CN116312407A - Display device and driving method - Google Patents
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- CN116312407A CN116312407A CN202310132520.7A CN202310132520A CN116312407A CN 116312407 A CN116312407 A CN 116312407A CN 202310132520 A CN202310132520 A CN 202310132520A CN 116312407 A CN116312407 A CN 116312407A
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000003086 colorant Substances 0.000 claims abstract description 28
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 239000012071 phase Substances 0.000 claims description 5
- 239000012073 inactive phase Substances 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 238000009792 diffusion process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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Abstract
The embodiment of the invention discloses a display device and a driving method. The display device comprises a backlight module and a display panel, wherein the backlight module comprises a plurality of light-emitting units with various colors; the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with at least one light-emitting unit with different colors; the display device includes a plurality of refresh frames during an operation time, each refresh frame including a plurality of driving periods; in any one of the driving periods, the driving method includes: charging pixel units in the display panel; and sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas with which the pixel units are charged. The embodiment of the invention can solve the problem of color cast of display caused by abnormal lighting of the pixel units due to halation of the light-emitting units, ensure that the display panel can display with accurate color and brightness in the same driving period, and improve the color cast problem of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display device and a driving method.
Background
At present, in order to improve resolution, a scheme of field sequential driving color mixing is generally selected for a display panel, that is, a pixel opening is provided in a pixel unit, light emitting units with different colors in the pixel unit share the pixel opening, and then color matching of the light emitting units with different colors in the pixel unit is realized by using an integral effect of human eyes in a mode that the light emitting units with different colors are sequentially lightened.
However, because a certain halation phenomenon exists when the light-emitting unit emits light, crosstalk can be generated on the adjacent and unopened light-emitting units, so that color shift occurs in sub-frame display, and the display accuracy of each sub-frame picture is affected.
Disclosure of Invention
The invention provides a display device and a driving method, which are used for ensuring that pixel units in a display panel can display with accurate colors and brightness and improving the color cast problem of the display panel.
In a first aspect, an embodiment of the present invention provides a driving method of a display device, where the display device includes a backlight module and a display panel, and the display panel is located on a light emitting side of the backlight module;
the backlight module comprises a plurality of light-emitting units with various colors;
the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with at least one light-emitting unit with different colors;
the display device includes a plurality of refresh frames during an operation time, each of the refresh frames including a plurality of driving periods;
in any one of the driving periods, the driving method includes:
charging the pixel units in the display panel;
and sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas which are charged by the pixel units.
In a second aspect, an embodiment of the present invention further provides a display device, configured to perform the driving method according to any one of the first aspect, where the display device includes a backlight module and a display panel, and the display panel is located on a light emitting side of the backlight module;
the backlight module comprises a plurality of light-emitting units with various colors;
the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with one light-emitting unit with different colors.
According to the technical scheme, the pixel units in the display panel are firstly charged, and then the light emitting units corresponding to the independent control areas where the charged pixel units are located are lightened, so that when the light emitting units are lightened, the pixel units in the independent control areas corresponding to the light emitting units can be lightened, at the moment, the emergent and diffuse light rays of the light emitting units can form backlight of the corresponding independent control areas, and therefore when the pixel units which are not fully charged and the pixel units which are not fully charged exist in adjacent sub-pixels at the same time, the fact that the backlight lightened correspondingly to the pixel units which are not fully charged is diffused into the pixel units which are not fully charged can be avoided, and the accurate display of the pixel units is affected. The embodiment of the invention can solve the problem of color cast of display caused by abnormal lighting of the pixel units due to halation of the light-emitting units, and can avoid interference of halation diffusion among the pixel units in the same independent control area, thereby weakening influence of abnormal light emission of adjacent pixel units caused by halation diffusion in the whole panel, ensuring that the pixel units in the display panel can display in accurate color and brightness in the same driving period, ensuring that the display panel can meet the display requirement of a target picture in color and brightness, and improving the color cast problem of the display panel.
Drawings
Fig. 1 is a top view of a display device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of driving the display device shown in FIG. 1;
FIG. 3 is a driving timing diagram of the driving method of the display device shown in FIG. 2;
FIG. 4 is a flowchart of another driving method of a display device according to an embodiment of the present invention,
FIG. 5 is a driving timing diagram of the driving method of the display device shown in FIG. 4;
FIG. 6 is a flowchart of a driving method of a display device according to another embodiment of the present invention;
fig. 7 is a top view of another display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for any order, quantity, or importance, but rather are used to distinguish between different components. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The term "comprising" and variants thereof as used herein is intended to be open ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment".
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between corresponding contents and not for defining a sequential or interdependent relationship.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
Fig. 1 is a schematic structural diagram of a backlight module in the related art, referring to fig. 1, in the related art, the backlight module is provided with light emitting units with different colors, for example, red, green and blue LEDs, the three color LEDs are respectively arranged in an array and are sequentially staggered, and a pixel unit on a display panel correspondingly provides a light source for the adjacent red, green and blue LEDs. Specifically, the display panel performs pixel color matching by adopting a field sequential driving color mixing mode, namely, for any one pixel unit, a pixel opening is formed, and in one display frame, three corresponding red, green and blue LEDs are respectively driven to be lightened in three display subframes, so that the color matching of the pixel unit is realized by utilizing the integral effect of human eyes on the three display subframes, and the specific color required by a picture is formed in the display frame, so that each pixel unit macroscopically displays the picture.
In a specific driving process, in a process of sequentially charging and turning on pixel units in a certain display subframe, corresponding LEDs are synchronously lightened. However, since there is a certain halo in the LED, that is, the light will be diffused to a certain extent after the LED is turned on, the LED will also have a certain backlight light for the pixel units that are not turned on by charging nearby. The existing display panel is generally a liquid crystal display panel, and the liquid crystal unit of the existing display panel generally has light leakage to a certain extent, so that the pixel unit which is in a closed state is enabled to emit light, namely to be lightened in abnormal time, and therefore the pixel unit of the display subframe cannot display in accurate color and brightness, and the phenomenon of color cast of display occurs.
Based on the technical problems described above, the embodiment of the invention provides a driving method of a display device. Firstly, the display device comprises a backlight module and a display panel, wherein the display panel is positioned on the light emitting side of the backlight module; the backlight module comprises a plurality of light-emitting units with various colors; the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with one light-emitting unit with different colors. The display device includes a plurality of refresh frames during an operation time, each refresh frame including a plurality of driving periods. In any one of the driving periods, the driving method includes:
charging pixel units in the display panel;
and sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas with which the pixel units are charged.
According to the technical scheme, the pixel units in the display panel are firstly charged, and then the light-emitting units corresponding to the independent control areas where the charged pixel units are located are lightened, so that when the light-emitting units are lightened, the pixel units in the independent control areas corresponding to the light-emitting units can be lightened, light rays emitted and diffused by the light-emitting units can form backlight of the corresponding independent control areas, and therefore when the pixel units which are not fully charged and the pixel units which are not fully charged exist in adjacent sub-pixels at the same time, the backlight which is lightened correspondingly to the pixel units which are not fully charged can be prevented from being diffused into the pixel units which are not fully charged, brightness which is not required to exist is generated by the pixel units which are not fully charged, and accurate display of the pixel units is affected. The embodiment of the invention can solve the problem of color cast of display caused by abnormal lighting of the pixel units due to halation of the light-emitting units, and can avoid interference of halation diffusion among the pixel units in the same independent control area, thereby weakening influence of abnormal light emission of adjacent pixel units caused by halation diffusion in the whole panel, ensuring that the pixel units in the display panel can display in accurate color and brightness in the same driving period, ensuring that the display panel can meet the display requirement of a target picture in color and brightness, and improving the color cast problem of the display panel.
Fig. 1 is a top view of a display device according to an embodiment of the present invention, referring to fig. 1, first, the display device includes a backlight module 100 and a display panel 200 (the backlight module 100 and the display panel 200 overlap due to the viewing angle problem in the figure), and the display panel 200 is located at the light emitting side of the backlight module 100; the backlight module 100 includes a plurality of light emitting units 110 of a plurality of colors; the display panel 200 includes a plurality of independent control regions 210, the independent control regions 210 include at least one pixel unit 211, and each independent control region 210 is correspondingly provided with a respective light emitting unit 110 of a different color. Fig. 2 is a flowchart of a driving method of the display device shown in fig. 1, fig. 3 is a driving timing chart of the driving method of the display device shown in fig. 2, and referring to fig. 1 to fig. 3, a driving method according to an embodiment of the present invention is a display device according to the above embodiment. Based on the structure of the display device described above, the display device may include a plurality of refresh frames T each including a plurality of driving periods T during an operation time when driving display. The driving period t is understood herein as a display subframe, and generally, the light emitting units 110 of three colors of red, green and blue are disposed in the display device, and accordingly, three display subframes of red, green and blue are disposed. The embodiment of the invention is mainly limited to the driving process of each display subframe, and specifically, in any driving period t, the driving method comprises the following steps:
s110, charging the pixel units in the display panel.
First, as shown in fig. 1, the display panel 200 is exemplified as a liquid crystal display panel, and it will be understood by those skilled in the art that each pixel unit 211 in the liquid crystal display panel has a liquid crystal pixel and a pixel driving circuit, and the pixel driving circuit is responsible for controlling the on and off of the liquid crystal pixel, that is, controlling whether the backlight is emitted or not and the transmittance of the backlight through the cooperation of the liquid crystal pixels, which is macroscopically embodied as controlling whether the pixel unit is lighted or not and the brightness of the pixel unit. The pixel driving circuit is generally provided with a storage capacitor for storing data voltages, and is used for stably controlling the opening of the liquid crystal pixels in the releasing process. The backlight is provided by the backlight module 100, in which the light emitting units 110 are disposed, and as exemplified above, when the light emitting units 110 of three colors of red, green and blue are disposed in the backlight module 100, the three light emitting units 110 of red, green and blue may form a backlight unit capable of being independently controlled, and the pixel area formed by at least one pixel unit 211 may be correspondingly controlled on the display panel 200, that is, the independent control area 210. The pixel units 211 in the independent control region 210 are independently controlled by the three red, green and blue light emitting units 110 to provide backlight, and the three red, green and blue light emitting units 110 control lighting in three display subframes according to a field sequential driving color mixing scheme. As illustrated in fig. 1, one independent control region 210 is provided with one row of light emitting units 110 of three colors red, green and blue, respectively.
Based on the above display device structure, this step charges the pixel unit 211 in the display panel 200, essentially charges the storage capacitor of the pixel driving circuit in the pixel unit 211, and performs the charging process at the t_1 stage shown in fig. 3. During the charging process, the liquid crystal pixel is not turned on or is not turned on stably, and the pixel unit 211 is turned off or is not turned on normally.
And S120, sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas with which the pixel units are charged.
This step is a process of turning on the backlight to light the pixel units 211 in the entire independent control area 210 after the pixel units 211 in the independent control area 210 are charged, and the backlight lighting process is performed at the t_2 stage as shown in fig. 3. Taking this driving period t as an example of a red display subframe, and an independent control region 210 is correspondingly provided with a row of red light emitting units 1101, when the row of red light emitting units 1101 are turned on, the pixel units 211 in the independent control region 210 are all provided with red backlight and can be turned on as red pixels. Therefore, when the red light emitting unit 1101 corresponding to the independent control area 210 with the charged pixel units is turned on, it means that the pixel units 211 in the independent control area 210 need to be charged before the red light emitting unit 1101 is turned on, and the pixel units 211 with the charged pixel units 211 are in a stable on state, and at this time, the pixel units 211 in the whole independent control area 210 can be stably turned on as red pixels. The lighting units 110 of the independent control areas 210 that complete the charging of the pixel units are turned on sequentially or synchronously, which means that the multiple independent control areas 210 in the display panel can be turned on synchronously or sequentially.
Based on the lighting process of the light emitting units, each of the independent control regions 210 is charged when the backlight is lighted, that is, the pixel units 211 are turned on. When one of the adjacent pixel units 211 in the same independent control area 210 has completed charging and the other has not completed charging, the pixel unit 211 which has not completed charging will not be abnormally lighted due to light leakage or light diffusion of the pixel unit 211 which has completed charging, in other words, the problem of mutual crosstalk caused by asynchronous backlight lighting between the adjacent pixel units 211 in the same independent control area can be avoided, thereby ensuring that the pixel units in the display panel can display in accurate color and brightness in the same driving period, enabling the display panel to meet the display requirement of the target picture in terms of color and brightness, and improving the color cast problem of the display panel.
Based on the above-described embodiment, in the above-described step S120 of the driving method, the color of the light emitting unit that is lit up per driving period is different in the same refresh frame. In the above embodiment, the driving period may be understood as a display sub-frame, and the lighting units with different colors are turned on in each display sub-frame of the same refresh frame, so that different display sub-frames display different colors, and therefore, for each pixel unit 211, different colors are displayed in each refresh frame, so that the color mixing can be driven in sequence, and the purpose of displaying a picture is achieved.
With continued reference to fig. 1 to 3, in one embodiment of the present invention, the step S120 of sequentially or synchronously turning on the light emitting units of one color corresponding to the independent control areas where the charging of the pixel units is completed may include:
and S121, after all the pixel units are charged, all the light-emitting units with the same color corresponding to all the independent control areas are uniformly lightened.
This step is essentially to turn on all the pixel cells and then turn on the backlight driving process. It can be understood that, since all the pixel units are charged and all need to be lightened for displaying, the problem that the pixel units which are not turned on are interfered by the pixel units which are turned on after the backlight is lightened is avoided, so that the display panel is ensured to accurately display color and brightness in the same driving period.
Further, on this basis, the step S120 may be further selected, after all the pixel units are charged, to uniformly light all the light emitting units of the same color corresponding to all the independent control areas, including:
after all pixel units are charged, lighting all the light-emitting units with the same color corresponding to all the independent control areas uniformly, and continuously lighting for a first preset time period t_1; wherein, the duration duty ratio of the first preset duration t_1 in the driving period is less than or equal to 0.3..
At this time, in the driving period, the light emitting units are uniformly turned on and kept in the first preset time t_1, that is, the time for displaying the backlight in one display subframe is indicated as the first preset time t_1, and the time occupation ratio of the first preset time t_1 in the driving period is set to be less than 0.3, so that a longer time can be reserved for the charging process, sufficient time is provided for charging a plurality of pixel units on the display panel, sufficient charging of the pixel units is ensured, and color cast or insufficient brightness caused by insufficient charging time is avoided when the pixel units emit light. In addition, it should be noted that, at this time, the length-to-duty ratio is based on the time length control performed by the control chip, and further, based on the existing refresh frequency, on the basis of ensuring that the pixel unit is fully charged, at this time, the time length-to-duty ratio of the first preset time length t_1 in the driving period thereof may be in the vicinity of 0.07.
In addition to the above scheme of synchronously lighting all the light emitting units, the embodiment of the invention also provides another driving method. Fig. 4 is a flowchart of another driving method of a display device according to an embodiment of the present invention, and fig. 5 is a driving timing chart of the driving method of the display device shown in fig. 4, first, the embodiment is an optimization based on the previous embodiment, in the display device according to the embodiment, a plurality of independent control regions 210 are sequentially arranged along a row direction X and a column direction Y, respectively. Further, on the basis of the above-described embodiments, charging a pixel unit in a display panel includes:
sequentially charging the pixel units of the plurality of independent control areas along the row direction and/or the column direction;
sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control areas with the completed pixel unit charging, including:
and sequentially lighting the light-emitting units of one color corresponding to each row of independent control areas which are charged by the pixel units along the row direction and/or the column direction.
For details not yet elaborated in this embodiment, reference is made to the above embodiments, specifically, referring to fig. 1, 4 and 5, the driving method of the display device includes:
and S210, sequentially charging the pixel units of the plurality of independent control areas along the row direction and/or the column direction.
The step is essentially to charge the pixel units 211 of the independent control areas 210 row by row according to the arrangement of the independent control areas 210, specifically, to charge the pixel units 211 of the next independent control area 210 after the pixel units 211 in one independent control area 210 are charged, and to charge the pixel units 210 in the next independent control area 210 according to the row and column arrangement of the independent control areas 210 from left to right and from top to bottom. As illustrated in fig. 1 and 5, illustratively, three independent control regions 210 arranged in the column direction in the display panel are sequentially charged at three stages t1_1, t1_2, and t1_3, respectively, in one driving period.
S220, lighting the light-emitting units of one color corresponding to each row of independent control areas which are charged by the pixel units along the row direction and/or the column direction.
Based on the charging manner in the above step, after the pixel units 211 in each independent control area 210 are charged, the corresponding light emitting units 110 in the backlight module 100 can be turned on. Thus, the lighting process of the light emitting units 110 is also sequentially lighted in the order of row and column arrangement. As shown in fig. 1 and 5, illustratively, three independent control regions 210 arranged in a column direction in the display panel sequentially illuminate corresponding light emitting units in the backlight module at three stages t1_2, t2_2 and t3_2, respectively, during one driving period. The t1_2 stage is located after t1_1, which indicates that the light emitting units corresponding to the first independent control regions 210 arranged along the columns are turned on after the pixel units 211 are charged, and the remaining independent control regions are the same, which is not described herein. After charging is completed to one independent control area 210 along the arrangement sequence of the rows and the columns, the light emitting units 110 are correspondingly lightened, and the charged and uncharged pixel units 211 in the independent control area 210 can be avoided, so that the problem of mutual crosstalk caused by asynchronous backlight lighting among the pixel units 211 in the same independent control area can be prevented, the pixel units in the display panel can be ensured to display in the same driving period with accurate color and brightness, the display panel can meet the display requirement of a target picture in color and brightness, and the color cast problem of the display panel is improved.
It should be noted that, the display panel in fig. 1 is divided into three independent control areas along the column direction, and the independent control areas may be arranged along the row direction or along both the row direction and the column direction, so that charging and lighting the backlight may be performed sequentially along the row direction and/or the column direction during driving.
With continued reference to fig. 4 and 5, further, based on the step S220, sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control areas where the pixel unit charging has been completed, the method may further include:
and S230, maintaining the lighting state of the lighting units corresponding to the lighted independent control areas of each row until the current driving period is finished.
The step is to ensure that the pixel units which are lighted later and the pixel units which are lighted before are lighted synchronously, so that the whole display panel can display a complete picture at the current moment, and each sub-frame can be matched with each other to achieve a good field sequence driving color mixing effect, and the visual effect for users is better.
On the basis of the above embodiment, in order to ensure the mutual coordination of the display panel and the backlight module in time, a synchronization signal needs to be set to synchronize the driving of the display panel and the backlight module, so that the embodiment of the invention provides a driving method of a display device. Fig. 6 is a flowchart of a driving method of a display device according to another embodiment of the present invention, which is further optimized based on the above embodiment, wherein the following steps may be added:
acquiring a synchronous signal; wherein, in any refresh frame, the synchronous signal comprises an active phase and an inactive phase
Charging the pixel cells in the display panel may include:
in the effective stage of the synchronous signal, charging the pixel units in the display panel;
sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control areas with the completed pixel unit charging, the method can comprise the following steps:
and in the effective stage Ta of the synchronous signal, the luminous units of one color corresponding to the independent control areas which are charged by the pixel units are sequentially or synchronously lightened.
For details not yet elaborated in this embodiment, reference is made to the above embodiments, specifically, referring to fig. 3, 5 and 6, the driving method of the display device includes:
s310, acquiring a synchronous signal; wherein, in any refresh frame, the synchronous signal comprises an active phase and an inactive phase;
as shown in fig. 3 and 5, the synchronization signal Vsync includes an active phase Ta in which the backlight module 100 and the display panel 200 synchronously perform related actions, and an inactive phase Tb in which the backlight module 100 and the display panel 200 prepare for the execution actions of the active phase Ta.
S320, in the effective stage of the synchronous signal, charging the pixel units in the display panel;
s330, at the effective stage of the synchronous signal, the light-emitting units of one color corresponding to the independent control areas which are charged by the pixel units are sequentially or synchronously lightened.
In the steps S320 and S330, the backlight module 100 and the display panel 200 perform the related operations of charging and lighting the backlight in the active stage Ta of the synchronization signal Vsync, and based on the synchronization signal Vsync, the synchronous driving of the backlight module 100 and the display panel 200 is achieved.
The embodiment of the invention also designs the display device correspondingly aiming at the driving method. Fig. 7 is a top view of another display device according to an embodiment of the present invention, referring to fig. 7, the same row of light emitting units 110 with the same color may be sequentially divided into at least two groups along the row direction X, each group of light emitting units 110 is sequentially connected in series, and the light emitting units 110 of different groups are connected in parallel.
At this time, the light emitting units 110 of different groups are substantially in parallel connection, so that the number of the light emitting units 110 of the same group connected in series can be reduced, the problem of overlarge pressure difference between the light emitting units 110 at two ends caused by too many light emitting units 110 connected in series can be avoided, and the uniform light emitting brightness of each light emitting unit 110 can be further ensured. In addition, the light emitting units 110 in the same row are connected in parallel in the same group in series and different groups, so that the light emitting units 110 in the same row can be driven to light by one driving signal, driving signals required by the panel can be reduced, and the design of a driving circuit of the backlight module is facilitated to be optimized.
More specifically, the configurable backlight module 100 includes a first color light emitting unit 111, a second color light emitting unit 112, and a third color light emitting unit 113; in the column direction Y, the first color light emitting unit 111, the second color light emitting unit 112, and the third color light emitting unit 113 are sequentially arranged; the adjacent row of first color light emitting units 111 and the adjacent row of second color light emitting units 112 are insulated, and one side end of the connection circuit of the adjacent row of second color light emitting units 112 and the row of third color light emitting units 113 is electrically connected. Of these, the first color light emitting unit 111 is illustratively a red light emitting unit, the second color light emitting unit 112 is a green light emitting unit, and the third color light emitting unit 113 is a blue light emitting unit.
The connection circuit of the adjacent second color light emitting unit 112 and third color light emitting unit 113 is electrically connected at one side end, which is essentially based on the fact that the voltage difference of the rows where the two color light emitting units exist is the same, that is, the voltage difference of the rows where the second color light emitting unit 112 exists is basically the same as the voltage difference of the rows where the third color light emitting unit 113 exists, and the same end electrode is set, then the independent lighting of the whole row of light emitting units is realized by using the independent electrode at the other end, so that the independent control of the row of light emitting units can be ensured, the connection end of the light emitting units in the backlight module can be saved, driving signals can be saved, the driving signals required by a panel can be reduced, and the design of the driving circuit of the backlight module can be optimized.
In the display device described above, three adjacent rows of light emitting units 110 with different colors form the backlight light emitting units of the same independent control area 210. According to the driving method provided by the embodiment of the invention, when driving is performed on the basis of the structure of the display device, after the pixel units 211 in the independent control area 210 are charged, one row of the three rows of light emitting units 110 can be lightened to complete the display of subframes with one color, and field sequential driving color mixing can be realized through subframes with three different colors, so that the display of pictures is realized.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. The driving method of the display device is characterized in that the display device comprises a backlight module and a display panel, and the display panel is positioned on the light emitting side of the backlight module;
the backlight module comprises a plurality of light-emitting units with various colors;
the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with at least one light-emitting unit with different colors;
the display device includes a plurality of refresh frames during an operation time, each of the refresh frames including a plurality of driving periods;
in any one of the driving periods, the driving method includes:
charging the pixel units in the display panel;
and sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas which are charged by the pixel units.
2. The driving method of a display device according to claim 1, wherein sequentially or synchronously lighting up the light emitting units of one color corresponding to the independent control regions where the pixel unit charging has been completed, comprises:
and after all the pixel units are charged, all the light-emitting units with the same color corresponding to all the independent control areas are uniformly lightened.
3. The method for driving a display device according to claim 2, wherein,
after all the pixel units are charged, all the light emitting units with the same color corresponding to all the independent control areas are uniformly lightened, and the method comprises the following steps:
after all the pixel units are charged, all the light-emitting units with the same color corresponding to all the independent control areas are uniformly lightened, and the first preset duration of the lightening state is maintained; the time length duty ratio of the first preset time length in the driving time period is smaller than or equal to 0.3.
4. The driving method of a display device according to claim 1, wherein the plurality of independent control regions are sequentially arranged in a row direction and a column direction, respectively;
charging the pixel unit in the display panel, comprising:
sequentially charging the pixel units of the plurality of independent control areas along the row direction and/or the column direction;
sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control areas with the completed pixel unit charging, including:
and sequentially lighting the light-emitting units of one color corresponding to the independent control areas of each row of the charged pixel units along the row direction and/or the column direction.
5. The driving method of a display device according to claim 4, wherein sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control regions where the pixel unit charging has been completed, further comprises:
and maintaining the lighting state of the light emitting units corresponding to the independent control areas of each lighted row until the current driving period is ended.
6. The driving method of a display device according to claim 1, wherein the colors of the light emitting units that are lit up for each of the driving periods are different in the same refresh frame.
7. The driving method of the display device according to claim 1, wherein the driving method further comprises:
acquiring a synchronous signal; wherein, in any one of the refresh frames, the synchronization signal includes an active phase and an inactive phase;
charging the pixel unit in the display panel, comprising:
charging the pixel units in the display panel in an active stage of the synchronization signal;
sequentially or synchronously lighting the light emitting units of one color corresponding to the independent control areas with the completed pixel unit charging, including:
and at the effective stage of the synchronous signal, sequentially or synchronously lighting the light-emitting units of one color corresponding to the independent control areas which are charged by the pixel units.
8. A display device for performing the driving method of any one of claims 1 to 7, the display device comprising a backlight module and a display panel, the display panel being located on a light-emitting side of the backlight module;
the backlight module comprises a plurality of light-emitting units with various colors;
the display panel comprises a plurality of independent control areas, wherein each independent control area comprises at least one pixel unit, and each independent control area is correspondingly provided with one light-emitting unit with different colors.
9. The display device according to claim 8, wherein the light emitting units of the same color are arranged in an array in a row direction and a column direction, respectively, and the light emitting units of a plurality of colors are sequentially arranged periodically in the column direction.
10. The display device according to claim 8, wherein the light emitting cells of the same row of the same color are sequentially divided into at least two groups in a row direction, each group of the light emitting cells is sequentially connected in series, and the light emitting cells of different groups are connected in parallel to each other.
11. The display device according to claim 10, wherein the backlight module includes a first color light emitting unit, a second color light emitting unit, and a third color light emitting unit;
in the column direction, the first color light emitting unit, the second color light emitting unit, and the third color light emitting unit are sequentially arranged;
the adjacent row of the first color light emitting units and the adjacent row of the second color light emitting units are insulated, and one side end of a connecting circuit of the adjacent row of the second color light emitting units and the adjacent row of the third color light emitting units is electrically connected.
12. The display device according to claim 11, wherein the first color light emitting unit is a red light emitting unit, the second color light emitting unit is a green light emitting unit, and the third color light emitting unit is a blue light emitting unit.
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