CN114510208B - Text display position control method and system for OLED - Google Patents

Abstract

The invention provides a text display position control method and system for OLED, and relates to the technical field of electrical digital data processing applied to display panels. The present invention considers the importance of each part of the text content to be displayed, that is, the display weight, and selects an appropriate target display area for each text segment based on the display weight, and can use a display partition with low aging degree on the premise of not omitting important content To display the content, it avoids the aging problem caused by long-term display in some areas, thereby avoiding the occurrence of screen burn-in.

Description

Text display position control method and system for OLED

technical field

The invention relates to the technical field of electrical digital data processing applied to display panels, in particular to a text display position control method and system for OLEDs.

Background technique

OLED (Organic Light-Emitting Diode), also known as organic electric laser display, organic light-emitting semiconductor (Organic Electroluminescence Display, OLED). The biggest highlight of OLED is that each pixel is self-illuminating, which can improve the display effect. However, due to the different light-emitting time of each pixel in use, the loss speed of the organic compound film on the surface of the pixel is different. Some pixels continue to emit light for a long time, and the natural decay rate is fast. Known as burn-in. For example, due to the limitation of size and power consumption of smart watches, OLED displays are basically used. However, due to the requirement of smart watches to display text information such as time and date for a long time, such as the AlwaysOn Display function, the display on smart watches has become increasingly difficult. Increased risk of screen burn-in.

At present, in order to solve the problem of screen burn-in of devices using OLED technology such as smart watches, most of the methods adopted by various companies are to reduce the difference in loss by reducing the display brightness. However, due to the use characteristics of smart watches, the display effect of reducing the brightness outdoors is poor, which cannot meet the needs of users.

SUMMARY OF THE INVENTION

(1) Technical problems solved

In view of the deficiencies of the prior art, the present invention provides a text display position control method and system for OLED, which solves the problem that the current solution to avoid screen burn-in by reducing display brightness cannot meet the actual needs of users.

(2) Technical solutions

To achieve the above purpose, the present invention is achieved through the following technical solutions:

A first aspect provides a text display position control method for OLED, the method comprising:

The display area is rasterized, and each grid corresponds to a display area containing several pixels;

Classification of display partitions based on the age of each display partition;

Based on the position of each low-aging-level display partition in the display area, a number of rectangular areas are divided, and each of the rectangular areas is used as a candidate display area;

Perform word segmentation on the text to be displayed to obtain several text fragments; and based on preset rules, obtain text fragment information;

Based on the text segment information, the candidate display area corresponding to each text segment is selected as the target display area.

Further, the number of horizontal and vertical pixels of each grid is the same, and the display brightness is a fixed value.

Further, classifying the display partitions based on the aging degree of each display partition includes:

When each display partition is displayed, count the duration to obtain the total display duration of the display partition;

Sort the display partitions in descending order of the total display duration, obtain the first n display partitions as display partitions with a medium aging degree, and calculate their average total display duration t1;

The value of t1-t2 is used as the division standard of medium aging degree and low aging degree, and the remaining display partitions are classified to obtain display partitions with medium aging degree and low aging degree.

Wherein, t2 represents a preset time interval, and n is a preset positive integer.

Further, according to the position of each low-aging-level display partition in the display area, several rectangular areas are divided, and each of the rectangular areas is used as a candidate display area, including:

Denote the display partition with low aging degree as 1, and the display partition with medium aging degree and high aging degree as 0; obtain a binarized image representing the aging degree of the display partition;

extracting the edge image of the binarized image to obtain several closed polygons;

Obtain the largest rectangular area in the horizontal direction embedded in each polygon, and use the rectangular area corresponding to each polygon as an alternative display area.

Further, the text segment information includes at least the number of characters of the text segment and the corresponding display weight;

When the text to be displayed is date information, the preset rule is: each number and character is 1 character, and the display weights are year, month, and day in order from low to high;

When the text to be displayed is time information, the preset rule is: each number and text is 1 character, and the display weights are hours, minutes, and seconds in order from low to high.

Further, selecting the candidate display area corresponding to each text fragment based on the text fragment information as the target display area, including:

Get the optional character size and the number of grids occupied by a single character corresponding to each character size;

Determine the character size of each text fragment based on the display weight, and obtain the required number of grids for each text fragment under the corresponding character size;

The candidate display area corresponding to each text segment is determined as the target display area based on the required number of grids of each text segment, the priority principle of display weight and the priority principle of grid utilization.

Further, the type of character size is the same as the number of text fragments, and the number of grids occupied by a single character corresponding to each character size is in an integer multiple relationship.

Further, determining the candidate display area corresponding to each text fragment as the target display area based on the required grid quantity of each text fragment, the display weight priority principle and the grid utilization priority principle, including:

Filter out eligible candidate display areas based on the display weight priority principle and the required number of grids of text fragments;

The display weight priority principle is: sort the text fragments in descending order of display weight, and after the text fragment at the top of the sorting determines the target display area, then determine the target display area for the text fragment at the back of the sorting;

The eligible candidate display area is: the size of the internal grid can completely display the candidate display area of the text fragment;

The grid utilization priority principle is: if there are multiple candidate display areas that meet the conditions, the candidate display area with the largest grid utilization rate is selected as the target display area;

The grid utilization rate is the ratio of the number of grids used for displaying characters in the target display area to the number of grids in the target display area.

Further, if the number of the remaining candidate display areas is not greater than the text fragments of the undetermined target display area, the grid of the displayed characters in the determined target display area is deleted from the display area with low aging degree, and the updated display area is obtained. A display partition with a low aging degree, and based on the updated display partition with a low aging degree, an updated candidate display area is obtained, and a target display area of the next text segment is obtained based on the updated candidate display area.

In a second aspect, there is provided a text display position control system for an OLED, the system comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer The program implements the steps of the above method.

(3) Beneficial effects

The invention provides a text display position control method and system for OLED. Compared with the prior art, it has the following beneficial effects:

In the present invention, the display area is rasterized, so that each grid corresponds to a display subregion containing several pixels, and then the display subregions are classified based on the aging degree of each display subregion, and then the display subregions with low aging degree are displayed in the display region. The position in the area determines the candidate display area. At the same time, the text to be displayed is segmented to obtain several text fragments, and based on the preset rules, the text fragment information is obtained; finally, the candidate display area corresponding to each text fragment is selected based on the text fragment information. as the target display area. The present invention considers the importance of each part of the text content to be displayed, that is, the display weight, and selects an appropriate target display area for each text segment based on the display weight, and can use display partitions with low aging degree on the premise of not omitting important content To display the content, it avoids the aging problem caused by long-term display in some areas, thereby avoiding the occurrence of screen burn-in.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a flowchart of an embodiment of the present invention;

FIG. 2 is a schematic diagram of rasterization of a display area according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the principle of obtaining an alternative display area according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a grid for displaying characters and a grid for not displaying characters in a target display area according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiments of the present application provide a text display position control method and system for OLED, which solves that the current solution of preventing screen burn-in by reducing display brightness cannot meet the actual needs of users.

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1:

As shown in FIG. 1, the present invention provides a text display position control method for OLED, the method comprising:

The display area is rasterized, and each grid corresponds to a display area containing several pixels;

Classification of display partitions based on the age of each display partition;

Based on the position of each low-aging-level display partition in the display area, a number of rectangular areas are divided, and each of the rectangular areas is used as a candidate display area;

Perform word segmentation on the text to be displayed, obtain several text fragments, and obtain text fragment information based on preset rules;

Based on the text segment information, the candidate display area corresponding to each text segment is selected as the target display area.

The beneficial effects of this embodiment are:

In the embodiment of the present invention, the display area is rasterized, so that each grid corresponds to a display partition containing several pixels, and then the display partitions are classified based on the aging degree of each display partition, and then the display partitions with low aging degree are then classified. The position in the display area is used to determine the candidate display area. At the same time, the text to be displayed is segmented to obtain several text fragments, and based on the preset rules, the text fragment information is obtained; finally, the candidate corresponding to each text fragment is selected based on the text fragment information. The display area serves as the target display area. The present invention considers the importance of each part of the text content to be displayed, that is, the display weight, and selects an appropriate target display area for each text segment based on the display weight, and can use display partitions with low aging degree on the premise of not omitting important content To display the content, it avoids the aging problem caused by long-term display in some areas, thereby avoiding the occurrence of screen burn-in.

The implementation process of the embodiment of the present invention is described in detail below:

S1. The display area is rasterized, and each grid corresponds to a display partition including several pixels.

Taking the display screen of a smart watch as an example, as shown in Figure 2, the display area can be gridded according to preset rules. The square area formed by each dotted line in the figure is a grid, with a total of W1*H1 grids , each grid contains W2*H2 pixels.

Assuming that the pixels of the watch screen are 320*300, and the horizontal and vertical pixels of each grid are the same, that is, W2=10 pixels, H2=10 pixels, then W1=32, H1=30, that is, there are 32*30 grids in total.

, Display partition classifications based on the age of each display partition.

S2.1. Under the premise of a certain display brightness, the total duration of pixel light emission is an important parameter that affects pixel aging. Therefore, it can be timed every time the display area is displayed, and the total usage time of the display area can be obtained by accumulating;

S2.2. Sort the display partitions in descending order of the total display duration, calculate the average total display duration t1 of the first n display partitions, and record the aging degree of these display partitions as high; in specific implementation, n/N ≥ 10 %, where N is the total number of display partitions, namely W1*H1.

S2.3. Use the value of t1-t2 as the standard for dividing the medium aging degree and the low aging degree, and classify the remaining display partitions to distinguish the display partitions with the medium aging degree and the low aging degree, where t2 represents the preset The time interval is an empirical value, which is related to the screen material and the default display brightness, and is preset manually. The value of t1-t2 is a dynamically changing value, which is related to the current degree of aging.

. Based on the position of each low-aging-level display partition in the display area, a number of rectangular areas are divided, and each of the rectangular areas is used as a candidate display area.

S3.1. Record the display partition with low aging degree as 1, and the display partition with medium aging degree and high aging degree as 0; then the display partition can be converted into a binarized image;

S3.2, extracting the edge image of the binarized image to obtain several closed polygons;

In addition, if there are other polygons B inside a certain polygon A, the number of display partitions occupied by polymorph B is calculated. If it is less than the preset threshold, if the number is less than 2, only polygon A is retained and polygon B is eliminated.

S3.3. Using the existing algorithm for finding the largest rectangle in the horizontal direction inside an arbitrary polygon, a largest rectangle (solid line part) embedded in the polygon as shown in Figure 3 can be obtained, and the rectangular area is used as a backup The selected display area can be recorded as S=W3*H3, where W3 represents the number of grids corresponding to the width of the candidate display area, and H3 represents the number of grids corresponding to the height of the candidate display area.

, perform word segmentation on the text to be displayed, obtain several text fragments, and obtain text fragment information based on preset rules. The text segment information includes at least the number of characters of the text segment and the corresponding display weight.

Taking the date display common in smart watches as an example, assuming that the text to be displayed is yyyy year mm month dd day, the existing word segmentation technology can be used to divide three text segments, namely "yyyy year", "mm month" and "dd day", the text fragment information of "yyyy year" can be {5, 0, 1}, where 5 represents the number of characters in the text fragment, and 0 represents the type of the text fragment is year (its value can be 0, 1, 2, represent year, month, day respectively), 1 represents the display weight corresponding to the year (the value of the display weight can be 1, 2, 3, the larger the value, the more important the information is, and it needs to be displayed first. According to the requirements, the lowest display weight of the year can be 1, the next display weight of the month is 2, and the highest display weight of the day can be 3).

For another example, take the common time display in smart watches as an example, assuming that the text to be displayed is hh:mm:ss, then three text segments can be divided, namely "hh", "mm" and "ss", then "mm" The text fragment information of can be {2, 1, 3}, where 2 represents the number of characters, 1 represents the type of the text fragment is minutes (the value can be 0, 1, 2, representing hours, minutes, seconds, respectively), 2 Indicates the display weight corresponding to the minute (the value of the display weight can be 1, 2, 3, the larger the value, the more important the information is, and it needs to be displayed first. The display weight of 2 is 2, and the display weight of seconds is 1).

Obviously, different types of to-be-displayed texts can be matched by setting a variety of preset rules, so as to improve the scope of application of this embodiment.

After the weight and character content of each text fragment are determined, candidate display areas corresponding to the number of text fragments need to be screened from several candidate display areas, so as to display the content of the text fragments in the candidate display areas correspondingly. However, when selecting an alternative display area, it is also necessary to consider the relationship between the display weight and the size of the display area, so that content with a large display weight is easier to see. therefore:

S5. Select the candidate display area corresponding to each text segment as the target display area based on the text segment information.

S5.1. Obtain the optional character size and the number of grids occupied by a single character corresponding to each character size; for example, three character sizes of large, medium and small are preset in the device. Each character occupies 1 grid; in medium character size, each character occupies 2*2 grids, and in large character size, each character occupies 3*3 grids.

S5.2. Determine the character size of each text fragment based on the display weight, and obtain the required number of grids of each text fragment under the corresponding character size.

Since important information needs to be better displayed, the larger the display weight of the text fragment, the larger the character size used.

Taking the common date display in smart watches as an example, assuming that the text to be displayed is January 23, 2001, and the text fragment "23" has the highest display weight, the character size used is large and contains 3 characters "2" , "3", and "Day". Then you can calculate the grid required to display "23rd" under the large character size, that is, under the large character size, the required grid is 3*3+3*3+3*3=9*3;

Similarly, under the medium character size of "January", the required grid is 2*2+2*2+2*2=8*2; under the small character size of "2001", the required grid is 1*1+1*1+1*1+1*1+1*1=5*1.

Obviously, the optional character size is determined by the device system settings, and there may be more optional sizes, as long as the display weight of the text segment is larger, the larger the character size used.

S5.3. Determine the candidate display area corresponding to each text segment as the target display area based on the required number of grids of each text segment, the display weight priority principle and the grid utilization priority principle.

S5.3.1. First, based on the priority principle of display weight and the required number of grids of the text segment, the eligible candidate display areas are screened out;

The eligible candidate display areas are: the candidate display areas in which the size of the internal grid can completely display the text segment. Specifically, according to actual needs, the text segment can be further split, for example, "23rd" can be further divided into "23" and "day", so that the required grid is composed of an original "9*3" The rectangular area is converted into an area composed of a "6*3" rectangle and a "3*3" rectangle to adapt to more alternative display areas and improve pixel utilization. The display weight priority principle is as follows: the text segments are sorted in descending order of display weight, and after the text segment at the top of the sorting determines the target display area, the text segment at the bottom of the sorting is then determined as the target display area.

In addition, for the situation where there are multiple candidate display areas that meet the conditions, the following steps may also be included:

S5.3.2. If there are multiple candidate display areas that meet the conditions, based on the grid utilization priority principle, the candidate display area with the largest grid utilization rate is selected as the target display area.

In addition, in order to further utilize the alternative display area, the following steps may also be included:

S5.3.3. If the number of the remaining candidate display areas is not larger than the text segments for which the target display area is not determined, then before acquiring the target display area of the next text segment, the grid of the displayed characters in the determined target display area will be Delete from the display partition with low aging degree to update the display partition with low aging degree, and then execute S3 again to obtain a new candidate display area, so that the selection of the next target display area can be obtained based on the updated candidate display area. of.

For example, as shown in Figure 4, displaying "23rd" requires a grid of "9*3", and the alternative display area is a grid of "9*5", then there is a grid for displaying characters (shaded part) and the grid with no characters displayed, which may be used for the display of the next text fragment. Likewise, the grid utilization rate is the ratio of the number of grids used for displaying characters in the target display area to the number of grids in the target display area.

Example 2

The present invention also provides a text display position control system for an OLED, the system includes a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the computer program When implementing the steps of the following method:

The display area is rasterized, and each grid corresponds to a display area containing several pixels;

Classification of display partitions based on the age of each display partition;

Based on the position of each low-aging-level display partition in the display area, a number of rectangular areas are divided, and each of the rectangular areas is used as a candidate display area;

Perform word segmentation on the text to be displayed, obtain several text fragments, and obtain text fragment information based on preset rules;

Based on the text segment information, the candidate display area corresponding to each text segment is selected as the target display area.

It is understandable that the text display position control system for OLEDs provided by the embodiments of the present invention corresponds to the above-mentioned text display position control method for OLEDs, and the explanations, examples, beneficial effects and other parts of the relevant contents can be referred to for The corresponding content in the text display position control method of the OLED will not be repeated here.

To sum up, compared with the prior art, the present invention has the following beneficial effects:

In the present invention, the display area is rasterized, so that each grid corresponds to a display subregion containing several pixels, and then the display subregions are classified based on the aging degree of each display subregion, and then the display subregions with low aging degree are displayed in the display region. The position in the area determines the candidate display area. At the same time, the text to be displayed is segmented to obtain several text fragments, and based on the preset rules, the text fragment information is obtained; finally, the candidate display area corresponding to each text fragment is selected based on the text fragment information. as the target display area. The present invention considers the importance of each part of the text content to be displayed, that is, the display weight, and selects an appropriate target display area for each text segment based on the display weight, and can use display partitions with low aging degree on the premise of not omitting important content To display the content, it avoids the aging problem caused by long-term display in some areas, thereby avoiding the occurrence of screen burn-in.

It should be noted that, from the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products, which can be stored in storage media, such as ROM/RAM, magnetic disks, and optical disks. etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or portions of embodiments. In this document, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such existence between these entities or operations. The actual relationship or sequence. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A text display position control method for an OLED, the method comprising:

rasterizing a display area, wherein each grid corresponds to a display subarea containing a plurality of pixels;

classifying the display sections based on the degree of aging of each display section;

dividing a plurality of rectangular areas based on the positions of the display subareas with low aging degrees in the display area, wherein each rectangular area is used as an alternative display area;

performing word segmentation on a text to be displayed to obtain a plurality of text segments; obtaining text segment information based on a preset rule;

selecting an alternative display area corresponding to each text fragment as a target display area based on the text fragment information;

the selecting, based on the text segment information, the alternative display area corresponding to each text segment as the target display area includes:

acquiring optional character sizes and the number of grids occupied by the single characters corresponding to each character size;

determining the character size of each text segment based on the display weight, and acquiring the number of grids required by each text segment under the corresponding character size;

determining an alternative display area corresponding to each text segment as a target display area based on the required grid number, the display weight priority principle and the grid utilization rate priority principle of each text segment;

the character size type is the same as the number of the text segments, and the number of grids occupied by the single characters corresponding to each character size is in integer multiple relation;

the determining, based on the number of grids needed for each text segment, the display weight priority rule, and the grid utilization priority rule, that the alternative display area corresponding to each text segment is used as the target display area includes:

screening out candidate display areas meeting the conditions based on a display weight priority principle and the required number of grids of the text segments;

the display weight priority principle is as follows: the text segments are sorted in descending order according to the display weight, and after the text segment which is sorted at the front determines the target display area, the target display area is determined for the text segment which is sorted at the back;

the eligible candidate display areas are: the size of the internal grid can completely display the alternative display area of the text fragment;

the grid utilization rate priority principle is as follows: if a plurality of candidate display areas meeting the conditions exist, selecting the candidate display area with the maximum grid utilization rate as a target display area;

the grid utilization rate is the ratio of the number of grids used for displaying characters in the target display area to the number of grids in the target display area;

and if the number of the remaining alternative display areas is not larger than the number of the text segments of the undetermined target display area, deleting the grids displaying the characters in the determined target display area from the display subareas with low aging degree to obtain updated display subareas with low aging degree, obtaining updated alternative display areas based on the updated display subareas with low aging degree, and acquiring the target display area of the next text segment based on the updated alternative display areas.

2. The text display position control method for the OLED according to claim 1, wherein the number of horizontal and vertical pixels of each grid is the same, and the display luminance is a fixed value.

3. The text display position control method for an OLED according to claim 1, wherein said classifying the display sections based on the degree of aging of each display section includes:

counting the time length when each display partition is displayed to obtain the total display time length of the display partitions;

sorting the display partitions in a descending order according to the total display duration, acquiring the first n display partitions as the display partitions of the middle aging degree, and calculating the average total display duration t 1;

taking the values of t1-t2 as the dividing standard of the middle aging degree and the low aging degree, and classifying the rest display subareas to obtain a display subarea with the middle aging degree and a display subarea with the low aging degree;

where t2 represents a preset time interval, and n is a preset positive integer.

4. The text display position control method for the OLED according to claim 1, wherein the dividing a plurality of rectangular regions based on the positions of the respective low-aging display sections in the display region, each of the rectangular regions serving as a candidate display region, comprises:

marking the display subarea with low aging degree as 1, and marking the display subareas with medium aging degree and high aging degree as 0; obtaining a binary image representing the aging degree of the display subarea;

extracting an edge image of the binary image to obtain a plurality of closed polygons;

and acquiring the maximum rectangular area in the horizontal direction embedded in each polygon, and taking the rectangular area corresponding to each polygon as a candidate display area.

5. The text display position control method for the OLED according to claim 1, wherein the text segment information includes at least a number of characters of the text segment and a corresponding display weight;

when the text to be displayed is date information, the preset rule is as follows: each number and character is 1 character, and the display weight is year, month and day from low to high;

when the text to be displayed is time information, the preset rule is as follows: each number and character is 1 character, and the display weight is from low to high in sequence time, minute and second.

6. A text display position control system for an OLED, the system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1 to 5 when executing the computer program.

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