CN116805478B - Driving method of electronic paper display device and electronic equipment - Google Patents
Driving method of electronic paper display device and electronic equipment Download PDFInfo
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Abstract
The application provides a driving method of an electronic paper display device and electronic equipment, and belongs to the technical field of display equipment. According to the method, according to data to be displayed, a first gray scale corresponding to display data of a previous frame and a second gray scale corresponding to display data of a current frame are obtained, then a first driving voltage waveform for switching the first gray scale to the second gray scale along a first switching path is obtained, and a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path is obtained. Therefore, the first target parameter can be obtained according to the first driving voltage waveform, the second target parameter can be obtained according to the second driving voltage waveform, the driving voltage waveform with smaller target parameter can be selected as the target driving voltage waveform by comparing the first target parameter with the second target parameter, and therefore in the line scanning process, each data line is charged through the target driving voltage waveform to drive and display the current frame display data, driving time can be shortened, and refreshing speed can be improved.
Description
Technical Field
The present application relates to the field of electronic paper display devices, and in particular, to a driving method of an electronic paper display device and an electronic device.
Background
Electronic paper display devices (Electrophoretic Display, EPD) have low energy consumption, light weight, and thin thickness, and have become an important development point for modern electronic displays.
Currently, in the driving process of an electronic paper display device, a pre-adjusted driving voltage waveform is adopted for driving. The pre-adjusted driving voltage waveform is generally adjusted in a mode of driving from the previous gray level to pure black, driving from pure black to pure white and driving from pure white to the target gray level, namely the driving process is solidified, the driving time cannot be adjusted in real time, and the refreshing speed is low.
Disclosure of Invention
The embodiment of the application mainly aims to provide a driving method of an electronic paper display device and electronic equipment. The method aims at shortening the driving time and improving the refresh rate by selecting the driving voltage waveform with smaller corresponding target parameters as the target driving voltage waveform to drive.
To achieve the above object, a first aspect of an embodiment of the present application provides a driving method of an electronic paper display device, the method including:
according to the data to be displayed, acquiring a first gray scale corresponding to the display data of the previous frame and a second gray scale corresponding to the display data of the current frame;
Acquiring a first driving voltage waveform for switching the first gray scale to the second gray scale along a first switching path, and acquiring a first target parameter according to the first driving voltage waveform, wherein the first switching path comprises a path for switching the first gray scale to a first threshold gray scale, switching the first threshold gray scale to a second threshold gray scale and switching the second threshold gray scale to the second gray scale;
acquiring a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path, and acquiring a second target parameter according to the second driving voltage waveform, wherein the second switching path comprises a path for switching the first gray scale to the second threshold gray scale, switching the second threshold gray scale to the first threshold gray scale and switching the first threshold gray scale to the second gray scale;
comparing the first target parameter with the second target parameter;
when the first target parameter is larger than the second target parameter, determining the first driving voltage waveform as a target driving voltage waveform;
when the first target parameter is smaller than the second target parameter, determining the second driving voltage waveform as the target driving voltage waveform;
And in the line scanning process, charging each data line according to the target driving voltage waveform so as to drive and display the current frame of display data.
In one embodiment of the present application, the kind of the first target parameter includes at least one of a pulse number and a driving duration;
the kind of the second target parameter includes at least one of a pulse number and a driving duration.
In one embodiment of the present application, the first target parameter is a total pulse number and/or a total driving duration of the first driving voltage waveform, the second target parameter is a total pulse number and/or a total driving duration of the second driving voltage waveform, and the comparing the first target parameter with the second target parameter includes:
comparing the total pulse number of the first driving voltage waveform with the total pulse number of the second driving voltage waveform, and/or comparing the total driving duration of the first driving voltage waveform with the total driving duration of the second driving voltage waveform.
In one embodiment of the present application, the first target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the first threshold gray level and a second sub-parameter of a process of switching from the second threshold gray level to the second gray level;
The second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level.
In one embodiment of the present application, the acquiring a first driving voltage waveform for switching the first gray scale to the second gray scale along a first switching path, and acquiring a first target parameter according to the first driving voltage waveform includes:
invoking a first mapping relation between gray scale switching and driving voltage waveforms along a first switching path;
acquiring a first driving voltage waveform for switching the first gray scale to the second gray scale along the first switching path according to the first gray scale, the second gray scale and the first mapping relation;
and acquiring a first target parameter according to the first driving voltage waveform.
In one embodiment of the present application, the acquiring a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path, and acquiring a second target parameter according to the second driving voltage waveform includes:
invoking a second mapping relation between gray scale switching and driving voltage waveforms along a second switching path;
Acquiring a second driving voltage waveform for switching the first gray scale to the second gray scale along the second switching path according to the first gray scale, the second gray scale and the second mapping relation;
and acquiring a second target parameter according to the second driving voltage waveform.
In one embodiment of the application, when the first target parameter is equal to the second target parameter, the method comprises:
and selecting the first driving voltage waveform or the second driving voltage waveform as a target driving voltage waveform.
In an embodiment of the present application, the first threshold gray level is a gray level lower limit value of the electronic paper display device, and the second threshold gray level is a gray level upper limit value of the electronic paper display device.
In one embodiment of the present application, the first threshold gray level is 0 gray level, and the second threshold gray level is 255 gray level.
A second aspect of the embodiments of the present application proposes an electronic device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the driving method according to any of the embodiments of the present application when executing the computer program.
According to the technical scheme provided by the embodiment of the application, according to the data to be displayed, the first gray scale corresponding to the display data of the previous frame and the second gray scale corresponding to the display data of the current frame are obtained, then the first driving voltage waveform used for switching the first gray scale to the second gray scale along the first switching path is obtained, and the second driving voltage waveform used for switching the first gray scale to the second gray scale along the second switching path is obtained. Therefore, the first target parameter can be obtained according to the first driving voltage waveform, the second target parameter can be obtained according to the second driving voltage waveform, the driving voltage waveform with smaller target parameter can be selected as the target driving voltage waveform by comparing the first target parameter with the second target parameter, and therefore in the line scanning process, each data line is charged through the target driving voltage waveform to drive and display the current frame display data, driving time can be shortened, and refreshing speed can be improved.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
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The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of an electronic paper display screen.
Fig. 2 is a schematic diagram of the structure of a display portion of an electronic paper display screen.
Fig. 3 is a schematic diagram of a driving principle of an electronic paper display screen.
Fig. 4 is a flowchart of a driving method of an electronic paper display device according to an embodiment of the present application.
Fig. 5 is a flowchart of steps for acquiring a first driving voltage waveform for switching a first gray level to a second gray level along a first switching path and acquiring a first target parameter according to the first driving voltage waveform according to an embodiment of the present application.
Fig. 6 is a schematic diagram of a gray scale switching and driving voltage waveform mapping along a first switching path according to an embodiment of the present application.
Fig. 7 is a flowchart of a step of acquiring a second driving voltage waveform for switching a first gray level to a second gray level along a second switching path and acquiring a second target parameter according to the second driving voltage waveform according to an embodiment of the present application.
Fig. 8 is a schematic diagram of mapping of gray scale switching and driving voltage waveforms along a second switching path according to an embodiment of the present application.
Fig. 9 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Description of main reference numerals:
1-a surface layer; 2-transparent electrode (ITO); 3-capsules; 4-white pigment with positive dots; 5-negatively charged black pigment; 6-a transparent dispersion medium; 7-a lower electrode; 8-a support layer; 9-external light; 10-white; 11-black; 210-capsules; 220-a common voltage terminal; 230-a transparent dispersion medium; 240-transparent electrode (ITO); 250-TFT wiring layer; 260-TFT substrate; 270-a driving IC; 280-transmitting a carrier plate; 290-circuit driving board; 901-a processor; 902-a memory; 903-input/output interface; 904-a communication interface; 905-bus.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the application only and is not intended to be limiting of the application.
EPD (Electrophoretic Display, electronic paper display) is also known as electronic ink, and is a display made by using electrophoretic display technology. The electrophoretic display technology is to encapsulate black and white charged particles in a microcapsule structure, and to control the lifting movement of black and white particles with different charges by an external electric field so as to display black and white single color. Under the action of an electric field, the black particles and the white particles move continuously, and when the white particles rise to the upper surface, all ambient light irradiates the upper surface and is totally reflected, so that a white state, namely a paper state, is formed; when the electrodes are switched, the two colored particles will switch positions, the white particles will move to the bottom and the black particles will rise to the top, the light will be absorbed by the black particles, resulting in a black and white display. Alternatively, the upper surface may have a mixed state, and the two different particles may be mixed in proportion, so that different colors of black and white and gray scale may be formed. Since the EPD technology can exhibit a black-and-white display effect with high reflectivity and high contrast, and simultaneously has a memory effect, when an applied electric field is cancelled, a currently presented display is displayed immediately, as is the case with a printed sheet of paper. Due to the bi-stability, the image remains on the EPD screen for months or years after the power field is cancelled.
The EPD screen is a display in which a Gate control chip (Gate IC) and a Source chip (Source IC) on a TFT substrate are controlled by a timing control chip to continuously apply voltage shocks (20 ms positive and negative voltage pulses) to each pixel point. Referring to fig. 1, fig. 1 is a schematic structural view of an electronic paper display screen. The electronic paper display screen is composed of a plurality of electronic inks, and the electronic inks can be seen as capsules. Each capsule (position 6 in fig. 1) has a liquid charge therein, wherein positive charges are colored white and negative charges are colored black. When a positive and negative voltage is applied to one side (position 8 in fig. 1), the charged liquid will be attracted and repelled, respectively, so that each pixel can display white or black. Referring to fig. 2, fig. 2 is a schematic diagram of an architecture of a display portion of the electronic paper display screen, referring to fig. 3, fig. 3 is a schematic diagram of a driving principle of the electronic paper display screen, when a driving voltage G1 on a row line is high, a corresponding TFT (Thin Film Transistor ) is turned on, and a corresponding data line charges a pixel electrode; when the driving voltage G1 on the row line is low, the corresponding TFT is turned off and the pixel electrode voltage is maintained. Taking black and white as an example, the data line has only two voltages during charging, and the corresponding position is the data line charging voltage V1 when white and the data line charging voltage V2 when black. And so on for other pixels.
In the driving display process of the electronic paper display screen, a pre-adjusted driving voltage waveform is adopted for driving. The pre-adjusted driving voltage waveform is generally adjusted in such a way that the previous gray level is driven to pure black, then the pure black is driven to pure white, and then the pure white is driven to the target gray level. The driving process is solidified, the driving time can not be regulated in real time, and the refreshing speed is low.
Based on this, the embodiment of the application provides a driving method of an electronic paper display device. The method aims at shortening the driving time and improving the refresh rate by selecting the driving voltage waveform with smaller corresponding target parameters as the target driving voltage waveform to drive.
Referring to fig. 4, fig. 4 is a flowchart of a driving method of an electronic paper display device according to an embodiment of the present application, including but not limited to steps S410 to S470.
Step S410, according to the data to be displayed, obtaining the first gray scale corresponding to the display data of the previous frame and the second gray scale corresponding to the display data of the current frame.
In the embodiment of the application, in the driving display process, the first gray scale corresponding to the display data of the previous frame and the second gray scale corresponding to the display data of the current frame can be obtained according to the data to be displayed. Specifically, at least the last frame of display data needs to be stored, so that when the current frame of display data is displayed, the corresponding first gray scale can be determined according to the stored last frame of display data. Meanwhile, a second gray level corresponding to the display data of the current frame can be obtained.
Step S420, a first driving voltage waveform for switching the first gray level to the second gray level along a first switching path is obtained, and a first target parameter is obtained according to the first driving voltage waveform, wherein the first switching path includes a path for switching the first gray level to a first threshold gray level, switching the first threshold gray level to a second threshold gray level, and switching the second threshold gray level to the second gray level.
In the embodiment of the application, the first threshold gray level and the second threshold gray level can be adjusted and determined according to the number of gray levels which can be actually displayed by the electronic paper display device.
In one embodiment of the present application, the first threshold gray level is a gray level lower limit value of the electronic paper display device, and the second threshold gray level is a gray level upper limit value of the electronic paper display device.
For example, when the electronic paper display device is a 10bit panel, the corresponding first threshold gray level may be 0 gray level and the second threshold gray level may be 1023 gray level. When the electronic paper display device is an 8-bit panel, the corresponding first threshold gray level may be 0 gray level, and the second threshold gray level may be 255 gray levels.
In one embodiment of the present application, the first threshold gray level is 0 gray level and the second threshold gray level is 255 gray level.
In the embodiment of the application, when the electronic paper display device is an 8-bit panel, the first threshold gray level can be set to be 0 gray level, namely, pure black. The second threshold gray level is set to be 255 gray levels, namely pure white.
In the embodiment of the application, after the first gray scale corresponding to the display data of the previous frame and the second gray scale corresponding to the display data of the current frame are obtained, the first driving voltage waveform for switching the first gray scale to the second gray scale along the first switching path can be further obtained.
Referring to fig. 5, fig. 5 is a flowchart illustrating steps for acquiring a first driving voltage waveform for switching a first gray level to a second gray level along a first switching path and acquiring a first target parameter according to the first driving voltage waveform according to an embodiment of the present application, including but not limited to steps S510 to S530.
Step S510, calling a first mapping relation between gray scale switching and driving voltage waveforms along a first switching path;
step S520, according to the first gray scale, the second gray scale and the first mapping relation, a first driving voltage waveform for switching the first gray scale to the second gray scale along a first switching path is obtained;
in step S530, a first target parameter is obtained according to the first driving voltage waveform.
In the embodiment of the application, the driving voltage waveform applied in the process of changing from one gray level to another gray level can be obtained through debugging according to the characteristics of the charged particles. Because the driving mode of the capsule electronic paper is PWM debugging, the driving mode is divided into pulse width and positive and negative. Referring to fig. 6, fig. 6 is a schematic diagram of a gray scale switching and driving voltage waveform mapping along a first switching path, where fig. 6 includes a driving voltage waveform corresponding to a PWM waveform, i.e., a voltage waveform input to a data line, switched from a first gray scale to a first threshold gray scale, switched from the first threshold gray scale to a second threshold gray scale, and then switched from the second threshold gray scale to a second gray scale. In the embodiment of the application, according to the first mapping relation between the gray scale switching along the first switching path and the driving voltage waveform, after the first gray scale and the second gray scale are determined, the first driving voltage waveform for switching the first gray scale into the second gray scale along the first switching path can be directly determined. Thus, the first target parameter can be obtained according to the obtained first driving voltage waveform.
In one embodiment of the present application, the kind of the first target parameter includes at least one of a pulse number and a driving duration. The drive voltage waveform shown in fig. 6 is composed of a series of pulses, sometimes referred to as a pulse train. According to the switching between different gray levels, the driving voltage waveform is an aperiodic pulse waveform that does not repeatedly occur at a fixed time interval but is composed of pulses at random different time intervals. According to the obtained first driving voltage waveform, the pulse number and the driving duration corresponding to the first driving voltage waveform can be obtained.
Illustratively, referring to fig. 6, the number of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is X-M; the number of pulses in the driving voltage waveform corresponding to the process of switching from the first threshold gray level to the second threshold gray level is X; the number of pulses in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is N. Correspondingly, the driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is t1; the driving duration in the driving voltage waveform corresponding to the process of switching from the first threshold gray level to the second threshold gray level is t2; the driving duration in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is t3.
In one embodiment of the application, the first target parameter is the total number of pulses and/or the total duration of the driving of the first driving voltage waveform.
Illustratively, referring to fig. 6, the number of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is X-M; the number of pulses in the driving voltage waveform corresponding to the process of switching from the first threshold gray level to the second threshold gray level is X; the number of pulses in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is N. The total pulse number of the driving voltage waveform corresponding to the process of switching the first gray level to the second gray level along the first switching path is obtained as X-m+x+n=2x-m+n. Correspondingly, the driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is t1; the driving duration in the driving voltage waveform corresponding to the process of switching from the first threshold gray level to the second threshold gray level is t2; the driving duration in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is t3. The total driving duration of the driving voltage waveform corresponding to the process of switching the first gray level to the second gray level along the first switching path is t1+t2+t3.
In one embodiment of the present application, the first target parameter comprises a sum of a first sub-parameter of a process of switching from a first gray level to a first threshold gray level and a second sub-parameter of a process of switching from a second threshold gray level to a second gray level.
In the embodiment of the application, when the first sub-parameter and the second sub-parameter are the pulse numbers, the first target parameter is the sum of the first pulse number in the process of switching from the first gray level to the first threshold gray level and the second pulse number in the process of switching from the second threshold gray level to the second gray level. When the first sub-parameter and the second sub-parameter are driving time periods, the first target parameter is the sum of a first driving time period in the process of switching from the first gray level to the first threshold gray level and a second driving time period in the process of switching from the second threshold gray level to the second gray level.
Illustratively, referring to fig. 6, the number of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is X-M; the number of pulses in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is N. The first target parameter is X-M + N. The driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the first threshold gray level is t1; the driving duration in the corresponding driving voltage waveform in the process of switching from the second threshold gray level to the second gray level is t3. The first target parameter is t1+t3.
Step S430, a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path is obtained, and a second target parameter is obtained according to the second driving voltage waveform, wherein the second switching path comprises a path for switching the first gray scale to the second threshold gray scale, switching the second threshold gray scale to the first threshold gray scale, and switching the first threshold gray scale to the second gray scale.
In the embodiment of the application, after obtaining the first gray scale corresponding to the display data of the previous frame and the second gray scale corresponding to the display data of the current frame, a second driving voltage waveform for switching the first gray scale to the second gray scale along the second switching path can be further obtained.
Referring to fig. 7, fig. 7 is a flowchart of steps for obtaining a second driving voltage waveform for switching a first gray level to a second gray level along a second switching path, and obtaining a second target parameter according to the second driving voltage waveform according to an embodiment of the present application, including but not limited to steps S710 to S730.
Step S710, calling a second mapping relation between gray scale switching and driving voltage waveforms along a second switching path;
step S720, according to the first gray scale, the second gray scale and the second mapping relation, obtaining a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path;
In step S730, a second target parameter is obtained according to the second driving voltage waveform.
In the embodiment of the application, similarly, according to the characteristics of charged particles, the driving voltage waveform applied in the process of changing from one gray level to another gray level can be obtained through debugging. Because the driving mode of the capsule electronic paper is PWM debugging, the driving mode is divided into pulse width and positive and negative. Referring to fig. 8, fig. 8 is a schematic diagram of a gray scale switching and driving voltage waveform mapping along a second switching path according to an embodiment of the present application, where fig. 8 includes a driving voltage waveform corresponding to a PWM waveform, i.e., a voltage waveform input to a data line, switched from a first gray scale to a second threshold gray scale, switched from the second threshold gray scale to the first threshold gray scale, and then switched from the first threshold gray scale to the second gray scale. In the embodiment of the application, the second driving voltage waveform for switching the first gray scale to the second gray scale along the second switching path can be directly determined after the first gray scale and the second gray scale are determined according to the second mapping relation between the switching of the gray scale along the second switching path and the driving voltage waveform. Thus, the second target parameter can be obtained according to the obtained second driving voltage waveform.
In one embodiment of the present application, the kind of the second target parameter includes at least one of a pulse number and a driving duration. The drive voltage waveform shown in fig. 8 is composed of a series of pulses, sometimes referred to as a pulse train. According to the switching between different gray levels, the driving voltage waveform is an aperiodic pulse waveform that does not repeatedly occur at a fixed time interval but is composed of pulses at random different time intervals. And according to the acquired second driving voltage waveform, acquiring the pulse number and the driving duration corresponding to the second driving voltage waveform.
For example, referring to fig. 8, the number of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level is M; the number of pulses in the driving voltage waveform corresponding to the process of switching from the second threshold gray level to the first threshold gray level is X; the number of pulses in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is X-N. Correspondingly, the driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level is T1; the driving duration in the driving voltage waveform corresponding to the process of switching the second threshold gray level to the first threshold gray level is T2; the driving duration in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is T3.
In one embodiment of the application, the second target parameter is the total number of pulses and/or the total duration of the driving of the second driving voltage waveform.
Illustratively, referring to fig. 8, the number M of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level; the number of pulses in the driving voltage waveform corresponding to the process of switching from the second threshold gray level to the first threshold gray level is X; the number of pulses in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is X-N. The total pulse number of the driving voltage waveform corresponding to the process of switching the first gray level to the second gray level along the second switching path is M+X+X-N=2X+M-N. Correspondingly, the driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level is T1; the driving duration in the driving voltage waveform corresponding to the process of switching the second threshold gray level to the first threshold gray level is T2; the driving duration in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is T3. The total driving duration of the driving voltage waveform corresponding to the process of switching the first gray level to the second gray level along the second switching path is T1+T2+T3.
In one embodiment of the present application, the second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level.
In the embodiment of the application, when the first sub-parameter and the second sub-parameter are the pulse numbers, the first target parameter is the sum of the first pulse number in the process of switching from the first gray level to the second threshold gray level and the second pulse number in the process of switching from the first threshold gray level to the second gray level. When the first sub-parameter and the second sub-parameter are driving time periods, the first target parameter is the sum of a first driving time period in the process of switching from the first gray level to the second threshold gray level and a second driving time period in the process of switching from the first threshold gray level to the second gray level.
For example, referring to fig. 8, the number of pulses in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level is M; the number of pulses in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is X-N. The first target parameter is X + M-N. The driving duration in the corresponding driving voltage waveform in the process of switching from the first gray level to the second threshold gray level is T1; the driving duration in the corresponding driving voltage waveform in the process of switching from the first threshold gray level to the second gray level is T3. The first target parameter is t1+t3.
Step S440, comparing the first target parameter with the second target parameter;
in the embodiment of the application, after the first target parameter and the second target parameter are obtained, the first target parameter and the second target parameter can be compared in size.
Specifically, when the first target parameter is the total pulse number of the first driving voltage waveform and the second target parameter is the total pulse number of the second driving voltage waveform, the total pulse number of the first driving voltage waveform is compared with the total pulse number of the second driving voltage waveform. When the first target parameter is the driving total duration of the first driving voltage waveform and the second target parameter is the driving total duration of the second driving voltage waveform, comparing the driving total duration of the first driving voltage waveform with the driving total duration of the second driving voltage waveform.
Illustratively, the first target parameter shown in fig. 6 is the total number of pulses of the first driving voltage waveform is 2x—m+n, and the second target parameter shown in fig. 8 is the total number of pulses of the second driving voltage waveform is 2x+m—n. At this time, comparing the first target parameter with the second target parameter compares the magnitudes of 2X-M+N and 2X+M-N. The first target parameter shown in fig. 6 is a total driving duration of the first driving voltage waveform t1+t2+t3, and the second target parameter shown in fig. 8 is a total driving duration of the second driving voltage waveform t1+t2+t3. At this time, the first target parameter is compared with the second target parameter, and t1+t2+t3 are compared in size.
Specifically, when the first target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the first threshold gray level and a second sub-parameter of a process of switching from the second threshold gray level to the second gray level, the second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level, and the first sub-parameter and the second sub-parameter are pulse numbers, comparing the first target parameter with the second target parameter includes:
the sum of the first pulse number in the process of switching the first gray level to the first threshold gray level and the second pulse number in the process of switching the second threshold gray level to the second gray level and the sum of the first pulse number in the process of switching the first gray level to the second threshold gray level and the second pulse number in the process of switching the first threshold gray level to the second gray level.
For example, the first target parameter is X-m+n when the first pulse number in the process of switching the first gray level to the first threshold gray level is X-M and the second pulse number in the process of switching the second threshold gray level to the second gray level is N as shown in fig. 6. In fig. 8, the first pulse number in the process of switching the first gray level to the second threshold gray level is M, and the second pulse number in the process of switching the first threshold gray level to the second gray level is X-N, and the second target parameter is m+x-N. And comparing the first target parameter with the second target parameter, and comparing the sizes of the X-M+N and the M+X-N.
Specifically, when the first target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the first threshold gray level and a second sub-parameter of a process of switching from the second threshold gray level to the second gray level, the second target parameter includes a sum of the first sub-parameter of the process of switching from the first gray level to the second threshold gray level and the second sub-parameter of the process of switching from the first threshold gray level to the second gray level, and the first sub-parameter and the second sub-parameter are driving durations, comparing the first target parameter and the second target parameter includes:
the sum of the first driving time length of the process of switching the first gray level to the first threshold gray level and the second driving time length of the process of switching the second threshold gray level to the second gray level and the sum of the first driving time length of the process of switching the first gray level to the second threshold gray level and the second driving time length of the process of switching the first threshold gray level to the second gray level.
For example, in the process of switching the first gray level to the first threshold gray level shown in fig. 6, the first driving duration is t1, and in the process of switching the second threshold gray level to the second gray level, the second driving duration is t3, and the first target parameter is t1+t3. In fig. 8, the first driving duration of the process of switching the first gray level to the second threshold gray level is T1, and the second driving duration of the process of switching the first threshold gray level to the second gray level is T3, and the second target parameter is t1+t3. Thus comparing the first target parameter with the second target parameter and comparing the magnitudes of t1+t3 and t1+t3.
In step S450, when the first target parameter is greater than the second target parameter, the first driving voltage waveform is determined to be the target driving voltage waveform.
In the embodiment of the application, when the first target parameter is greater than the second target parameter, the first driving voltage waveform is determined to be the target driving voltage waveform.
Specifically, when the first target parameter is the total pulse number and/or the total driving duration of the first driving voltage waveform and the second target parameter is the total pulse number and/or the total driving duration of the second driving voltage waveform, determining that the first driving voltage waveform is the target driving voltage waveform when the total pulse number of the first driving voltage waveform is greater than the total pulse number of the second driving voltage waveform. Or when the total driving time of the first driving voltage waveform is longer than the total driving time of the second driving voltage waveform, determining the first driving voltage waveform as the target driving voltage waveform. Or when the total pulse number of the first driving voltage waveform is larger than the total pulse number of the second driving voltage waveform, and the driving total time length of the first driving voltage waveform is longer than the driving total time length of the second driving voltage waveform, determining that the first driving voltage waveform is the target driving voltage waveform.
Specifically, when the first target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the first threshold gray level and a second sub-parameter of a process of switching from the second threshold gray level to the second gray level; the second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level, and when the first sub-parameter includes a pulse number and/or a driving duration, a sum of the first pulse number of the process of switching from the first gray level to the first threshold gray level and the second pulse number of the process of switching from the second threshold gray level to the second gray level is greater than a sum of the first pulse number of the process of switching from the first gray level to the second threshold gray level and the second pulse number of the process of switching from the first threshold gray level to the second gray level, and the first driving voltage waveform is determined to be the target driving voltage waveform. Or when the sum of the first driving time length of the process of switching from the first gray level to the first threshold gray level and the second driving time length of the process of switching from the second threshold gray level to the second gray level is larger than the sum of the first driving time length of the process of switching from the first gray level to the second threshold gray level and the second driving time length of the process of switching from the first threshold gray level to the second gray level, determining the first driving voltage waveform as the target driving voltage waveform. Or when the sum of the first pulse number in the process of switching from the first gray level to the first threshold gray level and the second pulse number in the process of switching from the second threshold gray level to the second gray level is larger than the sum of the first pulse number in the process of switching from the first gray level to the second threshold gray level and the second pulse number in the process of switching from the first threshold gray level to the second gray level, and the sum of the first driving time length in the process of switching from the first gray level to the first threshold gray level and the second driving time length in the process of switching from the second threshold gray level to the second gray level is larger than the sum of the first driving time length in the process of switching from the first gray level to the second driving time length in the process of switching from the first gray level to the second gray level, determining the first driving voltage waveform as the target driving voltage waveform.
In step S460, when the first target parameter is smaller than the second target parameter, the second driving voltage waveform is determined as the target driving voltage waveform.
In the embodiment of the application, when the first target parameter is smaller than the second target parameter, the second driving voltage waveform is determined to be the target driving voltage waveform.
Specifically, when the first target parameter is the total pulse number and/or the total driving duration of the first driving voltage waveform and the second target parameter is the total pulse number and/or the total driving duration of the second driving voltage waveform, determining that the second driving voltage waveform is the target driving voltage waveform when the total pulse number of the first driving voltage waveform is smaller than the total pulse number of the second driving voltage waveform. Or when the total driving duration of the first driving voltage waveform is smaller than the total driving duration of the second driving voltage waveform, determining the second driving voltage waveform as the target driving voltage waveform. Or when the total pulse number of the first driving voltage waveform is smaller than the total pulse number of the second driving voltage waveform, and the driving total duration of the first driving voltage waveform is smaller than the driving total duration of the second driving voltage waveform, determining the second driving voltage waveform as the target driving voltage waveform.
Specifically, when the first target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the first threshold gray level and a second sub-parameter of a process of switching from the second threshold gray level to the second gray level; the second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level, and when the first sub-parameter includes a pulse number and/or a driving duration, a sum of the first pulse number of the process of switching from the first gray level to the first threshold gray level and the second pulse number of the process of switching from the second threshold gray level to the second gray level is smaller than a sum of the first pulse number of the process of switching from the first gray level to the second threshold gray level and the second pulse number of the process of switching from the first threshold gray level to the second gray level, and the second driving voltage waveform is determined to be the target driving voltage waveform. Or when the sum of the first driving time length of the process of switching from the first gray level to the first threshold gray level and the second driving time length of the process of switching from the second threshold gray level to the second gray level is smaller than the sum of the first driving time length of the process of switching from the first gray level to the second threshold gray level and the second driving time length of the process of switching from the first threshold gray level to the second gray level, determining the second driving voltage waveform as the target driving voltage waveform. Or when the sum of the first pulse number in the process of switching from the first gray level to the first threshold gray level and the second pulse number in the process of switching from the second threshold gray level to the second gray level is smaller than the sum of the first pulse number in the process of switching from the first gray level to the second threshold gray level and the second pulse number in the process of switching from the first threshold gray level to the second gray level, and the sum of the first driving time period in the process of switching from the first gray level to the first threshold gray level and the second driving time period in the process of switching from the second threshold gray level to the second gray level is smaller than the sum of the first driving time period in the process of switching from the first gray level to the second driving time period in the process of switching from the first gray level to the second gray level, determining the second driving voltage waveform as the target driving voltage waveform.
In the embodiment of the application, the first target parameter and the second target parameter are compared, so that the driving voltage waveform with smaller target parameter can be selected as the target driving voltage waveform to drive, the driving time can be shortened, and the refresh rate can be improved.
In one embodiment of the present application, when the first target parameter is equal to the second target parameter, the driving method includes:
and selecting the first driving voltage waveform or the second driving voltage waveform as a target driving voltage waveform.
In the embodiment of the present application, when the first target parameter is equal to the second target parameter, the first driving voltage waveform or the second driving voltage waveform is selected to be driven, and the corresponding driving time is consistent, so that the first driving voltage waveform or the second driving voltage waveform can be selected as the target driving voltage waveform. In the embodiment of the application, considering the convenience degree of selection, when the first target parameter is equal to the second target parameter, the driving voltage waveform selected by the display data of the previous frame can be directly selected for driving. For example, when the previous frame of display data is driven and displayed, the driving voltage waveform corresponding to the gray scale switching according to the first switching path is selected, and when the current frame is driven and displayed, if the first target parameter is equal to the second target parameter, the driving voltage waveform corresponding to the gray scale switching according to the first switching path, which is the same as the previous frame of display data, is selected for driving.
In step S470, in the line scanning process, each data line is charged according to the target driving voltage waveform, so as to drive and display the display data of the current frame.
In the embodiment of the application, after the target driving voltage waveform is determined, each data line can be charged according to the target driving voltage waveform in the line scanning process so as to drive and display the display data of the current frame. Because the determined target driving voltage waveform is the driving voltage waveform with smaller pulse number and/or driving duration, the driving time can be shortened, and the refreshing speed can be improved.
The embodiment of the application also provides electronic equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the driving method of the electronic paper display device when executing the computer program. The electronic equipment can be any intelligent terminal including a tablet personal computer, a vehicle-mounted computer and the like.
Referring to fig. 9, fig. 9 illustrates a hardware structure of an electronic device according to another embodiment, the electronic device includes:
the processor 901 may be implemented by a general purpose CPU (central processing unit), a microprocessor, an application specific integrated circuit (ApplicationSpecificIntegratedCircuit, ASIC), or one or more integrated circuits, etc. for executing related programs to implement the technical solution provided by the embodiments of the present application;
The memory 902 may be implemented in the form of read-only memory (ReadOnlyMemory, ROM), static storage, dynamic storage, or random access memory (RandomAccessMemory, RAM). The memory 902 may store an operating system and other application programs, and when the technical solution provided in the embodiments of the present disclosure is implemented by software or firmware, relevant program codes are stored in the memory 902, and the processor 901 invokes a driving method for executing the electronic paper display device according to the embodiments of the present disclosure;
an input/output interface 903 for inputting and outputting information;
the communication interface 904 is configured to implement communication interaction between the device and other devices, and may implement communication in a wired manner (e.g. USB, network cable, etc.), or may implement communication in a wireless manner (e.g. mobile network, WIFI, bluetooth, etc.);
a bus 905 that transfers information between the various components of the device (e.g., the processor 901, the memory 902, the input/output interface 903, and the communication interface 904);
wherein the processor 901, the memory 902, the input/output interface 903 and the communication interface 904 are communicatively coupled to each other within the device via a bus 905.
The embodiment of the application also provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program realizes the driving method of the electronic paper display device when being executed by a processor.
The memory, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory remotely located relative to the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The embodiments described in the embodiments of the present application are for more clearly describing the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
It will be appreciated by persons skilled in the art that the embodiments of the application are not limited by the illustrations, and that more or fewer steps than those shown may be included, or certain steps may be combined, or different steps may be included.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description of the application and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is merely a logical function division, and there may be another division manner in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including multiple instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing a program.
The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the embodiments of the present application. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.
Claims (8)
1. A driving method of an electronic paper display device, the method comprising:
according to the data to be displayed, acquiring a first gray scale corresponding to the display data of the previous frame and a second gray scale corresponding to the display data of the current frame;
acquiring a first driving voltage waveform for switching the first gray scale to the second gray scale along a first switching path, and acquiring a first target parameter according to the first driving voltage waveform, wherein the first switching path comprises a path for switching the first gray scale to a first threshold gray scale, switching the first threshold gray scale to a second threshold gray scale and switching the second threshold gray scale to the second gray scale;
acquiring a second driving voltage waveform for switching the first gray scale to the second gray scale along a second switching path, and acquiring a second target parameter according to the second driving voltage waveform, wherein the second switching path comprises a path for switching the first gray scale to the second threshold gray scale, switching the second threshold gray scale to the first threshold gray scale and switching the first threshold gray scale to the second gray scale;
Comparing the first target parameter with the second target parameter;
when the first target parameter is smaller than the second target parameter, determining the first driving voltage waveform as a target driving voltage waveform;
when the first target parameter is larger than the second target parameter, determining the second driving voltage waveform as the target driving voltage waveform;
in the line scanning process, charging each data line according to the target driving voltage waveform so as to drive and display the current frame display data;
the kind of the first target parameter includes at least one of a pulse number and a driving duration;
the kind of the second target parameter includes at least one of a pulse number and a driving duration;
the first target parameter comprises the sum of a first sub-parameter of the process of switching from the first gray level to the first threshold gray level and a second sub-parameter of the process of switching from the second threshold gray level to the second gray level;
the second target parameter includes a sum of a first sub-parameter of a process of switching from the first gray level to the second threshold gray level and a second sub-parameter of a process of switching from the first threshold gray level to the second gray level.
2. The method according to claim 1, wherein the first target parameter is a total number of pulses and/or a total duration of driving of the first driving voltage waveform, the second target parameter is a total number of pulses and/or a total duration of driving of the second driving voltage waveform, the comparing the first target parameter with the second target parameter comprises:
comparing the total pulse number of the first driving voltage waveform with the total pulse number of the second driving voltage waveform, and/or comparing the total driving duration of the first driving voltage waveform with the total driving duration of the second driving voltage waveform.
3. The method of claim 1, wherein the acquiring a first driving voltage waveform for switching the first gray level to the second gray level along a first switching path and acquiring a first target parameter from the first driving voltage waveform comprises:
invoking a first mapping relation between gray scale switching and driving voltage waveforms along a first switching path;
acquiring a first driving voltage waveform for switching the first gray scale to the second gray scale along the first switching path according to the first gray scale, the second gray scale and the first mapping relation;
And acquiring a first target parameter according to the first driving voltage waveform.
4. The method of claim 1, wherein the acquiring a second driving voltage waveform for switching the first gray level to the second gray level along a second switching path and acquiring a second target parameter from the second driving voltage waveform comprises:
invoking a second mapping relation between gray scale switching and driving voltage waveforms along a second switching path;
acquiring a second driving voltage waveform for switching the first gray scale to the second gray scale along the second switching path according to the first gray scale, the second gray scale and the second mapping relation;
and acquiring a second target parameter according to the second driving voltage waveform.
5. The method of claim 1, wherein when the first target parameter is equal to the second target parameter, the method comprises:
and selecting the first driving voltage waveform or the second driving voltage waveform as a target driving voltage waveform.
6. The method of claim 1, wherein the first threshold gray level is a lower gray level limit of the electronic paper display device and the second threshold gray level is an upper gray level limit of the electronic paper display device.
7. The method of claim 1, wherein the first threshold gray level is 0 gray level and the second threshold gray level is 255 gray level.
8. An electronic device comprising a memory storing a computer program and a processor implementing the method of any one of claims 1 to 7 when the computer program is executed by the processor.
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