CN113645493A - Display method for vertical scrolling of characters - Google Patents
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- CN113645493A CN113645493A CN202010332158.4A CN202010332158A CN113645493A CN 113645493 A CN113645493 A CN 113645493A CN 202010332158 A CN202010332158 A CN 202010332158A CN 113645493 A CN113645493 A CN 113645493A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000001960 triggered effect Effects 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000011159 matrix material Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/24—Generation of individual character patterns
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/30—Control of display attribute
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/34—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators for rolling or scrolling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Graphics (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a display method for vertical scrolling of characters, and relates to the technical field of character display and dynamic display. The method comprises a timer and text position offset, wherein the timer specifies a timing interval, the timer is triggered once every interval, so that continuous refreshing display and erasure of the text in a window are realized, the text position offset is added to a text display position value when the timer is executed every time, and thus, the text display position is added with one offset every time the timer is executed, and the text movement is visually observed. Compared with the prior art, the text vertical scrolling display method introduces a text display refreshing time interval and a position offset when the text display is refreshed each time, and the two items control the speed of the text scrolling display and whether the text is stuck or not, so that the controllable text scrolling display is realized, and the method has better market popularization value.
Description
Technical Field
The invention relates to the technical field of character display and dynamic display, in particular to a character vertical scrolling display method.
Background
With the rapid development of multimedia playing, texts are smoothly and dynamically displayed on a multimedia display window, the requirements for controlling the scrolling speed and the display style during the dynamic display of the texts are becoming stronger, bullet screen display in a video playing scene, display of passenger information system sites, news, bulletins and the like in rail transit, caption display in outdoor multimedia playing and other scenes are required to be more customized, and a single text display mode or a text display mode with uncontrollable speed style cannot meet the requirements.
The method is a method for scrolling and displaying characters in the vertical direction, wherein the display duration, the scrolling speed and the smoothness of character display during scrolling can be manually controlled, and the method is a simple and effective character vertical scrolling and displaying method, and the prior patent documents comprise: chinese patent application No. 01107461.2 discloses "high speed encryption and decryption method for packet encryption chip and data" and us patent No. 6477646 "Security chip architecture and encryption acceleration implementation method".
The method for scrolling characters in Chinese patent network publication patent CN101662616A includes the following steps: 1) acquiring the number of characters which can be displayed in a character display area of a screen; 2) setting a character display window, wherein the length of the character display window is the sum of 1 of the number of characters which can be displayed in a character display area of the screen; the initial position of the character display window is aligned with the initial position of the character string to be displayed; 3) converting characters in a current character display window into pixel dot matrix data; 4) reading pixel dot matrix data into a cache, and then sending the pixel dot matrix data into a display channel to display a pixel dot matrix of a character string in the current cache, wherein the pixel dot matrix rolls in a character display area of the screen at the speed of K rows of pixels each time; 5) judging whether the display of the character string to be displayed is finished or not, if not, moving a character backwards by the character display window, releasing the cache, and returning to the step 3); otherwise, the display of the character string is finished. The invention has the advantages of high efficiency and low complexity, is particularly suitable for an embedded system, and has the following defects in the Chinese patent application No. 101662616A: the invention provides a method for horizontally scrolling characters, which does not relate to vertical scrolling, and secondly, in the implementation of the patent, the patent has no control description of the speed of scrolling the characters and no solution for blocking the characters during scrolling, and only proposes that the characters horizontally scroll in a display area.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a display method for vertical scrolling of characters, which has the advantages of total text display time, text scrolling speed and controllable incarceration during scrolling elimination.
In order to achieve the purpose, the invention provides the following technical scheme: a display method for vertically scrolling characters, which comprises a timer and a text position offset, wherein the timer designates a timing interval, the timer is triggered once every interval so as to realize continuous refreshing display and erasure of the text in a window, the text position offset is added above a text display position value when the timer is executed each time, and the method comprises the following steps:
s1, acquiring variable definitions of a character display area of a screen, and judging the sizes of the total pixel width and the display frame width of the text;
s2, according to the numerical values of the total pixel width and the display frame width of the text judged in the step S1, a formula is deduced, and the display position of the text is set as the lower boundary of the display frame;
s3, starting a timer to refresh the text;
s4, after the text is refreshed in the step S3, the offset is added to the position of the refreshed text each time;
and S5, judging whether the total pixel width of the text is less than or equal to the width of the display frame according to the step S1, if so, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel, and if not, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel plus the number of lines of the text.
In step S1, the height of the text display box is h1, the width of the text display box is w1, the height of the text pixel is h2, the total width of the text pixel is w2, the time required for completing the text display is t, the refresh interval time of the timer is t1, the vertical displacement during each refresh is offset, the total number of text scrolling lines is n, and the total displacement for completing the text scrolling is h.
In step S2, when the total pixel width of the text is less than or equal to the display frame width, the number of lines of the text is ═ 1 (total width of the text/width of the display frame) +1, and then the text display position is set as the lower boundary of the display frame.
Further optimizing the technical solution, in step S2, the formula is derived: n is (w1/w2) +1, h is h2 n + h1, the roll-up of the total displacement h is completed, the total required refresh number counts is h/offset, the roll-up of the characters of the total displacement h is completed, and the total required time t is counts t 1.
Further, the present invention is optimized, where h is h2 × n + h1 ═ h2 ((w1/w2) +1) + h1, h is counts offset ═ t offset)/t1, and from the above two formulae, (t offset)/t1 ═ h2 ((w1/w2) +1) + h1, and the offset is set to the right of the equal sign to derive t/t1 ═ h2 ((w1/w2) +1) + h 1)/offset.
Further optimizing the technical scheme, the formula explains that: the left side of the equal sign is interpreted as: the total display time is divided by the character refreshing time interval and is equal to the total refreshing times after the characters are displayed;
further optimizing the technical scheme, the formula explains that: the equal sign right is interpreted as: multiplying the height of the text to be displayed by the total line number of the text to be displayed, wherein the sum of the height of the text display box is the total height required by the completion of the text scrolling; the result is the total number of refreshes required, and the result of the equation on both sides of the equal sign refers to the total number of refreshes required for completing the text scrolling.
Further optimizing the technical scheme, the timer executes the interval t1, can be manually assigned, and then manually assigns the offset, so that the text can be controlled to roll.
Further optimizing the technical scheme, when the text position offset is executed each time by the timer, the text display position is added with an offset, and characters are visually moved.
Further optimizing the technical scheme, the total time t required by the character display completion is known, the height h2 of the character to be displayed is known, the total length w2 of the character and the length w1 of the display frame are known, and the height h1 of the display frame is known, so that only the refresh interval t1 and the refresh offset are unknown in the formula.
Compared with the prior art, the invention provides a display method for vertical scrolling of characters, which has the following beneficial effects:
compared with the prior art, the text vertical scrolling display method introduces a text display refreshing time interval and a position offset when the text display is refreshed each time, and the two items control the speed of the text scrolling display and whether the text is stuck or not, so that the controllable text scrolling display is realized, and the method has better market popularization value.
Drawings
Fig. 1 is a schematic view of a work flow of a display method for vertically scrolling characters according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Referring to fig. 1, the present invention discloses a method for displaying vertical scrolling of characters, including a timer and a text position offset, where the timer specifies a timing interval, and each interval timer is triggered once, so as to implement continuous refreshing display and erasure of a text in a window, and the text position offset increases the offset to a text display position value when the timer is executed each time, so that each time the timer is executed, the text display position increases an offset, and visually shows that characters move, including the following steps:
s1, acquiring variable definitions of a character display area of a screen, and judging the sizes of the total pixel width and the display frame width of the text;
s2, according to the numerical values of the total pixel width and the display frame width of the text judged in the step S1, a formula is deduced, and the display position of the text is set as the lower boundary of the display frame;
s3, starting a timer to refresh the text;
s4, after the text is refreshed in the step S3, the offset is added to the position of the refreshed text each time;
and S5, judging whether the total pixel width of the text is less than or equal to the width of the display frame according to the step S1, if so, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel, and if not, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel plus the number of lines of the text.
Example (b): a display method for vertically scrolling characters,
step S1 variables define: the height of a text display box is h1, the width of the text display box is w1, the height of a text pixel is h2, the total width of the text pixels is w2, the time required by the completion of the text display is t, the refresh interval time of a timer is t1, the displacement amount in the vertical direction during each refresh is offset, the total line number of the text scrolling is n, and the total displacement of the text scrolling completion is h;
step S2 formula derivation: n ═ (w1/w2) + 1; h-h 2 n + h1
Finishing the rolling of the total displacement h, and the total required refreshing time count is h/offset
The scrolling of the total displacement h text is completed, and the total time t is count t1, so:
h＝h2*n+h1＝h2*((w1/w2)+1)+h1
h＝counts*offset＝(t*offset)/t1
(t x offset)/t1 ═ h2 ((w1/w2) +1) + h1, which can be obtained from the above two formulae
The offset is put to the right of the equal sign to derive t/t1 ═ h2 ((w1/w2) +1) + h 1)/offset;
step S3 formula interpretation: the left side of the equal sign is interpreted as: the total display time is divided by the character refreshing time interval and is equal to the total refreshing times after the characters are displayed; the equal sign right is interpreted as: multiplying the height of the text to be displayed by the total line number of the text to be displayed, wherein the sum of the height of the text display box is the total height required by the completion of the text scrolling; then dividing the offset of the text in each character refreshing process to obtain the total number of times of refreshing; the result of the equal-sign two-sided equation refers to the total number of refreshes required for the text scrolling to complete.
Step S4 uses the method: the total time t needed by the completion of the text display is known, the height h2 of the text to be displayed is known, the total length w2 of the text and the length w1 of the display frame are known, and the height h1 of the display frame is known, so that only the refresh interval t1 and the refresh offset are unknown in the formula, a timer is started, the timer executes that the interval t1 can be manually assigned, then the offset is manually assigned, and the scrolling of the text can be controlled.
the larger t1, the slower the refresh, and the larger offset, the more text moves per refresh, which appears to be text scrolling on a beat;
the larger t1, the slower the refresh, the smaller the offset, the less text moves per refresh, and the text appears to scroll very slowly, even nearly motionless;
the smaller t1, the faster the refresh, the larger offset, the more text moves per refresh, the more text appears to scroll very fast, and the click-through feeling is obvious;
the smaller t1, the faster the refresh, the smaller offset, the less text moves per refresh, the text scrolls smoothly, but may scroll very slowly.
The invention has the beneficial effects that: compared with the prior art, the text vertical scrolling display method introduces a text display refreshing time interval and a position offset when the text display is refreshed each time, and the two items control the speed of the text scrolling display and whether the text is stuck or not, so that the controllable text scrolling display is realized, and the method has better market popularization value.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A display method for vertically scrolling characters, which comprises a timer and a text position offset, and is characterized in that the timer specifies a timing interval, each interval timer is triggered once, so that continuous refreshing display and erasure of the text in a window are realized, the text position offset is added to a text display position value when the timer is executed each time, and the method comprises the following steps:
s1, acquiring variable definitions of a character display area of a screen, and judging the sizes of the total pixel width and the display frame width of the text;
s2, according to the numerical values of the total pixel width and the display frame width of the text judged in the step S1, a formula is deduced, and the display position of the text is set as the lower boundary of the display frame;
s3, starting a timer to refresh the text;
s4, after the text is refreshed in the step S3, the offset is added to the position of the refreshed text each time;
and S5, judging whether the total pixel width of the text is less than or equal to the width of the display frame according to the step S1, if so, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel, and if not, ending character scrolling when the text position is greater than the height of the display frame plus the height of the text pixel plus the number of lines of the text.
2. The method for displaying vertical scrolling of characters as claimed in claim 1, wherein in step S1, the height of the text display box is h1, the width of the text display box is w1, the height of the text pixels is h2, the total width of the text pixels is w2, the time required for completing the text display is t, the refresh interval time of the timer is t1, the vertical displacement at each refresh is offset, the total number of lines of the text scrolling is n, and the total displacement for completing the text scrolling on the text is h.
3. The method as claimed in claim 1, wherein in step S2, when the total pixel width of the text is less than or equal to the display frame width, the number of text lines is ═ 1 (total text width/display frame width), and then the text display position is set as the display frame lower boundary.
4. The method for displaying vertical scrolling of characters as claimed in claim 1, wherein in said step S2, the formula is derived as follows: n is (w1/w2) +1, h is h2 n + h1, the roll-up of the total displacement h is completed, the total required refresh number counts is h/offset, the roll-up of the characters of the total displacement h is completed, and the total required time t is counts t 1.
5. The method for displaying vertical scrolling of characters according to claim 4, wherein h, h2, n + h1, h2, (w1/w2) +1) + h1, h, counts offset, (t offset)/t1, and from the above two formulas, (t offset)/t1, h2 ((w1/w2) +1) + h1, and the offset is left to the right of the equal sign to derive t/t1, (h2 ((w1/w2) +1) + h 1)/offset.
6. The method of claim 5, wherein the formula explains that: the left side of the equal sign is interpreted as: the total display time, divided by the text refresh interval, is equal to the total number of refreshes performed after the text has been displayed.
7. The method of claim 5, wherein the formula explains that: the equal sign right is interpreted as: multiplying the height of the text to be displayed by the total line number of the text to be displayed, wherein the sum of the height of the text display box is the total height required by the completion of the text scrolling; the result is the total number of refreshes required, and the result of the equation on both sides of the equal sign refers to the total number of refreshes required for completing the text scrolling.
8. The method as claimed in claim 1, wherein the timer is set to t1 for manual assignment and then manually assigns offset for controlling scrolling of text.
9. The method of claim 1, wherein the text position offset is increased by an offset each time the timer is executed, and the text is visually moved.
10. The method as claimed in claim 5, wherein the total time t required for completing the text display is known, the height h2 of the text to be displayed is known, the total length w2 of the text and the length w1 of the display frame are known, and the height h1 of the display frame is known, so that only the refresh interval t1 and the refresh offset are unknown in the formula.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115376306A (en) * | 2022-08-22 | 2022-11-22 | 南京工业大学 | Intelligent traffic dynamic marking method |
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