CN113066415B - Display panel charging method and device and display terminal - Google Patents
Display panel charging method and device and display terminal Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- 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
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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Abstract
The application discloses a display panel charging method, which comprises the following steps: when a first display gray scale value of a current row of pixels is smaller than a first preset gray scale value, determining a first selected charging voltage corresponding to the first display gray scale value in a first preset lookup table; and charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value. The application also discloses a display panel charging device and a display terminal. By the display panel charging method, the display effect of the display panel is improved.
Description
Technical Field
The present disclosure relates to the field of display, and in particular, to a method and an apparatus for charging a display panel, and a display terminal.
Background
At present, the bad charging of a large-sized and high-refresh display panel is improved by a Line Over Driver (LOD).
In the related art, a display panel charging method is disclosed, wherein a charging gray scale value of a current line of pixels is determined by using a lookup table and a linear difference method based on a display gray scale value of a previous line of pixels and a display gray scale value of the current line of pixels, and the current line of pixels are charged by using a charging voltage corresponding to the charging gray scale value, so that the current line of pixels outputs brightness corresponding to the display gray scale value.
However, the display panel has a poor display effect by using the conventional display panel charging method.
Disclosure of Invention
The application mainly aims to provide a display panel charging method, a display panel charging device and a display terminal, and aims to solve the technical problem that the display effect of a display panel is poor when the existing display panel charging method is adopted in the prior art.
In order to achieve the above object, the present application provides a method for charging a display panel, the method comprising:
when a first display gray-scale value of a pixel on a current row is smaller than a first preset gray-scale value, determining a first selected charging voltage corresponding to the first display gray-scale value in a first preset lookup table;
and charging the current row of pixels by using the first selected charging voltage so that the current row of pixels outputs the brightness corresponding to the first display gray-scale value.
Optionally, the step of determining a first selected charging voltage corresponding to the first display gray-scale value in a first preset lookup table includes:
determining a first selected charging gray scale value corresponding to the first display gray scale value in the first preset lookup table;
a first selected charging voltage corresponding to the first selected charging gray scale value is determined in the first preset lookup table.
Optionally, before the step of determining the first selected charging voltage corresponding to the first selected charging gray-scale value in the first preset lookup table, the method further includes:
acquiring a preset gray scale value set and preset charging voltages corresponding to all gray scale values in the preset gray scale value set respectively;
and obtaining the first preset lookup table based on the preset gray-scale value set and the preset charging voltage.
Optionally, before the step of obtaining the first preset lookup table based on the preset gray-scale value set and the preset charging voltage, the method further includes:
acquiring a first preset charging gray scale value corresponding to a second preset gray scale value with the largest gray scale value in the preset gray scale value set and a second preset charging gray scale value corresponding to a third preset gray scale value with the smallest gray scale value in the preset gray scale value set;
the step of obtaining the first preset lookup table based on the preset gray scale value set and the preset charging voltage includes:
obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value and the second preset charging gray scale value.
Optionally, the step of obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, and the second preset charging gray scale value includes:
determining a first preset charging voltage with the maximum voltage value in the preset charging voltages;
determining a second preset charging voltage with the minimum voltage value in the preset charging voltages;
calculating a first charging voltage difference between the first preset charging voltage and the second preset charging voltage;
and obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, the second preset charging gray scale value and the first charging voltage difference.
Optionally, the step of obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, the second preset charging gray scale value, and the first charging voltage difference includes:
calculating a gray scale difference between the first preset charging gray scale value and the second preset charging gray scale value;
obtaining a unit charging voltage corresponding to a unit gray scale value based on the first charging voltage difference and the gray scale difference;
obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset gray scale value set.
Optionally, the step of obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset grayscale value set includes:
determining a second charging voltage difference between a preset charging voltage corresponding to each gray scale value in the preset gray scale value set and the second preset charging voltage;
obtaining a preset charging gray scale value corresponding to each gray scale value based on the unit charging voltage and the second charging voltage difference;
and obtaining the first preset lookup table based on each gray-scale value, the preset charging gray-scale value corresponding to each gray-scale value and the preset charging voltage corresponding to each gray-scale value.
Optionally, the method further includes:
when the first display gray scale value of the pixel in the current row is larger than or equal to the first preset gray scale value, obtaining a second selected charging gray scale value by utilizing a linear difference method based on the first display gray scale value, the second display gray scale value of the pixel in the previous row and a second preset lookup table;
obtaining a second selected charging voltage based on the second selected charging gray scale value;
and charging the pixels on the current line by using the second selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value.
Further, to achieve the above object, the present application also proposes a display panel charging device, the device including:
the searching module is used for determining a first selected charging voltage corresponding to a first display gray-scale value in a first preset searching table when the first display gray-scale value of the pixels on the current line is smaller than the first preset gray-scale value;
and the charging module is used for charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value.
In addition, in order to achieve the above object, the present application further provides a display terminal, where the display terminal is charged by using the display panel charging method according to any one of the above embodiments.
The technical scheme of the application provides a display panel charging method, which comprises the following steps: when a first display gray-scale value of a pixel on a current row is smaller than a first preset gray-scale value, determining a first selected charging voltage corresponding to the first display gray-scale value in a first preset lookup table; and charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value.
In the existing charging method for the display panel, when a first display gray scale value of a current row of pixels is smaller than a first preset gray scale value, a charging voltage corresponding to the first display gray scale value is determined by using a lookup table and a linear difference method, but when the first display gray scale value is smaller than the first preset gray scale value, the gray scale value and the corresponding charging voltage are nonlinearly changed, and the charging voltage determined by using the linear difference method is relatively low compared with an actual charging voltage, so that the charging rate of the current row of pixels is relatively low, and the display effect of the display panel is relatively poor; by using the charging method of the display panel, when the first display gray scale value of the current row of pixels is smaller than the first preset gray scale value, the corresponding first selected charging voltage is determined in the first preset lookup table, and the current row of pixels are charged by using the first selected charging voltage, wherein the first selected charging voltage is very close to the actual charging voltage corresponding to the display gray scale value, so that the charging rate of the current row of pixels is higher, and the display effect of the display panel is better. Therefore, the display panel charging method improves the display effect of the display panel.
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In order to more clearly illustrate 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 structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display terminal of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a schematic flowchart illustrating a first embodiment of a display panel charging method according to the present application;
FIG. 3 is a graph showing the variation of the charging voltage and the gray level of the display panel;
FIG. 4 is a graph showing the charging rate and gray level variation of a display panel;
fig. 5 is a block diagram of a display panel charging device according to a first embodiment of the present disclosure.
The implementation, functional features and advantages of the object of the present application will be further explained with reference to the embodiments, and with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope claimed in the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display terminal of a hardware operating environment according to an embodiment of the present application.
In general, a display terminal includes: at least one processor 301, a memory 302, and a display panel charging method program stored on the memory and executable on the processor, the display panel charging method program being configured to implement the steps of the display panel charging method as described previously.
The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. The processor 301 may further include an AI (Artificial Intelligence) processor for processing operations related to the display panel charging method, so that the display panel charging method model may be trained and learned autonomously, improving efficiency and accuracy.
In some embodiments, the terminal may further include: a communication interface 303 and at least one peripheral device. The processor 301, the memory 302 and the communication interface 303 may be connected by buses or signal lines. Various peripheral devices may be connected to communication interface 303 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, a display screen 305, and a power source 306.
The communication interface 303 may be used to connect at least one peripheral device related to I/O (Input/Output) to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and communication interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302 and the communication interface 303 may be implemented on a single chip or circuit board, which is not limited in this embodiment.
The Radio Frequency circuit 304 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 304 communicates with a communication network and other communication devices via electromagnetic signals. The rf circuit 304 converts the electrical signal into an electromagnetic signal for transmission, or converts the received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. Radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 304 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.
The display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 305 is a touch display screen, the display screen 305 also has the ability to capture touch signals on or over the surface of the display screen 305. The touch signal may be input to the processor 301 as a control signal for processing. At this point, the display screen 305 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 305 may be one, the front panel of the electronic device; in other embodiments, the display screens 305 may be at least two, which are respectively disposed on different surfaces of the electronic device or in a foldable design; in still other embodiments, the display 305 may be a flexible display disposed on a curved surface or a folded surface of the electronic device. Even further, the display screen 305 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The Display 305 may be made of LCD (liquid crystal Display), OLED (Organic Light-Emitting Diode), and the like.
The power supply 306 is used to supply power to various components in the electronic device. The power source 306 may be alternating current, direct current, disposable or rechargeable. When power source 306 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the terminal device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
Based on the hardware structure, the embodiment of the display panel charging method is provided.
Referring to fig. 2, fig. 2 is a schematic flowchart of a first embodiment of a display panel charging method according to the present application, where the method is applied to a display terminal, and the method includes the following steps:
step S11: when the first display gray-scale value of the pixels on the current row is smaller than a first preset gray-scale value, a first selected charging voltage corresponding to the first display gray-scale value is determined in a first preset lookup table.
The execution main body of the present application is a display terminal, the display terminal is installed with a display panel charging program, and the display panel charging method of the present application is implemented when the display terminal executes the display panel charging program. The display terminal is typically a large-size (4K large screen) and high-refresh-rate (120 Hz) display terminal.
Specifically, the step of determining a first selected charging voltage corresponding to the first display gray-scale value in a first preset lookup table includes: determining a first selected charging gray scale value corresponding to the first display gray scale value in the first preset lookup table; a first selected charging voltage corresponding to the first selected charging gray scale value is determined in the first preset lookup table.
In addition, when the first display gray scale value of the pixel in the current row is greater than or equal to the first preset gray scale value, a second selected charging gray scale value is obtained by utilizing a linear difference method based on the first display gray scale value, the second display gray scale value of the pixel in the previous row and a second preset lookup table; obtaining a second selected charging voltage based on the second selected charging gray scale value; and charging the current row of pixels by using the second selected charging voltage so that the current row of pixels outputs the brightness corresponding to the first display gray-scale value.
In this application, the first preset gray scale value may be 16 (the gray scale value of the display panel is from 0 to 255), and the pixels of the display panel are divided into a plurality of rows (or columns); generally, the gray scale value of each current row of pixels may utilize a first display gray scale value (the gray scale value that needs to be displayed by the current row of pixels) of the current row of pixels and a lookup table (a second preset lookup table or a first preset lookup table, when the second preset lookup table is utilized, the first display gray scale value is greater than or equal to the first preset gray scale value, and a linear interpolation method and the gray scale value of the previous row of pixels are also required to be utilized), determine a corresponding selected charging gray scale value (a first selected charging gray scale value or a second selected charging gray scale value), and utilize a selected charging voltage (a first selected charging voltage or a second selected charging voltage) corresponding to the selected charging gray scale value to charge the pixels of the current row.
Referring to fig. 3-4, fig. 3 is a graph showing the charging voltage and gray scale variation of the display panel; FIG. 4 is a graph showing the charging rate and gray level variation of a display panel.
In fig. 3, the left graph is a graph corresponding to a conventional display panel charging method, the right graph is a graph corresponding to the display panel charging method of the present application, in fig. 4, the left graph is a graph corresponding to a conventional display panel charging method, and the right graph is a graph corresponding to the display panel charging method of the present application.
When the first display gray scale value of the pixel in the previous row is smaller than the first preset gray scale value (in this application, the first preset gray scale value is 16 as an example), in fig. 3, the charging voltage determined by the conventional charging method for the display panel is a dotted line portion in a left side graph, and a corresponding solid line curve portion is an actual charging voltage, it can be seen that the change between the voltage and the gray scale value is not linear, so that the determined charging voltage is lower than the actual voltage, the charging rate is lower, referring to the left side graph in fig. 4, the dotted line is a reference line (charging rate 100%), and the charging rate when the first display gray scale value is smaller than the first preset gray scale value (circled solid line portion) is lower; when the first display gray scale value of the pixel in the previous row is smaller than the first preset gray scale value, in fig. 3, the first selected charging voltage determined by the display panel charging method of the present application is a dotted line portion in the right-side curve, and the corresponding implementation curve portion is an actual charging voltage, as a result, the determined first selected charging voltage is very close to the actual voltage, the charging rate is high, referring to the right-side graph in fig. 4, the dotted line is a reference line (the charging rate is 100%), and the charging rate (the circled solid line portion) when the first display gray scale value is smaller than the first preset gray scale value is high. Therefore, the display panel charging method enables the charging rate of the display panel to be high and the display effect of the display panel to be good.
It can be understood that, in the first preset lookup table, the display gray-scale values of the pixels in the current row, the charging gray-scale values corresponding to the display gray-scale values of the pixels in the current row, and the charging voltages corresponding to the charging gray-scale values are included, referring to table 1, table 1 is a first preset lookup table of the present application, and the following steps are performed:
TABLE 1
| Displaying gray scale values | Charging voltage | Gray scale value of charging |
| 0 | 8 | 0 |
| 1 | 8.8 | 24 |
| 2 | 9.068005 | 33 |
| 3 | 9.247256 | 38 |
| 4 | 9.409103 | 43 |
| 5 | 9.548327 | 47 |
| 6 | 9.661446 | 51 |
| 7 | 9.751941 | 53 |
| 8 | 9.823293 | 56 |
| 9 | 9.882463 | 57 |
| 10 | 9.927711 | 59 |
| 11 | 9.964257 | 60 |
| 12 | 9.995582 | 61 |
| 13 | 10.02343 | 62 |
| 14 | 10.04605 | 62 |
| 15 | 10.06519 | 63 |
| 16 | 10.1 | 64 |
The first preset lookup table comprises all gray-scale values of which the first display gray-scale value is less than or equal to the first preset gray-scale value, charging gray-scale values corresponding to all the gray-scale values and charging voltages corresponding to the charging gray-scale values. Generally, the charging process is a process, the gray scale value of the pixel does not reach the display gray scale value instantaneously, the displayed gray scale value is an intermediate gray scale value in the charging process and is not the maximum gray scale value corresponding to the charging process, and therefore, in order to reach the display gray scale value, the pixel is charged by using a voltage corresponding to a charging gray scale value higher than the display gray scale value.
In the second preset lookup table, the display gray scale values of the pixels in the current row, the display gray scale values of the pixels in the previous row, and the charging gray scale values are included, referring to table 2, table 2 is a second preset lookup table of the present application, and the following steps are included:
TABLE 2
| 0 | 16 | 32 | 48 | 64 | 80 | 96 | 112 | 128 | 144 | 160 | 176 | 192 | 208 | 224 | 240 | 255 | |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 16 | 64 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| 32 | 80 | 48 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| 48 | 96 | 64 | 60 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 |
| 64 | 112 | 80 | 76 | 74 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 64 |
| 80 | 128 | 96 | 92 | 90 | 88 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| 96 | 144 | 112 | 108 | 106 | 104 | 102 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 | 96 |
| 112 | 160 | 128 | 124 | 122 | 120 | 118 | 117 | 112 | 112 | 112 | 112 | 112 | 112 | 112 | 112 | 112 | 112 |
| 128 | 176 | 144 | 140 | 138 | 136 | 134 | 133 | 132 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 | 128 |
| 144 | 192 | 160 | 156 | 154 | 152 | 150 | 149 | 148 | 147 | 144 | 144 | 144 | 144 | 144 | 144 | 144 | 144 |
| 160 | 208 | 176 | 172 | 170 | 168 | 166 | 165 | 164 | 163 | 162 | 160 | 160 | 160 | 160 | 160 | 160 | 160 |
| 176 | 224 | 192 | 188 | 186 | 184 | 182 | 181 | 180 | 179 | 178 | 177 | 176 | 176 | 176 | 176 | 176 | 176 |
| 192 | 240 | 208 | 204 | 202 | 200 | 198 | 197 | 196 | 195 | 194 | 193 | 193 | 192 | 192 | 192 | 192 | 192 |
| 208 | 255 | 224 | 220 | 218 | 216 | 214 | 213 | 212 | 211 | 210 | 209 | 209 | 209 | 208 | 208 | 208 | 208 |
| 224 | 255 | 240 | 236 | 234 | 232 | 230 | 229 | 228 | 227 | 226 | 225 | 225 | 225 | 224 | 224 | 224 | 224 |
| 240 | 255 | 255 | 252 | 250 | 248 | 246 | 245 | 244 | 243 | 242 | 241 | 241 | 241 | 240 | 240 | 240 | 240 |
| 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 255 | 256 | 255 | 255 | 255 |
In table 2, the first row is the display gray scale value of the previous row of pixels, the first column on the left side is the display gray scale value of the current row of pixels, and the other contents are the charging gray scale values corresponding to the display gray scale values of the previous row of pixels and the display gray scale value of the current row of pixels, for example, 96 in the fifth row on the left side indicates that the display gray scale value of the previous row of pixels is 0, and the display gray scale value of the current row of pixels is 48, then the corresponding charging gray scale value is 96; in order to make the display gray scale value of the current row of pixels reach 48, the current row of pixels are charged by a charging voltage with the maximum gray scale value of 96.
It can be understood that when the display gray-scale values of the pixels in the current row and the display gray-scale values of the pixels in the current row do not appear in table 2, the corresponding charging gray-scale values need to be determined by using a linear difference method. For example, the display gray scale value of the previous row of pixels is 64, and the display gray scale value of the current row of pixels is 90, it is required to determine that the corresponding charging gray scale value is 98 by using the display gray scale value 64 of the previous row of pixels, the difference between the display gray scale values 96 and 80 of the current row of pixels, the difference between the charging gray scale values 88 and 104, and the linear interpolation method in table 2.
Further, the first preset lookup table may be obtained as follows: acquiring a preset gray scale value set and preset charging voltages corresponding to all gray scale values in the preset gray scale value set respectively; and obtaining the first preset lookup table based on the preset gray-scale value set and the preset charging voltage. Generally, the gray scale values in the preset gray scale value set do not exceed the first preset gray scale value, that is, when the gray scale values are higher than the first preset gray scale value, based on the display gray scale values of the pixels in the previous row and the display gray scale values of the pixels in the current row, using table 2 and a linear difference method, a more accurate charging gray scale value can be determined, and the obtained charging voltage is also more accurate, that is, the gray scale values are higher than the first preset gray scale value, that is, the change of the voltage and the gray scale values is approximately linear, so table 1 does not need to include a portion of the gray scale value higher than the first preset gray scale value.
Before the step of obtaining the first preset lookup table based on the preset gray-scale value set and the preset charging voltage, the method further includes: acquiring a first preset charging gray scale value corresponding to a second preset gray scale value with the largest gray scale value in the preset gray scale value set and a second preset charging gray scale value corresponding to a third preset gray scale value with the smallest gray scale value in the preset gray scale value set; correspondingly, the step of obtaining the first preset lookup table based on the preset gray scale value set and the preset charging voltage includes: and obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value and the second preset charging gray scale value.
Specifically, the step of obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, and the second preset charging gray scale value includes: determining a first preset charging voltage with the maximum voltage value in the preset charging voltages; determining a second preset charging voltage with the minimum voltage value in the preset charging voltages; calculating a first charging voltage difference between the first preset charging voltage and the second preset charging voltage; and obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, the second preset charging gray scale value and the first charging voltage difference.
In addition, the step of obtaining the first preset lookup table based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value, the second preset charging gray scale value, and the first charging voltage difference includes: calculating a gray scale difference between the first preset charging gray scale value and the second preset charging gray scale value; obtaining a unit charging voltage corresponding to a unit gray scale value based on the first charging voltage difference and the gray scale difference; obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset gray scale value set.
Finally, the step of obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage, and the preset grayscale value set includes: determining a second charging voltage difference between a preset charging voltage corresponding to each gray scale value in the preset gray scale value set and the second preset charging voltage; obtaining a preset charging gray-scale value corresponding to each gray-scale value based on the unit charging voltage and the second charging voltage difference; and obtaining the first preset lookup table based on each gray-scale value, a preset charging gray-scale value corresponding to each gray-scale value and a preset charging voltage corresponding to each gray-scale value.
It should be noted that the gray-scale values in the preset gray-scale value set generally include all the gray-scale values in [0, the first preset gray-scale value ] set, each gray-scale value corresponds to a preset charging voltage, and meanwhile, the smallest third preset gray-scale value (0) in the preset gray-scale value set corresponds to a second preset charging gray-scale value (0), and the largest second preset gray-scale value (16 in the present application) in the preset gray-scale value set corresponds to a first preset charging gray-scale value (64 in the present application), which needs to be obtained by searching the first preset charging gray-scale value and the second preset charging gray-scale value based on the preset gray-scale value set and the preset charging voltage (preset charging voltage corresponding to each gray-scale value in the preset gray-scale value set, where the preset gray-scale values in the present application include 17: 0-16, that is to indicate that all the gray-scale values are less than or equal to 16, and the preset charging voltages also include 17).
Specifically, it is necessary to determine the maximum first preset charging voltage (see 10.1V in table 1) and the minimum second preset charging voltage (see 8V in table 1, the charging voltage is minimum, and the corresponding gray scale value is also minimum, that is, the third preset gray scale value corresponds to the second preset charging voltage), and the first charging voltage difference (see data in table 1, it is 2.1V to obtain the first charging voltage difference), and based on the preset gray scale value set, the preset charging voltage, the first preset charging gray scale value (this application is 64), the second preset charging gray scale value (this application is 0) and the first charging voltage difference (this application may be 2.1V), obtain the first preset lookup table.
In addition, a gray scale difference (64) between a first preset charging gray scale value (64 in the present application) and a second preset charging gray scale value (0 in the present application) is determined, and based on the first charging voltage difference and the gray scale difference, a unit charging voltage (0.032813V in the present application, which is an approximate value, and may take three significant digits, i.e., 0.0328) corresponding to the unit gray scale value is obtained, that is, calculated in the present application by: (10.1-8)/(64-0) =0.032813V; and obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset gray scale value set.
In addition, for each gray scale value in the preset gray scale value set, a second charging voltage difference of a second preset charging voltage (8V) corresponding to a preset charging voltage corresponding to each gray scale value and a third preset gray scale value (0 in the present application) is respectively determined, a quotient of the second charging voltage difference and a unit charging voltage is calculated, the quotient is the preset charging gray scale value corresponding to the preset gray scale value, the first preset lookup table is obtained based on each gray scale value, the preset charging gray scale value corresponding to each gray scale value and the preset charging voltage corresponding to each gray scale value, all the gray scale values in the preset gray scale value set are traversed, the corresponding preset charging gray scale values are obtained by using the method, and the first preset lookup table can be obtained.
For example, the display gray level is 9, and the corresponding preset charging voltage is 9.882463V, wherein the first preset charging voltage is 10.1V, the second preset charging voltage is 8V, and the unit charging voltage is 0.032813V; it is determined that the difference between 9.882463V and 8V is 1.882463V, and based on a quotient 57 of 1.882463V and 0.032813V (rounded here because the gray scale values are all integer values), it is determined that when the display gray scale value is 9, the corresponding charging gray scale value is 57, and the corresponding charging voltage is 9.882463V. Wherein, the data in table 1 can be referred to determine the charging gray scale values corresponding to the gray scale values between 0 and 16.
Step S12: and charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value.
The corresponding charging voltage is determined, i.e. the current row of pixels is charged.
The technical scheme of the application provides a display panel charging method, which comprises the following steps: when a first display gray scale value of a current row of pixels is smaller than a first preset gray scale value, determining a first selected charging voltage corresponding to the first display gray scale value in a first preset lookup table; and charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value.
In the existing charging method for the display panel, when a first display gray scale value of a current row of pixels is smaller than a first preset gray scale value, a charging voltage corresponding to the first display gray scale value is determined by using a lookup table and a linear difference method, but when the first display gray scale value is smaller than the first preset gray scale value, the gray scale value and the corresponding charging voltage are nonlinearly changed, and the charging voltage determined by using the linear difference method is relatively low compared with an actual charging voltage, so that the charging rate of the current row of pixels is relatively low, and the display effect of the display panel is relatively poor; by using the charging method of the display panel, when the first display gray scale value of the current row of pixels is smaller than the first preset gray scale value, the corresponding first selected charging voltage is determined in the first preset lookup table, and the current row of pixels are charged by using the first selected charging voltage, wherein the first selected charging voltage is very close to the actual charging voltage corresponding to the display gray scale value, so that the charging rate of the current row of pixels is higher, and the display effect of the display panel is better. Therefore, the display panel charging method improves the display effect of the display panel
Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of a display panel charging apparatus for a display terminal according to the present application, the apparatus including:
the searching module 10 is configured to determine, in a first preset lookup table, a first selected charging voltage corresponding to a first display gray scale value when the first display gray scale value of a current row of pixels is smaller than the first preset gray scale value;
the charging module 20 is configured to charge the current row of pixels with the first selected charging voltage, so that the current row of pixels outputs a luminance corresponding to the first display gray scale value.
The above description is only an alternative embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which are made by the following claims and their equivalents, or which are directly or indirectly applicable to other related arts, are intended to be included within the scope of the present application.
Claims (5)
1. A method for charging a display panel, the method comprising:
when a first display gray scale value of a current row of pixels is smaller than a first preset gray scale value, determining a first selected charging voltage corresponding to the first display gray scale value in a first preset lookup table;
charging the pixels on the current line by using the first selected charging voltage so as to enable the pixels on the current line to output the brightness corresponding to the first display gray-scale value;
wherein the step of determining a first selected charging voltage corresponding to the first display gray scale value in a first predetermined lookup table comprises:
acquiring a preset gray scale value set and preset charging voltages corresponding to all gray scale values in the preset gray scale value set respectively;
acquiring a first preset charging gray scale value corresponding to a second preset gray scale value with the largest gray scale value in the preset gray scale value set and a second preset charging gray scale value corresponding to a third preset gray scale value with the smallest gray scale value in the preset gray scale value set;
determining a first preset charging voltage with the maximum voltage value in the preset charging voltages; determining a second preset charging voltage with the minimum voltage value in the preset charging voltages; calculating a first charging voltage difference between the first preset charging voltage and the second preset charging voltage;
calculating a gray scale difference between the first preset charging gray scale value and the second preset charging gray scale value;
obtaining a unit charging voltage corresponding to a unit gray scale value based on the first charging voltage difference and the gray scale difference;
obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset gray scale value set;
determining a first selected charging gray scale value corresponding to the first display gray scale value in the first preset lookup table;
a first selected charging voltage corresponding to the first selected charging gray scale value is determined in the first preset lookup table.
2. The method of claim 1, wherein the step of obtaining the first predetermined lookup table based on the unit charging voltage, the predetermined charging voltage, and the predetermined set of grayscale values comprises:
determining a second charging voltage difference between a preset charging voltage corresponding to each gray scale value in the preset gray scale value set and the second preset charging voltage;
obtaining a preset charging gray-scale value corresponding to each gray-scale value based on the unit charging voltage and the second charging voltage difference;
and obtaining the first preset lookup table based on each gray-scale value, a preset charging gray-scale value corresponding to each gray-scale value and a preset charging voltage corresponding to each gray-scale value.
3. The method of claim 1, wherein the method further comprises:
when the first display gray scale value of the pixel in the current row is larger than or equal to the first preset gray scale value, obtaining a second selected charging gray scale value by utilizing a linear difference method based on the first display gray scale value, the second display gray scale value of the pixel in the previous row and a second preset lookup table;
obtaining a second selected charging voltage based on the second selected charging gray scale value;
and charging the current row of pixels by using the second selected charging voltage so that the current row of pixels outputs the brightness corresponding to the first display gray-scale value.
4. A display panel charging apparatus, comprising:
the searching module is used for determining a first selected charging voltage corresponding to a first display gray-scale value in a first preset searching table when the first display gray-scale value of the pixels on the current line is smaller than the first preset gray-scale value;
a charging module, configured to charge the current row of pixels with the first selected charging voltage, so that the current row of pixels outputs a luminance corresponding to the first display gray scale value;
the searching module is further used for acquiring a preset gray scale value set and preset charging voltages corresponding to the gray scale values in the preset gray scale value set respectively;
acquiring a first preset charging gray scale value corresponding to a second preset gray scale value with the largest gray scale value in the preset gray scale value set and a second preset charging gray scale value corresponding to a third preset gray scale value with the smallest gray scale value in the preset gray scale value set;
determining a first preset charging voltage with the maximum voltage value in the preset charging voltages; determining a second preset charging voltage with the minimum voltage value in the preset charging voltages; calculating a first charging voltage difference between the first preset charging voltage and the second preset charging voltage;
calculating a gray scale difference between the first preset charging gray scale value and the second preset charging gray scale value;
obtaining a unit charging voltage corresponding to a unit gray scale value based on the first charging voltage difference and the gray scale difference;
obtaining the first preset lookup table based on the unit charging voltage, the preset charging voltage and the preset gray scale value set;
determining a first selected charging gray scale value corresponding to the first display gray scale value in the first preset lookup table;
a first selected charging voltage corresponding to the first selected charging gray scale value is determined in the first preset lookup table.
5. A display terminal, characterized in that the display terminal is charged by the display panel charging method according to any one of claims 1 to 3.
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