CN109326263B - Display driving method, display driving device and display device - Google Patents
Display driving method, display driving device and display device Download PDFInfo
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Abstract
The application discloses a display driving method, a display driving device and a display device, wherein the display driving method comprises the following steps: acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold; when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold; and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame. The technical scheme of the application can improve the display effect of the static picture.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display driving method, a display driving apparatus, and a display apparatus.
Background
In a display device, in order to improve the display effect, an original display signal directly received from a display signal source is usually subjected to certain processing, such as color optimization, gamma adjustment, jitter reduction, and the like, and a modified display signal obtained after the processing often has a large change compared with the original display signal. In particular, when the display device displays a static picture, due to the difference of the processing procedures, the difference of the corrected display parameters of two adjacent frames in the corrected display signal may be very large, which is inconsistent with the situation that there is no difference or very small difference between the original display parameters of two adjacent frames in the original display signal, and the difference is reflected on the final display picture, and appears as the jitter of the static picture, which results in the deterioration of the display effect.
Disclosure of Invention
The present application mainly aims to provide a display driving method, a display driving device and a display device, which aim to solve the above-mentioned problem of shaking of a static image and improve the display effect.
In order to achieve the above object, the present application provides a display driving method, including:
acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames;
comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold;
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold;
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
Optionally, after the step of comparing the absolute value of the difference between the original display parameters of two adjacent frames at the same position with the first preset threshold, the display driving method further includes the following steps:
when the absolute value of the difference of the original display parameters of two adjacent frames at the same position is greater than a first preset threshold value, keeping the corrected display parameters of the current frame unchanged; or the like, or, alternatively,
after the step of comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with the second preset threshold, the display driving method further includes the steps of:
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is less than or equal to a second preset threshold value, keeping the corrected display parameters of the current frame unchanged.
Optionally, the first preset threshold is less than or equal to the second preset threshold.
Optionally, the step of obtaining the original display parameters before processing and the modified display parameters after processing of two adjacent frames includes:
receiving an original display signal transmitted after primary color processing and encoding according to a preset protocol;
decoding the received display signal according to the preset protocol;
carrying out color processing, gamma processing and dithering processing on the decoded display signal again to obtain a corrected display signal;
and acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames according to the original display signals and the corrected display signals.
Optionally, after the step of comparing the absolute value of the difference between the original display parameters of two adjacent frames at the same position with the first preset threshold, the display driving method further includes the following steps:
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a third preset threshold;
when the absolute value of the difference of the corrected display parameters of two adjacent frames at the corresponding position is greater than a third preset threshold value, generating a prompt signal;
wherein the third preset threshold is greater than the second preset threshold.
To achieve the above object, the present application also proposes a display driving apparatus, which includes a data control element configured to perform the following operations: acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold; when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold; and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
Optionally, the display driving apparatus includes a system-on-chip board and a timing control board, where the system-on-chip board is connected to the display signal source; the time sequence control board is connected with the system-on-chip board, and the data control element is arranged on the time sequence control board.
Optionally, the system-on-chip board includes a first color processing element and an encoding element, the first color processing element is connected to the display signal source, and the first color processing element is configured to perform preliminary color processing on an original display signal received from the display signal source; the encoding component is connected to the first color processing component, and the encoding component is configured to encode the preliminary color processed display signal according to a predetermined protocol.
Optionally, the timing control board includes a decoding element, a second color processing element, a gamma element, a dithering processing element, and a frame buffer, the decoding element is connected to the system-on-chip board, and the decoding element is configured to decode a display signal received from the system-on-chip board according to a preset protocol; the second color processing element is connected with the decoding element and is configured to perform color processing again on the decoded display signal; the gamma element is connected with the second color processing element and is configured to perform gamma processing on the display signals subjected to the secondary color processing; the dithering processing element is connected with the gamma element and is configured to dither the gamma-processed display signal to generate modified display parameters of the current frame; the frame buffer area is connected with the decoding element and is set to store the original display parameters and the corrected display parameters of the previous frame; the data control element is coupled to the decoding element, the dithering element, and the frame buffer to obtain original display parameters of a current frame from the decoding element, modified display parameters of the current frame from the dithering element, and original display parameters and modified display parameters of a previous frame from the frame buffer, respectively.
To achieve the above object, the present application further proposes a display device, which includes a display panel and a display driving device, the display driving device including a data control element configured to perform the following operations: acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold; when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold; and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position is greater than a second preset threshold value, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame, wherein the display driving device is connected with the display panel and is set to drive the display of the display panel.
In the technical scheme of the application, the display driving method comprises the following steps: acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold; when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold; and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame. In the application, whether the picture displayed at the moment is a static picture is judged by comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold, when the absolute value of the difference of the original display parameters of the two adjacent frames is less than or equal to the first preset threshold, the picture displayed at the moment is a static picture, whether the corrected display parameters have large changes is further judged by comparing the absolute value of the difference of the corrected display parameters of the two adjacent frames at the corresponding position with a second preset threshold, when the absolute value of the difference of the corrected display parameters of the two adjacent frames is greater than the second preset threshold, the corrected display parameters corresponding to the static picture are large in change and are likely to cause picture jitter, at the moment, the corrected display parameters of the current frame are the corrected display parameters of the previous frame, namely, the corrected display parameters of the previous frame are used for replacing the corrected display parameters of the current frame, therefore, the final displayed picture is still and is consistent with the original display signal, the picture jitter is avoided, and the display effect is improved.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an exemplary display driver;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a display driving method according to the present application;
FIG. 3 is a schematic diagram of a timing control board according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an embodiment of a display device according to the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In one example, the display driving apparatus is configured as shown in fig. 1, and includes a System On Chip (SOC) board 100 'and a timing control board (TCON) 200', wherein an arrow represents a flowing direction of a display signal. During the operation of the display driving apparatus, the SOC100 ' receives an original display signal from a display signal source, the original display signal is processed by the first color processing element 110 ', and is encoded in the encoding element 120 ' according to a predetermined protocol, so as to facilitate transmission. The first frame buffer 130 'may store the original display parameters for a frame and the display parameters processed by the first color processing element 110' for invocation. The transmission of signals between the SOC100 'and the TCON 200' is performed according to a preset protocol. After receiving the display signal, the decoding element 210 'in the TCON 200' decodes the display signal according to the predetermined protocol to restore the display signal. Further, the display signal is subjected to color processing by the second color processing element 220 ', gamma correction by the gamma element 230 ', and dithering by the dithering element 240 ', resulting in a modified display signal. The modified display signal is further driven and enhanced by the driving element 250' and then output to drive the display of the picture. While a second frame buffer 260 'in TCON 200' may store modified display parameters for a frame for invocation. It can be seen that when the original display signal is processed into a modified display signal, a large change often occurs, which may cause a still image to be jittered.
The application provides a display driving method, which determines the corrected display parameters of a current frame according to the change conditions of the corrected display parameters of two adjacent frames in a static picture so as to avoid the flicker of the static picture and improve the display effect.
In an embodiment of the present application, as shown in fig. 2, the display driving method includes the following steps:
s100, acquiring original display parameters before processing two adjacent frames and corrected display parameters after processing;
wherein the original display parameters are obtained from an original display signal directly from the display signal source, and the modified display parameters are obtained from a processed modified display signal. In order to save the buffer space, only the original display parameters and the modified display parameters of the whole display picture of the current frame and the previous frame can be temporarily stored, and the buffered original display parameters and the modified display parameters are continuously updated in a covering manner along with the display.
S200, comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold;
and judging whether the displayed picture is a static picture or not by determining the change condition of the original display parameters of two adjacent frames at the same position. Specifically, the absolute value of the difference between the original display parameters at each position in two adjacent frames and a first preset threshold value can be respectively compared to ensure the accuracy of judgment; or a certain number of typical positions or random positions are selected from the display picture for comparison, so that the comparison process is simplified, and the processing efficiency is improved.
Step S310, when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is smaller than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold;
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to the first preset threshold, specifically, the absolute value of the difference between all the compared original display parameters may be less than or equal to the first preset threshold; or, in consideration of possible fluctuation, when the absolute value of the difference between a certain number of or more original display parameters is less than or equal to the first preset threshold, the current picture is considered to be a still picture. It should be noted that the static picture is not strictly constant, but the picture with small change can be classified into the static picture. When the static picture is displayed, the absolute value of the difference between the corrected display parameters of the two adjacent frames at the corresponding positions is further compared with a second preset threshold value so as to judge whether the processing process of the original display signal has a great influence on the relationship between the display parameters of the two adjacent frames. The corresponding position may be completely consistent with the position selected when the change condition of the original display parameter is judged, or may not be consistent with the position selected when the change condition of the original display parameter is judged, but it should be noted that the corrected display parameters of two adjacent frames are necessarily at the same position, so that the corrected display parameters are comparable. Similarly, the corrected display parameters at each position may be compared, or a number of representative positions or random positions may be selected for comparison.
And step S410, when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
When the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, it indicates that the corrected display parameters have changed greatly with time under the condition that the original display parameters have not changed or changed little with time, so that, in order to avoid the jitter of the picture, the corrected display parameters of the current frame are modified into the corrected display parameters of the previous frame. In other words, in the above situation, the display is continued with the modified display parameters of the previous frame, thereby avoiding the jitter of the picture and improving the display effect.
In a specific example, it is assumed that the original display parameter before the current frame is processed at the same position is a, the corrected display parameter after the processing is b, the original display parameter before the previous frame is processed is a ', and the corrected display parameter after the processing is b', where Δ 1 ═ a-a '|, and Δ 2 ═ b-b' |. When Δ 1 is equal to 0, that is, a and a 'are consistent, if Δ 2>2, it is considered that the corrected display parameters obtained after the original display parameters are processed have a large change, and flicker of the picture may be caused, and the corrected display parameters of the current frame are changed from b to b', that is, the corrected display parameters of the previous frame are selected to drive and display, so as to avoid flicker.
In the present embodiment, the display driving method includes the steps of: acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames; comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold; when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold; and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame. Judging whether the displayed picture is a static picture or not by comparing the absolute value of the difference between the original display parameters of two adjacent frames at the same position with a first preset threshold, judging whether the corrected display parameters have large changes or not by comparing the absolute value of the difference between the original display parameters of two adjacent frames at the corresponding position with a second preset threshold, indicating that the corrected display parameters corresponding to the static picture have large changes and possibly causing picture jitter when the absolute value of the difference between the corrected display parameters of two adjacent frames is larger than the second preset threshold, namely, replacing the corrected display parameters of the current frame with the corrected display parameters of the previous frame, therefore, the final displayed picture is still and is consistent with the original display signal, the picture jitter is avoided, and the display effect is improved.
In an embodiment, after step S200, the display driving method further includes the steps of:
step S320, when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is greater than a first preset threshold, keeping the modified display parameters of the current frame unchanged.
That is, when there is a large change in the display frame itself, the display parameter correction of the current frame may be directly output to drive the display without considering the problem of jitter in the still frame, i.e., without further comparing the changes of the display parameter correction of two adjacent frames at the corresponding positions. Of course, in the comparison process, the changes of the original display parameters of two adjacent frames at each position may be compared, or a certain number of typical positions or random positions may be selected for comparison, so as to simplify the comparison process and improve the processing efficiency.
In a specific example, if Δ 1 is calculated to be large, that is, if the difference between a' and a is large, the variation corresponding to the picture is large, and at this time, the modified display parameter b may be directly output to drive the display without changing the modified display parameter.
Or, when the display screen is a static screen, after the step of comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with the second preset threshold, the display driving method further includes the steps of:
and step S420, when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position is less than or equal to a second preset threshold value, keeping the corrected display parameters of the current frame unchanged.
That is to say, although the display screen is a static screen, if the change of the corrected display parameters of two adjacent frames at the corresponding positions obtained after the processing is not large, the display can also be directly driven and displayed by the corrected display parameters of the current frame, and particularly in a relatively static screen with slow change, the processing method can ensure smooth transition of the screen while reducing jitter, and is helpful for improving the display effect. Similarly, the corrected display parameters at the corresponding positions may be compared, or a number of typical positions or random positions may be selected for comparison.
In a specific example, if Δ 1 is calculated to be 0, that is, a' and a are consistent, the display corresponds to the display of the still picture, and if Δ 2 is calculated to be 0, the corrected display parameter b may be directly output to drive the display without changing the corrected display parameter.
In the above embodiment, the first preset threshold is less than or equal to the second preset threshold. For a static picture, certain redundancy can be given to the corrected display parameters to ensure the processing effect on the original display parameters. Of course, in order to effectively avoid the flicker, it should be noted that the second preset threshold value cannot be set too large either. The first preset threshold and the second preset threshold may be set according to actual requirements, and the following table shows a specific setting manner (assuming that the maximum gray scale value is 255, the first preset threshold and the second preset threshold are represented by gray scale values):
| first preset threshold | Second preset threshold |
| 0 | 2 |
| 1 | 3 |
| 2 | 4 |
| 3 | 6 |
In one embodiment, step S100 includes:
step S110, receiving an original display signal transmitted after primary color processing and encoding according to a preset protocol;
wherein, the preliminary color processing and the encoding according to the preset protocol are usually implemented in the SOC, and the SOC is directly connected with the display signal source. The preliminary color processing can improve the color of the display screen, and the encoding is performed according to a preset protocol to facilitate the transmission of the display signal from the SOC to the TCON.
Step S120, decoding the received display signal according to a preset protocol;
and after the TCON receives the original display signal which is transmitted after the preliminary color processing and the coding according to the preset protocol, decoding according to the preset protocol to realize the restoration of the display signal. It should be noted that the original display signal directly obtained from the display signal source usually has little change until this decoding, so that in the actual processing, the signal obtained after decoding can be directly used as the original display signal to perform the subsequent comparison and processing.
Step S130, carrying out color processing, gamma processing and dithering processing on the decoded display signal again to obtain a corrected display signal;
the display effect is improved by performing color processing again on the decoded display signal to improve color vividness and the like. The gamma processing is further performed to compensate for the non-linear characteristic of the display device, thereby realizing distortion-free display. The dithering process can realize the display of more gray scales, so that the transition of the display picture is smoother. And obtaining a corrected display signal after the secondary color processing, the gamma processing and the dithering processing.
And step S140, acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames according to the original display signals and the corrected display signals.
The original display signal and the corrected display signal reflect the display parameters which change along with time, so that the original display parameters before processing and the corrected display parameters after processing of two adjacent frames can be obtained according to the original display signal and the corrected display signal to be further processed.
In an embodiment, after step S200, the display driving method further includes the steps of:
step S330, when the absolute value of the difference between the original display parameters of two adjacent frames is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of the two adjacent frames with a third preset threshold;
step S430, when the absolute value of the difference of the corrected display parameters of two adjacent frames is greater than a third preset threshold, a prompt signal is generated;
and the third preset threshold is greater than the second preset threshold.
In this embodiment, when the absolute value of the difference between the original display parameters of two adjacent frames is smaller than or equal to the first preset threshold, in order to avoid that the processing process of the original display signal has a large deviation and the modified display parameters of two adjacent frames of the still picture have a large change all the time, the absolute value of the difference between the modified display parameters of two adjacent frames is compared with the third preset threshold. When the absolute value of the difference between the corrected display parameters of two adjacent frames is greater than a third preset threshold, it is indicated that a problem may exist in the processing process at this time, that is, a certain link or links in color processing, gamma processing or dithering have a large deviation, a prompt signal is generated so as to perform maintenance.
In the above embodiments, after the final corrected display parameters of the current frame are obtained, overdrive processing may be further performed on the corrected display parameters to accelerate the response speed of the liquid crystal in the liquid crystal display device, so as to achieve driving enhancement and improve the display effect.
As shown in fig. 3, the present application also proposes a display driving apparatus, which includes a data control element 210, the data control element 210 being configured to perform the following operations:
acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames;
comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold;
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold;
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
The data control unit 210 may be a microprocessor, for performing the operations such as the above operations and modifications. Wherein the original display parameters are obtained from an original display signal directly from the display signal source, and the modified display parameters are obtained from a processed modified display signal. In order to save the buffer space, only the original display parameters and the modified display parameters of the whole display picture of the current frame and the previous frame can be temporarily stored, and the buffered original display parameters and the modified display parameters are continuously updated in a covering manner along with the display. And judging whether the displayed picture is a static picture or not by determining the change condition of the original display parameters of two adjacent frames at the same position. Specifically, the absolute value of the difference between the original display parameters at each position in two adjacent frames and a first preset threshold value can be respectively compared to ensure the accuracy of judgment; or a certain number of typical positions or random positions are selected from the display picture for comparison, so that the comparison process is simplified, and the processing efficiency is improved. When the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to the first preset threshold, specifically, the absolute value of the difference between all the compared original display parameters may be less than or equal to the first preset threshold; or, in consideration of possible fluctuation, when the absolute value of the difference between a certain number of or more original display parameters is less than or equal to the first preset threshold, the current picture is considered to be a still picture. It should be noted that the static picture is not strictly constant, but the picture with small change can be classified into the static picture. When the static picture is displayed, the absolute value of the difference between the corrected display parameters of the two adjacent frames at the corresponding positions is further compared with a second preset threshold value so as to judge whether the correction process has great influence on the relationship between the display parameters of the two adjacent frames. The corresponding position may be completely consistent with the position selected when the change condition of the original display parameter is judged, or may not be consistent with the position selected when the change condition of the original display parameter is judged, but it should be noted that the corrected display parameters of two adjacent frames are necessarily at the same position, so that the corrected display parameters are comparable. Similarly, the corrected display parameters at each position may be compared, or a number of representative positions or random positions may be selected for comparison. When the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, it indicates that the corrected display parameters have changed greatly with time under the condition that the original display parameters have not changed or changed little with time, so that, in order to avoid the jitter of the picture, the corrected display parameters of the current frame are modified into the corrected display parameters of the previous frame. In other words, in the above situation, the display is continued with the modified display parameters of the previous frame, thereby avoiding the jitter of the picture and improving the display effect.
In one embodiment, as shown in fig. 3, the display driving apparatus includes an SOC (not shown) and a TCON200, the SOC being connected to a display signal source; the TCON200 is connected to the SOC, and the data control element 210 is provided on the TCON200, wherein an arrow indicates a flowing direction of the display signal. By improving the TCON200, it is helpful to fully utilize the processing capability of other elements in the TCON200, and to realize integration between the data control element 210 and other elements, thereby reducing the cost of the display device.
Specifically, the SOC comprises a first color processing element and a coding element, the first color processing element is connected with the display signal source, and the first color processing element is configured to perform preliminary color processing on an original display signal received from the display signal source; the encoding component is coupled to the first color processing component, and the encoding component is configured to encode the preliminary color processed signal according to a predetermined protocol. The preliminary color processing and the encoding according to the preset protocol are both realized in the SOC, and the SOC is directly connected with the display signal source. The preliminary color processing can improve the color of the display screen, and the encoding is performed according to a preset protocol to facilitate the transmission of the display signal from the SOC to the TCON.
TCON200 includes a decode element 220, a second color processing element 230, a gamma element 240, a dither processing element 250, and a frame buffer 260. The decoding element 220 is coupled to the SOC, and the decoding element 220 is configured to decode a display signal received from the SOC according to a predetermined protocol. After receiving the original display signal transmitted after the preliminary color processing and the encoding according to the preset protocol, the TCON200 decodes the original display signal according to the preset protocol to restore the display signal. It should be noted that the original display signal directly obtained from the display signal source usually has little change until this decoding, so that in the actual processing, the signal obtained after decoding can be directly used as the original display signal to perform the subsequent comparison and processing. That is, in fig. 3, the frame buffer 260 reads the original display parameters and the modified display parameters of the previous frame directly from the decoding element 220 for storage, and similarly, the data control element 210 also reads the original display parameters of the current frame directly from the decoding element 220 instead of reading from the display signal source or SOC. This arrangement helps simplify the connection and packaging structure of the display driving apparatus. The second color processing component 230 is coupled to the decoding component 220, the second color processing component 230 being arranged to perform a further color processing on the decoded display signal. The display effect is improved by performing color processing again on the decoded display signal to improve color vividness and the like. The gamma element 240 is connected to the second color processing element 230, and the gamma element 240 is configured to perform gamma processing on the color-processed display signal again, and the gamma processing is performed to compensate for the non-linear characteristic of the display device, so as to realize distortion-free display. The dithering component 250 is coupled to the gamma component 240, and the dithering component 250 is configured to dither the gamma-processed display signal to generate the modified display parameters of the current frame, so that more gray levels can be displayed by dithering to make the transition of the display image smoother. Data control element 210 is coupled to decoding element 220, dithering element 250, and frame buffer 260 to obtain original display parameters of a current frame from decoding element 220, modified display parameters of the current frame from dithering element 250, and original display parameters and modified display parameters of a previous frame from frame buffer 260, respectively, and perform comparison and modification operations.
In the above embodiments, the overdrive element 270 may further perform overdrive processing on the corrected display parameters to accelerate the response speed of the liquid crystal in the liquid crystal display device, so as to enhance the driving and improve the display effect.
As shown in fig. 4, the present application also proposes a display device, which includes a display panel 300; and a display driving device connected to the display panel 300, the display driving device being configured to drive a display of the display panel. The specific structure of the display driving device refers to the above embodiments, and since the display device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here. Specifically, the display panel may be a liquid crystal display panel or the like. The SOC100 may be disposed on a motherboard of a display signal source such as a television.
The above are only alternative embodiments of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents made by the contents of the specification and the drawings of the present application, or directly/indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. A display driving method, characterized by comprising:
acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames;
comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold;
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold;
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
2. The display driving method according to claim 1, wherein after the step of comparing the absolute value of the difference between the original display parameters of two adjacent frames at the same position with a first preset threshold, the display driving method further comprises the steps of:
when the absolute value of the difference of the original display parameters of two adjacent frames at the same position is greater than a first preset threshold value, keeping the corrected display parameters of the current frame unchanged; or the like, or, alternatively,
after the step of comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with the second preset threshold, the display driving method further includes the steps of:
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is less than or equal to a second preset threshold value, keeping the corrected display parameters of the current frame unchanged.
3. The display driving method according to claim 1 or 2, wherein the first preset threshold is less than or equal to the second preset threshold.
4. The display driving method according to claim 1 or 2, wherein the step of obtaining the original display parameters before processing and the modified display parameters after processing of two adjacent frames comprises:
receiving an original display signal transmitted after primary color processing and encoding according to a preset protocol;
decoding the received display signal according to the preset protocol;
carrying out color processing, gamma processing and dithering processing on the decoded display signal again to obtain a corrected display signal;
and acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames according to the original display signals and the corrected display signals.
5. The display driving method according to claim 1 or 2, wherein after the step of comparing the absolute value of the difference between the original display parameters of two adjacent frames at the same position with a first preset threshold, the display driving method further comprises the steps of:
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a third preset threshold;
when the absolute value of the difference of the corrected display parameters of two adjacent frames at the corresponding position is greater than a third preset threshold value, generating a prompt signal;
wherein the third preset threshold is greater than the second preset threshold.
6. A display driving apparatus comprising a data control element, characterized in that the data control element is arranged to:
acquiring original display parameters before processing and corrected display parameters after processing of two adjacent frames;
comparing the absolute value of the difference of the original display parameters of two adjacent frames at the same position with a first preset threshold;
when the absolute value of the difference between the original display parameters of two adjacent frames at the same position is less than or equal to a first preset threshold, comparing the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding position with a second preset threshold;
and when the absolute value of the difference between the corrected display parameters of two adjacent frames at the corresponding positions is greater than a second preset threshold, modifying the corrected display parameter of the current frame into the corrected display parameter of the previous frame.
7. The display driving device according to claim 6, wherein the display driving device comprises:
the system-on-chip board is connected with a display signal source; and
and the time sequence control board is connected with the system-on-chip board, and the data control element is arranged on the time sequence control board.
8. The display driving apparatus according to claim 7, wherein the system-on-chip board comprises:
a first color processing element connected to the display signal source, the first color processing element configured to perform preliminary color processing on an original display signal received from the display signal source; and
an encoding element coupled to the first color processing element, the encoding element configured to encode the preliminary color processed display signal according to a predetermined protocol.
9. The display driving device according to claim 7, wherein the timing control board comprises:
a decoding component coupled to the system-on-chip board, the decoding component configured to decode a display signal received from the system-on-chip board according to a predetermined protocol;
a second color processing element coupled to the decoding element, the second color processing element configured to perform a second color processing on the decoded display signal;
a gamma element coupled to the second color processing element, the gamma element configured to gamma process the re-color processed display signal;
a dithering component, coupled to the gamma component, configured to dither the gamma processed display signal to generate modified display parameters for the current frame; and
a frame buffer coupled to the decoding element, the frame buffer configured to store original display parameters and modified display parameters of a previous frame;
the data control element is coupled to the decoding element, the dithering element, and the frame buffer to obtain original display parameters of a current frame from the decoding element, modified display parameters of the current frame from the dithering element, and original display parameters and modified display parameters of a previous frame from the frame buffer, respectively.
10. A display device comprising a display panel and a display driving device, the display driving device being connected to the display panel, the display driving device being arranged to drive a display of the display panel, characterized in that the display driving device is a display driving device according to any one of claims 6 to 9.
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| CN201811522749.7A CN109326263B (en) | 2018-12-12 | 2018-12-12 | Display driving method, display driving device and display device |
| PCT/CN2019/123086 WO2020119558A1 (en) | 2018-12-12 | 2019-12-04 | Display driving method, display driving device, and display device |
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| JP2000013742A (en) * | 1998-06-19 | 2000-01-14 | Fujitsu General Ltd | Digital image recording system |
| US8068148B2 (en) * | 2006-01-05 | 2011-11-29 | Qualcomm Incorporated | Automatic flicker correction in an image capture device |
| JP5022812B2 (en) * | 2007-08-06 | 2012-09-12 | ザインエレクトロニクス株式会社 | Image signal processing device |
| CN102202224B (en) * | 2011-06-22 | 2013-03-27 | 清华大学 | Caption flutter-free method and apparatus used for plane video stereo transition |
| CN103218978A (en) * | 2012-01-18 | 2013-07-24 | 联咏科技股份有限公司 | Display driving device and driving method of display panel |
| CN104270561A (en) * | 2014-08-01 | 2015-01-07 | Tcl通讯（宁波）有限公司 | Method for automatically regulating Camera frame rate of mobile terminal and mobile terminal |
| CN108174238A (en) * | 2018-01-16 | 2018-06-15 | 北京数码视讯科技股份有限公司 | Enhance the method, apparatus and Video Codec of video frame contrast |
| CN109326263B (en) * | 2018-12-12 | 2020-10-16 | 惠科股份有限公司 | Display driving method, display driving device and display device |
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| CN109345997A (en) * | 2018-12-12 | 2019-02-15 | 惠科股份有限公司 | Display driving method, display driving device and display device |
| CN109345997B (en) * | 2018-12-12 | 2022-04-01 | 惠科股份有限公司 | Display driving method, display driving device and display device |
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