CN113192467B - Scanning method of backlight panel, LED backlight panel, driving unit and display panel - Google Patents

Scanning method of backlight panel, LED backlight panel, driving unit and display panel Download PDF

Info

Publication number
CN113192467B
CN113192467B CN202110476928.7A CN202110476928A CN113192467B CN 113192467 B CN113192467 B CN 113192467B CN 202110476928 A CN202110476928 A CN 202110476928A CN 113192467 B CN113192467 B CN 113192467B
Authority
CN
China
Prior art keywords
led backlight
scanning
backlight panel
time
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110476928.7A
Other languages
Chinese (zh)
Other versions
CN113192467A (en
Inventor
黄浩
袁拓洲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Xinyuan Micro Technology Co ltd
Original Assignee
Guizhou Xinyuan Micro Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou Xinyuan Micro Technology Co ltd filed Critical Guizhou Xinyuan Micro Technology Co ltd
Priority to CN202110476928.7A priority Critical patent/CN113192467B/en
Publication of CN113192467A publication Critical patent/CN113192467A/en
Application granted granted Critical
Publication of CN113192467B publication Critical patent/CN113192467B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G09G3/3406—Control of illumination source

Abstract

The invention discloses a scanning method of a backlight panel, an LED backlight panel, a driving unit and a display panel, which relate to the technical field of liquid crystal display and comprise the following steps: and calculating a skip-scanning interval according to the information of the liquid crystal panel and the LED backlight panel, and then scanning and controlling the LED backlight panel after determining a scanning time sequence according to the skip-scanning interval. The invention adopts special scanning time sequence to control the jump scanning of the LED backlight panel, so that the slope difference between the time-space scanning signal line of the liquid crystal panel and each time-space scanning signal line after the frequency multiplication of the LED backlight panel is within 10 percent, and the problems of insufficient edge brightness of a moving image of the liquid crystal panel caused by asynchronous scanning and the like are avoided.

Description

Scanning method of backlight panel, LED backlight panel, driving unit and display panel
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a scanning method of a backlight panel, a spliced LED backlight panel, a driving unit of the backlight panel and a display panel.
Background
The LED backlight is used as a new backlight technology, can solve the problems of high power consumption, narrow color gamut, low contrast caused by liquid crystal light leakage and the like of the traditional liquid crystal panel, and has wide application prospect in the high-end liquid crystal display field.
The most important feature of the LED backlight technology is to combine the dynamic local dimming (local dimming) technology with the quantum dot technology. The traditional normally bright backlight source is divided into hundreds to tens of thousands of areas, and the areas can synchronously regulate and control the brightness and darkness according to the data of a display picture, so that the contrast of the image is greatly improved; meanwhile, the brightness of the backlight is dynamically adjusted, so that the energy is saved under high brightness. In addition, the LED backlight panel has the characteristics of small volume and high luminous efficiency, and is beneficial to realizing direct type ultrathin packaging. In brief, the display panel composed of the liquid crystal panel and the LED backlight panel outputs the color and gray scale information of an image, and the LED backlight panel outputs the gray scale partition of the image, thereby realizing high-contrast display.
However, since the LED backlight panel pixel size is much larger than the liquid crystal panel pixel size, the LED backlight panel has a lower resolution than the liquid crystal panel with the same panel size. In order to match the scanning speed of the liquid crystal panel image, the scanning frequency of the LED backlight panel image is usually higher, so that the problem of scanning asynchronism occurs. If the liquid crystal panel has moving images, the edge brightness of the liquid crystal image is insufficient due to the inconsistent opening time of the pixels of the LED backlight panel and the liquid crystal image.
As shown in fig. 1, taking 60Hz liquid crystal panel and 600Hz LED backlight panel as examples: scanning an image of the liquid crystal panel for one frame, and scanning an image of the LED backlight panel for 4 frames; the synchronicity problem is measured by the time-space scanning signal line slope:
the image scanning frequency of the liquid crystal panel is f LCD =60Hz, the image scanning frequency of the LED backlight panel is f LED 240hz, y = h (one frame corresponds to the length of the panel AA area in the h direction), x = t (time of one frame) =1/f, time-space scanning signal line slope k = y/x;
a liquid crystal panel: k is a radical of 0 ＝h/(1/f LCD )
LED backlight panel: k is a radical of formula 1 ＝h/(1/f LED )
It can be seen that k 1 ＝4×k 0 The time-space scanning signal lines have different slopes and are not synchronous in scanning, and the LED backlight panel image and the liquid crystal panel pixel display are overlapped to flicker and are asynchronous in position.
In addition, the screen size of the display industry is increasing day by day, and the size of the LED backlight panel is also required to be increased synchronously. Due to the size limitation of equipment in an LED component printing factory, the maximum component printing glass can be 20 inches at present, and the size limitation of the equipment in the LED component printing factory is also a technical point to be solved.
Disclosure of Invention
The embodiment of the invention provides an LED backlight scanning method, a driving unit and a display panel, which can solve the problems in the prior art.
The invention provides a scanning method of an LED backlight panel, which comprises the following steps:
setting the resolution line direction of the liquid crystal panel as v LCD The number of blank direction stripes of the liquid crystal panel is v blank (ii) a The resolution line direction of the LED backlight panel is v LED Calculating n = v LCD /v LED Namely, one LED lamp corresponds to n lines of liquid crystal panel image pixels;
scanning frequency of liquid crystal panel imageIs f LCD The scanning frequency of the image of the LED backlight panel is f LED ，F＝f LED /f LCD That is, the liquid crystal panel image scans one frame, and the LED backlight panel image scans F frames;
the number of blank is the time when the image of the liquid crystal panel is not updated, and is used for signal switching, discharging action, etc., v blank Need to satisfy (v) LCD +v blank ) Is an integer multiple of F;
calculating skip scan interval m = (v) LCD +v blank ) V (n x F); wherein, the m is an integer, if not, the m is rounded up or down;
the scanning synchronization with the liquid crystal panel image is realized by the method of scanning and skipping m rows of the LED backlight panel image, the scanning time of the pixel of the liquid crystal panel image of n rows is set as a small group of time, the small group of time is divided into F parts, and the scanning line number of the corresponding LED backlight panel image is L (x), L (m + x), L (2 x m + x), 8230, L ((F-1) m + x), wherein [ x + (F-1) m + x ]]≤v LED And x is any initial row and is required to be less than or equal to m.
The skip-scan rule is that the turn-on sequence of the gate in each sub frame of the image of the LED backlight panel is as follows: [ L (1) → L (1 + m) → L (1 + 2+ m) → 8230; \8230; > L (1 + (F-1) × m) → L (2 + m) → 8230 → L (2 + (F-1) × m) → L (3) → 8230; \ 8230; → L (2 + (F-1) × m) ]. → 8230; \\ 8230; ] → \8230;/(\8230); → L (v); "L;") LED )】。
Preferably, said v blank Satisfy v LCD +v blank Divided by n.
Preferably, the scanning order of the F rows is arbitrarily combined within a small set of time.
Preferably, in each sub frame, after the sequence of the F rows in the first sub frame is determined, the relative sequence of the F rows in the following sequential sub frame needs to be consistent with that of the first sub frame.
Preferably, the sequence of F parts in each small group of time in each time-space scanning signal line of the image of the LED backlight panel is consistent.
Preferably, the LED backlight panel and the liquid crystal panel may have different start times of each frame, and the different time may be t p 0E30 times, where t p Is the charging time of each row of liquid crystal pixels.
When the time of opening the gate of the image of the LED backlight panel is prolonged, but the time of the group in which the image of the LED backlight panel is positioned is unchanged, the situation that two lines of images of the LED backlight panel are simultaneously opened exists, and at the moment, the LED is divided into an upper part and a lower part; the scanning lines of the LED backlight panel corresponding to a small group of time are divided into upper portions L (x), L (x + m), L (x +2 m), \8230, 8230, L (x + (F/2-1) m), and lower portions L (x + F/2 m), \8230, 8230, L (x + (F-1) m), where [ x + (F/2-1) m]≤v Upper COF ，[x+(F-1)*m]≤v LED (ii) a The scanning order of the F rows can be combined randomly within a small group of time; x is any initial row, and x is less than or equal to m; when F is odd, F/2 is rounded up.
Preferably, in each sub frame, the relative order of the F rows in the two upper and lower parts of the subgroup time is not fixed; in the upper and lower parts, after the sequence of the F rows in the first group of time is determined, the relative sequence of the F rows in the following group of time is consistent with that of the first group of time.
Preferably, the upper and lower two parts of LED backlight panel images are respectively turned on according to the turn-on sequence, and the skip-scan rule is that the turn-on sequence of the gate in each sub frame is:
upper part [ L (1) → L (1 + m) → L (1 + 2+ m) → 8230; \8230 → L (1 + (F/2-1) → m) → [ L (2) → 2+ m) → 8230; \8230; > L (2 + (F/2-1) → m) → [ L (3) → 8230; ] 8230; > L (2 + (F/2-1) → 8230; "828230;/\8230;) Upper COF )】
Lower portion [ L (1 + (F/2) → m) → 8230; \ 8230; → L (1 + (F-1): m) → L (2 + (F/2) → m) → L (2 + (F/2) +1) → m) → 8230; \ 8230; > L (2 + (F-1) → m) → L (3 + F/2 m) → 8230;) → 8230; \\\8230; 8230; → 8230; → [ 828230 → L (v) → 8230;) LED )】；
Wherein the skip-scan interval m = (v) LCD +v blank ) And when F is odd, F/2 is rounded up.
The invention also provides a spliced LED backlight panel, which is scanned by adopting the scanning method of the backlight panel, and the LED backlight panel is spliced into a large panel by a small plates a and b, wherein a and b are positive integers. The gate scanning signal of the LED backlight panel has two driving modes of scan COF and GOA; the data signal is driven by a data COF (chip on film), and 2 driving modes are provided, wherein one mode is that the data COF of an upper board drives the whole LED backlight panel, the other mode is that the upper data COF drives the upper part of the LED backlight panel, and the lower data COF drives the lower part of the LED backlight panel.
Preferably, when the gate on time of the LED backlight panel image is prolonged but the group time is not changed, a driving method that the upper and lower data COFs drive the upper and lower LED backlight panels respectively is required, and the data signal routing lines need to be cut off and disconnected, where the upper data COF drives v Upper COF Performing LED backlight panel image; when F is even, the upper data COF drives v Upper COF ＝(v LCD +v blank ) 2n lines of LED backlight panel images; when F is odd, the above data COF drives v Upper COF = m (F + 1)/2 lines of LED backlight panel image;
when the gate on time of the image of the LED backlight panel is not prolonged, the data signal can freely select any one of the driving modes.
The invention also provides a driving unit of the backlight panel, which comprises a time sequence controller, a TFT glass control circuit, a PCB circuit board and a COF, wherein a scanning time sequence is stored in the time sequence controller, and when the scanning time sequence is executed by the time sequence controller, the scanning method of the backlight panel is realized, and the difference between the time-space scanning signal line slope of the liquid crystal panel and each time-space scanning signal line slope after the frequency multiplication of the LED backlight panel is within 10 percent.
The invention also provides a display panel, which comprises a liquid crystal panel and an LED backlight panel, wherein the LED backlight panel is connected with a driving unit, and the driving unit performs scanning control on the LED backlight panel after a scanning time sequence is calculated by adopting the scanning method of the backlight panel.
The scanning method of the backlight panel, the LED backlight panel, the driving unit and the display panel have the advantages that:
by adopting the skip-scanning type LED backlight scanning method provided by the invention, the synchronous scanning of the LCD panel and the LED backlight can be realized, and the problems of flicker and the like caused by inconsistent scanning slope are avoided; the method can realize that the image scanning frequency of the LED backlight panel is more than or equal to 2 times of the image scanning frequency of the liquid crystal panel and can achieve synchronous scanning; the slope difference between the time-space scanning signal line of the liquid crystal panel and each time-space scanning signal line of the LED backlight panel after the frequency multiplication is more than or equal to 2 is within 10 percent. The image scanning frequency of the LED backlight panel is more than or equal to 2 times of the image scanning frequency of the liquid crystal panel, and when the image pixel data of the liquid crystal panel is updated once, the image pixel data of the LED backlight panel needs to be updated more than or equal to 2 times.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a graph of the slope of the time-space scanning signal lines of a liquid crystal panel and an LED backlight panel in the prior art.
Fig. 2 is a schematic diagram of time-space scanning signal lines of an image of an LED backlight panel according to an embodiment 1 of the present invention.
FIG. 3 is a schematic diagram of a scanning curve of an image of a mini LED backlight panel in embodiment 1 of the present invention.
Fig. 4 is a structural diagram of the spliced mini LED backlight panel and the liquid crystal panel in embodiment 2 of the present invention.
FIG. 5 is a schematic diagram of a splicing manner and a data signal driving manner of a spliced mini LED backlight panel according to embodiment 2 of the present invention
Fig. 6 is a schematic view of a scanning curve of the spliced mini LED backlight panel according to embodiment 2 of the present invention for prolonging the image gate on time.
Fig. 7 is a schematic diagram of a difference between a slope of a time-space scanning signal line of the liquid crystal panel and a slope of each time-space scanning signal line after frequency doubling of the LED backlight panel in embodiment 3 of the present invention being 10%.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Example 1
The invention provides a scanning method of a backlight panel, as shown in fig. 2, comprising the following steps:
s1, setting the resolution line direction of the liquid crystal panel as v LCD The number of blank lines in the gate direction of the liquid crystal panel is v blank (ii) a The resolution row direction of the LED backlight panel is v LED Calculating n = v LCD /v LED Namely, one LED lamp corresponds to n lines of liquid crystal panel image pixels;
s2, the scanning frequency of the liquid crystal panel image is f LCD The scanning frequency of the image of the LED backlight panel is f LED ，F＝f LED /f LCD Scanning one frame by the liquid crystal panel image, and scanning F frame by the LED backlight panel image;
the number of blank is the time when the image of the liquid crystal panel is not updated, and is used for signal switching, discharging action, etc., v blank Need to satisfy (v) LCD +v blank ) Is an integer multiple of F;
s3, calculating a skip scanning interval m = (v) LCD +v blank ) V (n × F); wherein, the m is an integer, if not, the m is rounded up or down;
s4, scanning synchronization with the liquid crystal panel image is achieved through a method of scanning the LED backlight panel image in a skipping mode for m lines, scanning time of pixels of the liquid crystal panel image in n lines is set to be a small group of time, the small group of time is divided into F parts, and scanning lines of the corresponding LED backlight panel image are L (x), L (m + x), L (2 x m + x), 8230, L ((F-1) m + x), wherein [ x + (F-1) m + x)]≤v LED (ii) a X is any initial row, and x is less than or equal to m;
the skip-scan rule is that the opening sequence of the gate in each sub frame is as follows: [ L (1) → L (1 + m) → L (1 + 2+ m) → 8230; \8230; > L (1 + (F-1) × m) → L (2) → M +……→L(2+(F-1)*m)】→【L(3)→……】→……→【……→L(v LED )】。
Further, in the present embodiment, v is blank Satisfy v LCD +v blank Divided by F.
Further, in the present embodiment, v is blank Satisfy v LCD +v blank Divided by n.
Further, in the present embodiment, the scanning order of F rows is arbitrarily combined within a small group of time.
Further, in this embodiment, in each sub frame, after the sequence of the F rows in the first sub-group time is determined, the relative sequence of the F rows in the following sequential sub-group time is consistent with the first sub-group time.
Further, in this embodiment, the order of F parts in each small group of time in each time-space scanning signal line of the image of the LED backlight panel is the same.
The mode of scanning in sequence without physical proximity is called skip scanning, and by adopting the skip scanning mode provided by the invention, the difference between the slope of the time-space scanning signal line of the liquid crystal panel and the slope of each time-space scanning signal line subjected to frequency multiplication of the LED backlight panel can be ensured to be within 10%.
The scanning method of the present invention is explained below by specific examples.
The Mini LED is a micro light source, and the Mini LED backlight panel is an LED backlight panel that emits light from micro LEDs. The basic information of the liquid crystal panel and the mini LED backlight panel is as follows: v. of LCD ＝2160，f LCD ＝60Hz，v blank ＝240，v LED ＝108，f LED ＝600Hz。
Calculated according to the above procedure, n =2160/108=20, f =10, m = (2160 + 240)/(10 × 20) =12.
Setting image pixel scanning time of 20 lines of liquid crystal panel as a small group of time, which is divided into 10 parts, wherein the scanning line number of mini LED backlight panel image corresponding to a small group of time is L (x), L (12 + x), L (24 + x), \8230 \ 8230, and L (x + 96), wherein x is any starting line, and x is less than or equal to 12; the scan order of these 10 rows can be combined arbitrarily over a small set of times. In each sub frame of the mini LED backlight panel image, after the F rows in the first sub-group time are determined, the relative sequence of the 10 rows in the following sequential sub-group time needs to be consistent with the first sub-group time.
As shown in fig. 3, the gate turn-on sequence of the mini LED backlight panel image is:
【L1→L13→L25→……→L97】→【L2→L14→……→L98】→【L3→…】→…→【…→L108】
after the scanning time sequence is adopted, the slope of the time-space scanning signal line of the liquid crystal panel is k 0 ＝h/(1/f LCD ) The slope of a time-space scanning signal line of the mini LED backlight panel is k =60 multiplied by h 2 ＝h/(1/f LED (F) =60 × h, see k 0 ＝k 2 The liquid crystal panel image and the mini LED backlight panel image are scanned synchronously.
Example 2
The Mini LED backlight panel is an LED backlight panel that is illuminated by micro-sized LEDs. The embodiment provides a spliced mini LED backlight panel, as shown in fig. 4, scanning is performed by using the scanning method of the backlight panel, the mini LED backlight panel is formed by splicing a small plates and b small plates into a large plate, where a and b are positive integers; the gate scanning signal of the mini LED backlight panel has two driving modes of scan COF and GOA; the data signals have 2 driving modes, one mode is that the upper dataCOF drives the whole mini LED backlight panel, the other mode is that the upper dataCOF drives the upper mini LED backlight panel, and the lower dataCOF drives the lower mini LED backlight panel.
As shown in fig. 5, when b =2, the LED backlight panel has three splicing methods, (1) when the dataCOF of the upper board drives the whole LED backlight panel, the two boards are identical in size, and the signal is connected by the adapter board in the middle. When the upper dataCOF drives the upper LED backlight panel and the lower data COF drives the lower LED backlight panel, (2) the sizes of the upper and lower boards can be different, the upper data COF drives the upper board and the lower dataCOF drives the lower board; (3) or the sizes of the two boards are consistent, the line numbers of the LED backlight panels driven by the upper data COF and the lower data COF are inconsistent, and the upper LED backlight panel and the lower LED backlight panel are divided according to the line numbers driven by the data signals. When b =3, the LED backlight panel has two splicing modes, (1) the middle of the upper two boards is connected with a signal by a patch board, a data COF of the first board inputs a data signal, and the data COF of the lower board inputs a data signal of the third board; (2) the 3 boards are connected with signals by the adapter board, and data signals are input by the data COF of the first board. When b is other integers, any combination of the five modes can be matched.
Further, in this embodiment, when the gate on time of the mini LED backlight panel image is extended but the group time is not changed, there is a case that two rows of mini LED backlight panel images are simultaneously turned on, and at this time, a driving method that an upper data COF and a lower data COF respectively drive an upper mini LED backlight panel and a lower mini LED backlight panel is adopted, and data signal routing lines need to be cut off and disconnected, wherein the upper data COF drives v Upper COF Performing mini LED backlight panel image; when F is even, the upper data COF drives v Upper COF ＝(v LCD +v blank ) 2n rows of mini LED backlight panel images; when F is odd, the above data COF drives v Upper COF = m (F + 1)/2 lines mini LED backlight panel image.
Furthermore, in this embodiment, when the gate on time of the image of the mini LED backlight panel is not prolonged, any driving method can be freely selected by the data signal.
The scanning method of the present invention is explained below by specific examples.
The basic information of the liquid crystal panel and the mini LED backlight panel is as follows: v. of LCD ＝2160，f LCD ＝60Hz，v blank ＝240，v LED ＝108，f LED ＝600Hz。
Calculated according to the above procedure, n =2160/108=20, f =10, m = (2160 + 240)/(10 × 20) =12.
The gate turn-on time of the mini LED backlight panel image can be prolonged, but the group time is not changed, so that the situation that two rows of mini LED backlight panel images are turned on simultaneously exists, and at the moment, an upper data COF and a lower data COF are needed to be respectively used for drivingAnd moving the driving modes of the upper part mini LED backlight panel and the lower part mini LED backlight panel. Wherein the upper COF drives v Upper COF = (2160 + 240)/(2 x 20) =60 line mini LED backlight panel images. The scanning time of 20 rows of liquid crystal panel image pixels is set as a small group of time, which is divided into 10 portions, and the image scanning line number of the mini LED backlight panel corresponding to the small group of time is divided into the upper portion L (x), L (12 + x), \8230 \ 8230 \ L (48 + x), and the lower portion L (x + 60), L (x + 72), \8230 \ 8230:, L (x + 96), wherein x is an arbitrary starting line, and x is less than or equal to 12. The scanning order of these 10 lines can be combined arbitrarily within a small set of times.
As shown in fig. 6, the turn-on sequence of the gates in each sub frame of the mini LED backlight panel image is:
an upper part: [ L1 → L13 → L25 → 8230; \ 8230; → L49 → [ L2 → L14 → 8230; \8230; → L50 → [ L3 → [ 8230 ]; ] → [ 8230 ]; \8230; ] [ 8230; ] [ 82308230; ]; → L60 ]
The lower part: [ L61 → L73 → 8230; \ 8230; → L97 → [ L62 → L74 → [ 8230; \8230; → L98 [ → [ L63 → [ 8230; ] [ → [ 8230 ]; ] [ 828230; [ (-) 8230; → L108; ])
After the scanning time sequence is adopted, the slope of the time-space scanning signal line of the liquid crystal panel is k 0 ＝h/(1/f LCD ) The slope of the time-space scanning signal line of the mini LED backlight panel image is k =60 × h 2 ＝h/(1/f LED (F) =60 × h, see k 0 ＝k 2 The liquid crystal panel image and the mini LED backlight panel image are scanned synchronously.
Example 3
The invention also provides a driving unit of the backlight panel, which comprises a time sequence controller, a TFT glass control circuit, a PCB circuit board and a COF, wherein a scanning time sequence is stored in the time sequence controller, and the scanning time sequence is executed by the time sequence controller to realize the scanning method of the backlight panel, so that the slope difference between the time-space scanning signal line slope of the liquid crystal panel and each time-space scanning signal line slope after the frequency multiplication of the LED backlight panel is within 10 percent (as shown in figure 7), and the problem of insufficient brightness of the edge of a moving image caused by asynchronous image scanning of the liquid crystal panel and the LED backlight panel is avoided.
Example 4
The invention also provides a display panel, which comprises a liquid crystal panel and an LED backlight panel, wherein the LED backlight panel is connected with a driving unit, and the driving unit performs scanning control on the LED backlight panel after a scanning time sequence is calculated by adopting the scanning method of the backlight panel.
The invention provides a scanning method of an LED backlight panel and the backlight panel, but the method is not limited to the LED backlight panel, and the backlight panels such as an OLED backlight panel, a mini LED backlight panel, a micro LED backlight panel and the like which comprise a driving circuit and a scanning time sequence are also applicable.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (13)

1. A scanning method of backlight panel is characterized in that the resolution line direction of liquid crystal panel is set as v LCD The number of blank direction stripes of the liquid crystal panel is v blank (ii) a The resolution line direction of the LED backlight panel is v LED Calculating n = v LCD /v LED That is, one LED lamp corresponds to n rows of liquid crystal panel image pixels;
the scanning frequency of the liquid crystal panel image is f LCD The scanning frequency of the image of the LED backlight panel is f LED ，F＝f LED /f LCD Scanning one frame by the liquid crystal panel image, and scanning F frame by the LED backlight panel image; wherein v is blank Need to satisfy (v) LCD +v blank ) Is divided by F;
when the image scanning frequency of the LED backlight panel is more than or equal to 2 times of the image scanning frequency of the liquid crystal panel, the slope difference between the time-space scanning signal line of the liquid crystal panel and each time-space scanning signal line after the frequency multiplication of the LED backlight panel is within 10 percent; the image scanning frequency of the LED backlight panel is more than or equal to 2 times of the image scanning frequency of the liquid crystal panel, and when the image pixel data of the liquid crystal panel is updated once, the image pixel data of the LED backlight panel needs to be updated more than or equal to 2 times.
2. The method of claim 1, wherein v is the scan of the backlight panel blank Satisfy v LCD +v blank Divided by n.
3. The method of claim 1, wherein the scanning synchronization with the LCD panel image is achieved by skipping scanning m lines of the LED backlight panel image, the scanning time of the pixel of the N lines of LCD panel image is set to a small group of time, the small group of time is divided into F, the scanning lines of the corresponding LED backlight panel image are L (x), L (m + x), L (2 + m + x), \8230, 8230, and L ((F-1) + m + x), wherein [ x + (F-1) + m]≤v LED The scanning order of the F rows can be combined arbitrarily in a small group of time; x is any initial row and is required to be less than or equal to m; m satisfies m = (v) LCD +v blank ) And (n) F), wherein m is an integer, and if not, the integer is rounded up or down.
4. The method as claimed in claim 3, wherein in each sub-frame, after the sequence of F rows in the first sub-group time is determined, the relative sequence of F rows in the following sub-group time is consistent with the first sub-group time.
5. The method of claim 4, wherein the gate turn-on sequence in each sub frame is: [ L (1) → L (1 + m) → L (1 + 2+ m) → 8230; \8230; > L (1 + (F-1) × m) → L (2 + m) → 8230 → L (2 + (F-1) × m) → L (3) → 8230; \ 8230; → L (2 + (F-1) × m) ]. → 8230; \\ 8230; ] → \8230;/(\8230); → L (v); "L;") LED ) Wherein the skip-scan interval m = (v) LCD +v blank )/(n*F)。
6. The method of claim 1, wherein the sequence of F times in each sub-group of time in each time-space scanning signal line of the LED backlight panel image is identical.
7. The method as claimed in claim 3, wherein when the gate on time of the LED backlight panel image is extended but the group time is not changed, there is a case that two rows of LED backlight panel images are simultaneously turned on, and the LEDs are divided into an upper portion and a lower portion; a small group of time corresponds to the scanning line number of the image of the LED backlight panel, which is divided into the upper part L (x), L (x + m), L (x +2 m), 8230, L (x + (F/2-1) m, and the lower part L (x + F/2 m), 8230, L (x + (F-1) m), wherein [ x + (F/2-1) m]≤v Upper COF ，[x+(F-1)*m]≤v LED (ii) a The scanning order of the F rows can be combined randomly within a small group of time; x is any initial row, and x is less than or equal to m; when F is odd, F/2 needs to be rounded up.
8. The method of claim 7, wherein the relative order of the F rows in the subgroup time of the upper and lower parts is not fixed in each sub frame; in the upper and lower parts, after the sequence of the F rows in the first group of time is determined, the relative sequence of the F rows in the following group of time is consistent with that of the first group of time.
9. The method as claimed in claim 7, wherein the upper and lower LED backlight panel images are turned on according to an on sequence, and the skip-scan rule is that the on sequence of the gates in each sub frame is:
an upper part: l (1) → L (1 + m) → L (1 +2 m) → 8230; \ 8230; → L (1 + (F/2-1) → m) → L (2) → m) → 8230; \ 8230; _ L (2 + m) → L (3) → 8230; L (2 + (F/2-1) → m) → 8230; _ 8230; "L (3) → 8230; L (v) → m) → 8230;) Upper COF )】
The lower part: [ L (1 + F/2+ m) → 8230; \8230; > L (1 + (F-1) × m) → L (2 + F/2+ m) → L (2 + (F/2 + 1)*m)→……→L(2+(F-1)*m)】→【L(3+F/2*m)→…】→……→【…→L(v LED )】
Wherein the skip-scan interval m = (v) LCD +v blank ) V (n x F), and when F is odd, F/2 is rounded up.
10. A tiled LED backlight panel, characterized in that it is scanned using the scanning method of a backlight panel according to any of claims 1 to 9, said LED backlight panel being tiled into a large panel from a b small panels, where a and b are positive integers; the gate scanning signal of the LED backlight panel has two driving modes of scan COF and GOA; the data signal is driven by a data COF, and 2 driving modes are provided, wherein one mode is that the data COF on an upper board drives a whole-surface LED backlight panel, the other mode is that the upper data COF drives an upper part of the LED backlight panel, and the lower data COF drives a lower part of the LED backlight panel.
11. The tiled LED backlight panel of claim 10, wherein when the gate on time of the LED backlight panel image is extended but the group time is not changed, the driving method of driving the upper and lower LED backlight panels with the upper and lower data COFs respectively is adopted, and the data signal routing is required to be cut off and disconnected, wherein the upper data COF drives v Upper COF Performing LED backlight panel image; when F is even, the upper data COF drives v Upper COF ＝(v LCD +v blank ) 2n lines of LED backlight panel images; when F is odd, the above data COF drives v Upper COF = m (F + 1)/2 lines of LED backlight panel image;
when the gate on time of the image of the LED backlight panel is not prolonged, the data signal can freely select any one of the driving modes.
12. A driving unit of a backlight panel, comprising a time sequence controller, a TFT glass control circuit, a PCB circuit board and a COF, wherein a scanning time sequence is stored in the time sequence controller, and when the scanning time sequence is executed by the time sequence controller, the scanning method of any one of claims 1 to 9 is realized, and the difference between the time-space scanning signal line slope of a liquid crystal panel and each time-space scanning signal line slope after frequency multiplication of an LED backlight panel is realized to be within 10%.
13. A display panel, comprising a liquid crystal panel and an LED backlight panel, wherein the LED backlight panel is connected to a driving unit, and the driving unit performs scanning control on the LED backlight panel after calculating a scanning timing sequence by using any one of the methods of claims 1 to 9.
CN202110476928.7A 2021-04-29 2021-04-29 Scanning method of backlight panel, LED backlight panel, driving unit and display panel Active CN113192467B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110476928.7A CN113192467B (en) 2021-04-29 2021-04-29 Scanning method of backlight panel, LED backlight panel, driving unit and display panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110476928.7A CN113192467B (en) 2021-04-29 2021-04-29 Scanning method of backlight panel, LED backlight panel, driving unit and display panel

Publications (2)

Publication Number Publication Date
CN113192467A CN113192467A (en) 2021-07-30
CN113192467B true CN113192467B (en) 2022-10-21

Family

ID=76980866

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110476928.7A Active CN113192467B (en) 2021-04-29 2021-04-29 Scanning method of backlight panel, LED backlight panel, driving unit and display panel

Country Status (1)

Country Link
CN (1) CN113192467B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113296318A (en) * 2021-04-16 2021-08-24 贵州芯源微科技有限公司 Novel display framework and liquid crystal display panel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101826300A (en) * 2010-03-30 2010-09-08 汕头超声显示器（二厂）有限公司 Active display device and driving method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63267088A (en) * 1987-04-24 1988-11-04 Matsushita Electric Ind Co Ltd Method for driving color cathode ray tube
CN101604510B (en) * 2008-06-14 2012-07-04 陈国平 Driving method for driving color liquid crystal display device by field order
CN102142236B (en) * 2010-02-03 2013-01-09 胡志强 Liquid crystal display driver for high-resolution interlacing scanned video signals
CN201662977U (en) * 2010-03-30 2010-12-01 汕头超声显示器（二厂）有限公司 Active display device
CN102368377B (en) * 2011-09-16 2013-12-04 广东威创视讯科技股份有限公司 Lattice display screen pixel multiplication apparatus and lattice display screen system
CN102789769B (en) * 2012-07-05 2014-07-30 青岛海信电器股份有限公司 Three-dimensional (3D) liquid crystal display driving method and 3D liquid crystal display system
CN103971642B (en) * 2014-05-20 2016-09-14 深圳市绿源半导体技术有限公司 LED display driving method and LED power control circuit
CN105390091B (en) * 2015-11-04 2017-12-08 深圳市绿源半导体技术有限公司 LED shows enable signal control system, LED display system and display drive method
CN107424573B (en) * 2017-07-31 2019-09-10 明基智能科技（上海）有限公司 Show the method and display system of image

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101826300A (en) * 2010-03-30 2010-09-08 汕头超声显示器（二厂）有限公司 Active display device and driving method thereof

Also Published As

Publication number Publication date
CN113192467A (en) 2021-07-30

Similar Documents

Publication Publication Date Title
US8179364B2 (en) Display device and light source
KR101703875B1 (en) LCD and method of driving the same
US8471802B2 (en) Liquid crystal display
US20060097981A1 (en) Liquid crystal display and driving method thereof
US7973809B2 (en) Electro-optical device, driving circuit and driving method of the same, and electronic apparatus
CN112530351B (en) Display panel driving method, display panel and display device
US11302272B2 (en) Display device, and driving method for the display device for reducing power consumption and improving display effect
US11335249B1 (en) Light-emitting panel and brightness adjustment method, and display device
US20070229413A1 (en) Electro-optical device, method for driving electro-optical device, and electronic apparatus
US7453430B2 (en) Field sequential liquid crystal display and a driving method thereof
US20100090942A1 (en) Active matrix display device
US20050030272A1 (en) Electro-optical device and driving method thereof, projection-type display device, and electronic apparatus
US20090195561A1 (en) Electro-optical device, driving circuit and driving method of the same, and electronic apparatus
JP2010091967A (en) Electro-optical device
US7012598B2 (en) Liquid crystal display device and method for operating the same
CN113192467B (en) Scanning method of backlight panel, LED backlight panel, driving unit and display panel
CN102473386B (en) Image display device
CN101295480A (en) Alternation contra-rotation scanning type indication method and device
US9123299B2 (en) Liquid crystal display device including LED unit using current mirror circuit
JP2001184012A (en) Matrix type display device
JP2003316335A (en) Liquid crystal display device and method for driving the same
CN109147699A (en) A kind of double-layer showing device and its driving method
KR101820839B1 (en) LCD and method of driving the same
CN114399976B (en) Liquid crystal display device and backlight driving method thereof
KR101687804B1 (en) Apparatus and method for liquid crystal display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20230719

Address after: 710000, Room 1117, 11th Floor, Building A, Xianhe Guandu, Fengxi New City, Xixian New District, Xi'an City, Shaanxi Province

Patentee after: Xi'an Xinyuan Micro Technology Co.,Ltd.

Address before: 550000 room 9, 39 / F, unit 1, building E8 (No. 2 International Finance Street), Pengjiawan flower orchard project, huaguoyuan back street, Nanming District, Guiyang City, Guizhou Province [flower orchard community]

Patentee before: Guizhou Xinyuan Micro Technology Co.,Ltd.