CN116434715A

CN116434715A - Display device driving method and display device

Info

Publication number: CN116434715A
Application number: CN202310479889.5A
Authority: CN
Inventors: 曹尚操; 康报虹
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-07-14

Abstract

The application discloses a driving method of a display device and the display device, wherein the driving method comprises the following steps: detecting a picture of the next frame, and generating original driving signals of in-plane wires connected with fan-out wires in all fan-out areas; adjusting and compensating original driving signals of in-plane wires connected with at least two fan-out wires at the outermost side of the fan-out area to generate corresponding compensating driving signals; and driving the picture display of the next frame by using the corresponding compensation data signals and the original driving signals corresponding to other in-plane wires except the in-plane wires connected with the external fan-out wires. According to the method, the device and the system, the length of the fan-out wiring is different according to the connection of the flip film, the compensation adjustment is carried out on the driving signal of the in-plane wiring, and the problem that bright spots or dark spots (mura) occur due to the fact that the resistance is different due to the fact that the fan-out wiring length is different after the flip film passes through the fan-out wiring is avoided, and then the voltage waveform of the in-plane wiring is affected.

Description

Display device driving method and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a driving method of a display device and a display device.

Background

The liquid crystal display (Liquid Crystal Display, LCD) has many advantages of thin body, power saving, no radiation, etc., and has been widely used. Such as: liquid crystal televisions, mobile phones, personal Digital Assistants (PDAs), digital cameras, computer screens, notebook computer screens, and the like are dominant in the field of flat panel displays.

As LCD technology is more and more mature, cost reduction is a main way of improving competitiveness, so DRD (dual-rate driving) and TRD (triple-rate driving) products are currently studied in the market, that is, the number of data lines is reduced to 1/2 or 1/3, so that the cost of a data driving chip can be saved; each Chip On Film (COF) is connected to a data line or a scan line through a wiring of a fan-out area, but the fan-out wirings at two ends are long, so that in the data line or the scan line connected by the same COF, the charging rate of the pixels corresponding to the data line or the scan line at two ends is different from that of the pixels corresponding to the data line or the scan line in the middle, and thus bright spots and dark spots, namely the so-called COF mura problem, occur.

Disclosure of Invention

The application aims to provide a driving method of a display device and the display device, and aims to solve the COF mura problem of the display device.

The application discloses a display device's drive method, display device includes display panel, along data line or scanning line direction, display panel includes two at least fan-out district, and the in-plane wiring in the display panel is connected to every fan-out district one end, and a flip chip film is connected to one end, and the length of the fan-out wiring of every fan-out district is from the centre to both sides increase, drive method includes the step:

detecting a picture of the next frame, and generating original driving signals of in-plane wires connected with fan-out wires in all fan-out areas;

adjusting and compensating original driving signals of in-plane wires connected with at least two fan-out wires at the outermost side of the fan-out area to generate corresponding compensating driving signals;

and driving the picture display of the next frame by using the corresponding compensation data signals and the original driving signals corresponding to other in-plane wires except the in-plane wires connected with the external fan-out wires.

Optionally, the in-plane wiring includes a data line, the display panel is divided into two display areas along the scanning line direction, the number of the data lines in the two display areas is the same, the flip chip film is provided with two, and the fan-out wirings of the two fan-out areas are respectively connected with the two flip chip films and the data lines in the two display areas;

the step of detecting the picture of the next frame and generating the original driving signals of the in-plane wires connected by the fan-out wires in all fan-out areas comprises the following steps:

detecting a picture of the next frame, and generating original data signals of data lines connected by fan-out wires in all fan-out areas;

the step of adjusting and compensating the original driving signals of the in-plane wires connected by at least two fan-out wires at the outermost side and at least one fan-out wire at the middle side of the fan-out area to generate corresponding compensating driving signals comprises the following steps:

adjusting and compensating original data signals of at least two fan-out wires at the outermost side of the fan-out area and a data wire connected with at least one fan-out wire at the middle of the fan-out area so as to generate corresponding compensation data signals;

the step of driving the image display of the next frame by using the corresponding compensation driving signal and the original driving signal corresponding to the other in-plane wires except the in-plane wires connected with the outside fan out wires comprises the following steps:

and driving the picture display of the next frame by using the corresponding compensation data signals and the original data signals corresponding to other data lines except the data line connected with the outside fan-out wire and the at least one fan-out wire in the middle.

Optionally, the step of performing adjustment compensation on the original data signal of the data line connected by at least two fan-out wires at the outermost side and at least one fan-out wire at the middle side of the fan-out area to generate a corresponding compensated data signal includes:

judging whether the current picture is a preset picture, if so, compensating the data signals on the data lines connected with the fan-out area from two sides to the middle in sequence to generate corresponding compensation data signals; if the frame is not the preset frame, executing the step of adjusting and compensating the original data signals of the data lines connected with at least two fan-out wires at the outermost side and at least one fan-out wire at the middle of the fan-out area to generate corresponding compensated data signals;

the preset picture is a pure green picture with a gray level value of 64.

Optionally, each data line is provided with a sub-pixel with different colors, and the sub-pixels are respectively a red sub-pixel, a green sub-pixel and a blue sub-pixel, and whether the current picture is a preset picture or not is judged, if the current picture is the preset picture, the data signals on the data lines connected with the fan-out area are sequentially compensated from two sides to the middle so as to generate corresponding compensation data signals; if the frame is not the preset frame, the step of performing adjustment compensation on the original data signal of the data line connected by the at least two fan-out wires at the outermost side and the at least one fan-out wire at the middle of the fan-out area to generate a corresponding compensated data signal includes:

if the frame is preset, the gray scale voltage of the red sub-pixel and the blue sub-pixel on each data line is increased to generate corresponding compensation data signals.

Optionally, the display panel includes red, green and blue sub-pixels, and the driving method further includes the steps of:

the alignment angles of the red sub-pixel and the blue sub-pixel are controlled and regulated within a first preset range, and the alignment angles of the green sub-pixel are controlled and regulated within a second preset range;

wherein the first preset range is 0.85 ° to 0.95 °, and the second preset range is 1.15 ° to 1.25 °.

Optionally, the difference between the gray scale voltages corresponding to the compensation data signal and the original data signal is 1-3V, and the difference between the gray scale voltages corresponding to the compensation data signal and the original data signal corresponding to the fan-out wires with different lengths in the fan-out area is different.

Optionally, the step of driving the image display of the next frame by using the corresponding compensation data signal and the original driving signal corresponding to the other in-plane wires except the in-plane wires connected with the outside fan out wires further includes the steps of:

when the next frame picture is displayed as the current frame picture, detecting the brightness value corresponding to each row of pixels of the display area corresponding to the current frame picture, calculating the difference value of the brightness values of one row of pixels at the edge in the display area and one row of pixels at the middle in the display area, and readjusting the compensation value to generate a compensation driving signal of the next frame if the difference value is larger than a preset value, wherein if the difference value is smaller than the preset value, the compensation value is not required to be adjusted.

The application also discloses a display device driven by the driving method according to any one of the above, wherein the display device comprises a display panel and a driving circuit; the display panel comprises a non-display area and a display area, wherein a plurality of crisscrossed scanning lines and data lines are arranged in the display area, the display panel comprises at least two fan-out areas along the direction of the data lines or the scanning lines, the fan-out areas are arranged in the non-display area, the driving circuit comprises at least two flip films, one end of each fan-out area is connected with an in-plane wiring in the display panel, one end of each fan-out area is connected with one flip film, and the length of the fan-out wiring of each fan-out area is increased from the middle to two sides; the driving circuit comprises a source electrode driving module or a grid electrode driving module, the source electrode driving module or the grid electrode driving module is arranged on the flip chip film, the source electrode driving module or the grid electrode driving module comprises a plurality of voltage adjusting and compensating units, and each voltage adjusting and compensating unit is used for adjusting the voltage of the in-plane wiring of the display panel connected with each corresponding flip chip film.

Optionally, the display device further includes a brightness detection module, where the brightness detection module is connected to the source driving module or the gate driving module, and the brightness detection module obtains a corresponding voltage value according to the detected brightness, and outputs the voltage value to the voltage adjustment compensation unit to adjust the voltage output to the in-plane wiring;

wherein, the in-plane wiring comprises a data line and a scanning line.

Optionally, the display panel includes an array substrate, a color film substrate, and a liquid crystal layer between the array substrate and the color film substrate, where the color film substrate is provided with a color resistance layer, and the color resistance layer includes a red color resistance, a green color resistance, and a blue color resistance;

wherein the alignment angle of the liquid crystal in the region of the liquid crystal layer corresponding to the red color resistance and the blue color resistance is 0.85 DEG to 0.95 DEG, and the alignment angle of the liquid crystal in the region of the liquid crystal layer corresponding to the green color resistance is 1.15 DEG to 1.25 deg.

Compared with the scheme that the length or the area of the fan-out wires in the fan-out area is changed so that the resistance of the wires in the fan-out area is the same, the method and the device do not need to change the length or the area of the fan-out wires, and directly change the voltage waveform of the driving signals by adjusting the corresponding driving signals, namely, adjust and compensate the original driving signals of the in-plane wires connected with at least two fan-out wires at the outermost side of the fan-out area so as to generate the corresponding compensation driving signals; and driving the picture display of the next frame by using the corresponding compensation driving signal and the original driving signal corresponding to other in-plane wires except the in-plane wires connected with the external fan-out wires, thereby solving the COF mura problem.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:

FIG. 1 is a flow chart of a driving method according to a first embodiment of the present application;

fig. 2 is a schematic structural view of a display device according to a first embodiment of the present application;

fig. 3 is a schematic structural diagram of a display panel and a flip chip film connection according to a first embodiment of the present application;

FIG. 4 is a flow chart of a driving method according to a second embodiment of the present application;

fig. 5 is a schematic diagram of a driving signal waveform of a second embodiment of the present application;

FIG. 6 is a flow chart of a driving method according to a third embodiment of the present application;

fig. 7 is a flow chart of a driving method of a fourth embodiment of the present application;

fig. 8 is a schematic structural view of a display panel according to a fourth embodiment of the present application;

fig. 9 is a schematic structural view of a display device of a fifth embodiment of the present application;

fig. 10 is a schematic structural diagram of a display panel and a flip chip film connection according to a sixth embodiment of the present application.

100, a display device; 200. a display panel; 210. a fan-out area; 211. a fan-out wiring; 220. in-plane routing; 221. a data line; 222. a scanning line; 230. a display area; 240. a non-display area; 250. a color film substrate; 251. a color resist layer; 260. an array substrate; 270. a liquid crystal layer; 300. a driving circuit; 310. a flip chip film; 320. a source electrode driving module; 330. a gate driving module; 340. a voltage adjustment compensation unit; 350. a brightness detection module; r-red resistor/red subpixel; g-green block/green sub-pixel; b-blue block/blue sub-pixel.

Detailed Description

It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.

In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.

Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that, the limitation of each step involved in the present solution is not considered to limit the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, or executed after, or even executed simultaneously, so long as the implementation of the present solution is possible, all the steps should be considered as falling within the protection scope of the present application; the present application is described in detail below with reference to the attached drawings and alternative embodiments.

As shown in fig. 1, as a first embodiment of the present application, a driving method of a display device 100 is disclosed, the display device 100 includes a display panel 200, and along a direction of a data line 221 or a scan line 222, the display panel 200 includes at least two fan-out areas 210, one end of each fan-out area 210 is connected to an in-plane wiring 220 in the display panel 200, one end is connected to a flip chip film 310, and a length of a fan-out wiring 211 of each fan-out area 210 increases from the middle to the two sides, the driving method includes:

s1: detecting a picture of the next frame, and generating original driving signals of in-plane wires connected with fan-out wires in all fan-out areas;

s2: adjusting and compensating original driving signals of in-plane wires connected with at least two fan-out wires at the outermost side of the fan-out area to generate corresponding compensating driving signals;

s3: and driving the picture display of the next frame by using the corresponding compensation driving signals and the original driving signals corresponding to other in-plane wires except the in-plane wires connected with the external fan-out wires.

The present embodiment is mainly directed to DRD (dual-rate driving) and TRD (triple-rate driving) products in the display device 100, but is not limited to such products; referring to fig. 1 to 3, it is considered that, due to the longer fan-out trace 211 at both ends of the traces of the fan-out area 210 connected by each flip chip film 310 chip, the charging rate of the pixels corresponding to the data lines 221 or the scan lines 222 at both ends is different from the charging rate of the pixels corresponding to the data lines 221 or the scan lines 222 in the middle among the data lines 221 or the scan lines 222 connected by the same COF; before displaying a frame of picture, the embodiment adjusts and compensates the original driving signal of the in-plane wire 220 connected by at least two fan-out wires 211 at the outermost side of the fan-out area 210 to generate a corresponding compensated driving signal; the corresponding compensation driving signals and the original driving signals corresponding to the other in-plane wires 220 except the in-plane wires 220 connected with the external fan-out wire 211 are used for driving the picture display of the next frame, so that the problems of bright spots and dark spots, namely the so-called COF mura, caused by uneven charging of the fan-out wires 211 at two sides of the fan-out area 210 and the data wires 221 corresponding to the fan-out wires 211 in the middle are solved.

In general, at least two fan-out areas 210 are provided in the display device 100, that is, three fan-out areas 210 or four fan-out areas 210 may be provided; taking two fan-out areas 210 as an example, in this embodiment, the driving signals of the in-plane traces 220 connected by the fan-out traces 211 on two sides of the two fan-out areas 210 are changed, so that the charging voltage of the corresponding pixels is changed, and the resulting charging amount is an ideal charging amount, so that the brightness difference between the pixels on two sides and the brightness difference between the pixels on the middle line is changed, thereby avoiding the brightness difference between the pixels on two lines being large, leading to obvious bright and dark spots and affecting the display effect.

As shown in fig. 4, as a second embodiment of the present application, which is a further refinement and improvement of the first embodiment, the present embodiment is mainly directed to a change of the data voltage or the gray-scale voltage value, specifically, the in-plane trace 220 includes a data line 221, the display panel 200 is divided into two display areas 230 along the direction of the scan line 222, the number of the data lines 221 in the two display areas 230 is the same, two flip chip films 310 are provided, and the fan-out traces 211 of the two fan-out areas 210 are respectively connected to the two flip chip films 310 and the data lines 221 in the two display areas 230;

the step S1 includes:

s11: detecting a picture of the next frame, and generating original data signals of data lines connected by fan-out wires in all fan-out areas;

correspondingly, the step S2 includes:

s21: adjusting and compensating original data signals of at least two fan-out wires at the outermost side of the fan-out area and a data wire connected with at least one fan-out wire at the middle of the fan-out area so as to generate corresponding compensation data signals;

the step S3 includes:

s31: and driving the picture display of the next frame by using the corresponding compensation data signals and the original data signals corresponding to other data lines except the data line connected with the outside fan-out wire and the at least one fan-out wire in the middle.

Generally, the number of the data lines 221 is greater than that of the scan lines 222, and the voltages on the data lines 221 are greatly different in this application, so that the bright and dark spots or the bright and dark lines appearing on the display screen are greatly affected by the data lines 221, and the embodiment is mainly changed for the data lines 221, as shown in fig. 2 to 5, two outermost fan-out wires 211 in each fan-out area 210 are correspondingly connected with two outermost data lines 221 (D1 and D960) in the display area 230 respectively, one middle fan-out wire 211 in the fan-out area 210 is correspondingly connected with the middle data line 221 in the display area 230, and the fan-out wires 211 in the fan-out area 210 are correspondingly connected with the data lines 221 in the display area 230 from two sides to the middle; the lengths of the fan-out wires 211 at both sides in the fan-out area 210 are longest, and generally, compared with the other fan-out wires 211, the lengths of the fan-out wires 211 at the middle are shortest, so that when the adjustment is performed, the original data signals of the data wires 221 at both sides and the data wires 221 in the middle of the display area 230 corresponding to the fan-out wires 211 at both sides and the middle wire are preferentially adjusted to obtain corresponding compensation data signals, so that the charging voltages of the pixels on the data wires 221 at both sides and the charging voltages of the pixels on the data wires 221 in the middle are close to those of the pixels on the other data wires 221, and the mura problem is avoided.

Further, the step S21 includes the following steps:

s211: judging whether the current picture is a preset picture, if so, compensating the data signals on the data lines connected with the fan-out area from two sides to the middle in sequence to generate corresponding compensation data signals; if the frame is not the preset frame, executing the step of adjusting and compensating the original data signals of the data lines connected with at least two fan-out wires at the outermost side and at least one fan-out wire at the middle of the fan-out area to generate corresponding compensated data signals;

the preset frame is a pure green frame with a gray level of 64, and the COF mura is most obvious under the L64 gray level of the G frame, so that the differential pressure of the L64 of the G frame is mainly solved, the differential pressure is the voltage from R and B L gray levels to GL64, so that the L0 voltage of R and B can be increased to L0', the differential pressure with the L64 gray level voltage is reduced, the initial differential pressure DeltaV 1 is changed into DeltaV 2, and the differential pressure is reduced, so that the final charging rate is the same, and the brightness is the same, and the COF mura problem is solved.

It should be noted that, when the compensation of the data signal is considered, the compensation values of different display frames are different, or some frames are different due to the gray scale, the mura phenomenon is not easily perceived by human eyes, and for some frames, the compensation can be performed without adjusting the data compensation signal, or only the partial data lines 221 at the two sides or the middle position can be adjusted; however, if the next frame of picture is a special picture such as pure green, the mura phenomenon is very obvious because the human eyes are relatively sensitive, so before the compensation data signal is adjusted, the picture of the next frame is detected and judged, and then different adjustments are realized according to the detected specific picture.

Further, each data line 221 is provided with a sub-pixel with a different color, and a red sub-pixel, a green sub-pixel and a blue sub-pixel are respectively arranged, and whether the current picture is a preset picture is determined, if the current picture is a preset picture, the data signals on the data lines 221 connected with the fan-out area 210 are sequentially compensated from two sides to the middle to generate corresponding compensation data signals; if the frame is not the preset frame, the step of performing adjustment compensation on the original data signal of the data line 221 connected to the at least two fan-out wires 211 at the outermost side and the at least one fan-out wire 211 at the middle of the fan-out area 210 to generate a corresponding compensated data signal includes:

In addition, for the adjustment of the data signal of a special frame, such as a pure green frame, the contrast loss caused by the change of the corresponding gray scale voltage is considered, so the difference between the gray scale voltages corresponding to the compensation data signal and the original data signal is 1-3V, and the difference between the compensation data signal corresponding to the fan-out wires 211 with different lengths in the fan-out area 210 and the corresponding gray scale voltage of the original data signal is different.

As shown in fig. 6, as a third embodiment of the present application, based on a further improvement of any one of the above embodiments, the step S3 further includes the steps of:

s4: when the next frame picture is displayed as the current frame picture, detecting the brightness value corresponding to each row of pixels of the display area corresponding to the current frame picture, calculating the difference value of the brightness values of one row of pixels at the edge in the display area and one row of pixels at the middle in the display area, and readjusting the compensation value to generate a compensation driving signal of the next frame if the difference value is larger than a preset value, wherein if the difference value is smaller than the preset value, the compensation value is not required to be adjusted.

In this embodiment, considering that after compensation adjustment, the mura problem may be improved or solved in a period of time, but after a certain period of time, the problem of aging of a circuit or a corresponding thin film transistor still exists, such as deformation of waveforms of driving signals of partial traces under the same gray scale of a pure color picture, so that when the next frame picture is displayed as the current frame picture, the brightness value corresponding to each column of pixels of the display area 230 corresponding to the current frame picture is detected, the difference between the brightness value of one column of pixels at the edge in the display area 230 and the brightness value of one column of pixels in the middle in the display area 230 is calculated, if the difference is greater than the preset value, the compensation value is readjusted to generate a compensation driving signal of the next frame, and if the difference is less than the preset value, the compensation value is not required to be adjusted, and the step can be understood as a verification step after adjustment.

As shown in fig. 7, as a fourth embodiment of the present application, based on a further improvement of any of the above embodiments, the display panel 200 includes red, green, and blue sub-pixels, and the driving method further includes the steps of:

s0: the alignment angles of the red sub-pixel and the blue sub-pixel are controlled and regulated within a first preset range, and the alignment angles of the green sub-pixel are controlled and regulated within a second preset range;

wherein the first preset range is 0.85 ° to 0.95 °, and the second preset range is 1.15 ° to 1.25 °, and generally, in actual control, the optimal value of the alignment angle selection of the red sub-pixel and the blue sub-pixel is 0.9 °, and the optimal value of the alignment angle selection of the green sub-pixel is 1.2 °.

Referring to fig. 3, 5 and 8, in this embodiment, the problem of contrast degradation is caused when the gray scale voltage is changed, in particular, the dark state is caused to light up when the L0 voltage on the data lines 221 on both sides becomes larger, and the alignment angle of the G pixel is still maintained at 1.2 ° in order to have a smaller L64 voltage; the following table one shows that the COF mura phenomenon is not generated in the actual product verification in the following way; the implementation mode of the different alignment angles of RB and G from 1.2 degrees to 0.9 degrees can change the alignment voltage of RB from 15V to 13V at present when the alignment is performed, and the liquid crystal molecules corresponding to the RGB pixels have different pretilt angles in the alignment mode, so that the RGB pixels have different L0 gray scale voltages, the COF mura can be improved, and the contrast is not reduced, and the following table is specifically as follows:

list one

As shown in fig. 9, as a fifth embodiment of the present application, a display device 100 is disclosed, which is driven using the driving method described in any of the above embodiments, the display device 100 including a display panel 200 and a driving circuit 300;

the display panel 200 includes a non-display area 240 and a display area 230, wherein a plurality of criss-cross scan lines 222 and data lines 221 are disposed in the display area 230, and the display panel 200 includes at least two fan-out areas 210 along the data lines 221 or the scan lines 222, the fan-out areas 210 are disposed in the non-display area 240, the driving circuit 300 includes at least two flip films 310, one end of each fan-out area 210 is connected to an in-plane trace 220 in the display panel 200, one end is connected to one flip film 310, and the length of the fan-out trace 211 of each fan-out area 210 increases from the middle to two sides; the driving circuit 300 includes a source driving module or a gate driving module, which is disposed on the flip-chip film 310, and includes a plurality of voltage adjustment compensation units 340, where each voltage adjustment compensation unit 340 is configured to adjust a voltage of the in-plane trace 220 of the display panel 200 connected to each corresponding flip-chip film 310.

When there are multiple flip chip films 310, the display screen will have periodic uneven display or mura problem with COF as a unit, the uneven display is mainly caused by different lengths of the fan-out lines 211 in the fan-out area 210 formed between the COF and the in-plane lines 220, and the in-plane lines 220 are exemplified as data lines 221, the fan-out lines 211 of the data lines 221D1 and D480 in the corresponding display area 230 of the flip chip film 310 are different in length at the fan-out area 210 (fanout), so that the resistances are different, and meanwhile, the waveforms of D1 and D480 are different, which causes the pixel charging rates of two columns of D1 and D480 to be different, so that mura occurs gradually at different positions inside the COF, and meanwhile, with COF as a unit, the situation is improved, so that the resistance difference of the fan-out lines 211 at the fanout is as small as possible, but is limited by the frame of the product, and is unfavorable for the narrow frame; in addition, the charging rate of the pixels is as high as possible, but the charging rate cannot be sufficiently high for high-resolution and a-si and large-size products; for the improvement, the present application adjusts and compensates the original driving signal of the in-plane trace 220 connected by the at least two fan-out traces 211 at the outermost side of the fan-out area 210 to generate a corresponding compensated driving signal; the corresponding compensation driving signal and the original driving signal corresponding to the other in-plane wires 220 except the in-plane wires 220 connected with the external fan-out wire 211 are used for driving the picture display of the next frame, so that the Data voltage difference is reduced, and particularly, the COF mura generally appears under the L64 gray level of the G picture, so that the voltage difference of the L64 of the G picture is mainly solved, the voltage difference is the voltage between R and B L0 gray level and G L, the L0 voltage of R and B can be increased to L0', and the voltage difference is reduced, thereby solving the current COF mura problem.

Further, as shown in fig. 10, as a fifth embodiment of the present application, the display device 100 further includes a brightness detection module 350, the brightness detection module 350 is connected to the source driving module or the gate driving module, and the brightness detection module 350 obtains a corresponding voltage value according to the detected brightness, so as to output the voltage to the voltage adjustment compensation unit 340 to adjust the voltage output to the in-plane trace 220; wherein the in-plane trace 220 includes a data line 221 and a scan line 222.

When the adjusted compensation driving signal is used for driving, the COF mura problem can be improved or even eliminated in an ideal state, but the problem of line aging possibly exists after long-time use is considered, so that mura phenomenon still occurs when the compensated driving signal drives and displays a display picture, and readjustment is needed; in this embodiment, the adjusted compensation driving signal can be verified, and the size of the compensation voltage and the adjustment object can be automatically changed as a standby means for the post-adjustment, that is, the outermost data line 221 may be adjusted before, but the outermost data line 221 is not mura after being adjusted, but a mura phenomenon occurs in a certain data line 221 in the middle of the outermost data line 221, and at this time, compensation adjustment can be performed for the data line 221.

Further, referring to fig. 5 and 8, the display panel 200 includes an array substrate 260, a color film substrate 250, and a liquid crystal layer 270 between the array substrate 260 and the color film substrate 250, the color film substrate 250 is provided with a color resist layer 251, and the color resist layer 251 includes red, green, and blue color resists; considering that the L0 voltages of R and B are increased, the dark state contrast ratio is lowered, and the contrast ratio is lowered, the alignment angle of the liquid crystal in the region of the liquid crystal layer 270 corresponding to the red resistance and the blue resistance is 0.85 ° to 0.95 °, and the alignment angle of the liquid crystal in the region of the liquid crystal layer 270 corresponding to the green resistance is 1.15 ° to 1.25 °.

Generally, when the liquid crystal layer 270 is prepared by forming a box on a substrate, the optimal value of the alignment angle selection of the liquid crystal in the area of the liquid crystal layer 270 corresponding to the red color resistance and the blue color resistance is 0.9 degrees, the optimal value of the alignment angle selection of the liquid crystal in the area of the liquid crystal layer 270 corresponding to the green color resistance is 1.2 degrees, the alignment voltage of RB can be changed from 15V to 13V at present when the alignment is performed, and the liquid crystal molecules corresponding to the RGB pixels have different pretilt angles in an alignment mode, so that the RGB pixels have different L0 gray scale voltages, the COF mura can be improved, and the contrast is not reduced.

The inventive concept of the present application may form a very large number of embodiments, but the application documents are limited in size and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.

The technical solution of the present application may be widely used In various driving methods, such as a TN (Twisted Nematic) driving method, an IPS (In-Plane Switching) driving method, a VA (Vertical Alignment) driving method, an MVA (Multi-Domain Vertical Alignment) driving method, and of course, may be other types of driving methods, such as an OLED (Organic Light-Emitting Diode) driving method, which may be applied to the above solutions.

The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.

Claims

1. The driving method of the display device, the said display device includes the display panel, characterized by that, along the direction of data line or scanning line, the said display panel includes at least two fan-out areas, each fan-out area one end connects the in-plane routing in the display panel, one end connects a flip-chip film, the length of the fan-out routing of each fan-out area increases from the middle to both sides, the said driving method includes the step:

and driving the picture display of the next frame by using the corresponding compensation driving signals and the original driving signals corresponding to other in-plane wires except the in-plane wires connected with the external fan-out wires.

2. The driving method of claim 1, wherein the in-plane wires comprise data wires, the display panel is divided into two display areas along the scanning line direction, the number of the data wires in the two display areas is the same, the number of the flip chip films is two, and the fan-out wires of the two fan-out areas are respectively connected with the two flip chip films and the data wires in the two display areas;

the step of adjusting and compensating the original driving signals of the in-plane wires connected by at least two fan-out wires at the outermost side of the fan-out area to generate corresponding compensating driving signals comprises the following steps:

3. The driving method of claim 2, wherein the step of performing adjustment compensation on the original data signal of the data line connected by the at least two fan-out wires at the outermost side and the at least one fan-out wire at the middle side of the fan-out area to generate the corresponding compensated data signal comprises:

the preset picture is a pure green picture with a gray level value of 64.

4. The driving method as claimed in claim 3, wherein each data line is provided with sub-pixels of different colors, respectively red sub-pixel, green sub-pixel and blue sub-pixel, and the method comprises determining whether the current picture is a preset picture, if so, compensating the data signals on the data lines connected with the fan-out area sequentially from two sides to the middle to generate corresponding compensated data signals; if the frame is not the preset frame, the step of performing adjustment compensation on the original data signal of the data line connected by the at least two fan-out wires at the outermost side and the at least one fan-out wire at the middle of the fan-out area to generate a corresponding compensated data signal includes:

5. The driving method of claim 1, wherein the display panel includes red, green, and blue sub-pixels, the driving method further comprising the steps of:

6. The driving method of claim 3, wherein a difference between the gray voltages corresponding to the compensation data signal and the original data signal is 1-3V, and the difference between the gray voltages corresponding to the compensation data signal and the original data signal corresponding to the fan-out traces with different lengths in the fan-out area is different.

7. The driving method as claimed in claim 1, wherein the step of driving the picture display of the next frame using the corresponding compensation data signal and the original driving signal corresponding to the other in-plane wires except the in-plane wire connected to the outside fan out wire further comprises the steps of:

8. A display device, characterized in that it is driven using the driving method according to any one of claims 1 to 7, the display device comprising a display panel and a driving circuit;

the display panel comprises a non-display area and a display area, wherein a plurality of crisscrossed scanning lines and data lines are arranged in the display area, the display panel comprises at least two fan-out areas along the direction of the data lines or the scanning lines, the fan-out areas are arranged in the non-display area, the driving circuit comprises at least two flip films, one end of each fan-out area is connected with an in-plane wiring in the display panel, one end of each fan-out area is connected with one flip film, and the length of the fan-out wiring of each fan-out area is increased from the middle to two sides;

the driving circuit comprises a source electrode driving module or a grid electrode driving module, the source electrode driving module or the grid electrode driving module is arranged on the flip chip film, the source electrode driving module or the grid electrode driving module comprises a plurality of voltage adjusting and compensating units, and each voltage adjusting and compensating unit is used for adjusting the voltage of the in-plane wiring of the display panel connected with each corresponding flip chip film.

9. The display device according to claim 8, further comprising a brightness detection module connected to the source driving module or the gate driving module, the brightness detection module obtaining a corresponding voltage value according to the detected brightness to output to the voltage adjustment compensation unit to adjust the voltage output to the in-plane wiring;

wherein, the in-plane wiring comprises a data line and a scanning line.

10. The display device according to claim 8, wherein the display panel includes an array substrate, a color film substrate, and a liquid crystal layer between the array substrate and the color film substrate, the color film substrate being provided with a color resist layer including red, green, and blue color resists;