CN110675800A - Display screen driving method and device - Google Patents
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- 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
Abstract
The embodiment of the application discloses a display screen driving method and device, which are used for realizing scrolling display. The method in the embodiment of the application comprises the following steps: acquiring a plurality of display items; acquiring respective character bitmap information of a plurality of display items, wherein the display items have corresponding dot matrix information, the dot matrix information is pre-stored in a first storage unit, and the byte number of the character bitmap information corresponding to the display items is smaller than that of the dot matrix information corresponding to the target display item; writing a plurality of the character bitmap information into a second storage unit; determining a target display item required to be displayed by each rolling screen from the plurality of display items according to a preset rolling display rule; reading target dot matrix information corresponding to the target display item from the first storage unit; and writing the target dot matrix information into a display memory of a display screen so that the display screen displays the target display item according to the target dot matrix information.
Description
Technical Field
The embodiment of the application relates to the field of display, in particular to a display screen driving method and device.
Background
With the development of science and technology, more and more electronic products are in daily life. Many devices are provided with display screens to show people data such as electronic scales, blood pressure meters, and hand rings.
At present, not all built-in driving chips of display screens in the market support control commands of single-screen or multi-screen scrolling display. The common scrolling display method is to open a display buffer memory with one screen of dot matrix information in the data memory of the main control chip driving the display screen, store the dot matrix information of one screen in the display buffer memory, and output the dot matrix information in the main control chip buffer memory to the display memory of the display screen through a serial peripheral interface or other communication modes, so as to realize the display of the content of each screen.
In the method, a cache with large occupied space needs to be developed in a data memory of a main control chip for displaying information of each screen, and a plurality of cache spaces need to be developed under the condition of rolling display. In the scheme of the general low-cost sphygmomanometer or electronic scale, the data memory space of the adopted main control chip is limited, and a plurality of display caches are opened up without enough cache space.
Disclosure of Invention
In order to solve the problem that the data memory space of the main control chip applied to driving the display screen is insufficient during scrolling, the embodiment of the application provides the following solution.
The application provides a display screen driving method in a first aspect, which is applied to a main control chip for driving a display screen, and the method comprises the following steps:
acquiring a plurality of display items;
acquiring respective character bitmap information of a plurality of display items, wherein the display items have corresponding dot matrix information, the dot matrix information is pre-stored in a first storage unit, and the byte number of the character bitmap information corresponding to the display items is smaller than that of the dot matrix information corresponding to the target display item;
writing a plurality of the character bitmap information into a second storage unit;
determining a target display item required to be displayed by each rolling screen from the plurality of display items according to a preset rolling display rule;
reading target dot matrix information corresponding to the target display item from the first storage unit;
and writing the target dot matrix information into a display memory of a display screen so that the display screen displays the target display item according to the target dot matrix information.
Preferably, the character bitmap information includes: a pixel size of the display item;
the method for determining the target display item required to be displayed by each scroll screen from the plurality of display items according to the preset scroll display rule comprises the following steps:
determining a pixel size of the display screen;
and according to the arrangement sequence of the display items, respectively and sequentially determining the display items of which the sum of the pixel sizes accords with the pixel size of the display screen as target display items to be displayed on each scroll screen.
Preferably, the determining, according to the arrangement order of the display items, the display items whose total pixel size conforms to the pixel size of the display screen in turn, as the target display item to be displayed on each scroll screen, includes:
arranging the display items in a logical page according to the arrangement sequence of the display items;
taking a first pixel column of the logic page as a current starting column, and intercepting a page segment with a first preset length from the logic page;
determining the display items included in the page fragment as target display items to be displayed by a scroll screen;
and moving the current starting column backwards by a second preset length, and returning to the step of cutting a page segment with the first preset length from the logic page until the current starting column is moved to the tail pixel column of the logic page or all the display items are determined as target display items.
Preferably, the character bitmap information includes: a font library identifier showing an item;
the reading of the target dot matrix information corresponding to the target display item from the first storage unit includes:
determining the format type of the target display item according to the word stock identification;
determining a target data set corresponding to the format type of the target display item according to a preset corresponding relation between the format type and the data set; wherein the target data set is stored in a first storage unit;
and reading target dot matrix information corresponding to the target display item from the target data set.
Preferably, the character bitmap information includes a dot matrix identifier, a character code, and a dot matrix data buffer address;
the reading of the target dot matrix information corresponding to the target display item from the first storage unit includes:
determining a dot matrix data buffer area in the first storage unit according to the dot matrix data buffer area address; and reading target dot matrix information corresponding to the target display item in the dot matrix data buffer area according to the dot matrix identification and the character code.
Preferably, the reading of the target dot matrix information corresponding to the target display item in the dot matrix data buffer area according to the dot matrix identifier and the character code includes:
acquiring a pre-established index file, wherein the index file records the corresponding relation between dot matrix identifications and a word stock; determining a target word stock corresponding to the dot matrix identifier of the target display item in the index file according to the dot matrix identifier of the target display item; the target word stock stores lattice information;
and acquiring the dot matrix information corresponding to the character codes of the target display items from the target word stock as target dot matrix information according to the preset corresponding relation between the character codes and the dot matrix information.
A second aspect of the present application provides a display screen driving apparatus, including:
a first acquisition unit configured to acquire a plurality of display items;
the second acquisition unit is used for acquiring the character bitmap information of each display item, wherein the display items have corresponding dot matrix information, the dot matrix information is stored in the first storage unit in advance, and the byte number of the character bitmap information corresponding to the display items is smaller than that of the dot matrix information corresponding to the target display item;
a first writing unit configured to write a plurality of the character bitmap information into a second storage unit;
the first confirming unit is used for determining a target display item required to be displayed by each rolling screen from the plurality of display items according to a preset rolling display rule;
the reading unit is used for reading the target dot matrix information corresponding to the target display item from the first storage unit;
and the second writing unit is used for writing the target dot matrix information into a display memory of a display screen so that the display screen displays the target display item according to the target dot matrix information.
Further, the character bitmap information includes: a pixel size of the display item;
the determination unit includes:
the first determining module is used for determining the pixel size of the display screen;
and the second determining module is used for respectively and sequentially determining the display items of which the total pixel size accords with the pixel size of the display screen according to the arrangement sequence of the display items, and the display items are used as target display items to be displayed by each rolling screen.
Further, the determining unit includes:
the arrangement module is used for arranging the display items in a logic page according to the arrangement sequence of the display items;
the intercepting module is used for taking a first pixel column of the logic page as a current starting column and intercepting a page segment with a first preset length from the logic page;
the third determining module is used for determining the display items included in the page fragment as target display items to be displayed by the scroll screen;
and the backward moving module is used for moving the current starting column backward by a second preset length and returning to the step of cutting out the page segment with the first preset length from the logic page until the current starting column moves to the last pixel column of the logic page or all the display items are determined as target display items.
A third aspect of the present application provides another display screen driving apparatus, where the display screen driving apparatus includes a processor, a first memory, a second memory, and an output interface, the first memory is a flash memory or a program memory, the second memory is a data memory, the first memory stores an object program, and the output interface is connected to a display screen, and when the object program in the first memory is executed by the processor, the display screen driving method of the first aspect is implemented.
According to the technical scheme, the embodiment of the application has the following advantages: the method only opens a space for storing the character bitmap information corresponding to the display item in the data memory of the main control chip applied to the display screen, occupies less space than the space occupied by storing the dot matrix information, stores the dot matrix information occupying larger space in other storage spaces, and solves the problem of insufficient space of the data memory when the main control chip of the display screen displays in a rolling manner.
Drawings
Fig. 1 is an application scene diagram of a display screen driving device in an embodiment of the present application;
FIG. 2 is a flowchart illustrating a display driving method according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a logical page in an embodiment of the present application;
FIG. 4 is another schematic diagram of a logical page in the embodiment of the present application
FIG. 5 is a schematic structural diagram of a display panel driving apparatus according to an embodiment of the present application
Fig. 6 is another schematic structural diagram of the display panel driving apparatus in the embodiment of the present application.
Detailed Description
The embodiment of the application provides a driving method of a display screen, which is used for realizing scrolling display of the display screen.
An application scenario related to the embodiment of the present application is shown in fig. 1, and a display system for scrolling generally includes: the system comprises a main control processor 101, a first storage unit 102, a second storage unit 103, a display memory 104, a display screen 105 and a driver chip processor 106. The main control processor 101 may be a microprocessor with computing and processing capabilities on a main control chip, the first storage unit 102 may be a flash memory or a read only memory associated with the main control chip, and the second storage unit 103 has a smaller capacity than the first storage unit 102, and is usually a data memory on the main control chip, which is also called a random access memory, and is used to store character bitmap information with a smaller occupied space. The first storage unit 102 has a large capacity, and prestores a dot matrix corresponding to information to be scroll-displayed. The display screen 105 corresponds to a matched display memory 104, the display screen 105 displays corresponding display items according to dot matrix data in the display memory 104, and the driver chip processor 107 is used for adjusting the brightness of the display screen 105 or performing setting of other functions. An embodiment of the present application provides a method for driving a display screen, please refer to fig. 2, where the method is applicable to a main control chip of the display screen, so that the main control chip can control the display screen to implement scrolling display of display items, and the method includes:
201. acquiring a plurality of display items;
each display item is a word, symbol or other smaller display item, and a plurality of display items constitute a complete scrolling text or image. Each display item has corresponding dot matrix information, and the display screen can use the dot matrix information to display the corresponding display item.
202. Acquiring character bitmap information;
each display item has corresponding character bitmap information, and the character bitmap information may include several or all of character identification, occupied pixel size, character coding, font library identification and address of dot matrix data buffer area of the corresponding display item. The character bitmap information does not include the dot matrix information of the display item, so that the data size is small and only occupies about 6 bytes.
203. Writing the character bitmap information into a second storage unit;
the character bitmap information obtained in step 102 is written into a second storage unit, typically, the second storage unit is an SRAM built in a main control chip, and the capacity is small, so that only the character bitmap information with a small data size is written therein, and not too much storage space is occupied.
204. Determining a target display item required to be displayed by each scroll screen;
each different display content during the scroll display is referred to as one screen, and a display item in the content displayed in each screen is confirmed. In a possible implementation, a logical page is established according to the pixel size of the display screen, please refer to fig. 3, according to the pixel size corresponding to the display item, the length and width of the occupied pixels of the display item are arranged in the logical page, the first column of the logical page is used as the current starting column, and from the current starting column, several columns are cut back as the first preset length to obtain a segment with the same size as the display screen pixels, where the display item in the segment is the target display item that needs to be displayed at the current time when scrolling is performed. And after the target display item is displayed, the position of the initial column is shifted backwards by a plurality of columns, the number of the shifted-backwards columns is a second preset length, and for example, the initial column is shifted backwards by 5 columns when each screen image displayed in a rolling mode is spaced by 5 pixel points. And intercepting a new segment from the new initial column position again to extract a new target display item in the segment, and enabling the new target display item to be displayed on the screen in a rolling mode until all display items appear on the screen or the initial column moves to the last column of the logic page. It will be appreciated that the manner of scrolling may be other ways, and the examples herein are merely intended to assist those skilled in the art in understanding the present invention.
205. Reading target dot matrix information corresponding to the target display item;
every time a batch of target display items is determined in step 204, the dot matrix information corresponding to the target display items is found in the first storage unit through the character bitmap information. The dot matrix information occupies a large space and is pre-stored in the first storage unit, wherein the first storage unit can be a program memory or a flash memory of the main control chip, and has a larger capacity than the second storage unit. In a possible implementation manner, the dot matrix data corresponding to the target display item can be addressed and read through the character codes, the word stock identifications and the addresses of the dot matrix data buffer area contained in the character bitmap information. In a possible implementation, a dot matrix data buffer is determined in the first storage unit according to the dot matrix data buffer address; and reading target dot matrix information corresponding to the target display item in the dot matrix data buffer area according to the dot matrix identification and the character code.
In a feasible implementation manner, an index file is also prestored in the storage space of the main control chip, the index file records the corresponding relationship between the dot matrix identifier and the character library, the target character library corresponding to the dot matrix identifier of the target display item is determined in the index file according to the dot matrix identifier of the target display item, and the dot matrix information corresponding to the character code of the target display item is acquired from the character library as the target dot matrix information according to the preset corresponding relationship between the character code and the dot matrix information.
Furthermore, the format type of the target display item can be determined according to the font identification corresponding to the display item, and the dot matrix data of different format types exist in different areas of the first storage space, for example, the display item is divided into an image and a character, and the dot matrix information corresponding to the two display items is pre-stored in different areas of the first storage space.
The dot matrix information may be read in another manner, and the corresponding dot matrix information may be found in the first storage area according to the character bitmap information of the target display item and may be read.
206. And writing the target dot matrix information into a display memory of the display screen.
When the dot matrix information is written into the display memory of the display screen, the display screen can display the corresponding display items according to the dot matrix information. And (3) writing the dot matrix information into the display memory of the display screen once to cover the previous display memory data when a batch of target display items are confirmed in the step 204 and the dot matrix information of the target display items is read in the step 205, wherein the blank pixel points are automatically supplemented with 0 when the display memory is filled with the blank pixel points. The display can display corresponding display items according to the change of the dot matrix information in the video memory, thereby achieving the effect of rolling display. The typical usage scenario is that dot matrix information is overwritten in a display memory of a display screen under SPI communication.
The present application also provides a display screen driving apparatus capable of implementing the driving method in the corresponding embodiment of fig. 2, please refer to fig. 5, the apparatus includes
A first acquisition unit 501 for acquiring a plurality of display items;
a second obtaining unit 502, configured to obtain respective character bitmap information of multiple display items, where the display items have corresponding dot matrix information, the dot matrix information is pre-stored in the first storage unit, and the number of bytes of the character bitmap information corresponding to the display items is smaller than that corresponding to the target display item;
a first writing unit 503 for writing the plurality of character bitmap information into the second storage unit;
a determining unit 504, configured to determine, according to a preset scrolling rule, a target display item to be displayed on each scrolling screen from multiple display items;
a reading unit 505, configured to read target dot matrix information corresponding to the target display item from the first storage unit;
and a second writing unit 506, configured to write the target dot matrix information into a memory of the display screen, so that the display screen displays the target display item according to the target dot matrix information.
Further, the determining unit 504 includes:
the first determining module is used for determining the pixel size of the display screen;
and the second determining module is used for respectively and sequentially determining the display items of which the total pixel size accords with the pixel size of the display screen according to the arrangement sequence of the display items, and the display items are used as target display items to be displayed on each scroll screen.
Further, the determining unit 504 includes:
the arrangement module is used for arranging the display items in the logic page according to the arrangement sequence of the display items;
the intercepting module is used for taking a first pixel column of the logic page as a current starting column and intercepting a page segment with a first preset length from the logic page;
the third determining module is used for determining the display items included in the page fragment as target display items to be displayed by the scroll screen;
and the backward moving module is used for moving the current starting column backward by a second preset length and returning to the step of intercepting the page segment with the first preset length from the logic page until the current starting column moves to the tail pixel column of the logic page or all the display items are determined as target display items.
The present application also provides another display panel driving apparatus 600, the structure of which is shown in fig. 6, including: the display screen driving apparatus includes a processor 601, a first memory 602, a second memory 603, and an output interface 604, where the first memory 602 is a flash memory or a program memory, the second memory 603 may be a data memory, an object program is stored in the first memory 602, and the output interface 504 is connected to the display screen, and when the object program in the first memory 602 is executed by the processor 601, the display screen driving apparatus is enabled to implement the display screen driving method corresponding to fig. 2, and a specific form of the apparatus may be a main control chip built in the display screen.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various other media capable of storing program codes.
Claims (10)
1. A display screen driving method is characterized by being applied to a main control chip for driving a display screen, and the method comprises the following steps:
acquiring a plurality of display items;
acquiring respective character bitmap information of a plurality of display items, wherein the display items have corresponding dot matrix information, the dot matrix information is pre-stored in a first storage unit, and the byte number of the character bitmap information corresponding to the display items is smaller than that of the dot matrix information corresponding to the target display item;
writing a plurality of the character bitmap information into a second storage unit;
determining a target display item required to be displayed by each rolling screen from the plurality of display items according to a preset rolling display rule;
reading target dot matrix information corresponding to the target display item from the first storage unit;
and writing the target dot matrix information into a display memory of a display screen so that the display screen displays the target display item according to the target dot matrix information.
2. The display screen driving method according to claim 1, wherein the character bitmap information comprises: a pixel size of the display item;
the method for determining the target display item required to be displayed by each scroll screen from the plurality of display items according to the preset scroll display rule comprises the following steps:
determining a pixel size of the display screen;
and according to the arrangement sequence of the display items, respectively and sequentially determining the display items of which the sum of the pixel sizes accords with the pixel size of the display screen as target display items to be displayed on each scroll screen.
3. The method for driving a display panel according to claim 1, wherein the sequentially determining, according to the arrangement order of the plurality of display items, the display items whose total pixel size is consistent with the pixel size of the display panel as the target display items to be displayed on each scroll panel comprises:
arranging the display items in a logical page according to the arrangement sequence of the display items;
taking a first pixel column of the logic page as a current starting column, and intercepting a page segment with a first preset length from the logic page;
determining the display items included in the page fragment as target display items to be displayed by a scroll screen;
and moving the current starting column backwards by a second preset length, and returning to the step of cutting a page segment with the first preset length from the logic page until the current starting column is moved to the tail pixel column of the logic page or all the display items are determined as target display items.
4. The display screen driving method according to claim 1, wherein the character bitmap information comprises: displaying a font library identification of the item;
the reading of the target dot matrix information corresponding to the target display item from the first storage unit includes:
determining the format type of the target display item according to the word stock identification;
determining a target data set corresponding to the format type of the target display item according to a preset corresponding relation between the format type and the data set; wherein the target data set is stored in a first storage unit;
and reading target dot matrix information corresponding to the target display item from the target data set.
5. The display screen driving method according to claim 1, wherein the character bitmap information includes dot matrix identification, character encoding, and dot matrix data buffer addresses;
the reading of the target dot matrix information corresponding to the target display item from the first storage unit includes:
determining a dot matrix data buffer area in the first storage unit according to the dot matrix data buffer area address; and reading target dot matrix information corresponding to the target display item in the dot matrix data buffer area according to the dot matrix identification and the character code.
6. The display panel driving method according to claim 5,
reading the target dot matrix information corresponding to the target display item in the dot matrix data buffer area according to the dot matrix identifier and the character code, wherein the reading comprises the following steps:
acquiring a pre-established index file, wherein the index file records the corresponding relation between dot matrix identifications and a word stock; determining a target word stock corresponding to the dot matrix identifier of the target display item in the index file according to the dot matrix identifier of the target display item; the target word stock stores lattice information;
and acquiring the dot matrix information corresponding to the character codes of the target display items from the target word stock as target dot matrix information according to the preset corresponding relation between the character codes and the dot matrix information.
7. A display screen driving apparatus, comprising:
a first acquisition unit configured to acquire a plurality of display items;
the second acquisition unit is used for acquiring the character bitmap information of each display item, wherein the display items have corresponding dot matrix information, the dot matrix information is stored in the first storage unit in advance, and the byte number of the character bitmap information corresponding to the display items is smaller than that of the dot matrix information corresponding to the target display item;
a first writing unit configured to write a plurality of the character bitmap information into a second storage unit;
the first confirming unit is used for determining a target display item required to be displayed by each rolling screen from the plurality of display items according to a preset rolling display rule;
the reading unit is used for reading the target dot matrix information corresponding to the target display item from the first storage unit;
and the second writing unit is used for writing the target dot matrix information into a display memory of a display screen so that the display screen displays the target display item according to the target dot matrix information.
8. The display screen driving apparatus according to claim 7,
the character bitmap information includes: a pixel size of the display item;
the determination unit includes:
the first determining module is used for determining the pixel size of the display screen;
and the second determining module is used for respectively and sequentially determining the display items of which the total pixel size accords with the pixel size of the display screen according to the arrangement sequence of the display items, and the display items are used as target display items to be displayed by each rolling screen.
9. The display screen driving apparatus according to claim 7,
the determination unit includes:
the arrangement module is used for arranging the display items in a logic page according to the arrangement sequence of the display items;
the intercepting module is used for taking a first pixel column of the logic page as a current starting column and intercepting a page segment with a first preset length from the logic page;
the third determining module is used for determining the display items included in the page fragment as target display items to be displayed by the scroll screen;
and the backward moving module is used for moving the current starting column backward by a second preset length and returning to the step of cutting out the page segment with the first preset length from the logic page until the current starting column moves to the last pixel column of the logic page or all the display items are determined as target display items.
10. A display driving apparatus, comprising a processor, a first memory, a second memory and an output interface, wherein the first memory is a flash memory or a program memory, the second memory is a data memory, the first memory stores an object program, the output interface is connected to a display, and when the object program in the first memory is executed by the processor, the display driving method as claimed in claims 1 to 6 is implemented.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112287253A (en) * | 2020-10-28 | 2021-01-29 | 张家港市爱上旅途网络科技有限公司 | Information display method and system |
| CN113553526A (en) * | 2021-08-11 | 2021-10-26 | 北京字跳网络技术有限公司 | Data display method, device and equipment |
| CN113948037A (en) * | 2020-10-19 | 2022-01-18 | 深圳匠明科技有限公司 | Data processing method, device and system, LED driving chip and controller |
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| CN113553526A (en) * | 2021-08-11 | 2021-10-26 | 北京字跳网络技术有限公司 | Data display method, device and equipment |
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