WO2019037554A1

WO2019037554A1 - Method for driving display panel, driving apparatus of display panel, and display apparatus

Info

Publication number: WO2019037554A1
Application number: PCT/CN2018/095066
Authority: WO
Inventors: 胡云川
Original assignee: 惠科股份有限公司; 重庆惠科金渝光电科技有限公司
Priority date: 2017-08-24
Filing date: 2018-07-10
Publication date: 2019-02-28
Also published as: CN107301853A

Abstract

Disclosed are a method for driving a display panel (10), a driving apparatus (20) of the display panel, and a display apparatus, wherein the method for driving the display panel (10) comprises: applying drive voltages with opposite polarities to the two pixel units (310) in the same pixel group (300) (S100); applying drive voltages with opposite polarities to the two adjacent pixel units (310) (S200); applying drive voltages with the same polarity to the sub-pixels (311) in the same pixel unit (310) (S300); and respectively applying drive voltages with different voltage levels to the sub-pixels (311) in the two adjacent pixel units (310) (S400); the driving apparatus (20) of the display panel comprises a control module and a signal generation module; and the display apparatus comprises the display panel (10) and the driving apparatus (20) of the display panel. By means of applying drive voltages with opposite polarities to the two adjacent pixel units (310), the polarization effect of the display panel (10) is weakened, and common voltage offset is reduced, so that the positive and negative amplitude values of the drive voltages are symmetrical relative to a common voltage, avoiding a flickering phenomenon and improving the display effect of the display panel (10).

Description

Title: Driving Method of Display Panel, Driving Device and Display Device of Display Panel

[0001] Embodiments of the present disclosure relate to the field of display technologies, and in particular, to a driving method of a display panel, a driving device for a display panel, and a display device.

Background technique

[0002] In a display panel, sub-pixels are driven by scanning lines and data lines, and variations in driving voltage control changes in sub-pixel gray scales to display images. However, when the driving voltages of the plurality of sub-pixels have the same polarity, the display panel is easily polarized, the common voltage is shifted, and the positive and negative amplitudes of the driving voltage are asymmetrical with respect to the common voltage, and a flicker phenomenon is generated to cause display. The display of the panel deteriorates. technical problem

The technical problem to be solved by the embodiment of the present application is to provide a driving method of the display panel, which can improve the display effect of the display panel.

A technical problem to be solved by the embodiments of the present application is to provide a driving device for a display panel, which can improve the display effect of the display panel.

A technical problem to be solved by the embodiments of the present application is to provide a display device having a better display effect.

Problem solution

Technical solution

[0006] In order to solve the above technical problem, the embodiment of the present application first provides a driving method of a display panel, where the display panel includes a plurality of pixel groups, and the pixel group includes two pixel units arranged adjacently in the first direction; The pixel unit includes sub-pixels arranged adjacently in the first direction;

[0007] The driving method of the display panel includes:

[0008] calculating a gray voltage according to gray information of the image signal;

[0009] calculating an offset voltage according to a spatial color mixing principle;

[0010] adding the gray voltage and the offset voltage to calculate the driving voltage;

[0011] applying opposite polarity driving voltages to two of the pixel units in the same pixel group; [0012] applying opposite polarity driving voltages to two adjacent pixel units;

[0013] applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit;

[0014] driving voltages of different voltage levels are respectively applied to the sub-pixels in two adjacent pixel units.

[0015] Optionally, the polarity of the driving voltage is periodically inverted.

[0016] Optionally, the sub-pixel includes:

[0017] a sub-pixel electrode;

a driving transistor, the driving transistor includes a source electrode, a drain electrode, and a gate electrode, the source electrode is electrically connected to the data line, the drain electrode is electrically connected to the sub-pixel electrode, and the gate electrode is The scan lines are electrically connected.

[0019] Optionally, the data line drives the pixel unit to charge and discharge with a positive polarity or a negative polarity periodic inversion.

[0020] Optionally, the power consumption P of the data line driving integrated circuit, the capacitance C on the data line, the voltage charging and discharging frequency f, and the voltage range V of charging and discharging satisfy a relationship of 1>=. ^ ² /2.

[0021] Optionally, the display panel further includes:

[0022] a common electrode;

[0023] a plurality of storage capacitors, the storage capacitors are disposed in one-to-one correspondence with the sub-pixels, the storage capacitors include a first electrode, a second electrode, and a capacitor dielectric layer, and the first electrode and the corresponding sub-pixel The sub-pixel electrode of the pixel is electrically connected, the second electrode is electrically connected to the common electrode, and the capacitor dielectric layer is disposed between the first electrode and the second electrode.

[0024] Optionally, one of the pixel units includes three of the sub-pixels, and the three sub-pixels are a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively.

[0025] Optionally, if the sub-pixel in the pixel unit is applied with a high voltage, the sub-pixel in the adjacent pixel unit is applied with a low voltage lower than the high voltage.

In order to solve the above technical problem, the embodiment of the present application further provides a driving device for a display panel, where the display panel includes a plurality of pixel groups, and the pixel group includes two pixel units arranged adjacently in the first direction; The pixel unit includes sub-pixels arranged adjacently in the first direction;

[0027] The driving device of the display panel comprises a control module, and the control module is configured to:

[0028] applying opposite polarity driving voltages to two of the pixel units in the same pixel group;

[0029] applying opposite polarity driving voltages to two adjacent pixel units; [0030] applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit;

[0031] driving voltages of different voltage levels are respectively applied to the sub-pixels in two adjacent pixel units.

[0032] Optionally, the sub-pixel includes:

[0033] sub-pixel electrode;

a driving transistor, the driving transistor includes a source electrode, a drain electrode, and a gate electrode, the source electrode is electrically connected to the data line, the drain electrode is electrically connected to the sub-pixel electrode, the gate electrode and the gate electrode The scan line is electrically connected.

[0035] Optionally, the data line drives the pixel unit to charge and discharge with a positive polarity or a negative polarity periodic inversion.

[0036] Optionally, the power consumption P of the data line driving integrated circuit, the capacitance C on the data line, the voltage charging/discharging frequency f, and the charging and discharging voltage range V satisfy the relationship 1>=. ^ ² /2.

[0037] Optionally, if the sub-pixel in the pixel unit is applied with a high voltage, the sub-pixel in the adjacent pixel unit is applied with a low voltage lower than the high voltage.

[0038] In order to solve the above technical problem, the embodiment of the present application further provides a display device, including:

[0039] a display panel, the display panel includes a plurality of pixel groups, scan lines, and data lines, the pixel group includes two pixel units arranged adjacently in a first direction; the pixel unit includes a first direction Sub-pixels arranged adjacent to each other; a plurality of the scan lines extending in a second direction and arranged in a first direction; a plurality of the data lines extending in a first direction and arranged in a second direction; and the plurality of the sub-arrays arranged in a same row The pixels are connected to the same scan line, and the sub-pixels of the adjacent pixel units are respectively connected to the adjacent data lines;

[0040] The driving device of the display panel, the driving device of the display panel comprises a control module, and the control module is configured to:

[0041] applying a driving voltage of opposite polarity to two of the pixel units in the same pixel group;

[0042] applying opposite polarity driving voltages to two adjacent pixel units;

[0043] applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit;

[0044] driving voltages of different voltage levels are respectively applied to the sub-pixels in two adjacent pixel units.

[0045] Optionally, the sub-pixel includes:

a sub-pixel electrode;

a driving transistor, wherein the driving transistor includes a source electrode, a drain electrode, and a gate electrode, and the source electrode The data lines are electrically connected, the drain electrodes are electrically connected to the sub-pixel electrodes, and the gate electrodes are electrically connected to the scan lines.

[0048] Optionally, the display panel further includes:

[0049] a common electrode;

[0050] a plurality of storage capacitors, the storage capacitors are disposed in one-to-one correspondence with the sub-pixels, the storage capacitors include a first electrode, a second electrode, and a capacitor dielectric layer, and the first electrode and the corresponding sub-pixel The sub-pixel electrode of the pixel is electrically connected, the second electrode is electrically connected to the common electrode, and the capacitor dielectric layer is disposed between the first electrode and the second electrode.

[0051] Optionally, one of the pixel units includes three of the sub-pixels, and the three sub-pixels are a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively.

[0052] Optionally, the data line drives the pixel unit to charge and discharge with a positive polarity or a negative polarity periodic inversion.

[0053] Optionally, the power consumption P of the data line driving integrated circuit, the capacitance C on the data line, the voltage charging/discharging frequency f, and the charging and discharging voltage range V satisfy the relationship 1>=. ^ ² /2.

[0054] Optionally, if the sub-pixels in the pixel unit are applied with a high voltage, the sub-pixels in the adjacent pixel units are applied with a low voltage lower than the high voltage.

Advantageous effects of the invention

Beneficial effect

[0055] In the technical solution of the embodiment of the present application, the display panel includes a plurality of pixel groups, the pixel group includes two pixel units arranged adjacently in the first direction, and the pixel unit includes adjacent rows arranged along the first direction. The driving method of the display panel includes: applying driving voltages of opposite polarities to two of the pixel units in the same pixel group; applying driving voltages of opposite polarities to adjacent two of the pixel units; A driving voltage having the same polarity is applied to the sub-pixels in the same pixel unit; and driving voltages of different voltage levels are respectively applied to the sub-pixels in the adjacent two of the pixel units. During the operation of the display panel, the scan line controls the turning on and off of the sub-pixels. When the sub-pixels are turned on, the data lines charge the sub-pixels to control the deflection direction of the liquid crystal, thereby controlling the display gradation of the sub-pixels. Optionally, the sub-pixels in the pixel unit respectively display different primary colors, and under the effect of spatial color mixing, the pixel unit displays a color corresponding to the image signal.

[0056] When the pixel units arranged in an array on the display panel are respectively displayed corresponding to the image signals, the implementation is completed. The display of the entire image. The sub-pixels of the same pixel unit are connected to the same data line and respectively connected to a different scan line. Since the cost of the scan line is lower than the cost of the data line, this arrangement is advantageous for reducing the production cost of the display panel.

[0057] The sub-pixels of the adjacent two pixel units are respectively connected to a different data line. During the operation of the display panel, the adjacent two pixel units are controlled by the driving voltages with opposite polarities, so that the same two pixels are adjacent to each other. The driving voltage of the unit is opposite in polarity, and the following technical effects can be achieved: the polarization effect of the display panel is weakened, the offset of the common voltage is reduced, and the positive and negative amplitudes of the driving voltage are symmetrical with respect to the common voltage, thereby avoiding the occurrence of flickering phenomenon. In the display panel architecture of the embodiment of the present application, the driving voltages of the sub-pixels in any two adjacent pixel units are opposite in polarity, thereby reducing the frequency required for the polarity of the data lines to be reversed between turns, so that the display The overall load of the panel is reduced; connecting the sub-pixels in the same pixel unit to the same data line, the polarity of the driving voltage is reversed in units of pixel units, reducing the operating frequency of the display panel; the low operating frequency is compared to the high operating frequency The circuit requirements of the display panel are lower, and the display panel can be effectively reduced while maintaining the display effect. Cost; under the same process conditions, better display effect can be achieved; low operating frequency reduces signal interference between multiple scan lines, multiple data lines and other circuit structures on the display panel, so that the display panel is displayed. More reliable. In summary, the technical solution of the embodiment of the present application improves the display effect of the display panel.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of an embodiment of a display device of the present application.

2 is a schematic structural view of a display panel of the display device of FIG. 1.

3 is a schematic structural view of a pixel group of the display panel of FIG. 2.

4 is a schematic flow chart of an embodiment of a driving method of a display panel of the present application.

5 is a schematic diagram showing a partial scan voltage and a partial driving voltage of the driving method of the display panel of FIG. 4.

[0063] wherein, in the dotted line frame in FIG. 2, a pixel group is shown, and in the dotted line frame in FIG. 3, a pixel unit is shown.

[0064] The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Embodiments of the invention

[0065] The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Throughout the description, it is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

[0066] It should be noted that if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present application, the directional indication is only used to explain at a certain The relative positional relationship between the components under a specific posture (as shown in the drawing), the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

[0067] In addition, if there is a description of "first", "second", etc. in the embodiment of the present application, the description of the "first", "second", etc. is for the purpose of description only, and is not understood as an indication. Or implied by its relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second" may expressly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.

[0068] Embodiments of the present application provide a display device.

In the embodiment of the present application, as shown in FIG. 1 to FIG. 3, the display device includes a display panel 10 and a driving device 20 of the display panel, and the display panel 10 includes a plurality of pixel groups 300, scan lines 100 and data. a line 200, the pixel group 300 includes two pixel units 310 arranged adjacently in the first direction; the pixel unit includes sub-pixels 311 arranged adjacently in the first direction; the plurality of scanning lines 100 extend in the second direction, the first direction Arranging; a plurality of data lines 200 extending in a first direction and a second direction; a plurality of sub-pixels 311 arranged in the same row are connected to the same scanning line 100, and sub-pixels 311 of adjacent pixel units 310 are respectively adjacent to The data line 200 is connected.

[0070] Specifically, during the operation of the display panel, the display of the image is realized by controlling the sub-pixel 311 of each pixel unit 310. The scan line 100 controls the turning on and off of the sub-pixel 311. When the scan voltage controls the scan line 100, all the sub-pixels 311 electrically connected to the scan line 100 are turned on, and the driving voltage control data line 200 is driven. The voltage is the driving voltage, and the plurality of turned-on sub-pixels 311 are respectively charged and discharged under the action of the corresponding data lines 200, so that the liquid crystals are deflected by corresponding angles to realize display of different gradations. [0071] One pixel unit 310 includes at least two sub-pixels 311. Generally, one pixel unit 310 includes three or more sub-pixels 311 to implement color image display. In the pixel unit 310 including the three sub-pixels 311, each of the sub-pixels 311 correspondingly displays a primary color, thereby causing the pixel unit 310 to display a color corresponding to the image; and in the pixel unit 310 including the three or more sub-pixels 311, The red sub-pixel 311a, the green sub-pixel 311b, and the blue sub-pixel 311c respectively corresponding to the three primary colors of red, green, and blue further include white sub-pixels or special sub-pixels to balance the display of the colored light to correct the color shift phenomenon of the display panel.

The sub-pixels 311 of the same pixel unit 310 are connected to the same data line 200 and are respectively connected to a different scan line 100. As shown in FIG. 2 and FIG. 3, taking the pixel unit 310 including three sub-pixels 311 as an example, the three sub-pixels 311 of the pixel unit 310 are connected to the same data line 200, and are respectively connected to the scan line 100 and connected to three sub-pixels. The three scan lines 100 of the pixel 311 are different. In the display panel, since the cost of the scan line 100 is lower than the cost of the data line 200, this architecture facilitates reducing the number of data lines 200, thereby reducing the cost of the display panel.

[0073] Further, the sub-pixels 311 of the adjacent two pixel units 310 are respectively connected to different data lines 200. During the driving process of the display panel, the adjacent two pixel units 310 are controlled by the driving voltages with opposite polarities to make the same The driving voltages of the sub-pixels 311 in the two-pixel unit 310 are opposite in polarity, and the following technical effects can be achieved: First, the polarization effect of the display panel is weakened, the offset of the common voltage is reduced, and the driving voltage is positive. The negative amplitude is symmetrical with respect to the common voltage, and the occurrence of flicker is avoided. Second, in the display panel architecture of the present application, the driving voltages of the sub-pixels in any two adjacent pixel units are opposite in polarity, thereby reducing the data. The polarity of the line is reversed with the frequency required to invert the turn, so that the overall load of the display panel is reduced. Third, the sub-pixels in the same pixel unit are connected to the same data line, and the polarity of the driving voltage is made in units of pixel units. Conversely, the operating frequency of the display panel is reduced. Fourth, the low operating frequency requires lower circuit requirements for the display panel than the high operating frequency. In the case of keeping the display effect unchanged, the manufacturing cost of the display panel can be effectively reduced; and under the same process conditions, a better display effect can be achieved; Fifth, the low operating frequency reduces the number of scan lines on the display panel. The signal interference between multiple data lines and other circuit structures makes the display panel display more reliable. In summary, the technical solution of the present application improves the display effect of the display panel.

[0074] In an embodiment of the present application, as shown in FIG. 2 and FIG. 3, the sub-pixel 311 includes a sub-pixel electrode and a driving transistor (not shown); the driving transistor includes a source electrode, a drain electrode, and a gate electrode. , source electrode and The data line 200 is electrically connected, the drain electrode is electrically connected to the sub-pixel electrode, and the gate electrode is electrically connected to the scan line 100. The sub-pixel electrode is made of a transparent conductive material such as indium tin oxide (ITO) to display an image normally. The scan voltage controls the gate electrode voltage of the drive transistor, which in turn controls the turn-on and turn-off of the drive transistor. When the scan voltage controls the driving transistor to start, the data line 200 charges the sub-pixel electrode through the drain electrode of the driving transistor, so that an electric field is generated between the sub-pixel electrode and the common electrode of the other substrate, and the liquid crystal is controlled to be deflected, thereby controlling the sub-pixel. The display gradation of 311.

In this embodiment, one pixel unit 310 includes three sub-pixels 311, which are respectively a red sub-pixel 311a, a green sub-pixel 311b, and a blue sub-pixel 311c, wherein the color is generated through the sub-pixel The electrode is provided corresponding to the color filter, and by controlling the display gradation of the red sub-pixel 311a, the green sub-pixel 311b, and the blue sub-pixel 311c, respectively, a plurality of colors can be generated by the spatial color mixing principle.

[0076] Further, the display panel further includes a common electrode and a plurality of storage capacitors. Since the liquid crystal filled between the two substrates is difficult to maintain the stability of the deflection electric field, in order to maintain the deflection direction of the liquid crystal to the next frame image, the storage is often set. The capacitor and the storage capacitor are disposed correspondingly to the sub-pixel 311, and are disposed on the substrate where the sub-pixel electrode is located. The storage capacitor includes a first electrode, a second electrode, and a capacitor dielectric layer. The first electrode is electrically connected to the sub-pixel electrode of the corresponding sub-pixel 311, the second electrode is electrically connected to the common electrode, and the capacitor dielectric layer is disposed on the first electrode and the second electrode. Between the electrodes, to maintain the stability of the electric field strength, the deflection angle of the liquid crystal is maintained.

[0077] In this embodiment, as shown in FIG. 2 and FIG. 3, the plurality of scan lines 100 are extended along the second direction and arranged in the first direction; the plurality of data lines 200 are extended along the first direction and arranged in the second direction; The plurality of sub-pixels 311 are arranged in a rectangular array, and the sub-pixels 311 of the same pixel unit 310 are arranged in the first direction; the plurality of sub-pixels 311 arranged in the same row are connected to the same scanning line 100, and the sub-pixels of the adjacent pixel units 310 311 is connected to adjacent data lines 200, respectively. The above-mentioned structure is clear in structure, and in order to isolate the insulation layer provided by different wires and the number of jumpers provided for connecting different wires, the process is simple, easy to maintain, and the probability of circuit failure is reduced, and the signal is reduced. Interference between.

[0078] Further, the sub-pixel 311 is arranged with the scan line 100, and the sub-pixel 311 and the data line 200 are arranged. Since the scan voltage of the scan line 100 and the drive voltage of the data line 200 are alternating current signals that vary with the turn, especially in the present embodiment, since the sub-pixels 311 of the same pixel unit 310 are connected to the same data line 200, In a traditional architecture, sub-pixels of the same pixel unit are respectively connected to a different data. The scanning frequency of the scanning line 100 in the embodiment of the present application is higher than that of the conventional architecture. In order to reduce the coupling between the high-frequency signals and avoid interference with the image of the display panel, the sub-pixel 311 and the scanning line 100 are arranged. The sub-pixel 311 is arranged with the data line 200 to improve the display effect.

[0079] An embodiment of the present application further provides a driving device for a display panel, and the specific structure of the display panel refers to the above embodiment. The driving device of the display panel comprises a control module, and the control module is used for:

[0080] applying opposite polarity driving voltages to two pixel units in the same pixel group;

[0081] applying opposite polarity driving voltages to adjacent two pixel units;

[0082] applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit;

[0083] A driving voltage of a different voltage level is respectively applied to the sub-pixels in the adjacent two pixel units.

[0084] The driving device of the display panel further includes a signal generating module.

[0085] In the driving process of the display panel, first, the signal generating module generates a scan voltage and a driving voltage according to the image signal to cause the display panel to correctly display the image. In the display process, a progressive scan or an interlaced scan is usually used, wherein the progressive scan has a better display resolution, and the interlaced scan has a lower scan frequency. In this embodiment, a progressive scan method will be described as an example. As shown in FIG. 5, the nth to n+5th scanning lines G(n), G(n+1), G(n+2), G(n+3), G(n+4) in FIG. , Schematic diagram of the scanning voltage of G(n+5) as a function of the turn-to-turn, and the variation of the driving voltage of the data line S(n) of the nth column in FIG. 2 with the turn-to-turn. The case where the sub-pixel driving transistor is an N-type transistor will be described as an example. If the driving transistor is a P-type transistor, the polarity of each signal is inverted.

[0086] On the same row, the gate electrodes of all the driving transistors are connected to the same scanning line 100, and when the control module controls the scanning voltage of the scanning line 100 to rise to a set high voltage, all the driving transistors on the row are In the 幵 state, the plurality of data lines 200 respectively charge the sub-pixel electrodes of the sub-pixels 311 on the row by the driving transistors. Thereafter, the voltage of the data lines 200 is a driving voltage corresponding to the image gradation information. During the charging process, a deflection electric field is formed between the sub-pixel electrode and the common electrode of the other substrate, and the liquid crystal is controlled to be set at an angle to display a corresponding gray scale. After the charging is completed, the control module controls the scan voltage of the scan line 100 to drop to a set low voltage, so that all the driving transistors on the row are turned off, and the voltage of the sub-pixel electrode is maintained, and the liquid crystal continues to be deflected to display an image until the next Recharge once.

[0087] The control module controls the scan lines to be turned on line by line, so that the data line 200 charges the sub-pixels 311 row by row. When the sub-pixels of all the rows on the display panel are charged, the effect of persistence of the human eye is added. Users can see To the full image. After the display of the image of the frame is completed, the driving device of the display panel repeats the above steps to realize the display of the image of the next frame, thereby realizing the display of the dynamic image.

[0088] The scan voltage and the driving voltage are generated according to the image signal, and the driving voltages of the data lines 200 connected to the sub-pixels 311 of the adjacent pixel units 310 are opposite in polarity, that is, in the same engraving, adjacent to the display panel The polarity of the sub-pixel electrodes is reversed to weaken the overall polarization of the display panel, reduce the offset of the common voltage, and make the positive and negative amplitudes of the driving voltage symmetrical with respect to the common voltage, thereby avoiding the occurrence of flicker. The data line drives the power consumption of the integrated circuit! ^5. The capacitance on the data line. The relationship between the voltage charging/discharging frequency f and the charging and discharging voltage range V satisfies the relationship P=CfV ² /2. As shown in FIG. 5, taking the data lines S(n) and S(n+1) connected to the adjacent two pixel units 310 as an example, at the same time, the data lines S(n) and S(n+1) The polarity is reversed, and on the same data line 200, the frequency at which the polarity of the driving voltage is reversed is greatly reduced, and the overall load of the display panel is proportional to the frequency, thereby reducing the overall load of the display panel. Further, the sub-pixels 311 in the same pixel unit are connected to the same data line 200, and the polarity of the driving voltage is reversed in units of the pixel unit 310, which reduces the operating frequency of the display panel. Moreover, the low operating frequency has lower requirements on the circuit of the display panel than the high operating frequency, and the manufacturing cost of the display panel can be effectively reduced while maintaining the display effect, and the same process condition can be realized better. The display effect; at the same time, the low working frequency reduces the signal interference between the plurality of scan lines 100, the plurality of data lines 200 and other circuit structures on the display panel, so that the display panel has higher display reliability, thereby improving the display. The display effect of the panel.

[0089] Further, the signal generating module includes:

[0090] a gray voltage calculation unit, configured to calculate a gray voltage of the data line according to the gray level information of the image signal; [0091] an offset voltage calculation unit, configured to calculate an offset voltage of the data line according to a spatial color mixing principle;

[0092] driving voltage generating unit, configured to add a gray voltage and an offset voltage to calculate a driving voltage of the data line, and generate a driving voltage;

[0093] wherein the offset voltages of the two data lines connected to the sub-pixels of the adjacent two pixel units are the same.

[0094] Specifically, in the display process of the display panel, since the image colors are the same or similar, when the liquid crystal deflection directions of the plurality of adjacent sub-pixels are the same, a specular reflection will occur, resulting in a color shift whitening phenomenon, especially in In the large viewing angle display panel, the above phenomenon is more serious due to the large color patch area of the same or similar colors. In order to correct the color shift whitening, in the display panel, the liquid crystal deflection direction of the adjacent sub-pixels is deflected at different angles with respect to the set direction of the current display gray scale, and then the color is corrected according to the spatial color mixing principle. Display, so that the liquid crystal deflection directions of adjacent sub-pixels are different, and diffuse reflection is formed to correct the color shift whitening. However, in the case of controlling the deflection direction of the adjacent sub-pixels, the signal switching frequency of the display panel is increased, and the overall load is increased. In this embodiment, the deflection direction of the liquid crystal is adjusted in units of pixel units, and the sub-pixels in the same pixel unit are connected to the same data line, and the offset voltages of the adjacent pixel units are the same, and the gray voltage is After the addition, the absolute value corresponding to the driving voltage has a positive offset and a negative offset with respect to the absolute value of the gray voltage, respectively, thereby correcting the color deviation under the effect of spatial color mixing, and simultaneously reducing the frequency of switching the signal of the display panel. , reducing the overall load.

[0095] Further, in this embodiment, the control module is configured to control the polarity reversal of the driving voltage, which not only spatially reduces the overall polarization of the display panel, but further implements a dot inversion effect on the daytime. The driving voltage of each sub-pixel is prevented from being in the same polarity, and the display of the display panel is affected by the DC blocking effect and the DC residual, thereby improving the display effect of the display panel.

[0096] An embodiment of the present application further provides a driving method of a display panel for driving a display panel. The specific structure of the display panel refers to the above embodiment. As shown in FIG. 2 and FIG. 4, the driving method of the display panel includes the following steps:

[0097] Step S100: applying driving voltages of opposite polarities to two pixel units in the same pixel group;

[0098] Step S200: applying driving voltages of opposite polarities to adjacent two pixel units;

[0099] Step S300: applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit;

[0100] Step S400: Apply driving voltages of different voltage levels to the sub-pixels in the adjacent two pixel units.

[0101] Before step S100, the driving method of the display panel includes:

[0102] Step S500: calculating a gray voltage according to the gray information of the image signal;

[0103] Step S600: calculating an offset voltage according to a spatial color mixing principle;

[0104] Step S700: Add the gray voltage and the offset voltage to calculate the driving voltage.

[0105] In the driving process of the display panel, the scanning voltage and the driving voltage are first generated according to the image signal to cause the display panel to correctly display the image. In the display process, a progressive scan or an interlaced scan is usually used, wherein the display resolution of the progressive scan is better, and the scan frequency of the interlaced scan is lower. In this embodiment, a display panel driving method will be described by taking a progressive scanning method as an example. Figure 5 shows the nth to n+5th scan lines G(n), G(n+1), G(n+2), G(n+3), G(n+4), Schematic diagram of the variation of the scanning voltage of G(n+5) with the turn-to-turn, and the variation of the driving voltage of the data line S(n) of the nth column in Fig. 2 with the turn-to-turn Figure. The case where the sub-pixel driving transistor is an N-type transistor will be described as an example. When the driving transistor is a P-type transistor, the polarity of each signal is inverted.

[0106] On the same line, the gate electrodes of all the driving transistors are connected to the same scanning line 100, and when the scanning voltage of the scanning line 100 rises to a set high voltage, all the driving transistors on the line are in the same state. In this state, the plurality of data lines 200 respectively charge the sub-pixel electrodes of the sub-pixels 311 on the row by the driving transistors. Thereafter, the voltage of the data lines 200 is the driving voltage corresponding to the image gradation information. During the charging process, a deflection electric field is formed between the sub-pixel electrode and the common electrode of the other substrate, and the liquid crystal deflection setting angle is controlled to display the corresponding gray scale. After the charging is completed, the scan voltage of the scan line 100 drops to a set low voltage, so that all the driving transistors on the line are turned off, and the voltage of the sub-pixel electrode is maintained, and the liquid crystal continues to be deflected to display an image until the next recharge. .

[0107] The scan lines are turned on line by line, so that the data line 200 charges the sub-pixels 311 row by row. When the sub-pixels of all the rows on the display panel are charged, the user's visual persistence is added, and the user can watch To the full image. After the display of the image of the frame is completed, the above steps are repeated to realize the display of the image of the next frame, thereby realizing the display of the dynamic image.

[0108] The scan voltage and the driving voltage are generated according to the image signal, and the driving voltages of the data lines 200 connected to the sub-pixels 311 of the adjacent pixel units 310 are opposite in polarity, that is, at the same engraving, adjacent to the display panel The polarity of the sub-pixel electrodes is reversed to weaken the overall polarization of the display panel, reduce the offset of the common voltage, and make the positive and negative amplitudes of the driving voltage symmetrical with respect to the common voltage, thereby avoiding the occurrence of flicker. As shown in FIG. 5, taking the data lines S(n) and S(n+1) connected to the adjacent two pixel units 310 as an example, at the same time, the data lines S(n) and S(n+1) The polarity is reversed, and on the same data line 200, the frequency at which the polarity of the driving voltage is reversed is greatly reduced, and the overall load of the display panel is proportional to the frequency, thereby reducing the overall load of the display panel. Further, the sub-pixels 311 in the same pixel unit are connected to the same data line 200, and the polarity of the driving voltage is reversed in units of the pixel unit 310, which reduces the operating frequency of the display panel. Moreover, the low operating frequency has lower requirements on the circuit of the display panel than the high operating frequency, and the manufacturing cost of the display panel can be effectively reduced while maintaining the display effect, and the same process condition can be realized better. The display effect; at the same time, the low working frequency reduces the signal interference between the plurality of scan lines 100, the plurality of data lines 200 and other circuit structures on the display panel, so that the display panel has higher display reliability, thereby improving the display. The display effect of the panel. [0109] In the display process of the display panel, since the image colors are the same or similar, when the liquid crystal deflection directions of the plurality of adjacent sub-pixels are the same, a specular reflection will occur, resulting in a color shift whitening phenomenon, especially in a large viewing angle display. In the panel, the above phenomenon is more serious due to the large color patch area of the same or similar colors. In order to correct the color shift whitening, in the display panel, the liquid crystal deflection direction of the adjacent sub-pixels is deflected at different angles with respect to the set direction of the current display gray scale, and then the color display is corrected according to the spatial color mixing principle, thereby making the phase The liquid crystal deflection directions of the adjacent sub-pixels are different, and diffuse reflection is formed to correct the color shift whitening. However, in the case of controlling the deflection direction of the adjacent sub-pixels, the signal switching frequency of the display panel is increased, and the overall load is increased. In this embodiment, the deflection direction of the liquid crystal is adjusted in units of pixel units, and the sub-pixels in the same pixel unit are connected to the same data line, and the offset voltages of the adjacent pixel units are the same, and the gray voltage is After the addition, the absolute value corresponding to the driving voltage has a positive offset and a negative offset with respect to the absolute value of the gray voltage, respectively, thereby correcting the color deviation under the effect of spatial color mixing, and simultaneously reducing the frequency of switching the signal of the display panel. , reducing the overall load.

[0110] Further, in this embodiment, the polarity of the driving voltage is periodically inverted, which not only spatially reduces the overall polarization of the display panel, but also implements a dot inversion effect on the daytime, avoiding each sub-pixel. The driving voltages are in the same polarity for a long time, so that the display of the display panel is affected by the DC blocking effect and the DC residual, thereby improving the display effect of the display panel.

Industrial applicability

[0111] In the technical solution of the embodiment of the present application, the display panel includes a plurality of pixel groups, the pixel group includes two pixel units arranged adjacently in the first direction, and the pixel unit includes adjacent rows arranged along the first direction. The driving method of the display panel includes: applying driving voltages of opposite polarities to two of the pixel units in the same pixel group; applying driving voltages of opposite polarities to adjacent two of the pixel units Applying a driving voltage of the same polarity to the sub-pixels in the same pixel unit; and applying driving voltages of different voltage levels to the sub-pixels in the adjacent two of the pixel units. During the operation of the display panel, the scan line controls the turning on and off of the sub-pixels. When the sub-pixels are turned on, the data lines charge the sub-pixels to control the deflection direction of the liquid crystal, thereby controlling the display gradation of the sub-pixels. Optionally, the sub-pixels in the pixel unit respectively display different primary colors, and under the effect of spatial color mixing, the pixel unit displays a color corresponding to the image signal.

[0112] When the pixel units arranged in an array on the display panel are respectively displayed corresponding to the image signals, the implementation is completed. The display of the entire image. The sub-pixels of the same pixel unit are connected to the same data line and respectively connected to a different scan line. Since the cost of the scan line is lower than the cost of the data line, this arrangement is advantageous for reducing the production cost of the display panel.

[0113] The sub-pixels of the adjacent two pixel units are respectively connected to different data lines. During the operation of the display panel, the adjacent two pixel units are controlled by the driving voltages with opposite polarities, so that the adjacent two pixel units are the same. The driving voltage is opposite in polarity, and the following technical effects can be achieved: the polarization effect of the display panel is weakened, the offset of the common voltage is reduced, and the positive and negative amplitudes of the driving voltage are symmetrical with respect to the common voltage, thereby avoiding the flicker phenomenon. In the display panel architecture of the embodiment of the present application, the driving voltages of the sub-pixels in any two adjacent pixel units are opposite in polarity, thereby reducing the frequency required for the polarity of the data lines to be reversed between turns. The overall load of the display panel is reduced; connecting the sub-pixels in the same pixel unit to the same data line, the polarity of the driving voltage is reversed in units of pixel units, reducing the operating frequency of the display panel; The frequency has lower requirements on the circuit of the display panel, and the display panel can be effectively reduced while maintaining the display effect. Causes this; under the same process conditions, better display effect can be achieved; low operating frequency reduces the signal interference between multiple scan lines, multiple data lines and other circuit structures on the display panel, making the display panel The display is more reliable. In summary, the technical solution of the embodiment of the present application improves the display effect of the display panel.

[0114] The above description is only an optional embodiment of the present application, and is not intended to limit the scope of the patent application, and the equivalent structural transformations made by the present specification and the contents of the drawings, or Direct/indirect use in other related technical fields is included in the scope of patent protection of this application.

Claims

Claim

[Claim 1] A driving method of a display panel, wherein the display panel includes a plurality of pixel groups, the pixel group includes two pixel units arranged adjacently in the first direction; the pixel unit includes the first direction Adjacent sub-pixels;

The driving method of the display panel includes:

Calculating a gray voltage according to gray scale information of the image signal;

Calculating the offset voltage according to the principle of spatial color mixing;

Adding the gray voltage and the offset voltage to calculate a driving voltage;

Applying opposite polarity driving voltages to two of the pixel units in the same pixel group; applying opposite polarity driving voltages to adjacent two of the pixel units; for the sub-pixels in the same pixel unit A driving voltage having the same polarity is applied; and driving voltages of different voltage levels are respectively applied to the sub-pixels in the adjacent two of the pixel units.

[Claim 2] The driving method of the display panel according to claim 1, wherein the polarity of the driving voltage is periodically inverted.

[Claim 3] The driving method of the display panel according to claim 1, wherein the sub-pixel further includes a sub-pixel electrode;

a driving transistor, the driving transistor includes a source electrode, a drain electrode and a gate electrode, the source electrode is electrically connected to the data line, the drain electrode is electrically connected to the sub-pixel electrode, and the gate electrode and the scan line are electrically connected connection.

The method of driving a display panel according to claim 3, wherein the data line is charged and discharged by driving the pixel unit with a positive polarity or a negative polarity periodically.

[Claim 5] The driving method of the display panel according to claim 3, wherein the data line drives the power consumption P of the integrated circuit, the capacitance C on the data line, the voltage charging and discharging frequency f, and the charge and discharge The relationship between the voltage ranges V is satisfied P = CfV ² /2.

The method of driving a display panel according to claim 3, wherein the display panel further comprises: Common electrode

a plurality of storage capacitors, the storage capacitors are disposed in one-to-one correspondence with the sub-pixels, the storage capacitors include a first electrode, a second electrode, and a capacitor dielectric layer, and the first electrode and the corresponding sub-pixel sub-pixel The pixel electrode is electrically connected, the second electrode is electrically connected to the common electrode, and the capacitor dielectric layer is disposed between the first electrode and the second electrode.

[Claim 7] The driving method of the display panel according to claim 1, wherein one of the pixel units includes three of the sub-pixels, and the three sub-pixels are red sub-pixel, green sub-pixel, and blue Subpixel.

[Claim 8] The driving method of the display panel according to claim 1, wherein if the sub-pixel in the pixel unit is applied with a high voltage, the sub-pixel in the adjacent pixel unit is A low voltage lower than the high voltage is applied.

[Claim 9] A driving device for a display panel, wherein the display panel includes a plurality of pixel groups, the pixel group includes two pixel units arranged adjacently in the first direction; and the pixel unit includes the first direction Adjacent sub-pixels;

The driving device of the display panel includes a control module, wherein the control module is configured to: apply driving voltages of opposite polarities to two of the pixel units in the same pixel group; and apply poles to two adjacent pixel units Driving voltages of opposite polarity are applied to the sub-pixels in the same pixel unit; driving voltages of different voltage levels are respectively applied to the sub-pixels in two adjacent pixel units;

Controlling the polarity of the driving voltage to be periodically reversed;

And the driving device of the display panel includes a signal generating module, and the signal generating module includes:

a gray voltage calculation unit for calculating a gray voltage according to gray scale information of the image signal; an offset voltage calculation unit for calculating an offset voltage according to a spatial color mixing principle; and a driving voltage generating unit for adding the gray scale The voltage and the offset voltage are used to calculate the driving voltage.

[Claim 10] The driving device of the display panel according to claim 9, wherein the sub-pixels include: Subpixel electrode

The driving device for a display panel according to claim 10, wherein the data line is charged and discharged by driving the pixel unit with a positive polarity or a negative polarity periodically.

[Claim 12] The driving device of the display panel according to claim 11, wherein the data line drives the power consumption P of the integrated circuit, the capacitance C on the data line, the voltage charge and discharge frequency f, and the charge and discharge The relationship between the voltage ranges V is satisfied P = CfV ² /2.

[Claim 13] The driving device of the display panel according to claim 9, wherein if the sub-pixel in the pixel unit is applied with a high voltage, the sub-pixel in the adjacent pixel unit is A low voltage lower than the high voltage is applied.

[Claim 14] A display device, comprising:

a display panel, the display panel includes a plurality of pixel groups, scan lines, and data lines, the pixel group includes two pixel units arranged adjacently in the first direction; the pixel unit includes adjacent pixels arranged along the first direction a plurality of the scan lines extending in the second direction and arranged in the first direction; a plurality of the data lines extending along the first direction and arranged in the second direction; and the plurality of the sub-pixels arranged in the same row and the same One of the scan lines is connected, and the sub-pixels of the adjacent pixel units are respectively connected to the adjacent data lines; the driving device of the display panel includes a control module, and the control module is configured to: Applying a driving voltage of opposite polarity to two of the pixel units in the pixel group; applying a driving voltage of opposite polarity to two adjacent pixel units; applying a pole to the sub-pixel in the same pixel unit Driving voltages of the same voltage level; respectively, applying driving voltages of different voltage levels to the sub-pixels in two adjacent pixel units;

Controlling the polarity of the driving voltage to be periodically reversed;

The driving device of the display panel includes a signal generating module, and the signal generating module includes: a gray voltage calculation unit for calculating a gray voltage according to gray scale information of the image signal; an offset voltage calculation unit for calculating an offset voltage according to a spatial color mixing principle; and a driving voltage generating unit for adding the gray scale The voltage and the offset voltage are used to calculate the driving voltage.

The display device according to claim 14, wherein the sub-pixels comprise:

Subpixel electrode

a driving transistor, the driving transistor includes a source electrode, a drain electrode and a gate electrode, the source electrode is electrically connected to the data line, the drain electrode is electrically connected to the sub-pixel electrode, the gate electrode and the scan Line electrical connection.

The display device according to claim 15, wherein the display panel further comprises: a common electrode;

a plurality of storage capacitors, the storage capacitors are disposed in one-to-one correspondence with the sub-pixels, the storage capacitors include a first electrode, a second electrode, and a capacitor dielectric layer, and the first electrode and the corresponding sub-pixel sub-pixel The pixel electrode is electrically connected, the second electrode is electrically connected to the common electrode, and the capacitor dielectric layer is disposed between the first electrode and the second electrode. The display device according to claim 14, wherein one of said pixel units includes three said sub-pixels, and said three sub-pixels are red sub-pixels, green sub-pixels, and blue sub-pixels, respectively. The display device according to claim 14, wherein the data line is charged and discharged by driving the pixel unit with a positive polarity or a negative polarity periodically.

The display device according to claim 14, wherein the data line drives the power consumption of the integrated circuit? The relationship between the capacitance C on the data line, the voltage charge/discharge frequency f, and the voltage range V of charge and discharge is satisfied by P = CfV 2/2.

The display device according to claim 14, wherein if the sub-pixels in the pixel unit are applied with a high voltage, the sub-pixels in the adjacent pixel units are applied lower than the high voltage low voltage.