CN111462705A - Display panel driving method and display device - Google Patents
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- 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
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Abstract
The application provides a driving method of a display panel and a display device, wherein the display device comprises the display panel and a system chip, a time schedule controller of the display panel receives and caches video data output by the system chip, the time for displaying a frame of picture in the video data of the display panel comprises a frame display stage and a frame idle stage, and the video data comprises first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage; the time sequence controller establishes driving configuration according to the video data, and inserts at least one second video data of a frame idle stage between two temporally adjacent first video data in a frame display stage to establish a video data group combining the first video data and the second video data; the time schedule controller outputs the video data group to each row of sub-pixels, so that the duration of a frame display stage of the display panel for displaying one frame of picture is longer than the duration of a frame display stage of the original frame of picture, and the charging time of each row of sub-pixels of the display panel is increased.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving method of a display panel and a display device.
Background
The lcd device may generally include an lcd panel, which may include a timing Controller (T/CON), a gate driver and a source driver, and a system chip bonded to the lcd panel. The grid driver provides grid scanning signals for the sub-pixels of the liquid crystal display panel, the source driver provides video data for the sub-pixels, when one row of grid scanning signals is turned on, the video data of the corresponding row can be charged into the panel, the corresponding row of the panel can display, and the display effect is closely related to the charging time of the sub-pixels.
With the increase of the frame rate of the display panel, the charging time of the sub-pixels is greatly reduced. Especially for commercial display panels, the commercial display panel is usually in a bar shape at present, the number of display columns is small, the frame rate can reach 240Hz, the charging time of the display panel is reduced, and the display phenomenon similar to water ripple or color cast can be generated when the sub-pixels are insufficiently charged and the gray scale is low.
Therefore, the prior art has defects which need to be solved urgently.
Disclosure of Invention
The application provides a driving method of a display panel and a display device, which can solve the technical problem that a display phenomenon similar to water ripples or color cast exists when a low gray scale is caused by insufficient charging of sub-pixels.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the application provides a driving method of a display panel, wherein the display panel comprises sub-pixels distributed in an array, and the driving method comprises the following steps:
step S1, the timing controller of the display panel receives video data, buffers the video data, and establishes a driving configuration according to the video data, wherein the time for displaying a frame of picture in the video data by the display panel includes a frame display stage and a frame idle stage, and the video data includes first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage;
step S2, the timing controller inserts at least one of the second video data of the frame idle phase into the frame display phase between two temporally adjacent first video data to create a video data group combining the first video data and the second video data;
in step S3, the timing controller outputs the video data set to each of the sub-pixels, so that the duration of the frame display period of the display panel displaying one frame of picture is longer than the duration of the frame display period of the original frame of picture.
In the driving method of the present application, the periods of the second video data inserted between two temporally adjacent first video data in the frame display phase are the same.
In the driving method of the present application, in the step S3, a sum of charging durations of the sub-pixels in each row is greater than a sum of original charging durations corresponding to the sub-pixels in each row.
In the driving method of the present application, a scan line and a data line are disposed on the display panel, the sub-pixels are electrically connected to the scan line and the data line, the scan line provides a gate scan signal to the sub-pixels, and the gate scan signal includes a first scan signal and a second scan signal, and the driving method includes:
and writing the video data group into the sub-pixels in the first scanning signal driving time, and stopping writing the video data group into the sub-pixels in the second scanning signal driving time.
In the driving method of the present application, a first rising edge of the gate scan signal is earlier than a first rising edge of the video data group, and a first falling edge of the gate scan signal is earlier than a first falling edge of the video data group.
In the driving method of the present application, in the first scanning signal driving time, the first video data and the second video data corresponding to a row of the subpixels are written into the subpixels in a sequential order.
In the driving method of the present application, the driving method further includes:
the time sequence controller receives an enabling signal, the time interval between the first falling edge of the grid scanning signal and the first falling edge of the video data group is enabling time, the enabling signal controls the front edge of the grid scanning signal of the current row and controls the back edge of the grid scanning signal of the next row in the enabling time period, and the charging time of the sub-pixels is equal to the driving time of the video data group minus the enabling time.
The application also provides a display device, which comprises a display panel and a system chip, wherein the display panel comprises a time schedule controller, a grid driver, a source driver, a scanning line, a data line and sub-pixels electrically connected with the scanning line and the data line;
the system chip is electrically connected with a time sequence controller of the display panel, the time sequence controller is respectively electrically connected with the grid driver and the source driver, the grid driver is electrically connected with the scanning line, and the source driver is electrically connected with the data line;
the time schedule controller is used for receiving and caching video data output by the system chip, wherein the time for displaying one frame of picture in the video data by the display panel comprises a frame display stage and a frame idle stage, and the video data comprises first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage;
the time sequence controller is further used for inserting at least one piece of second video data of the frame idle stage into the frame display stage between two temporally adjacent pieces of first video data so as to establish a video data group formed by combining the first video data and the second video data;
the time sequence controller is further configured to output the video data sets of the sub-pixels of each row to the source driver, so that a duration of a frame display period of a frame of picture displayed by the display panel is longer than a duration of a frame display period of an original frame of picture.
In the display device of the present application, the periods of the second video data between two adjacent first video data in the frame display phase are the same, and the sum of the charging durations of the sub-pixels in each row is greater than the sum of the original charging durations corresponding to the sub-pixels in each row.
In the display device of the present application, the scan line provides a gate scan signal to the sub-pixel, a first rising edge of the gate scan signal is earlier than a first rising edge of the video data group, and a first falling edge of the gate scan signal is earlier than a first falling edge of the video data group;
the time sequence controller receives an enabling signal output by the system chip, the time interval between the first falling edge of the grid scanning signal and the first falling edge of the video data group is enabling time, the enabling signal controls the front edge of the grid scanning signal of the current row and simultaneously controls the back edge of the grid scanning signal of the next row in the enabling time period, and the charging time of the sub-pixels is equal to the driving time of the video data group minus the enabling time.
The beneficial effect of this application does: according to the driving method and the display device of the display panel, the second video data of the frame idle stage for displaying one frame of picture in the video data are inserted between two adjacent first video data in the frame display stage in terms of time, so that a video data group formed by combining the first video data and the second video data is established, and a new driving configuration is established; the display panel is driven by the new driving configuration, so that the duration of a frame display stage of the display panel for displaying one frame of picture is longer than that of the frame display stage of the original frame of picture, the charging time of each row of sub-pixels is increased, and the phenomena of water ripple and color cast caused by insufficient charging time are improved.
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The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a driving method of a display panel according to an embodiment of the present disclosure;
FIG. 3 is a timing diagram of video data transmission of a frame displayed on the original display panel;
FIG. 4 is a diagram showing the relationship between the timing of the gate scan signal and the video data and the charging time in the original display panel;
FIG. 5 is a timing diagram of video data transmission of a frame displayed on the display panel of the present application;
FIG. 6 is a diagram illustrating a relationship between timing and charging time of gate scan signals and video data in a display panel according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, "/" means "or".
The present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.
At present, commercial display screens are often in a bar shape, the number of rows (V-total) displayed on the commercial display screens is equal to that of a common conventional screen, but the number of columns (V-display) displayed on the commercial display screens is very small, for example, 1125% and 180% are displayed on the commercial display screens. If the driving mode is still the same as that of the common conventional screen, the problem of insufficient charging exists when the frame rate is high, and the display effect is affected.
The present application addresses this problem by providing a display device that may be a liquid crystal display device or an organic light emitting electro-display device. The display device of the present application will be described in detail with reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The display device includes: a display panel 10 and a system-on-chip 20, wherein the system-on-chip 20 is bonded on the display panel 10. The non-display region of the display panel 10 includes a timing controller 101, a gate driver 102, and a source driver 103, and the display region of the display panel 10 includes a plurality of scan lines (G1, G2... Gn) arranged in a horizontal direction, a plurality of data lines (D1, D2... Dn) arranged in a vertical direction, and sub-pixels P electrically connected to the scan lines and the data lines.
The system chip 20 is electrically connected to the timing controller 101 of the display panel 10, and is configured to provide a gate scan signal, video data, an enable signal, and the like to the timing controller 101. The timing controller 101 is electrically connected to the gate driver 102 and the source driver 103, respectively, the gate driver 102 is electrically connected to the scan line, and the source driver 103 is electrically connected to the data line.
In one embodiment, the gate driver 102 may also be a GOA circuit.
The timing controller 101 is configured to receive a plurality of lines of video data output by the system chip 20 and buffer the plurality of lines of video data into a buffer of the timing controller 101. Wherein, the time of one frame of picture in the video data displayed by the display panel 10 includes a frame display stage and a frame idle stage, and the video data includes first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage.
Generally, a frame idle period exists between two adjacent frames of pictures displayed by the display panel, and the video data in the frame idle period is useless data, while the video data in the frame display period is real display data. Due to the fact that the number of columns displayed by the bar screen is small, under the condition that the frame rate is increased, if the traditional driving mode is still adopted, the charging time of each row of sub-pixels can be greatly compressed, and therefore the sub-pixels are insufficiently charged.
In this application, the timing controller 101 will establish a new driving configuration according to the video data, that is, the timing controller 101 is configured to insert at least one line of the second video data of the frame idle phase between two lines of the first video data that are temporally adjacent in the frame display phase to establish a video data set in which the first video data is combined with the second video data. It is to be understood that a line of video data referred to herein refers to video data corresponding to a line of sub-pixels.
The timing controller 101 is further configured to output a multi-level gate scan signal to the gate driver 102, and output the video data sets of the sub-pixels P in each row to the source driver 103, and the source driver 103 inputs the video data sets into the sub-pixels P in the corresponding row through all the data lines under the row-by-row scan of the gate scan signal. According to the method and the device, as part of video data of the frame idle stage of the original frame is advanced to the frame display stage, the time length of the frame display stage of the display panel 10 for displaying the frame is longer than that of the frame display stage of the original frame, and the charging time of the display panel for displaying the frame is further increased.
Since the second video data is inserted after each row of the first video data, the sum of the charging durations of the sub-pixels P in each row is greater than the sum of the original charging durations corresponding to the sub-pixels P in each row.
In this embodiment, the periods of the second video data between two adjacent lines of the first video data in the frame display phase are the same.
In this embodiment, the display panel is a bar screen, that is, the display panel displays the same number of rows as a normal conventional screen, but displays a small number of columns. Of course, in other embodiments the display panel 10 may be a conventional normal screen.
The present application further provides a driving method of the display panel, please refer to fig. 2, the driving method includes the following steps:
step S1, the timing controller of the display panel receives video data, buffers the video data, and establishes a driving configuration according to the video data, where a time for the display panel to display a frame of picture in the video data includes a frame display stage and a frame idle stage, and the video data includes first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage.
Referring to fig. 3, a timing diagram of video data transmission for displaying one frame of picture on the original display panel is shown. The time when the display panel displays one frame of picture in the video data includes a frame display period T1 and a frame idle period T2. The video data includes first video data (1,2,3,4.. n, n is a positive integer) corresponding to the frame display phase T1 and second video data (X1, X2, X3... Xm, m is a positive integer) corresponding to the frame idle phase T2.
Fig. 4 is a diagram showing the relationship between the timing of the gate scan signal and the video data in the original display panel and the charging time. The gate scan signals G' include a first scan signal (e.g., a high level signal) during which the first video data of the corresponding row in the frame display period T1 is written to the sub-pixels, and a second scan signal (e.g., a low level signal) during which the first video data stops being written to the sub-pixels.
Because the delay effect exists on the scanning lines and the data lines, the grid scanning signals transmitted by the scanning lines of two continuous rows are staggered, the video data transmitted by the data lines are staggered, and the picture display is poor. Therefore, the enable signal (OE) is currently used to control the scan pulse width of the scan lines (G1, G2.. Gn), so that the scan line in the previous row is turned off earlier and the scan line in the next row is turned on later, thereby preventing the data lines from being transmitted in wrong rows.
Wherein a time interval between a first falling edge of the gate scan signal G 'and a first falling edge of the video data D' is an enable time TOEAnd the enabling signal controls the front edge of the grid scanning signal of the current row and controls the back edge of the grid scanning signal of the next row in the enabling time period. The charging time Tc of one line of the sub-pixels is the driving time T of one line of the video data in the traditional driving modeDSubtracting the enable time TOE。
In step S2, the timing controller inserts at least one of the second video data of the frame idle phase between two temporally adjacent first video data in the frame display phase to create a video data set in which the first video data and the second video data are combined.
Fig. 5 is a timing chart showing video data transmission of one frame displayed on the display panel of the present application. The timing controller inserts at least one of the second video data (X1, X2, X3... Xm, m being a positive integer) of the frame idle phase T2 'between two temporally adjacent first video data (1,2,3,4.... n, n being a positive integer) in the frame display phase T1'. In this embodiment, one line of the second video data (e.g., X1) is inserted between two temporally adjacent lines of the first video data (e.g., 1 and 2) in the frame display stage T1'; of course, in other embodiments, multiple lines of second video data may be inserted, such as two lines of second video data or three lines of second video data.
Wherein the periods of the second video data inserted between two temporally adjacent first video data in the frame display period T1' are the same (or the number of lines is the same).
The timing controller establishes a new driving configuration according to the video data, i.e., a video data group (H1, H2..... Hn, n is a positive integer) including a combination of the first video data and the second video data is established in the frame display phase T1', that is, video data for driving a row of sub-pixels includes a row of the first video data and at least one row of the second video data.
In step S3, the timing controller outputs the video data set to each of the sub-pixels, so that the duration of the frame display period of the display panel displaying one frame of picture is longer than the duration of the frame display period of the original frame of picture.
Wherein, since the second video data originally in the frame idle phase T2 is advanced into the frame display phase T1, the duration of the frame display phase T1' of the display panel displaying one frame of picture is made longer than the duration of the frame display phase T1 of the original one frame of picture.
Fig. 6 is a diagram showing a relationship between a timing sequence of a gate scan signal and video data and a charging time in a display panel according to the present application. The gate scan signals G 'include a first scan signal (e.g., a high level signal) during which the video data groups of the corresponding row in the frame display period T1' are written to the sub-pixels, and a second scan signal (e.g., a low level signal) during which the video data groups stop being written to the sub-pixels.
The first rising edge of the gate scan signal G 'is earlier than the first rising edge of the video data group, and the first falling edge of the gate scan signal G' is earlier than the first falling edge of the video data group.
And writing the first video data and the second video data corresponding to a row of the sub-pixels into the sub-pixels in sequence within the first scanning signal driving time.
The time interval between the first falling edge of the gate scanning signal G' and the first falling edge of the video data group is the enabling time TOEAnd the enabling signal controls the front edge of the grid scanning signal of the current row and controls the back edge of the grid scanning signal of the next row in the enabling time period. The charging time Tc' of one line of the sub-pixels is one line by adopting the driving mode of the applicationDrive time T of frequency data groupHSubtracting the enable time TOE。
Since the second video data is inserted after each line of the first video data, the enable time T is not changedOEIn this case, the sum of the charging durations Tc' of the sub-pixels in each row is greater than the sum of the original charging durations Tc corresponding to the sub-pixels in each row.
In summary, according to the driving method and the display device of the display panel, the second video data in the frame idle stage of displaying one frame of picture in the video data is inserted between two temporally adjacent first video data in the frame display stage to establish a video data group combining the first video data and the second video data, so as to establish a new driving configuration; the display panel is driven by the new driving configuration, so that the duration of a frame display stage of the display panel for displaying one frame of picture is longer than that of the frame display stage of the original frame of picture, the charging time of each row of sub-pixels is increased, and the phenomena of water ripple and color cast caused by insufficient charging time are improved.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (10)
1. A driving method of a display panel, the display panel comprising an array of distributed sub-pixels, the driving method comprising:
step S1, the timing controller of the display panel receives video data, buffers the video data, and establishes a driving configuration according to the video data, wherein the time for displaying a frame of picture in the video data by the display panel includes a frame display stage and a frame idle stage, and the video data includes first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage;
step S2, the timing controller inserts at least one of the second video data of the frame idle phase into the frame display phase between two temporally adjacent first video data to create a video data group combining the first video data and the second video data;
in step S3, the timing controller outputs the video data set to each of the sub-pixels, so that the duration of the frame display period of the display panel displaying one frame of picture is longer than the duration of the frame display period of the original frame of picture.
2. The driving method according to claim 1, wherein the periods of the second video data inserted between two temporally adjacent first video data in the frame display phase are the same.
3. The driving method according to claim 1, wherein in the step S3, the sum of the charging time periods of the sub-pixels in each row is greater than the sum of the original charging time periods of the sub-pixels in each row.
4. The driving method according to claim 3, wherein a scanning line and a data line are provided on the display panel, the sub-pixels are electrically connected to the scanning line and the data line, the scanning line supplies a gate scanning signal to the sub-pixels, the gate scanning signal includes a first scanning signal and a second scanning signal, and the driving method includes:
and writing the video data group into the sub-pixels in the first scanning signal driving time, and stopping writing the video data group into the sub-pixels in the second scanning signal driving time.
5. The driving method according to claim 4, wherein a first rising edge of the gate scan signal is earlier than a first rising edge of the video data group, and a first falling edge of the gate scan signal is earlier than a first falling edge of the video data group.
6. The driving method according to claim 5, wherein the first video data and the second video data corresponding to a row of the sub-pixels are written into the sub-pixels in a sequential order during the first scan signal driving time.
7. The driving method according to claim 5, further comprising:
the time sequence controller receives an enabling signal, the time interval between the first falling edge of the grid scanning signal and the first falling edge of the video data group is enabling time, the enabling signal controls the front edge of the grid scanning signal of the current row and controls the back edge of the grid scanning signal of the next row in the enabling time period, and the charging time of the sub-pixels is equal to the driving time of the video data group minus the enabling time.
8. The display device is characterized by comprising a display panel and a system chip, wherein the display panel comprises a time schedule controller, a grid driver, a source driver, a scanning line, a data line and a sub-pixel electrically connected with the scanning line and the data line;
the system chip is electrically connected with a time sequence controller of the display panel, the time sequence controller is respectively electrically connected with the grid driver and the source driver, the grid driver is electrically connected with the scanning line, and the source driver is electrically connected with the data line;
the time schedule controller is used for receiving and caching video data output by the system chip, wherein the time for displaying one frame of picture in the video data by the display panel comprises a frame display stage and a frame idle stage, and the video data comprises first video data corresponding to the frame display stage and second video data corresponding to the frame idle stage;
the time sequence controller is further used for inserting at least one piece of second video data of the frame idle stage into the frame display stage between two temporally adjacent pieces of first video data so as to establish a video data group formed by combining the first video data and the second video data;
the time sequence controller is further configured to output the video data sets of the sub-pixels of each row to the source driver, so that a duration of a frame display period of a frame of picture displayed by the display panel is longer than a duration of a frame display period of an original frame of picture.
9. The display device according to claim 8, wherein the period of the second video data between two adjacent first video data in the frame display phase is the same, and the sum of the charging durations of the sub-pixels in each row is greater than the sum of the original charging durations of the sub-pixels in each row.
10. The display device according to claim 9, wherein the scan line supplies a gate scan signal to the sub-pixel, a first rising edge of the gate scan signal is earlier than a first rising edge of the video data group, and a first falling edge of the gate scan signal is earlier than a first falling edge of the video data group;
the time sequence controller receives an enabling signal output by the system chip, the time interval between the first falling edge of the grid scanning signal and the first falling edge of the video data group is enabling time, the enabling signal controls the front edge of the grid scanning signal of the current row and simultaneously controls the back edge of the grid scanning signal of the next row in the enabling time period, and the charging time of the sub-pixels is equal to the driving time of the video data group minus the enabling time.
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| CN113362762A (en) * | 2021-06-30 | 2021-09-07 | 合肥京东方卓印科技有限公司 | Display panel, control method thereof and display device |
| WO2024011807A1 (en) * | 2022-07-15 | 2024-01-18 | 惠科股份有限公司 | Data driving circuit, display module, and method for outputting driving signal |
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| WO2024011807A1 (en) * | 2022-07-15 | 2024-01-18 | 惠科股份有限公司 | Data driving circuit, display module, and method for outputting driving signal |
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