CN109859667B - Display control method and device of display equipment and display equipment - Google Patents
Display control method and device of display equipment and display equipment Download PDFInfo
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Abstract
The invention provides a display control method and device of display equipment and the display equipment, and belongs to the technical field of display. The display control method of the display device comprises the following steps of: and in the data voltage writing time period, inputting a changed common voltage to a common electrode line of the display device, so that a first difference value between an actual voltage of a pixel electrode of the display device and the common voltage is within a preset range. By the technical scheme, the influence of the screen flashing phenomenon can be reduced, and the display effect of the display equipment is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display control method and apparatus for a display device, and a display device.
Background
Low refresh frequency display products, such as electronic tags and wearable watches, adopt a method of ultra-low refresh frequency (such as refresh frequency 1Hz) to reduce the overall standby power consumption due to the low power consumption design in the standby state. Because a Feed Through phenomenon exists in a data voltage standby state and no Feed Through phenomenon exists in a data voltage writing stage, and a low refresh frequency display product occupies a long time in the data voltage writing stage, a phenomenon of 'screen flashing' appears when a grid line is opened line by line, and the display effect of the display product is influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a display control method and device of a display device and the display device, which can reduce the influence of a screen flashing phenomenon and improve the display effect of the display device.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, there is provided a display control method of a display apparatus, a display time of one frame of a display screen of the display apparatus including a data voltage writing period and a data voltage maintaining period, the display control method comprising:
and in the data voltage writing time period, inputting a changed common voltage to a common electrode line of the display device, so that a first difference value between an actual voltage of a pixel electrode of the display device and the common voltage is within a preset range.
Further, the inputting of the varied common voltage to the common electrode line of the display device includes:
and carrying out multi-step boosting on the input common voltage.
Further, still include:
and in the data voltage maintaining time period, inputting a constant common voltage to the common electrode line, so that the absolute value of the difference between the first difference and the second difference between the actual voltage of the pixel electrode of the display device and the common voltage is not more than a threshold value.
Further, the refresh frequency of the display device is below a threshold.
An embodiment of the present invention further provides a display control apparatus for a display device, where a display time of a frame of a display screen of the display device includes a data voltage writing time period and a data voltage maintaining time period, the display control apparatus includes:
and the common voltage input module is used for inputting the changed common voltage to a common electrode line of the display equipment in the data voltage writing time period so that a first difference value between the actual voltage of the pixel electrode of the display equipment and the common voltage is in a preset range.
Further, the common voltage input module includes:
and the boosting circuit is used for boosting the input common voltage in multiple stages.
Further, the common voltage input module is further configured to input a constant common voltage to the common electrode line in the data voltage maintaining time period, so that an absolute value of a difference between a second difference between an actual voltage of the pixel electrode of the display device and the common voltage and the first difference is not greater than a threshold.
Further, the refresh frequency of the display device is below a threshold.
The embodiment of the invention also provides display equipment, which comprises the display control device of the display equipment.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the display control method of the display device are implemented as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, in the data voltage writing time period, the changed common voltage is input to the common electrode line of the display device, so that the difference value between the actual voltage of the pixel electrode of the display device and the common voltage is within the preset range, and the difference between the actual voltage of the pixel electrode and the common voltage in the data voltage writing time period is reduced, thereby reducing the probability that the flicker phenomenon is recognized by human eyes, and particularly for the display device with low refresh frequency, the display effect of the display device can be remarkably improved.
Drawings
FIG. 1 is a schematic diagram illustrating the occurrence of a feed-through effect during a data voltage sustain period;
FIG. 2 is a schematic diagram of the common voltage before adjustment;
FIG. 3 is a schematic diagram of the regulated common voltage;
FIG. 4 is a diagram illustrating an input electrical signal according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The display time of one frame of display screen of the display device includes a data voltage writing time period and a data voltage maintaining time period, as shown in fig. 1, when the refresh frequency of the display device is low, such as 1Hz, the data voltage writing time period will take a longer time, such as 250ms, and the data voltage maintaining time period takes 750 ms. In the data voltage maintaining time period, the voltage input on the gate line changes, and due to the influence of parasitic capacitance, the voltage on the gate line can influence the voltage on the pixel electrode, so that the actual voltage on the pixel electrode is lower than the voltage input on the data line, namely, the feed-through effect, but the feed-through effect does not exist in the data voltage writing time period. As shown in fig. 1, in the data voltage writing time period, the voltage difference between the common voltage and the actual voltage on the pixel electrode is inconsistent, so that in the data voltage writing time period, there is an obvious phenomenon that the gate is turned on to write data and flash the screen.
In order to solve the problem that the display effect of the display device is affected because the flicker phenomenon is easily observed by naked eyes due to the fact that the voltage difference between the common voltage and the actual voltage on the pixel electrode is inconsistent in the data voltage writing time period, embodiments of the present invention provide a display control method and apparatus for a display device, and a display device, which can reduce the influence of the flicker phenomenon and improve the display effect of the display device.
An embodiment of the present invention provides a display control method for a display device, where a display time of a frame of a display screen of the display device includes a data voltage writing time period and a data voltage maintaining time period, the display control method including:
and in the data voltage writing time period, inputting a changed common voltage to a common electrode line of the display device, so that a first difference value between an actual voltage of a pixel electrode of the display device and the common voltage is within a preset range.
In the embodiment, in the data voltage writing time period, the changed common voltage is input to the common electrode line of the display device, so that the difference value between the actual voltage of the pixel electrode of the display device and the common voltage is within the preset range, and the difference between the actual voltage of the pixel electrode and the common voltage in the data voltage writing time period is reduced, thereby reducing the probability that the flicker phenomenon is recognized by human eyes, and particularly for the display device with low refresh frequency, the display effect of the display device can be obviously improved.
Further, the inputting of the varied common voltage to the common electrode line of the display device includes:
and carrying out multi-step boosting on the input common voltage.
Taking a display device with a refresh frequency of 1Hz as an example, fig. 2 is a schematic diagram before adjusting the common voltage, as shown in fig. 2, a data voltage writing time period occupies 250ms, a data voltage maintaining time period occupies 750ms, and in the data voltage writing time period, the voltage on the pixel electrode gradually increases; in the data voltage maintaining period, the voltage on the pixel electrode remains unchanged, and in the prior art, the common voltage input to the common electrode line is a constant value, which results in that the difference between the voltage on the pixel electrode and the common voltage is not uniform in the data voltage writing period.
Fig. 3 is a schematic diagram of an adjusted common voltage in this embodiment, and fig. 4 is a schematic diagram of an input electrical signal in this embodiment, as shown in fig. 3 and fig. 4, in this embodiment, in a data voltage writing time period, an input common voltage is boosted in multiple stages, and a boosting curve of the common voltage is matched with a voltage curve on a pixel electrode, so that a difference between an actual voltage of the pixel electrode and the common voltage is within a preset range, for example, a difference between the actual voltage of the pixel electrode and the common voltage is within a range of (a-a, a + a), and specifically, a value may be less than 0.1. According to the technical scheme of the embodiment, the voltage difference between the actual voltage of the pixel electrode and the common voltage in the data voltage writing time period is reduced, so that the probability that the screen flashing phenomenon is recognized by human eyes is reduced, and particularly for the display equipment with low refreshing frequency, the display effect of the display equipment can be obviously improved.
In the data voltage writing time period, the public voltage can be boosted through the booster circuit, a multi-level Boost circuit architecture can be adopted for the design of the booster circuit, and the voltage value can be adjusted. Meanwhile, the matched clock control is input to determine the timing position of each-stage common voltage during boosting. Since the multi-stage boosting circuit is added to the common voltage in this embodiment, power consumption of the display device is increased. In order to meet the design of low power consumption, the number of voltage steps can be reduced according to actual needs, and specific values can be adjusted according to different voltage steps according to the actual voltage on the pixel electrode.
In practical use, different values of the step-up voltage and the duty ratio can be set according to different refresh frequencies (such as 5Hz,1Hz, and 0.25Hz …) of the display device and application scenarios of the display device, so as to find a suitable common voltage curve, reduce the influence of the splash screen phenomenon, and improve the display effect of the display device.
Further, as shown in fig. 4, due to the feed-through effect, during the data voltage maintaining period, the actual voltage of the pixel electrode is smaller than the voltage on the data line, and the voltage difference between the actual voltage of the pixel electrode and the voltage on the data line is d, in order to reduce the voltage difference between the actual voltage of the pixel electrode and the common voltage during the data voltage writing period and the data voltage maintaining period, the method of this embodiment further includes:
and in the data voltage maintaining time period, inputting a constant common voltage to the common electrode line, so that the absolute value of the difference between the first difference and the second difference between the actual voltage of the pixel electrode of the display device and the common voltage is not more than a threshold value.
As shown in fig. 4, in the data voltage maintaining period, the common voltage input to the common electrode line in the present embodiment is lower than the common voltage input to the common electrode line before, so that the difference between the actual voltage of the pixel electrode of the display device and the common voltage can be controlled within a preset range within the display time of one frame of the display screen. It is noted that the actual voltage of the pixel electrode is applied to the pixel electrode of each sub-pixel.
Further, the refresh frequency of the display device is lower than a threshold, for example, lower than 30Hz, that is, the display device of this embodiment is a display device with a low refresh frequency, and because the display device with a low refresh frequency is prone to a phenomenon of "screen splash", by applying the technical scheme of this embodiment, the influence of the screen splash phenomenon can be reduced, and the display effect of the display device can be improved.
As shown in fig. 4, in a Gate start-up stage (250ms), i.e., a data voltage writing stage, different Boost circuits (including a charge pump or a Boost circuit) are connected through timing control, so as to achieve the purpose of multi-stage boosting of the common voltage. Fig. 2 is a schematic diagram before adjusting the common voltage, and in the data voltage writing stage, the brightness is not uniform due to the difference between the common voltage and the voltage on the pixel electrode, resulting in a flicker. Fig. 3 is a schematic diagram of the regulated common voltage, and after the common voltage is boosted in multiple stages, the difference between the relative voltage difference in the data voltage maintaining stage and the data voltage writing stage is reduced, and the probability of identifying the flash screen by naked eyes is reduced.
An embodiment of the present invention further provides a display control apparatus for a display device, where a display time of a frame of a display screen of the display device includes a data voltage writing time period and a data voltage maintaining time period, the display control apparatus includes:
and the common voltage input module is used for inputting the changed common voltage to a common electrode line of the display equipment in the data voltage writing time period so that a first difference value between the actual voltage of the pixel electrode of the display equipment and the common voltage is in a preset range.
In the embodiment, in the data voltage writing time period, the changed common voltage is input to the common electrode line of the display device, so that the difference value between the actual voltage of the pixel electrode of the display device and the common voltage is within the preset range, and the difference between the actual voltage of the pixel electrode and the common voltage in the data voltage writing time period is reduced, thereby reducing the probability that the flicker phenomenon is recognized by human eyes, and particularly for the display device with low refresh frequency, the display effect of the display device can be obviously improved.
Further, the common voltage input module includes:
and the boosting circuit is used for boosting the input common voltage in multiple stages.
Taking a display device with a refresh frequency of 1Hz as an example, fig. 2 is a schematic diagram before adjusting the common voltage, as shown in fig. 2, a data voltage writing time period occupies 250ms, a data voltage maintaining time period occupies 750ms, and in the data voltage writing time period, the voltage on the pixel electrode gradually increases; in the data voltage maintaining period, the voltage on the pixel electrode remains unchanged, and in the prior art, the common voltage input to the common electrode line is a constant value, which results in that the difference between the voltage on the pixel electrode and the common voltage is not uniform in the data voltage writing period.
Fig. 3 is a schematic diagram of an adjusted common voltage in this embodiment, and fig. 4 is a schematic diagram of an input electrical signal in this embodiment, as shown in fig. 3 and fig. 4, in this embodiment, in a data voltage writing time period, an input common voltage is boosted in multiple stages, and a boosting curve of the common voltage is matched with a voltage curve on a pixel electrode, so that a difference between an actual voltage of the pixel electrode and the common voltage is within a preset range, for example, a difference between the actual voltage of the pixel electrode and the common voltage is within a range of (a-a, a + a), and specifically, a value may be less than 0.1. According to the technical scheme of the embodiment, the voltage difference between the actual voltage of the pixel electrode and the common voltage in the data voltage writing time period is reduced, so that the probability that the screen flashing phenomenon is recognized by human eyes is reduced, and particularly for the display equipment with low refreshing frequency, the display effect of the display equipment can be obviously improved.
In the data voltage writing time period, the public voltage can be boosted through the booster circuit, a multi-level Boost circuit architecture can be adopted for the design of the booster circuit, and the voltage value can be adjusted. Meanwhile, the matched clock control is input to determine the timing position of each-stage common voltage during boosting. Since the multi-stage boosting circuit is added to the common voltage in this embodiment, power consumption of the display device is increased. In order to meet the design of low power consumption, the number of voltage steps can be reduced according to actual needs, and specific values can be adjusted according to different voltage steps according to the actual voltage on the pixel electrode.
In practical use, different values of the step-up voltage and the duty ratio can be set according to different refresh frequencies (such as 5Hz,1Hz, and 0.25Hz …) of the display device and application scenarios of the display device, so as to find a suitable common voltage curve, reduce the influence of the splash screen phenomenon, and improve the display effect of the display device.
Further, as shown in fig. 4, due to the feed-through effect, in the data voltage maintaining time period, the actual voltage of the pixel electrode is smaller than the voltage on the data line, the voltage difference between the actual voltage of the pixel electrode and the voltage on the data line is d, and in order to reduce the difference between the actual voltage of the pixel electrode and the voltage on the common electrode in the data voltage writing time period and the data voltage maintaining phase, the common voltage input module is further configured to input a constant common voltage to the common electrode line in the data voltage maintaining time period, so that the absolute value of the difference between the first difference and the second difference between the actual voltage of the pixel electrode of the display device and the common voltage is not greater than the threshold.
As shown in fig. 4, in the data voltage maintaining period, the common voltage input to the common electrode line in the present embodiment is lower than the common voltage input to the common electrode line before, so that the difference between the actual voltage of the pixel electrode of the display device and the common voltage can be controlled within a preset range within the display time of one frame of the display screen. It is noted that the actual voltage of the pixel electrode is applied to the pixel electrode of each sub-pixel.
Further, the refresh frequency of the display device is lower than a threshold, for example, lower than 30Hz, that is, the display device of this embodiment is a display device with a low refresh frequency, and because the display device with a low refresh frequency is prone to a phenomenon of "screen splash", by applying the technical scheme of this embodiment, the influence of the screen splash phenomenon can be reduced, and the display effect of the display device can be improved.
As shown in fig. 4, in a Gate start-up stage (250ms), i.e., a data voltage writing stage, different Boost circuits (including a charge pump or a Boost circuit) are connected through timing control, so as to achieve the purpose of multi-stage boosting of the common voltage. Fig. 2 is a schematic diagram before adjusting the common voltage, and in the data voltage writing stage, the brightness is not uniform due to the difference between the common voltage and the voltage on the pixel electrode, resulting in a flicker. Fig. 3 is a schematic diagram of the regulated common voltage, and after the common voltage is boosted in multiple stages, the difference between the relative voltage difference in the data voltage maintaining stage and the data voltage writing stage is reduced, and the probability of identifying the flash screen by naked eyes is reduced.
The embodiment of the invention also provides display equipment, which comprises the display control device of the display equipment. The display device may be: any product or component with a display function, such as an electronic tag, a digital photo frame, a mobile phone, a tablet computer, and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board, and a back plate.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the display control method of the display device are implemented as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the disclosed embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the disclosed embodiments may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
Embodiments of the present disclosure are described with reference to flowchart illustrations and/or block diagrams of methods, user equipment (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the disclosed embodiments have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the disclosure.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or user equipment that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or user equipment. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or user equipment that comprises the element.
While the foregoing is directed to the preferred embodiment of the present disclosure, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the disclosure, and it is intended to cover all such changes and modifications as fall within the scope of the disclosure.
Claims (8)
1. A display control method of a display device, characterized in that a display time of one frame of a display screen of the display device includes a data voltage writing period and a data voltage maintaining period, the display control method comprising:
inputting a changed common voltage to a common electrode line of the display device in the data voltage writing time period, so that a first difference value between an actual voltage of a pixel electrode of the display device and the common voltage is within a preset range;
and in the data voltage maintaining time period, inputting a constant common voltage to the common electrode line, so that the absolute value of the difference between the first difference and the second difference between the actual voltage of the pixel electrode of the display device and the common voltage is not more than a threshold value.
2. The display control method of the display device according to claim 1, wherein the inputting of the varied common voltage to the common electrode line of the display device comprises:
and carrying out multi-step boosting on the input common voltage.
3. The display control method of the display device according to claim 1, wherein a refresh frequency of the display device is lower than a threshold value.
4. A display control apparatus of a display device, characterized in that a display time of one frame of a display screen of the display device includes a data voltage writing period and a data voltage maintaining period, the display control apparatus comprising:
the common voltage input module is used for inputting a changed common voltage to a common electrode line of the display device in the data voltage writing time period so that a first difference value between an actual voltage of a pixel electrode of the display device and the common voltage is within a preset range;
the common voltage input module is further configured to input a constant common voltage to the common electrode line in the data voltage maintaining time period, so that an absolute value of a difference between a second difference between an actual voltage of a pixel electrode of the display device and the common voltage and the first difference is not greater than a threshold.
5. The display control apparatus of a display device according to claim 4, wherein the common voltage input module comprises:
and the boosting circuit is used for boosting the input common voltage in multiple stages.
6. The display control apparatus of a display device according to claim 4, wherein a refresh frequency of the display device is lower than a threshold value.
7. A display device characterized by comprising the display control means of the display device according to any one of claims 4 to 6.
8. A computer-readable storage medium, characterized in that a computer program is stored thereon, which, when being executed by a processor, implements the steps in the display control method of the display device according to any one of claims 1 to 3.
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| CN111243549B (en) * | 2020-03-25 | 2021-06-04 | 新相微电子(上海)有限公司 | Control method, device and system for thin film transistor liquid crystal display |
| CN114078438B (en) * | 2020-08-20 | 2022-12-13 | 上海和辉光电股份有限公司 | Driving method and system of OLED display panel |
| US11568823B2 (en) | 2020-08-11 | 2023-01-31 | Everdisplay Optronics (Shanghai) Co., Ltd | Driving method of display panel and display device |
| CN114489360B (en) * | 2022-02-16 | 2023-12-12 | 厦门天马微电子有限公司 | Touch pad detection method and display device |
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