The present application is the National Stage of International Application No. PCT/CN2019/076177, filed on Feb. 26, 2019, which claims the benefit of Chinese patent application filed in the National Intellectual Property Administration on Jan. 30, 2019, with the application No. 201910096420.7 and title “Driving method and device of display panel, and display apparatus”, the entire contents of which are hereby incorporated by reference.
The present application relates to the technical field of liquid crystal display, in particular to a driving method and device of a display panel, and a display apparatus.
Most current large-size liquid crystal display panels are made from vertical alignment (VA) liquid crystals or In-Plane Switching (IPS) liquid crystals.
Comparing VA liquid crystal technology with IPS liquid crystal technology, it can be found that VA liquid crystal technology has a higher production efficiency and a lower manufacturing cost, but it is inferior to IPS liquid crystal technology on optical properties and has obvious defects on optical properties.
Especially when applied to large-sized display panels, see
In order to improve the color shift of the VA liquid crystal, a general solution is to further divide the sub-pixels into primary pixel and secondary pixel. See
However, this way of dividing the primary pixel from the secondary pixels will solve the color shift problem by giving different driving voltages respectively to the primary and secondary pixels in space, thus resulting in need to redesign the metal trace or thin film transistor (TFT) components to drive the secondary pixels when designing the pixel. This will brings about sacrifice of the photic aperture opening and thus affect the panel transmittance.
Therefore, it has to be discussed that the current color shift solution cannot improve the color shift perfectly as the panel transmittance would be influenced.
The previously mentioned content is only used to assist in understanding the technical solution of the present application, and does not admit that the above content is prior art.
The main purpose of the present application is to provide a driving method, a driving device and a driving device for a display panel, aiming to effectively improve the color shift phenomenon without affecting the panel transmittance.
In order to achieve the aforementioned objectives, the present application provides a driving method of a display panel, which includes a display array including pixel unit defined in an array. The pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel in a first direction, and the first sub-pixel, the second sub-pixel and the third sub-pixel of the pixel unit are respectively aligned in the first direction according to an array order. The driving method of the display panel includes the following steps:
taking two adjacent sub-pixels in a second direction scanned as a data driving period; sequentially driving the two adjacent sub-pixels respectively through the data driving signal in the second direction during the data driving period, when a data driving signal input by a data driving circuit is received; and
driving positively a first adjacent sub-pixel of the two adjacent sub-pixels in a first time interval and driving negatively a second adjacent sub-pixel of the two adjacent sub-pixels in a second time interval. The first time interval is different from the second time interval.
Additionally, in order to achieve the aforementioned objective, the present application also provides a driving device for a display panel, the display panel includes a display array. The display array includes a pixel unit arranged in an array. The pixel unit includes a first sub-pixel, a second sub-pixel and a third sub-pixel in a first direction. And the first sub-pixel, the second sub-pixel and the third sub-pixel of the pixel unit are respectively aligned in the first direction according to an array order. The driving device of the display panel includes:
a driving module, configured to take two adjacent sub-pixels in a second direction scanned as a data driving period, and to sequentially drive the two adjacent sub-pixels respectively through the data driving signal in the second direction during the data driving period, when a data driving signal input by a data driving circuit is received. And
the driving module is further configured to drive positively a first adjacent sub-pixel of the two adjacent sub-pixels in a first time interval and to drive negatively a second adjacent sub-pixel of the two adjacent sub-pixels in a second time interval. The first time interval is different from the second time interval.
Additionally, in order to achieve the aforementioned objective, the present application also provides a display apparatus, wherein the display apparatus comprises a display panel, a memory, a non-volatile memory, and a processor; the non-volatile memory stores executable instructions, and the processor executes the executable instructions,
In the present application, in order to effectively avoid the color shift without redesigning, the metal wiring or TFT components, data driving signals with different positive driving duration and negative driving duration are input in the column direction to drive the pixel unit. Since the positive driving duration and negative driving duration are different, the duration for charging the pixel unit is directly controlled. And when the charging duration is different, the charging capability will be different, forming an alternative alignment of the high-voltage pixel unit and the low-voltage pixel unit, and further improving the color shift. Therefore, it would be discussed that the color shift has been successfully improved in the present application without affecting the transmittance of the panel.
The implementation, functional features and advantages of the purpose of the present application will be further described herein with reference to the accompanying drawings combined with the exemplary embodiments.
It should be understood that the specific embodiments described herein are only for the purpose of explaining the present application and are not intended for limitation.
Referring to
As shown in
Those skilled in the art will understand that the display device structure shown in
As shown in
In the display device shown in
Based on the above hardware structure, the display panel 1004 includes a display array which includes pixel units arranged in an array, some exemplary embodiments of the driving method of the display panel of the present application is provided herein.
Referring to
Referring to
In order to control the charging time of the scan driving signal relative to the data driving signal, the data driving time of the positive sub-pixels VGd_1, VGd_3 and VGd_5 is long and the data driving time of the negative sub-pixels VGd_2, VGd_4 and VGd_6 is short. Thus, the equivalent charging voltages of the negative secondary pixels VGd_2, VGd_4 and VGd_6 decreases, forming a so-called low voltage sub-pixel, and the equivalent charging voltages of the positive secondary pixels VGd_1, VGd_3 and VGd_5 maintain the original charging signal to form a so-called high voltage sub-pixel.
A difference in charging between the high-voltage secondary pixels and the low-voltage secondary pixels can be achieved by means of forming a row of secondary pixels interspersed with the long and short data driving durations rather than the same original data driving duration, thereby improving the color shift.
Referring to
The display array can be seen in
In some exemplary embodiments, the driving method of the display panel includes the following steps:
Step S10: taking two adjacent sub-pixels in a second direction scanned as a data driving period; sequentially driving the two adjacent sub-pixels respectively through the data driving signal in the second direction during the data driving period, when a data driving signal input by a data driving circuit is received.
Specifically, some exemplary embodiments can be implemented based on the display array shown in
Step S20: driving positively a first adjacent sub-pixel of the two adjacent sub-pixels in a first time interval and driving negatively a second adjacent sub-pixel of the two adjacent sub-pixels in a second time interval, where the first time interval is different from the second time interval.
It can be understood that, since the scan driving signal is used to control the turning on and off of the pixel unit, and the data driving signal is used to charge the pixel unit. Of course, it is the premise that the scan driving signal has controlled the pixel unit to turn on, to ensure the data driving signal be able charge. Therefore, when the scan driving signal of the sub-pixels in the column direction are the same, the first sub-pixel and the second sub-pixel in the column direction can be given with different charging capabilities by directly controlling the charging time of the pixel unit by the data driving signals.
In some exemplary embodiments, referring to
In some exemplary embodiments, in order to effectively avoid the color shift without redesigning metal traces or TFT components, data driving signals with different positive driving duration and negative driving duration are input in the column direction to drive the pixel unit. Since the positive driving duration and negative driving duration are different, the charging duration for the pixel unit is directly controlled. The difference in charging duration, thus makes the charging capability different, forming a high-voltage pixel unit and a low-voltage pixel unit which are arranged alternately, thus improving the color shift. Therefore, it can be considered that some exemplary embodiments successfully improve the color shift without affecting the panel transmittance.
Further, before driving positively a first adjacent sub-pixel of the two adjacent sub-pixels in a first time interval and driving negatively a second adjacent sub-pixel of the two adjacent sub-pixels in a second time interval, the method further includes:
driving a sub-pixel in the second direction by a scan driving signal in a scan driving period, when each scan driving signal input by the scan driving circuit is received, wherein, a duration of the data driving period is equal to the duration of two sequential scan driving period.
In some specific exemplary embodiments, as shown in
Additionally, a scan driving period can be recorded as 1dataT, so the duration of data-driven period is 2*dataT.
Further, the data driving period includes a first scan driving period and a second scan driving period, and the duration of the first scan driving period is equal to that of the second scan driving period.
After driving a sub-pixel in the second direction by a scan driving signal in a scan driving period, when each scan driving signal input by the scan driving circuit is received, the method further includes:
positively driving the first adjacent sub-pixel by a first preset voltage in a positive driving duration, when the first adjacent sub-pixel is driven by the scan driving signal in the first scan driving period, wherein, the positive driving duration is a duration occupied by the first preset voltage within the data driving period, and the positive driving duration is greater than the first scan driving period; and
negatively driving the second adjacent sub-pixel by a second preset voltage in a negative driving duration, when the second adjacent sub-pixel is driven by the scan driving signal in the second scan driving period, wherein, the negative driving duration is a duration occupied by the second preset voltage within the data driving period, the positive driving duration is greater than the negative driving duration, the negative driving duration is less than the second scan driving period and greater than the time difference between the second scan driving period and a scan conducting duration, and the scan conducting duration is a duration when conduction is performed to the sub-pixel in the second direction within the scan driving period.
In some specific exemplary embodiments, as shown in
In order to facilitate the understanding of the driving principle of data driving signals for sub-pixel, two continuous scan driving period can be expressed, i.e., two continuous dataT durations are taken as an example. If
It should be understood that, it is precisely because of the second dataT of the scan driving signal, the voltage of the data driving signal jumps. Therefore, in the second dataT of the scan driving signal, the voltage jump point of the data driving signal will be included in the pulse width T1 in this time period. So the negative driving duration will be less than T1, which can be recorded as T1′. The first time interval is T1 and the second time interval is T1′.
It can be understood that it is precisely because the driving duration of positive driving is actually T1 and the driving duration of negative driving is actually T1′ and T1 is greater than T1′, that the charging difference is achieved between the of high-voltage sub-pixels and the of low-voltage sub-pixels. The first sub-pixel with the driving duration of T1 can be regarded as a high-voltage sub-pixel, and the second sub-pixel with the driving duration of T′ can be regarded as a low-voltage sub-pixel, thereby achieving improvement in color shift.
Further, each of adjacent sub-pixels in the pixel unit is alternately arranged with high and low voltages.
In some exemplary embodiments, polarity inversion can be performed based on dot inversion. For example, referring to
Further, the first sub-pixel, the second sub-pixel and the third sub-pixel may respectively be a red sub-pixel, a green sub-pixel and a blue sub-pixel.
In some exemplary embodiments, referring to
Further, after taking two adjacent sub-pixels in a second direction scanned as a data driving period; sequentially driving the two adjacent sub-pixels respectively through the data driving signal in the second direction during the data driving period, when a data driving signal input by a data driving circuit is received, the method further includes:
negatively driving the first adjacent sub-pixel in a third time interval and positively driving the second adjacent sub-pixel in a fourth time interval, when the first adjacent sub-pixel and the second adjacent sub-pixel in the data driving period are sequentially conducted, where the third time interval is the same as the second time interval, and the fourth time interval is the same as the first time interval.
In some exemplary embodiments, in addition to
It can be understood that the sub-pixels in the column direction are sequentially negative sub-pixels VGd_1, positive sub-pixels VGd_2, negative sub-pixels VGd_3, positive sub-pixels VGd_4, negative sub-pixels VGd_5, and positive sub-pixels VGd_6. The data driving timing of the corresponding secondary pixels is T−Δt, T+Δt, T−Δt, T+Δt, T−Δt, and T+Δt, making the data driving signals of each sub-pixels relative to the gate switch charging duration being T1′, T1, T1′, T1, T1′, and T1. In such way, sub-pixels with different frame timing and different high and low voltage signals can be implemented, and the difference between high voltage sub-pixels and low voltage sub-pixels will not be visible for the naked eye, and there will be no defect of resolution reduction.
Additionally, the embodiment of the present application also provides a driving device for the display panel. As shown in
a driving module 200, configured to take two adjacent sub-pixels in a second direction scanned as a data driving period, and to sequentially drive the two adjacent sub-pixels respectively through the data driving signal in the second direction during the data driving period, when a data driving signal input by a data driving circuit is received. And the driving module 200 is further configured to drive positively a first adjacent sub-pixel of the two adjacent sub-pixels in a first time interval and to drive negatively a second adjacent sub-pixel of the two adjacent sub-pixels in a second time interval, where the first time interval is different from the second time interval.
As shown in
The driving module 200 can refer to the aforementioned exemplary embodiments. After processing, data driving signals with different positive driving duration and negative driving duration are input in the second direction to drive the pixel unit. Since the positive driving duration and the negative driving duration are different, the charging duration for the pixel unit will be directly controlled, and the charging capability will be different, thus forming a high-voltage pixel unit and a low-voltage pixel unit arranged alternately, thus further improving the color shift. Therefore, it can be considered that the color shift has been successfully improved without affecting the transmittance of the panel.
In addition, the exemplary embodiment of the present application also provides a storage medium on which the driver of the display panel is stored, and the driver of the display panel is executed by the processor to perform the steps of the driving method of the display panel as described above.
It should be noted that in this document, the terms “comprise” “include” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that includes a series of components includes not only those components but also other components not expressly listed, or components inherent to such process, method, article, or system. Without further limitation, the element defined by the statement “include one” does not exclude the existence of another identical element in the process, method, article or system that includes the element.
The aforementioned serial numbers of the exemplary embodiments of the present application are for the purpose of description only and do not represent the superiority or inferiority of the exemplary embodiments.
From the description of the above exemplary embodiments, it will be clear to those skilled in the art that the method of the aforementioned exemplary embodiments can be implemented by means of software plus necessary general-purpose hardware platform, although it can also be implemented by hardware, but in many cases the former is a better exemplary embodiment. Based on this understanding, the technical solution of the present application, in nature or part of the contribution to the prior art, can be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, diskette, CD and etc.) as described above, including several instructions to cause a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various exemplary embodiments of the present application.
The above is only the preferred exemplary embodiments of the present application, and is not therefore limiting the scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the protection scope of the present application.
Number | Date | Country | Kind |
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201910096420.7 | Jan 2019 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2019/076177 | 2/26/2019 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2020/155257 | 8/6/2020 | WO | A |
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