shifted to the right at first in the second alternate period.
The dithering modes of the clock signal in each alternate period are the same, and the dithering modes in every two adjacent alternate periods are opposite, so that the driving gate chip 520 controls the over-charging and under-charging time of the pixel driving circuit in the same row to be even and even counteracted under the average frame number, and the fixed cross stripes and the water waves disappear.
In an embodiment, a frame is used as an alternate period, and the clock signal is alternately spread according to the first spread signal and the second spread signal after reset and output.
In this embodiment, the performing the spread spectrum processing on the clock signal according to the reset first spread spectrum signal and the reset second spread spectrum signal alternately is specifically implemented in that, in the 2N-1 frame, the timing control circuit 510 performs the spread spectrum processing on the clock signal in the current frame according to the pre-stored first spread spectrum signal; and, at the 2N frame, the timing control circuit 510 performs spread spectrum processing on the clock signal under the current frame according to the pre-stored second spread spectrum signal; wherein N is an integer greater than 0.
When the display panel works, if the spreading of the previous frame is completed, the first spreading signal after completing the spreading of the previous frame is interrupted, a time point of the first spreading signal in a period when the previous frame starts is obtained, so that the time sequence control circuit 510 resets the current first spreading signal according to the time point, obtains a second spreading signal with opposite waveforms according to the reset first spreading signal, and performs spreading processing on a line scanning clock signal output by the next frame according to the second spreading signal and outputs the line scanning clock signal.
And when the second spread spectrum signal completes one frame of spread spectrum, acquiring a time point of the second spread spectrum signal in a period when the last frame starts, so that the time sequence control circuit 510 resets the current second spread spectrum signal according to the time point, acquires a first spread spectrum signal with opposite waveforms according to the reset second spread spectrum signal, performs spread spectrum processing on a line scanning clock signal output by the next frame according to the first spread spectrum signal, and outputs the line scanning clock signal.
Referring to fig. 6 to 7, in an embodiment, the method for spreading a frequency band to remove water ripple further includes:
s410, resetting the first spread spectrum signal when the previous alternating period is ended by taking a preset line number as an alternating period;
s420, performing spread spectrum processing on the clock signal in the current alternating period according to the reset first spread spectrum signal, and outputting the clock signal to a grid chip.
In this embodiment, when the display panel works, the first spread spectrum signal is reset once every clock signal of a preset line number, so that charging time between pixel driving circuits of as many lines as possible in one frame is the same, and the number of times of occurrence of cross stripes is reduced.
Referring to fig. 7 to 9, the present invention further provides a display panel, which includes a timing control circuit 510, a gate chip 520, a source chip 530, and a driving array 540 composed of a plurality of pixel driving circuits;
the timing control circuit 510 is electrically connected to the gate chip 520 and the source chip 530, respectively, and the gate chip 520 and the source chip 530 are electrically connected to the driving array 540, respectively;
the timing control circuit 510 is configured to output clock signals to the gate chip 520 and the source chip 530, respectively, so that the gate chip 520 and the source chip 530 charge the pixel driving circuits corresponding to each row together according to the clock signals;
the timing control circuit 510 is further configured to obtain a first spread spectrum signal for performing spread spectrum processing on the clock signal of the previous frame according to the signal waveform of the first spread spectrum signal output at the time of the previous frame; and the timing control circuit 510 is further configured to reset the first spread spectrum signal, spread the clock signal of the current frame according to the reset first spread spectrum signal, and output the spread spectrum signal to the gate chip 520, so that the gate chip 520 controls the same charging time of the pixel driving circuit in the same row under different frames.
In this embodiment, when the spreading of the previous frame is completed, the timing control circuit 510 of the display panel interrupts the first spread signal after completing the spreading of the previous frame, and obtains the parameters of the first spread signal in the previous frame, such as the time point in a period at the beginning, the time point in a period at the end, etc., so that the timing control circuit 510 can adjust the first spread signal at the beginning of the current frame according to the parameters of the previous frame, so that the clock signal in the current frame has the same jitter manner as the previous frame, and the jitter manner of the clock signal in each frame is the same, so that the driving gate chip 520 controls the charging time of the same row of pixel driving circuits under different frames to be the same.
According to the technical scheme, the original starting position of the first spread spectrum signal of the current frame is obtained by obtaining the first spread spectrum signal for performing spread spectrum processing on the clock signal of the previous frame, so that the first spread spectrum signal is reset, the starting position of the first spread spectrum signal of the current frame is adjusted, the clock signal of the current frame is subjected to spread spectrum processing according to the reset first spread spectrum signal and then is output to the grid chip 520, and the grid chip 520 controls the charging time of the pixel driving circuits in the same row in two frames to be the same. And the first spread spectrum signal adopted by each subsequent frame is adjusted by analogy, so that the starting position of each frame is the same, clock signals received by the pixel driving circuits in the same row in different frames are dithered the same, the charging time of the pixel driving circuits in different frames is the same, and the generation of the water ripple phenomenon is avoided.
Referring to fig. 7 to 9, in an embodiment, the timing control circuit 510 is further configured to obtain a second spread spectrum signal according to the waveform of the first spread spectrum signal after reset, where the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal; and, the timing control circuit 510 is further configured to alternately perform spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal, and output the clock signals to the gate chip 520.
In this embodiment, in each alternate period, the timing control circuit 510 of the display panel resets the spread spectrum signal, and obtains the time point of the spread spectrum signal in the current alternate period in a period when the previous frame starts, so that the timing control circuit 510 can adjust the spread spectrum signal at the beginning of the current frame according to the time point of the previous frame.
And at the end of each alternate period, the timing control circuit 510 resets the spread spectrum signal, obtains the spread spectrum signal opposite to the signal according to the spread spectrum signal, and spreads the clock signal of the preset frame number by using the second spread spectrum signal in the current period when the first spread spectrum signal is used in the previous alternate period, and spreads the clock signal of the preset frame number by using the first spread spectrum signal in the current period when the first spread spectrum signal is used in the previous alternate period. The dithering modes of the clock signal in each alternate period are the same, and the dithering modes in every two adjacent alternate periods are opposite, so that the driving gate chip 520 controls the over-charging and under-charging time of the pixel driving circuit in the same row to be even and even counteracted under the average frame number, and the fixed cross stripes and the water waves disappear.
Referring to fig. 7 to 9, in an embodiment, the timing control circuit 510 is further configured to reset the first spread signal at the end of the previous alternating period with a preset number of rows as an alternating period; and spreading the clock signal in the current alternating period according to the reset first spreading signal, and outputting the clock signal to the gate chip 520.
In this embodiment, when the display panel works, the first spread spectrum signal is reset once every clock signal of a preset line number, so that charging time between pixel driving circuits of as many lines as possible in one frame is the same, and the number of times of occurrence of cross stripes is reduced.
The invention also provides a storage medium, which comprises the method for eliminating water ripple, and the specific structure of the method for eliminating water ripple refers to the above embodiment.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The spread spectrum method for eliminating the water ripple of the display panel is characterized in that the display panel comprises a grid chip, a source chip and a driving array consisting of a plurality of pixel driving circuits; the grid chip and the source chip are respectively and electrically connected with the driving array; the grid chip and the source chip are respectively used for accessing a clock signal and jointly charging the pixel driving circuits corresponding to each row according to the clock signal; the spreading method for eliminating the water ripple comprises the following steps:
acquiring a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame;
and resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal, and outputting the clock signal to the grid chip, so that the grid chip controls the same row of pixel driving circuits to have the same charging time under different frames.
2. The method for spreading out water ripple removal of claim 1, wherein said resetting said first spread-spectrum signal specifically comprises:
acquiring a first position in a period of a first spread spectrum signal matched with the initial time of a previous frame;
and controlling the position in the period of the first spread spectrum signal matched with the initial time of the current frame to be the same as the first position.
3. The method for spreading out the ripple cancellation as claimed in claim 1, wherein said performing a spreading process on the clock signal of the current frame according to the reset first spreading signal specifically comprises:
acquiring the initial time of a current frame;
and adjusting the first spread spectrum signal to enable the period starting time of the first spread spectrum signal to be matched with the initial time of the current frame, and then performing spread spectrum.
4. The method for spreading out the ripple cancellation as claimed in claim 1, wherein said performing a spreading process on the clock signal of the current frame according to the reset first spreading signal specifically comprises:
acquiring a clock signal after the frequency spreading of the clock signal of the previous frame;
and spreading the clock signal of the current frame by using the reset first spreading signal so as to synchronize the starting time of the clock signal after the current frame is spread and the starting time of the clock signal after the previous frame is spread.
5. The method of spreading out water ripple as claimed in claim 1, wherein the method of spreading out water ripple further comprises:
acquiring a second spread spectrum signal, wherein the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal;
and alternately performing spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal, and outputting the clock signals to the grid chip.
6. The method of spreading out water ripple as claimed in claim 1, wherein the method of spreading out water ripple further comprises:
resetting the first spread spectrum signal when the previous alternating period is ended by taking the preset line number as an alternating period;
and performing spread spectrum processing on the clock signal in the current alternating period according to the reset first spread spectrum signal, and outputting the clock signal to a grid chip.
7. The display panel is characterized by comprising a time sequence control circuit, a grid electrode chip, a source electrode chip and a driving array formed by a plurality of pixel driving circuits;
the time sequence control circuit is respectively and electrically connected with the grid chip and the source chip, and the grid chip and the source chip are respectively and electrically connected with the driving array;
the time sequence control circuit is used for respectively outputting clock signals to the grid chip and the source chip so that the grid chip and the source chip charge the pixel driving circuits corresponding to each row according to the clock signals;
the time sequence control circuit is also used for obtaining a first spread spectrum signal for performing spread spectrum processing on a clock signal of a previous frame according to a signal waveform of the first spread spectrum signal output during the previous frame; and the time sequence control circuit is also used for resetting the first spread spectrum signal, performing spread spectrum processing on the clock signal of the current frame according to the reset first spread spectrum signal and outputting the clock signal to the grid chip so that the grid chip controls the same charging time of the pixel driving circuit in the same row under different frames.
8. The display panel of claim 7, wherein the timing control circuit is further configured to obtain a second spread spectrum signal according to the waveform of the first spread spectrum signal after reset, wherein the waveform of the first spread spectrum signal is opposite to the waveform of the second spread spectrum signal; and the time sequence control circuit is also used for alternately performing spread spectrum processing on clock signals of different frames according to the reset first spread spectrum signal and the reset second spread spectrum signal and outputting the clock signals to the grid chip.
9. The display panel of claim 8, wherein the timing control circuit is further configured to reset the first spread signal at the end of a previous alternating period with a preset number of rows as alternating periods; and according to the reset first spread spectrum signal, performing spread spectrum processing on the clock signal in the current alternating period, and outputting the clock signal to a grid chip.
10. A storage medium comprising a spread spectrum method of removing water ripple as claimed in any one of claims 1 to 6.
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