CN109658897B - Display driving method and display device - Google Patents
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- CN109658897B CN109658897B CN201910146033.XA CN201910146033A CN109658897B CN 109658897 B CN109658897 B CN 109658897B CN 201910146033 A CN201910146033 A CN 201910146033A CN 109658897 B CN109658897 B CN 109658897B
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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
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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Abstract
The application relates to a display driving method and a display device, wherein the display driving method is used for driving a display panel, the display panel comprises a plurality of rows of pixel units and scanning lines corresponding to the pixel units of each row, and the display driving method comprises the following steps: receiving a current frame image data signal; detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal; when the image data signals of at least two adjacent rows of pixel units are the same, the scanning lines corresponding to the adjacent pixel units in each row with the same image data signals are started at the same time. The display driving method and the display device can shorten the transmission time of each frame of image data signals of the display panel.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display driving method and a display device.
Background
Thin Film Transistor-Liquid Crystal displays (TFT-LCDs) have been developed rapidly by virtue of their advantages of low power consumption and ultra-Thin profile, and large-sized Liquid Crystal panels have become a competitive target for panel manufacturers. However, the large-sized liquid crystal panel generally has a problem in that a charging time of a pixel unit is insufficient due to a transmission time of an image data signal.
Disclosure of Invention
Accordingly, it is desirable to provide a display driving method and a display device for a large-sized liquid crystal panel with insufficient charging time of pixel units.
A display driving method for driving a display panel including a plurality of rows of pixel units and a scan line corresponding to each row of pixel units, the display driving method comprising:
receiving a current frame image data signal;
detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal;
when the image data signals of at least two adjacent rows of pixel units are the same, the scanning lines corresponding to the adjacent pixel units in each row with the same image data signals are started at the same time.
In one embodiment, when the image data signals of at least two adjacent rows of pixel units are the same, simultaneously turning on the scanning line corresponding to each adjacent row of pixel units with the same image data signal specifically includes:
when the image data signals of at least two adjacent rows of pixel units are the same, searching for a scanning line corresponding to each adjacent row of pixel units with the same image data signals;
generating a scan control signal;
and simultaneously starting the scanning lines corresponding to the adjacent pixel units in each row with the same image data signals according to the scanning control signals.
In one embodiment, when the image data signals of each row of pixel units of the display panel are the same, each row of scanning lines of the display panel is turned on simultaneously.
In one embodiment, the method further comprises the following steps: and when the image data signals of each row of pixel units of the display panel are different, sequentially starting each row of scanning lines of the display panel.
In one embodiment, each pixel unit comprises three sub-pixels, and the image data signal comprises a number of bits per sub-pixel per pixel unit per row of pixel units.
A display device comprising a display panel including a plurality of rows of pixel cells and scan lines corresponding to each row of pixel cells, the display device further comprising:
a time schedule controller for receiving the current frame image data signal;
the detection module is used for detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal; and
and the grid driver is used for simultaneously opening the scanning lines corresponding to the pixel units in each adjacent row with the same image data signals when the image data signals of at least two adjacent rows of pixel units are the same.
In one embodiment, the timing controller includes a search unit and a generation unit; the searching unit is used for searching the scanning line corresponding to each adjacent row of pixel units with the same image data signal when the image data signals of at least two adjacent rows of pixel units are the same; the generating unit is used for generating a scanning control signal; and the gate driver is used for controlling the scanning lines corresponding to the pixel units in each adjacent row with the same image data signal to be simultaneously started according to the scanning control signal.
In one embodiment, the gate driver is configured to simultaneously turn on each row of scan lines of the display panel when the image data signals of each row of pixel units of the display panel are the same.
In one embodiment, each pixel unit comprises three sub-pixels, and the image data signal comprises a number of bits per sub-pixel per pixel unit per row of pixel units.
A display device comprising a display panel including a plurality of rows of pixel cells and scan lines corresponding to each row of pixel cells, the display device further comprising:
a time schedule controller for receiving the current frame image data signal;
the detection module is used for detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal;
the time sequence controller comprises a searching unit and a generating unit; the searching unit is used for searching the scanning line corresponding to each adjacent row of pixel units with the same image data signal when the image data signals of at least two adjacent rows of pixel units are the same; the generating unit is used for generating a scanning control signal; and
and the grid driver is used for controlling the scanning lines corresponding to the pixel units in each adjacent row with the same image data signal to be simultaneously started according to the scanning control signal.
According to the display driving method and the display device, the detection module is arranged to detect whether the image data signals of at least two adjacent rows of pixel units exist in the current frame image data signals received by the timing controller, and when the image data signals of at least two adjacent rows of pixel units are the same, the grid driver simultaneously starts the scanning lines corresponding to the adjacent rows of pixel units with the same image data signals, so that the adjacent rows of pixel units with the same image data signals simultaneously receive the image data signals transmitted by the data lines, and the transmission time of each frame of image data signals of the display panel is shortened.
Drawings
FIG. 1 is a schematic diagram of a display device according to an embodiment;
FIG. 2 is a driving diagram of a display panel according to an embodiment;
FIG. 3 is a waveform diagram of scan control signals and switching signals according to an embodiment;
FIG. 4 is a flow diagram of a display driving method according to an embodiment;
FIG. 5 is a sub-flowchart of a display driving method according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device in an embodiment. The display device includes a system main board 10, a printed circuit board 20, a timing controller 30, a detection module 40, a display panel 50, a gate driver 60, and a source driver 70.
The printed Circuit board 20 is abbreviated as pcb (printed Circuit board). The printed circuit board 20 is a support for electronic components and is a carrier for electrical connection of electronic components. The printed circuit board 20 comprises a communication interface 21. In an embodiment, the communication interface 21 is an lvds (low Voltage Differential signaling) interface.
The system main board 10 is electrically connected to the printed circuit board 20. The system motherboard 10 is configured to transmit image data signals, control signals, and power to the printed circuit board 20 through the communication interface 21.
The timing controller 30 is disposed on the printed circuit board 20. The timing controller 30 is configured to receive the image data signal and the control signal, process the image data signal and the control signal into a signal with a preset format, and output the signal. The preset format is a format compatible with a communication protocol of an interface for receiving the signal.
The detecting module 40 is connected to the timing controller 30. The detecting module 40 is configured to detect whether the image data signals of at least two adjacent rows of pixel units 53 are the same according to the current frame image data signal.
The display panel 50 includes a plurality of scan lines 51, a plurality of data lines 52, and a plurality of rows of pixel units 53. The scan lines 51 are also referred to as gate lines, and the plurality of scan lines 51 extend in a first direction and are arranged in a second direction. The plurality of data lines 52 extend in the second direction and are arranged in the first direction. In other words, the extending and arranging directions of the scan lines 51 and the data lines 52 are opposite, that is, the extending direction of the data lines 52 is the arranging direction of the scan lines 51, and the arranging direction of the data lines 52 is the extending direction of the scan lines 51. Meanwhile, the first direction and the second direction are perpendicular to each other, the first direction may be understood as a vertical direction, that is, an extending direction of a Y axis in a two-dimensional coordinate, and the second direction may be understood as a horizontal direction, that is, an extending direction of an X axis in a two-dimensional coordinate.
The scanning line 51 corresponds to each row of pixel units 53, and specifically, each row of pixel units 53 corresponds to one scanning line 51. Each row of pixel units 53 includes a plurality of pixel units 53, the plurality of pixel units 53 are arranged in a matrix, and each pixel unit 53 is connected to one scan line 51 and one data line 52. Specifically, referring to fig. 2, each pixel unit 53 is connected to the scan line 51 and the data line 52 through a Thin Film Transistor (TFT) 54. Each pixel unit 53 is connected to the drain of the thin film transistor 54, the gate of the thin film transistor 54 is connected to the scanning line 51, and the source of the thin film transistor 54 is connected to the data line 52. Each pixel cell 53 includes three sub-pixels having three different colors of Red (Red), Green (Green), and Blue (Blue).
The gate driver 60 includes a plurality of gate driving channels to correspondingly connect the plurality of scan lines 51. The source driver 70 includes a plurality of source driving channels to correspondingly connect the plurality of data lines 52. The timing controller 30 is connected to the gate driver 60 and the source driver 70, respectively. The timing controller 30 is configured to transmit a scan control signal to the gate driver 60, and the gate driver 60 is configured to turn on the scan lines 51 according to the scan control signal to turn on the tfts connected to the scan lines 51. The timing controller 30 is further configured to transmit image data signals and control signals to the source driver 70, the source driver 70 transmits the image data signals to the pixel unit 53 through the turned-on thin film transistor 54, and the pixel unit 53 displays information according to the image data signals.
In one embodiment, the timing controller 30 is connected to the source driver 70 through a mini-LVDS interface. The signals transmitted from the timing controller 30 to the source driver 70 through the mini-LVDS interface include image data signals and control signals.
In general, the gate driver 60 is used for sequentially turning on the scan lines 51 according to the scan control signal, and the source driver 70 sequentially transmits the image data signal to the pixel units 53 of each row through the turned-on thin film transistors 54. Referring to fig. 2, when the scan line Gn is controlled by the scan control signal to be turned on, the tft 54 connected to the scan line Gn is turned on, and the pixel unit connected to the scan line Gn receives the image data signal transmitted by the data line Dn-1, the data line Dn, and the data line Dn + 1. The scanning line Gn-1 and the scanning line Gn +1 are respectively adjacent scanning lines to the scanning line Gn.
When the image data signals of several adjacent rows (at least two rows) of pixel units 53 exist in the current frame of the display panel 50 to be displayed, and if the gate driver 60 turns on the several rows of scanning lines 51 with the same image data signals of the pixel units 53 in sequence, the same image data signals need to be transmitted to the several adjacent rows of pixel units 53 several times, which is not favorable for reducing the charging time of the display panel 50, especially for the large-sized display panel 50, which has a limitation of the charging time.
In the current frame image data signals received by the timing controller 30, when the image data signals of at least two adjacent rows of pixel units 53 are the same, the timing controller 30 controls the gate driver 60 to simultaneously turn on the scanning lines 51 corresponding to each adjacent row of pixel units 53 with the same image data signal.
Specifically, the timing controller 30 includes a searching unit 31 and a generating unit 32. When the detecting module 40 detects that the image data signals of at least two adjacent rows of pixel units 53 are the same, the searching unit 31 is configured to search for the scanning line 51 corresponding to each adjacent row of pixel units 53 with the same image data signal. The generating unit 32 is used for generating a scanning control signal. The gate driver 60 is configured to control the scan lines 51 of the same image data signal in each adjacent row of pixel units 53 to be simultaneously turned on according to the scan control signal.
When the display panel 50 has the image data signals of the adjacent rows of pixel units 53 which are the same, the gate driver 60 turns on the scanning lines 51 corresponding to the rows of pixel units 53 at a time according to the scanning control signal, so that the rows of pixel units 53 receive the same image data signals at the same time, the scanning time of the gate driver 60 is shortened, and the time for transmitting the image data signals of one frame by the source driver 70 is shortened.
The gate driver 60 sequentially turns on the scanning lines 51 of the display panel 50, and when the first row of the adjacent rows of the pixel units 53 having the same image data signal is scanned, the gate driver 60 turns on the adjacent rows of the pixel units 53 at a time.
In an embodiment, when the detecting module 40 detects that the image data signals of each row of the pixel units 53 of the display panel 50 are different, the gate driver 60 sequentially turns on each row of the scan lines 51 of the display panel 50.
The timing controller 30 may set an image data signal transmitted to the data line 52 through the source driver 70 and a transmission time.
In one embodiment, when the detecting module 40 detects that the image data signals of each row of the pixel units 53 of the display panel 50 are the same, the gate driver 60 simultaneously turns on each row of the scan lines 51 of the display panel 50.
The image data signals of the adjacent rows of pixel units 53 are the same, that is, the image data signals of each pixel unit 53 corresponding to the adjacent rows of pixel units 53 are the same. The image data signal comprises the number of bits per sub-pixel of each pixel unit 53 per row of pixel units 53.
It should be noted that, if the image data signals are the same, the number of bits of each sub-pixel corresponding to each pixel unit 53 is the same, and the number of bits of each sub-pixel is the same, that is, the color depth of each sub-pixel is the same. The sub-pixels may be red or green or blue sub-pixels. The color depth of each sub-pixel may be 8bit or 6 bit.
Referring to fig. 3, in an embodiment, the scan control signal CKV is the same as the image data signals of two adjacent rows of pixel cells respectively connected to the scan line G1 and the scan line G2, and the scan control signal CKV controls the scan line G1 and the scan line G2 to be turned on simultaneously. The image data signals of two adjacent rows of pixel units connected to the scan line G3 and the scan line G4 are the same, and the scan control signal CKV controls the scan line G3 and the scan line G4 to be turned on simultaneously. The image data signals of two adjacent rows of pixel units connected to the scan line G5 and the scan line G6 are the same, and the scan control signal CKV controls the scan line G5 and the scan line G6 to be turned on simultaneously.
The display device also includes a gamma voltage chip 80 and a voltage generation module 90. The gamma voltage chip 80 is used for providing a reference voltage and generating a gamma voltage by using the reference voltage as a reference voltage under the control of the timing controller 30. The gamma voltage chip 80 is further configured to transmit the gamma voltage to the source driver 70, and the source driver 70 transmits the gamma voltage to the data line 52 to drive the display panel 50 to display the image.
The voltage generation module 90 is used for generating an analog voltage and a digital voltage. The voltage generating module 90 is used for supplying power to the timing controller 30, the gamma voltage chip 80, the gate driver 60 and the source driver 70 or controlling the turn-on of the scan lines 51 or the color display of the pixel units 53 as a control signal.
The detection module 40, the gamma voltage chip 80 and the voltage generation module 90 are disposed on the printed circuit board 20.
In summary, in the display device, by providing the detecting module 40, the detecting module 40 detects whether the image data signals of at least two adjacent rows of pixel units 53 in the current frame image data signal received by the timing controller 30 are the same, when the image data signals of at least two adjacent rows of pixel units 53 are the same, the gate driver 60 simultaneously turns on the scan lines 51 corresponding to the adjacent rows of pixel units 53 with the same image data signals, and then the adjacent rows of pixel units 53 with the same image data signals simultaneously receive the image data signals transmitted by the data lines 52, so as to shorten the transmission time of each frame of image data signals of the display panel 50.
Please refer to fig. 4, which is a flowchart illustrating a display driving method according to a preferred embodiment of the present application. It should be noted that the method of the present application is not limited to the order of the following steps, and in other embodiments, the method of the present application may include only a part of the following steps, or a part of the steps may be deleted. In addition, in other embodiments, one step may be divided into a plurality of steps, or a plurality of steps may be combined into one step.
In step S1, the current frame image data signal is received.
In step S2, it is detected whether the image data signals of at least two adjacent rows of pixel units 53 are the same according to the current frame image data signal.
In step S3, when the image data signals of at least two adjacent rows of pixel units 53 are the same, the scan lines 51 corresponding to each adjacent row of pixel units 53 with the same image data signal are turned on simultaneously.
In step S4, when the image data signals of the pixel units 53 in each row of the display panel 50 are different, the scanning lines 51 in each row of the display panel 50 are sequentially turned on.
Please refer to fig. 5, which is a sub-flowchart illustrating step S3 according to an embodiment.
Step S31, when the image data signals of at least two adjacent rows of pixel units 53 are the same, searching for the scanning line 51 corresponding to each adjacent row of pixel units 53 with the same image data signal;
step S32, generating a scanning control signal;
in step S33, the scan lines 51 corresponding to the adjacent pixel units 53 in each row having the same image data signal are turned on simultaneously according to the scan control signal.
In one embodiment, when the image data signals of each row of pixel units 53 of the display panel 50 are the same, each row of scan lines 51 of the display panel 50 is turned on at the same time.
It should be noted that, in the foregoing embodiment, the explanation of the display device is also applicable to the display driving method of the embodiment, and the implementation principle thereof is similar and will not be described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A display driving method for driving a display panel, the display panel including a plurality of rows of pixel units and a scan line corresponding to each row of pixel units, the display driving method comprising:
receiving a current frame image data signal;
detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal;
when the image data signals of at least two adjacent rows of pixel units are the same, searching for a scanning line corresponding to each adjacent row of pixel units with the same image data signals; generating a scan control signal; and simultaneously starting the scanning lines corresponding to the pixel units in each adjacent row which control the image data signals to be the same according to a rising edge of the scanning control signal.
2. The display driving method according to claim 1, wherein when the image data signals of the pixel units of each row of the display panel are the same, the scan lines of each row of the display panel are turned on simultaneously.
3. The display driving method according to claim 1, further comprising: and when the image data signals of each row of pixel units of the display panel are different, sequentially starting each row of scanning lines of the display panel.
4. The display driving method according to claim 1, wherein each pixel unit comprises three sub-pixels, and the image data signal comprises a number of bits per sub-pixel per pixel unit per row of pixel units.
5. A display device comprising a display panel including a plurality of rows of pixel units and scan lines corresponding to each row of pixel units, the display device further comprising:
a time schedule controller for receiving the current frame image data signal;
the detection module is used for detecting whether the image data signals of at least two adjacent lines of pixel units are the same or not according to the current frame image data signal;
the time sequence controller comprises a searching unit and a generating unit; the searching unit is used for searching the scanning line corresponding to each adjacent row of pixel units with the same image data signal when the image data signals of at least two adjacent rows of pixel units are the same; the generating unit is used for generating a scanning control signal; and
and the grid driver is used for controlling the scanning lines corresponding to the pixel units in each adjacent row with the same image data signal to be simultaneously started according to a rising edge of the scanning control signal.
6. The display device according to claim 5, wherein the gate driver is configured to simultaneously turn on each row of scanning lines of the display panel when the image data signals of each row of pixel units of the display panel are the same.
7. A display device as claimed in claim 5, wherein each pixel cell comprises three sub-pixels, and the image data signal comprises the number of bits per sub-pixel per pixel cell per row of pixel cells.
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| CN101903938A (en) * | 2007-12-27 | 2010-12-01 | 夏普株式会社 | Liquid crystal display, liquid crystal display driving method, and television receiver |
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