CN109979386B - Driving method and device of display panel - Google Patents
Driving method and device of display panel Download PDFInfo
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- CN109979386B CN109979386B CN201910390360.XA CN201910390360A CN109979386B CN 109979386 B CN109979386 B CN 109979386B CN 201910390360 A CN201910390360 A CN 201910390360A CN 109979386 B CN109979386 B CN 109979386B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3216—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving method of a display panel, which comprises the steps of averagely dividing a storage module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2; converting the gray scale values into display data, and respectively storing each display data in the preset frame in a bit-by-bit manner; and after each preset time length, adjusting the brightness of each preset frame of the storage module. The invention also provides a driving device of the display panel, which realizes the display of the gray-scale picture of the display panel, widens the application range and also improves the visual effect of human eyes.
Description
Technical Field
The present invention relates to the field of display, and in particular, to a method and an apparatus for driving a display panel.
Background
Currently, the display panel includes LEDs, LECs, plasma, Passive Matrix Organic Light Emitting Diodes (PMOLEDs), Active Matrix Organic Light Emitting Diodes (AMOLEDs), and the like. The passive mode has a simple structure, drives the visual current to determine the gray scale, the resolution and the image quality expression, and is applied to small-size products with many single-color and multi-color products. The monochrome Passive Matrix Organic Light Emitting Diode (PMOLED) display panel has a simple manufacturing process and is generally applied, and in the actual circuit driving process, pixels need to be lighted line by line or column by column, and the driving of the monochrome PMOLED display panel is usually realized in a line-by-line scanning mode. The monochrome PMOLED display panel can only display monochrome pictures and cannot display gray-scale pictures, the gray-scale PMOLED display panel with higher cost is required for displaying the gray-scale pictures, and the monochrome pictures displayed on the monochrome PMOLED display panel have poor visual effect of human eyes.
Disclosure of Invention
In view of the above, the present invention provides a driving method and device for a display panel capable of displaying a gray-scale picture and improving a visual effect of human eyes, so as to solve the above-mentioned technical problems.
In one aspect, the present invention provides a driving method of a display panel, including:
averagely dividing the storage module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2;
converting the gray scale values into display data, and respectively storing each display data in the preset frame in a bit-by-bit manner;
and after each preset time length, adjusting the brightness of each preset frame of the storage module.
As a further improvement of the above technical solution, the bit-wise storing each of the display data in the preset frame includes:
the number of bits of the display data is the same as the number of the preset frames, the display data at least comprises two bits, and the display data are stored in the preset frames from low to high or from high to low respectively.
As a further improvement of the above technical solution, the preset time is a time for the display panel to display a picture, the display panel is a monochrome PMOLED, and each preset frame is scanned and displayed in a progressive scanning manner.
As a further improvement of the above technical solution, the display panel includes a plurality of pixels, the number of the pixels corresponds to the resolution, and the pixels are arranged in a matrix.
As a further improvement of the above technical solution, N is equal to 2, the preset frame includes a first frame and a second frame, three gray-scale values of 0, 1, and 2 are obtained correspondingly, the gray-scale values are converted into display data to obtain a high-order digit and a low-order digit, a storage module corresponding to the first frame is used for storing the high-order digit of the gray-scale values, and the second frame is used for storing the low-order digit of the gray-scale values;
or the storage module corresponding to the first frame is used for storing the low digits of the gray-scale value, and the second frame is used for storing the high digits of the gray-scale value.
As a further improvement of the above technical solution, the display data is a set of binary numbers, and the display data corresponds to the opening and closing of the pixels on the display panel.
As a further improvement of the above technical solution, adjusting the brightness of each preset frame of the storage module further includes:
and scanning a first frame in the preset frames line by line according to the preset duration, reducing the starting time of each line of the first frame, increasing the closing time of each line, and obtaining a gray-scale picture through gamma correction.
In another aspect, the present invention provides a driving apparatus for a display panel, including:
the memory is used for averagely dividing the memory module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2;
the controller is used for converting the gray-scale values into display data and respectively storing each display data in the preset frame in a bit-by-bit manner;
the controller is further configured to adjust the brightness of each preset frame of the storage module after each preset duration.
The driving method and the device of the display panel provided by the invention have the beneficial effects that: the method comprises the steps of averagely dividing a memory of a display panel into a plurality of equal parts to obtain frames of corresponding pixel points, wherein the memory is used for storing display data corresponding to the pixel points of each display panel, storing high bits and low bits of the display data in the memories corresponding to a first frame and an Nth frame respectively, and realizing the opening and closing of all the pixel points through the cyclic scanning of the controller, so that gray-scale pictures with uniform changes can be obtained, and the application range of the display panel is widened. Keeping the frame frequency unchanged, and reducing the opening time of each line of each frame and increasing the closing time of each line of each frame by scanning each line of each frame to obtain a gray-scale picture, so that the visual effect of human eyes is better.
Drawings
For a clearer explanation of the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a driving method of a display panel according to the present invention;
FIG. 2 is a schematic diagram of a 128 x 128bit memory module of the present invention showing three gray levels;
FIG. 3 is a diagram illustrating a linear distribution of the display luminance of FIG. 2;
FIG. 4 is a non-linear distribution diagram of the gamma corrected display brightness of FIG. 3;
FIG. 5 is a schematic diagram of three gray levels of a 128-by-128 resolution display panel according to the present invention;
FIG. 6 is a schematic diagram of adjusting display brightness of FIG. 5;
FIG. 7 is a schematic diagram of four gray levels of a 64 x 128 resolution display panel according to the present invention;
FIG. 8 is a block diagram of a driving apparatus for a display panel according to the present invention.
Description of the main element symbols:
100-driving means of the display panel; 120-a memory; 130-a controller; 150-first frame; 160-second frame.
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the following description sets forth more details for the purpose of providing a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms other than those described herein, and it will be readily apparent to those skilled in the art that the present invention may be embodied in many different forms without departing from the spirit and scope of the invention.
Referring to fig. 1, in one aspect, the present invention provides a driving method of a display panel, including:
step S101: averagely dividing the storage module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2;
in this embodiment, the display panel is a monochrome Passive matrix organic electroluminescent diode (PMOLED) display panel, and the resolution of the display panel is 128 × 128, that is, the display panel has 128 × 128 pixels, the pixels are arranged in a matrix, and the storage module is divided into N equal parts with equal size, which is equivalent to dividing the pixels for display control of the display panel into corresponding N equal parts. The driving method of the display panel is generally divided into a static driving method and a dynamic driving method, and the monochrome PMOLED display panel adopts the dynamic driving method to realize the gray scale visual effect. It should be noted that the gray-scale value is to divide the brightness variation between the brightest and darkest into corresponding portions so as to control the screen brightness corresponding to the signal input, each digital image is composed of a plurality of dots, which are called pixels (pixels), each pixel can present a plurality of different colors, and each pixel is composed of three sub-pixels of red, green and blue (RGB). The light source behind each sub-pixel can show different brightness levels, and the more the intermediate levels are, the finer the picture effect can be presented. Generally, the range of the gray scale value is 0-255, and the gray scale value represents the color change of the corresponding pixel point. For example, a storage module for storing display data with a storage capacity of 128 × 128bit is integrated in the driving chip, a monochrome picture with a resolution of 128 × 128 can be displayed, the storage module is divided into two parts with a size of 64 × 128, and the display data of the first frame and the display data of the second frame are respectively stored, so that three gray-scale values of 0, 1 and 2 are obtained.
Step S102: converting the gray scale values into display data, and respectively storing each display data in the preset frame in a bit-by-bit manner;
in this embodiment, the storage module of the display panel with a resolution of 128 × 128 is divided into two equal parts to obtain three gray scale values of the two preset frames, and one three-gray-scale picture with a resolution of 64 × 128 × 2 includes 64 × 128 × 2 binary display data, that is, each pixel point on the display panel corresponds to one display data, that is, the storage module is divided into several equal parts to obtain several preset frames, so as to obtain a corresponding added gray scale value. The gray scale value comprises a high-digit number and a low-digit number, the high-digit number of the display data is stored in a storage module corresponding to a first frame, the low-digit number of the display data is stored in a storage module corresponding to a second frame, or the low-digit number of the display data is stored in a storage module corresponding to the first frame, the high-digit number of the display data is stored in a storage module corresponding to the second frame, and each preset frame is conveniently scanned line by line to realize the display of the gray scale image of the display panel.
Step S103: and after each preset time length, adjusting the brightness of each preset frame of the storage module.
In this embodiment, taking a picture as an example, the time required for displaying the picture on the display panel is T, the display time per line of each frame obtained by dividing the storage module into two equal parts is T, the pixel points in each line are opened and closed according to the display data correspondingly stored in the preset frame, because the picture is displayed in a progressive scanning manner, and the number of lines displaying one frame of picture on the display panel is the same as the number of lines displaying two frames, i.e. the display time T of each line is not changed, that is, only the scanning time of one frame is the same as the sum of the scanning times of two frames obtained by dividing into two frames, the closing time T2 of the pixel points in each line of the preset frame is increased by decreasing the opening time T1 of the pixel points in each line of the preset frame, where T is T1+ T2, it should be noted that, when the opening and closing of the pixel points are controlled, gamma correction is required so that the picture displayed on the display panel has a dynamic gray scale visual effect.
Further, the bit-wise storing each display data in the preset frame includes:
the number of bits of the display data is the same as the number of the preset frames, the display data at least comprises two bits, and the display data are stored in the preset frames from low to high or from high to low respectively.
In this embodiment, for example, a three-gray-scale picture is displayed, the display data corresponds to the gray-scale value, the display data includes at least two digits, i.e., a high digit and a low digit, the digit of the display data is the same as the number of the preset frames, the storage module is divided into two equal parts to obtain a first frame and a second frame, the gray-scale value includes 0, 1, and 2, the corresponding display data is converted into 00, 01, and 10, the "00" indicates full darkness, i.e., the pixel point is in the off state, because "01" and "10" do not differ in displaying brightness, the "11" indicates full brightness, i.e., the pixel point is in the on state, the display data can be represented as 00, 01, and 11, the high digits of the display data 00, 01, and 11 are respectively 0, 1, and 1, the low digits of the display data 00, 01, and 11 are respectively 0, 1, and the high digits are stored in the storage module corresponding to the first frame, the low-order bits are stored in the storage module corresponding to the second frame, or the low-order bits are stored in the storage module corresponding to the first frame in a summary manner, and the high-order bits are stored in the storage module corresponding to the second frame.
Further, the preset time is the time when the display panel displays one picture, the display panel is a monochrome PMOLED, and each preset frame is scanned and displayed in a progressive scanning manner.
The display panel is a monochrome PMOLED, in a general case, the monochrome PMOLED can only display one monochrome picture, display content and display brightness of each frame corresponding to the display panel are completely the same, progressive scan (progressive scan) is completed once by one row, and all horizontal lines of the picture can be displayed on the display panel through the progressive scan, so that the display effect of the display panel is improved.
As shown in fig. 2, taking a monochrome pomoeld display panel with 64 × 128 resolutions as an example, the display panel includes 64 × 128 pixels arranged in a matrix, a memory module of 128 × 128bit is integrated inside a driving chip of the display panel, and it should be noted that the resolutions of the display panel and the display data of each frame are in one-to-one correspondence. The storage module is divided into two parts with 64 × 128 size, namely a first frame 150 and a second frame 160, and three gray scale values are correspondingly obtained, the memory is used for respectively storing the display data of the first frame 150 and the second frame 160, wherein each pixel point comprises three gray scale values of 0, 1 and 2, the binary system of the corresponding display data can be expressed as 2 ' b00, 2 ' b01 and 2 ' b11, namely, a 64 × 128-resolution three-gray-scale picture comprises 64 × 128 × 2 binary display data, the high digit number of the 2-bit display data of each pixel point is stored in the storage module corresponding to the first frame, the low digit number of the display data is stored in the storage module corresponding to the second frame, and the display data of the first frame 150 and the second frame 160 corresponding to the three gray scale values are shown in the following table:
| Gray 0 | Gray 1 | Gray 2 | |
| |
0 | 0 | 1 |
| |
0 | 1 | 1 |
TABLE 1
In table 1, the alternate display is implemented according to the display data of the first Frame (Frame 1) and the second Frame (Frame 2), the Gray level value (Gray) is 0, the corresponding two frames are completely dark, the Gray level value is 1, the corresponding one Frame is bright and one Frame is dark, the Gray level value is 2, and the corresponding two frames are completely bright. As shown in fig. 3, the display luminance of the first frame 150 is equal to that of the second frame 160 corresponding to three gray-scale values. Fig. 4 is a schematic diagram illustrating the visual effect of the gamma-corrected display brightness of fig. 3, where it should be noted that the display brightness is physically linear, but the human eye feels non-linear, so that further gamma correction is needed to make the display brightness physically non-linear, but the human eye feels linear, that is, the display brightness of the display panel changes uniformly.
In this embodiment, the high-order bits of the display data are stored in the storage module corresponding to the first frame 150, the second frame 160 is used for storing the low-order bits of the display data, and similarly, the first frame 150 may be used for storing the low-order bits of the display data, and the second frame 160 is used for storing the high-order bits of the display data, so that the gray scale change of the picture displayed in each frame can be realized even when the frame rate is constant. The corresponding table is as follows:
| Gray 0 | |
|
|
| |
0 | 1 | 1 |
| |
0 | 0 | 1 |
TABLE 2
It should be noted that although the value display data in the first frame 150 and the second frame 160 in table 1 and table 2 are slightly different, when progressive scanning is performed, the first frame 150 is displayed first, and the second frame 160 is displayed later, and although the display data in the first frame 150 and the second frame 160 are slightly different, the gray scale display of the picture can be achieved.
In addition, it is necessary to realize four-gray-scale image display of the monochrome PMOLED display panel with 42 × 128 resolution, that is, the storage module corresponding to the display panel with 128 × 128 resolution is divided into three equal parts on average, and it should be noted that the storage size of each part is 42 × 128bit, and there is redundancy of 2 × 128 bit. By the driving method of the display panel with three gray levels, the storage module is equally divided into three equal parts to obtain 4 gray level values, and the storage modules corresponding to the first frame, the second frame and the third frame are also obtained, wherein the gray level values are respectively 0, 1, 2 and 3, the corresponding display data can be represented as 3 'b 000, 3' b001, 3 'b 011 and 3' b111, the display data with the gray level value of 0 is 000, the display data with the gray level value of 1 is 001, the display data with the gray level value of 3 is 111, and the display data of the first frame, the second frame and the third frame corresponding to the gray level values are shown in the following table:
| Gray 0 | |
|
|
|
| |
0 | 0 | 0 | 1 |
| |
0 | 0 | 1 | 1 |
| |
0 | 1 | 1 | 1 |
TABLE 3
Or, the low-order bits of the 4 gray-scale values are stored in a first frame, and the rest of each bit of data is sequentially stored in the storage modules corresponding to the second frame and the third frame.
| Gray 0 | |
|
|
|
| |
0 | 1 | 1 | 1 |
| |
0 | 0 | 1 | 1 |
| |
0 | 0 | 0 | 1 |
TABLE 4
In the above tables 3 and 4, the 128 × 128 resolution storage module is divided into three equal parts to obtain four gray scale values, the data stored in the corresponding memory module in the first frame, the data stored in the corresponding storage module in the second frame 160, and the data stored in the corresponding storage module in the third frame are sequentially increased, in other words, the display data are rearranged according to a certain sequence, and each row of pixels in each frame is cyclically scanned to be opened and closed, so that a gray scale display picture is obtained.
As shown in fig. 5 and fig. 6, taking a monochrome display panel PMOLED with a resolution of 128 × 128 as an example, the corresponding pixels are arranged in 128 × 128 rows and 128 columns, COM [ M ] indicates a switch for controlling the pixels in each row, a COM [ M ] (M is 0, 1, 2, …, 127) signal is low level to indicate that the mth row is on for display, COM [ M ] is off and COM [ M +1] is on while the original brightness is not changed, and on the premise that the scanning time of the pixels in each row is not changed, the brightness of one frame can be reduced by reducing the on time of each row, that is, by increasing the non-overlapping time of the low level of the COM signal, so as to achieve brightness adjustment of the preset frame. The scan time for each row is equal, but the on time for that row is adjustable for a fixed scan time. As can be seen from comparison between FIG. 5 and FIG. 6, n is the number of rows of the pixel points, and the time interval from the COM [ n ] pull-down (on) to the COM [ n +1] pull-down (on) is the same, but COM [ n +1] is on while COM [ n ] in FIG. 5 is off; COM [ n ] in FIG. 6 is turned on for a period of time and then turned off in advance, and COM [ n +1] is turned on after a period of time. Therefore, there is a time between COM [ n ] and COM [ n +1] where both lines are off, which is used to adjust the brightness of the frame.
In addition, when displaying 128 × 128 monochrome pictures, the frame frequency is assumed to be 100 Hz. After the division into N frames, the frame rate of each frame in the N frames becomes 100 × N Hz since the line scanning time is not changed. Displaying a complete picture requires N frames with a frequency of 100Hz, which is the total frequency of the N frames and cannot be referred to as the frame frequency. The frame rate refers to the time for scanning all the pixels on the screen once. Therefore, the storage module of the memory 120 of the monochrome PNOLED display panel with any resolution is divided into N (N is 2, 3, 4.) frames with equal size, and is used for realizing the gray-scale picture with N + 1-order brightness linear display distribution, or the gray-scale picture with no more than 2^ N-order brightness nonlinear distribution, which is applied to the above-mentioned driving method of the display panel, and the frame frequency is kept unchanged (the time for scanning all the frames once is unchanged), all the preset frames are scanned in a circulating manner, and the visual effect of the dynamic gray scale can be displayed on the display panel, which is not described herein again.
In another embodiment, if the four grayscales of the 64 × 128 resolution display panel are required to be displayed, and the corresponding grayscale values are 0, 1, 2, and 3, respectively, the 128 × 128bit storage module is required to be divided into two equal parts, and the display data of the first frame and the second frame corresponding to the 4 grayscale values are shown in the following table:
| Gray 0 | |
|
|
|
| |
0 | 0 | 1 | 1 |
| |
0 | 1 | 0 | 1 |
TABLE 5
As shown in fig. 7, fig. 7 is a schematic diagram of four-grayscale display of a display panel with 64 × 128 resolution, that is, four-grayscale image display is realized by two frames of corresponding storage modules. In this embodiment, for the display requiring four-gray-scale pictures, the corresponding 4 gray-scale values are 0, 1, 2 and 3, respectively, the binary system of the corresponding display data is 00, 01, 10 and 11, and according to the storage of the high-order bits of the display data in the storage module corresponding to the first frame, the low-order bits of the display data are stored in the storage module corresponding to the second frame, wherein the display brightness of the display data corresponding to 01 and 10 is the same. The brightness of the second frame is increased by adjusting the display brightness of the first frame and the second frame, that is, decreasing the brightness of the first frame, and the on-time of each row of pixels is changed according to the fact that the brightness of each frame is changed under the premise that the frame frequency is not changed, which is the same as the brightness adjustment method described above, and is not repeated here.
As shown in fig. 8, in another aspect, the present invention further provides a driving apparatus 100 for a display panel, including:
the memory 120 is configured to averagely divide the memory module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, where N is an integer greater than or equal to 2;
a controller 130, configured to convert the grayscale values into display data, and store each display data in the preset frame in a bit-by-bit manner;
the controller 130 is further configured to adjust the brightness of each preset frame of the storage module after each preset duration.
In a specific application, the driving device of the display panel may be a driving chip, the driving chip has functions of storing display data of pixel points and controlling the opening and closing of the pixel points, the controller divides the memory into N equal parts according to the resolution of the display panel in advance to obtain N frames and N +1 gray scale values, divides the display data of each frame into corresponding "0" and "1" according to a binary bit number, and stores the display data in the storage module of the memory 120 corresponding to each frame in sequence according to a certain arrangement order, so that the gray scale values corresponding to the display data are alternately displayed to realize gray scale display of the display panel, and the adjustment of the frame brightness is realized by adjusting the opening and closing time of each row of pixel points in each frame, and the visual brightness display of a gray scale picture is uniformly changed by performing gamma correction when the pixel points are opened, the displayed picture is clearer and the visual effect of human eyes is better.
In this embodiment, by providing the driving device 100 for a display panel, the monochrome PMOLED display panel can display both monochrome pictures and grayscale pictures, the brightness of the display picture viewed by human eyes changes non-uniformly, and the display picture changes less sensitively when it is brighter, the storage module of the display panel is divided into a plurality of equal parts to display the grayscale pictures, and then the brightness change uniform distribution effect sensed by human eyes is obtained through gamma correction, so that the display picture of the display panel is clearer and finer, no additional hardware device is added on the original basis, and the use cost is reduced to a certain extent.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A method of driving a display panel, comprising:
averagely dividing the storage module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2;
converting the gray scale values into display data, and respectively storing each display data in the preset frame in a bit-by-bit manner;
after each preset time length, adjusting the brightness of each preset frame of the storage module;
the display data is a set of binary numbers, and the display data corresponds to the opening and closing of the pixel points on the display panel.
2. The method according to claim 1, wherein the bit-wise storing each of the display data in the preset frame comprises:
the number of bits of the display data is the same as the number of the preset frames, the display data at least comprises two bits, and the display data are stored in the preset frames from low to high or from high to low respectively.
3. The method according to claim 1, wherein the preset duration is a time when the display panel displays one picture, the display panel is a monochrome PMOLED, and each preset frame is scanned and displayed in a progressive scanning manner.
4. The method according to claim 3, wherein the display panel includes a plurality of pixels, the number of the pixels corresponds to the resolution, and the pixels are arranged in a matrix.
5. The method according to claim 1, wherein N is equal to 2, the preset frame includes a first frame and a second frame, three gray-scale values 0, 1, and 2 are obtained correspondingly, the gray-scale values are converted into display data to obtain a high-order bit and a low-order bit, the storage module corresponding to the first frame is configured to store the high-order bit of the gray-scale values, and the second frame is configured to store the low-order bit of the gray-scale values;
or the storage module corresponding to the first frame is used for storing the low digits of the gray-scale value, and the second frame is used for storing the high digits of the gray-scale value.
6. The method for driving a display panel according to claim 1, wherein adjusting the brightness of each of the preset frames of the memory module further comprises:
and scanning a first frame in the preset frames line by line according to the preset duration, reducing the starting time of each line of the first frame, increasing the closing time of each line, and obtaining a gray-scale picture through gamma correction.
7. A driving apparatus of a display panel, comprising:
the memory is used for averagely dividing the memory module into N preset frames according to the resolution of the display panel to obtain N +1 gray-scale values, wherein N is an integer greater than or equal to 2;
the controller is used for converting the gray-scale values into display data and respectively storing each display data in the preset frame in a bit-by-bit manner;
the controller is further used for adjusting the brightness of each preset frame of the storage module after each preset time length;
the display data is a set of binary numbers, and the display data corresponds to the opening and closing of the pixel points on the display panel.
8. The apparatus for driving a display panel according to claim 7, wherein the bit-wise storing each of the display data in the preset frame comprises:
the number of bits of the display data is the same as the number of the preset frames, the display data at least comprises two bits, and the display data are stored in the preset frames from low to high or from high to low respectively.
9. The driving device of a display panel according to claim 7, further comprising:
and according to the preset duration, when the controller carries out line-by-line scanning on a first frame in the preset frames, reducing the starting time of each line of the first frame, increasing the closing time of each line, and carrying out gamma correction to obtain a gray-scale picture.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847207A (en) * | 2017-01-06 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of driving method of display panel, display panel and display device |
| CN109300432A (en) * | 2017-07-24 | 2019-02-01 | 晶门科技（中国）有限公司 | The method that gray level image shows signal driving is carried out in monochromatic display panel |
| CN109658900A (en) * | 2019-02-28 | 2019-04-19 | 京东方科技集团股份有限公司 | Driving method, compensation circuit and driving device, the display device of display panel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8633919B2 (en) * | 2005-04-14 | 2014-01-21 | Semiconductor Energy Laboratory Co., Ltd. | Display device, driving method of the display device, and electronic device |
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| CN103871366B (en) * | 2014-04-02 | 2016-09-14 | 杭州士兰控股有限公司 | Gray scale display drive method and device for light-emitting diode display |
| CN105551432B (en) * | 2016-02-05 | 2018-09-04 | 赵建东 | Gray scale display drive method and gray scale display drive apparatus |
| CN107845370B (en) * | 2016-09-21 | 2019-09-17 | 北京京东方专用显示科技有限公司 | A kind of display methods of display panel, display panel and display device |
| CN108615506B (en) * | 2018-04-19 | 2020-04-21 | 深圳市国华光电科技有限公司 | Electrophoresis electronic paper display and display control method thereof |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847207A (en) * | 2017-01-06 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of driving method of display panel, display panel and display device |
| CN109300432A (en) * | 2017-07-24 | 2019-02-01 | 晶门科技（中国）有限公司 | The method that gray level image shows signal driving is carried out in monochromatic display panel |
| CN109658900A (en) * | 2019-02-28 | 2019-04-19 | 京东方科技集团股份有限公司 | Driving method, compensation circuit and driving device, the display device of display panel |
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