CN109859715B - Display driving method and liquid crystal display device - Google Patents
Display driving method and liquid crystal display device Download PDFInfo
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- CN109859715B CN109859715B CN201910277846.2A CN201910277846A CN109859715B CN 109859715 B CN109859715 B CN 109859715B CN 201910277846 A CN201910277846 A CN 201910277846A CN 109859715 B CN109859715 B CN 109859715B
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Abstract
The embodiment of the invention discloses a display driving method, which comprises the following steps: receiving input image frame data; comparing the input image frame data with data of a plurality of pre-stored gray-scale images to obtain a comparison result; when the comparison result meets a first condition, controlling a first display area and a second display area of a target display screen to adopt different polarity inversion modes and carrying out image display according to the input image frame data; and when the comparison result meets a second condition, controlling the first display area and the second display area of the target display screen to adopt the same polarity inversion mode and display images according to the input image frame data. The embodiment of the invention also provides a liquid crystal display device. The embodiment of the invention can well realize better balance between the flicker phenomenon and the power consumption of the liquid crystal display device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display driving method and a liquid crystal display device.
Background
The problem of image sticking of long-term DC bias is easily generated in the working process of the liquid crystal display, so that the flicker (flicker) phenomenon is likely to occur, and how to solve the problem, namely how to obtain better balance between the flicker phenomenon and the power consumption of the liquid crystal display device, is an important problem which needs to be solved urgently on the premise of ensuring smaller power consumption.
Disclosure of Invention
Therefore, embodiments of the present invention provide a display driving method and a liquid crystal display device, which can well achieve a good balance between a flicker phenomenon and power consumption of the liquid crystal display device.
The invention provides a display driving method, which comprises the following steps: receiving input image frame data; comparing the input image frame data with data of a plurality of pre-stored gray-scale images to obtain a comparison result; when the comparison result meets a first condition, controlling a first display area and a second display area of a target display screen to adopt different polarity inversion modes and carrying out image display according to the input image frame data; and when the comparison result meets a second condition, controlling the first display area and the second display area of the target display screen to adopt the same polarity inversion mode and display images according to the input image frame data.
In one embodiment of the present invention, the gray-scale images are 128 gray-scale images and above.
In an embodiment of the present invention, the first condition is that the input image frame data is different from data of the plurality of grayscale images and the first display area and the second display area respectively adopt a dot inversion method and a column inversion method; the second condition is that the input image frame data is the same as the data of one of the plurality of grayscale images and the first display area and the second display area adopt a column inversion mode.
In an embodiment of the present invention, the first display area is a middle display area of the target display screen, and the second display area is a peripheral display area of the target display screen located on both sides of the middle display area.
In an embodiment of the present invention, the first display area is a middle display area of the target display screen, and the second display area is a peripheral display area of the target display screen located on both sides of the middle display area.
In an embodiment of the present invention, when the comparison result satisfies a first condition, the controlling the first display area and the second display area of the target display screen to perform image display according to the input image frame data by using different polarity inversion methods includes: when the comparison result meets a first condition, two paths of different polarity control signals are output through two paths of polarity control signal lines to control the first display area and the second display area of the target display screen to adopt different polarity inversion modes; when the comparison result meets a second condition, controlling the first display area and the second display area of the target display screen to adopt the same polarity inversion mode and perform image display according to the input image frame data comprises: and when the comparison result meets a second condition, two paths of same polarity control signals are output through the two paths of polarity control signal lines to control the first display area and the second display area of the target display screen to adopt the same polarity inversion mode.
In an embodiment of the present invention, the first condition is that the input image frame data is different from data of the plurality of grayscale images and the first display area and the second display area respectively adopt a dot inversion method and a column inversion method; the second condition is that the input image frame data is the same as the data of one of the plurality of gray-scale images and the first display area and the second display area adopt a column inversion mode; the first display area is a middle display area of the target display screen, and the second display area is a peripheral display area of the target display screen, wherein the peripheral display area is located on two sides of the middle display area.
The present invention also provides a liquid crystal display device including: the display area comprises a middle display area and peripheral display areas positioned on two opposite sides of the middle display area; a plurality of data drivers connected to the middle display region and the peripheral display region of the display regions and configured to drive the middle display region and the peripheral display region for image display according to input image frame data; a memory for storing data of a plurality of grayscale images; a timing controller connected to the memory and the plurality of data drivers and including a first polarity control signal output terminal and a second polarity control signal output terminal; the timing controller is configured to receive the input image frame data, compare the received input image frame data with data of the plurality of grayscale images to obtain a comparison result, and generate different polarity control signals to be transmitted to the plurality of data drivers through the first polarity control signal output terminal and the second polarity control signal output terminal respectively when the comparison result satisfies a first condition, or generate the same polarity control signal to be transmitted to the plurality of data drivers through the first polarity control signal output terminal and the second polarity control signal output terminal respectively when the comparison result satisfies a second condition.
In one embodiment of the invention, the peripheral display regions include a first peripheral display region and a second peripheral display region located on opposite sides of the middle display region, the middle display region including a first half region adjacent the first peripheral display region and a second half region adjacent the second peripheral display region; the plurality of data drivers include a first data driver and a second data driver, the first data driver is connected to the first polarity control signal output terminal and the second polarity control signal output terminal and is used to drive the first peripheral display region and the first half region, and the second data driver is connected to the first polarity control signal output terminal and the second polarity control signal output terminal and is used to drive the second peripheral display region and the second half region.
In an embodiment of the invention, the plurality of data drivers include a first data driver and a second data driver, the first data driver is connected to the first polarity control signal output terminal and is configured to drive the peripheral display region, and the second data driver is connected to the second polarity control signal output terminal and is configured to drive the middle display region.
The invention can have the following advantages or beneficial effects: according to the embodiment of the invention, the input image frame data is compared with the data of the plurality of pre-stored gray scale images, and the same or different polarity inversion modes are adopted for different areas according to the comparison result, so that the flicker phenomenon and the power consumption of the liquid crystal display device can be well balanced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a display driving method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a liquid crystal display device according to another embodiment of the invention;
fig. 4 is a schematic structural diagram of a liquid crystal display device according to another embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a display driving method, including:
s11: receiving input image frame data;
s13: comparing the input image frame data with data of a plurality of pre-stored gray-scale images to obtain a comparison result;
s15: when the comparison result meets a first condition, controlling a first display area and a second display area of a target display screen to adopt different polarity inversion modes and carrying out image display according to the input image frame data;
s17: and when the comparison result meets a second condition, controlling the first display area and the second display area of the target display screen to adopt the same polarity inversion mode and display images according to the input image frame data.
Further, the grayscale images are, for example, grayscale images of 128 and above.
Further, the first condition is that the input image frame data is different from the data of the plurality of grayscale images and the first display area and the second display area respectively adopt a dot inversion method and a column inversion method; the second condition is that the input image frame data is the same as the data of one of the plurality of grayscale images and the first display area and the second display area adopt a column inversion mode, for example.
Further, the first display area is, for example, a middle display area of the target display screen, and the second display area is, for example, a peripheral display area of the target display screen located on both sides of the middle display area.
Specifically, the step S15 includes, for example: when the comparison result meets a first condition, two paths of different polarity control signals are output through two paths of polarity control signal lines to control the first display area and the second display area of the target display screen to adopt different polarity inversion modes;
specifically, the step S17 includes, for example: and when the comparison result meets a second condition, two paths of same polarity control signals are output through the two paths of polarity control signal lines to control the first display area and the second display area of the target display screen to adopt the same polarity inversion mode.
It is worth mentioning here that due to the limitation of the visual angle of human eyes, the visual lines of human eyes are mainly concentrated in the middle display area of the screen, and for the peripheral display areas at the two sides of the screen, the perception of flicker phenomenon by human eyes is not so strong; and the sensitivity of human eyes to flicker phenomenon under different gray scales is also different, and when the screen brightness reaches 128 gray scales or more, the sensitivity of human eyes to flicker phenomenon is reduced. In combination with the above two points, the embodiment of the invention adopts different inversion modes for different areas of the screen under different gray scales so as to achieve the optimal balance between the power consumption and the flicker phenomenon.
In summary, the foregoing embodiments of the present invention compare the input image frame data with the pre-stored data of the plurality of gray-scale images, and apply the same polarity inversion scheme, for example, the column inversion scheme, or different polarity inversion schemes, for example, the dot inversion scheme and the column inversion scheme, to the middle display area and the peripheral display area of the target display screen according to the comparison result, so as to achieve a better balance between the flicker phenomenon and the power consumption of the liquid crystal display device.
As shown in fig. 2, another embodiment of the present invention provides a liquid crystal display device 10, which mainly includes: a display area 11, a plurality of data drivers 13, a timing controller 15, and a memory 17. The display area 11 includes, for example, a middle display area 111 and peripheral display areas 113 located on opposite sides of the middle display area 111; a plurality of data drivers 13 including two or more data drivers (not shown in fig. 2) connecting the middle display region 111 and the peripheral display region 113 of the display region 11 and for driving the middle display region 111 and the peripheral display region 113 for image display according to input image frame data; a timing controller 15 connected to the memory 17 and the plurality of data drivers 13 and including a first polarity control signal output terminal 151 and a second polarity control signal output terminal 153, it being further understood that the timing controller 15 further includes a data output terminal connected to the plurality of data drivers 13 for providing the input image frame data to the data drivers 13; a memory 17 for storing data of a plurality of grayscale images; more specifically, the timing controller 15 is configured to receive the input image frame data, compare the received input image frame data with the data of the plurality of grayscale images to obtain a comparison result, and generate different polarity control signals to be transmitted to the plurality of data drivers 13 through the first polarity control signal output terminal 151 and the second polarity control signal output terminal 153, respectively, when the comparison result satisfies a first condition or generate the same polarity control signal to be transmitted to the plurality of data drivers 13 through the first polarity control signal output terminal 151 and the second polarity control signal output terminal 153, respectively, when the comparison result satisfies a second condition. It should be noted that the memory 17 may be, for example, a memory built in the timing controller 15 or an external memory.
More specifically, the data of the plurality of grayscale images is, for example, grayscale images of 128 and above, the first condition is that the input image frame data is different from the data of the plurality of grayscale images, and the second condition is that the input image frame data is the same as the data of one of the plurality of grayscale images.
When the comparison result meets a first condition, for example, different polarity control signals are generated, and the different polarity control signals include, for example, a first polarity control signal and a second polarity control signal with different polarities. At this time, the first polarity control signal is transmitted to the plurality of data drivers 13 through the first polarity control signal output terminal 151, for example, so as to drive the peripheral display region 113 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the plurality of data drivers 13 through the second polarity control signal output terminal 153, for example, so as to drive the middle display region 111 to perform image display according to the input image frame data in a dot inversion manner.
And generating the same polarity control signal when the comparison result meets a second condition, wherein the same polarity control signal comprises a first polarity control signal and a second polarity control signal with the same polarity. At this time, the first polarity control signal is transmitted to the plurality of data drivers 13 through the first polarity control signal output terminal 151, for example, so as to drive the peripheral display region 113 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the plurality of data drivers 13 through the second polarity control signal output terminal 153, for example, so as to drive the middle display region 111 to perform image display according to the input image frame data in a column inversion manner.
As shown in fig. 3, another embodiment of the present invention provides a liquid crystal display device 20, which mainly includes: a display area 21, a plurality of data drivers 23, a timing controller 25, and a memory 27. The display area 21 includes, for example, a first peripheral display area 215 and a second peripheral display area 217 located on opposite sides of the display area 21, and a first half area 211 and a second half area 213 located between and adjacent to the first peripheral display area 215 and the second peripheral display area 217, the first half area 211 being located adjacent to the first peripheral display area 215, and the second half area 213 being located adjacent to the second peripheral display area 217; the plurality of data drivers 23 include a first data driver 231 and a second data driver 233, the first data driver 231 (the number of which may be one or more) connecting the first peripheral display region 215 and the first half region 211 and driving the first peripheral display region 215 and the first half region 211 for image display according to input image frame data, the second data driver 233 (the number of which may be one or more) connecting the second peripheral display region 217 and the second half region 213 and driving the second peripheral display region 217 and the second half region 213 for image display according to the input image frame data; the timing controller 25 is connected to the memory 27, the first data driver 231 and the second data driver 233 and includes a first polarity control signal output 251 and a second polarity control signal output 253, and it is further understood that the timing controller 25 further includes a data output connected to the first data driver 231 and the second data driver 233 for providing the input image frame data to the first data driver 231 and the second data driver 233; a memory 27 for storing data of a plurality of grayscale images; the first data driver 231 is connected to the first polarity control signal output terminal 251 and the second polarity control signal output terminal 253 and drives the first peripheral display region 215 and the first half region 211, and the second data driver 233 is connected to the first polarity control signal output terminal 251 and the second polarity control signal output terminal 253 and drives the second peripheral display region 217 and the second half region 213. It should be noted that the memory 27 may be, for example, a memory built in the timing controller 25 or an external memory; each of the first data driver 231 and the second data driver 233 is not limited to one data driver, but may include a plurality of data drivers.
More specifically, the timing controller 25 is configured to receive the input image frame data, compare the received input image frame data with the data of the plurality of grayscale images to obtain a comparison result, and generate different polarity control signals to be transmitted to the first and second data drivers 231 and 233 through the first and second polarity control signal output terminals 251 and 253, respectively, when the comparison result satisfies a first condition, or generate the same polarity control signals to be transmitted to the first and second data drivers 231 and 233 through the first and second polarity control signal output terminals 251 and 253, respectively, when the comparison result satisfies a second condition.
More specifically, the data of the plurality of grayscale images is, for example, grayscale images of 128 and above, the first condition is that the input image frame data is different from the data of the plurality of grayscale images, and the second condition is that the input image frame data is the same as the data of one of the plurality of grayscale images.
When the comparison result meets a first condition, for example, different polarity control signals are generated, and the different polarity control signals include, for example, a first polarity control signal and a second polarity control signal with different polarities. At this time, the first polarity control signal is transmitted to the first and second data drivers 231 and 233 through the first polarity control signal output terminal 251, for example, to drive the first and second peripheral display regions 215 and 217 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the first data driver 231 and the second data driver 233 through the second polarity control signal output terminal 253, for example, to drive the first half area 211 and the second half area 213 to perform image display according to the input image frame data in a dot inversion manner.
And generating the same polarity control signal when the comparison result meets a second condition, wherein the same polarity control signal comprises a first polarity control signal and a second polarity control signal with the same polarity. At this time, the first polarity control signal is transmitted to the first and second data drivers 231 and 233 through the first polarity control signal output terminal 251, for example, to drive the first and second peripheral display regions 215 and 217 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the first data driver 231 and the second data driver 233 through the second polarity control signal output terminal 253, for example, to drive the first half area 211 and the second half area 213 to perform image display according to the input image frame data in a column inversion manner.
As shown in fig. 4, another embodiment of the present invention provides a liquid crystal display device 30, which mainly includes: a display area 31, a plurality of data drivers 33, a timing controller 35, and a memory 37. Among them, the display region 31 includes, for example, a middle display region 311 and first and second peripheral display regions 313 and 315 located on opposite sides of the middle display region 311; the plurality of data drivers 33 include a first data driver 331 and a second data driver 333, the first data driver 331 (the number of which may be one or more) connecting the first peripheral display region 313 and the second peripheral display region 315 and driving the first peripheral display region 313 and the second peripheral display region 315 for image display according to input image frame data; a second data driver 333 (the number of which may be one or more) connected to the intermediate display region 311 and configured to drive the intermediate display region 311 for image display according to the input image frame data; the timing controller 35 is connected to the memory 37, the first data driver 331 and the second data driver 333 and includes a first polarity control signal output terminal 351 and a second polarity control signal output terminal 353, and it is further understood that the timing controller 35 further includes a data output terminal connected to the first data driver 331 and the second data driver 333 for supplying the input image frame data to the first data driver 331 and the second data driver 333; a memory 37 for storing data of a plurality of grayscale images; the first data driver 331 is connected to the first polarity control signal output terminal 351 and is used for driving the first peripheral display region 313 and the second peripheral display region 315, and the second data driver 333 is connected to the second polarity control signal output terminal 353 and is used for driving the middle display region 311. It should be noted that the memory 37 may be, for example, a memory built in the timing controller 35 or an external memory; each of the first data driver 331 and the second data driver 333 is not limited to one data driver, but may include a plurality of data drivers.
More specifically, the timing controller 35 is configured to receive the input image frame data, compare the received input image frame data with the data of the plurality of grayscale images to obtain a comparison result, and generate different polarity control signals to be transmitted to the first and second data drivers 331 and 333 through the first and second polarity control signal output terminals 351 and 353, respectively, when the comparison result satisfies a first condition, or generate the same polarity control signals to be transmitted to the first and second data drivers 331 and 333 through the first and second polarity control signal output terminals 351 and 353, respectively, when the comparison result satisfies a second condition.
More specifically, the data of the plurality of grayscale images is, for example, grayscale images of 128 and above, the first condition is that the input image frame data is different from the data of the plurality of grayscale images, and the second condition is that the input image frame data is the same as the data of one of the plurality of grayscale images.
When the comparison result meets a first condition, for example, different polarity control signals are generated, and the different polarity control signals include, for example, a first polarity control signal and a second polarity control signal with different polarities. At this time, the first polarity control signal is transmitted to the first data driver 331 through the first polarity control signal output terminal 351, for example, to drive the first peripheral display region 313 and the second peripheral display region 315 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the second data driver 333 through the second polarity control signal output terminal 353, for example, so as to drive the middle display region 311 to perform image display according to the input image frame data in a dot inversion manner.
And generating the same polarity control signal when the comparison result meets a second condition, wherein the same polarity control signal comprises a first polarity control signal and a second polarity control signal with the same polarity. At this time, the first polarity control signal is transmitted to the first data driver 331 through the first polarity control signal output terminal 351, for example, to drive the first peripheral display region 313 and the second peripheral display region 315 to perform image display according to the input image frame data in a column inversion manner. The second polarity control signal is transmitted to the second data driver 333 through the second polarity control signal output terminal 353, for example, so as to drive the middle display region 311 to perform image display according to the input image frame data in a column inversion manner.
In summary, the foregoing embodiments of the present invention divide the display area into the middle display area and the peripheral display area, compare the received input image frame data with the data of the plurality of gray-scale images stored in the memory through the timing controller, and send the same polarity control signal or different polarity control signals to the data driver through the first polarity control signal output terminal and the second polarity control signal output terminal according to the comparison result to control the middle display area and the peripheral display area to perform image display according to the input image frame data in the same polarity inversion manner or different polarity inversion manner, thereby achieving a better balance between the flicker phenomenon and the power consumption of the liquid crystal display device.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A display driving method, comprising:
receiving input image frame data;
comparing the input image frame data with data of a plurality of pre-stored gray-scale images to obtain a comparison result;
when the comparison result meets a first condition, two paths of control signals with different polarities are output through two paths of polarity control signal lines to control a first display area and a second display area of a target display screen to adopt different polarity inversion modes and carry out image display according to the input image frame data;
when the comparison result meets a second condition, two paths of same-polarity control signals are output through the two paths of polarity control signal lines to control the first display area and the second display area of the target display screen to adopt the same polarity inversion mode and display images according to the input image frame data;
the gray-scale images are 128 gray-scale images or more, the first condition is that the data of the input image frame data is different from the data of the gray-scale images, and the second condition is that the data of the input image frame data is the same as the data of one of the gray-scale images.
2. The display driving method according to claim 1, wherein the first display region is a middle display region of the target display screen, and the second display region is peripheral display regions of the target display screen located on both sides of the middle display region.
3. A liquid crystal display device, comprising:
the display area comprises a middle display area and peripheral display areas positioned on two opposite sides of the middle display area;
a plurality of data drivers connected to the middle display region and the peripheral display region of the display regions and configured to drive the middle display region and the peripheral display region for image display according to input image frame data;
a memory for storing data of a plurality of grayscale images;
a timing controller connected to the memory and the plurality of data drivers and including a first polarity control signal output terminal and a second polarity control signal output terminal;
the timing controller is configured to receive the input image frame data, compare the received input image frame data with data of the plurality of grayscale images to obtain a comparison result, and generate different polarity control signals to be transmitted to the plurality of data drivers through the first polarity control signal output terminal and the second polarity control signal output terminal respectively when the comparison result satisfies a first condition, or generate the same polarity control signal to be transmitted to the plurality of data drivers through the first polarity control signal output terminal and the second polarity control signal output terminal respectively when the comparison result satisfies a second condition;
the gray-scale images are 128 gray-scale images or more, the first condition is that the data of the input image frame data is different from the data of the gray-scale images, and the second condition is that the data of the input image frame data is the same as the data of one of the gray-scale images.
4. The liquid crystal display device according to claim 3, wherein the peripheral display region includes a first peripheral display region and a second peripheral display region located on opposite sides of the middle display region, the middle display region including a first half region adjacent to the first peripheral display region and a second half region adjacent to the second peripheral display region; the plurality of data drivers include a first data driver and a second data driver, the first data driver is connected to the first polarity control signal output terminal and the second polarity control signal output terminal and is used to drive the first peripheral display region and the first half region, and the second data driver is connected to the first polarity control signal output terminal and the second polarity control signal output terminal and is used to drive the second peripheral display region and the second half region.
5. The liquid crystal display device as claimed in claim 3, wherein the plurality of data drivers include a first data driver connected to the first polarity control signal output terminal and used to drive the peripheral display region, and a second data driver connected to the second polarity control signal output terminal and used to drive the middle display region.
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