CN113724632B - Control method and device for adjusting display brightness according to number of pen segments - Google Patents
Control method and device for adjusting display brightness according to number of pen segments Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a control method and a device for adjusting display brightness according to the number of pen sections, wherein the method comprises the following steps: setting a scanning period for finishing scanning all public terminals once and taking the scanning period as a small period; setting a large period, wherein the large period comprises a plurality of small periods; presetting an array which is a mapping relation array of different lighting pen segment numbers of a public terminal and the power-on times in a large period; acquiring the number of the lighting pen segments corresponding to each public terminal according to the content to be displayed; acquiring the energizing times of each public terminal in a large period according to the number of the corresponding illuminating pen segments and the array of each public terminal; and scanning each public terminal in sequence according to the power-on times of each public terminal in a large period and the content to be displayed. The invention can independently adjust the brightness of each public terminal, has more balanced display effect and avoids the flicker phenomenon when switching display contents.
Description
Technical Field
The invention relates to the technical field of pen segment screens, in particular to a control method and a device for adjusting display brightness according to the number of pen segments.
Background
Referring to fig. 1, a pen section screen commonly used for a household appliance is provided, wherein a common end is C, a scanning end is S, and an intersection point of the common end C and the scanning end S is a lamp. In the dynamic scanning process, the common end C is electrified in turn in sequence, the corresponding scanning end S is electrified selectively according to the display content, and when the scanning speed of the common end C exceeds the human eye capturing frequency, the human eye can see a stable lighting state on the pen section screen. As shown in fig. 2, if the light point shown by the circle in fig. 2 is to be lightened, the light point can be turned on at 1S, c1 and S1 at the time of scanning; the 2S, C2 is conducted, and S3 and S4 are conducted; 3S, C3 is conducted, S5, S6 and S7 are conducted; 4S, C4 is conducted, and S2, S3, S4 and S5 are conducted; the operation is repeated for the 5 th ms, and the cycle is repeated. The switching period is 1s, and the human eyes can obviously see that the lamps from C1 to C4 are lighted in turn. When the switching period is changed to 1ms, it takes 4ms to complete a cycle, which exceeds the human eye capture frequency (about 15 ms), when the human eye sees that the C1 to C4 lamps are on simultaneously.
However, this display mode has a problem that each common terminal C displays a different number of pen segments when the display contents are different, and the pen segments are slightly brighter when the pen segments are fewer than when the pen segments are more because of the problem of the driving capability of the chip. When the display content changes, the screen brightness also changes, and a switching flicker phenomenon is generated. As shown in fig. 3, switching from the number 6 to the number 7 is a dynamic switching process, and the intersection point of C1 and S8 is a signal point, and it is originally required to flash during the digital switching process, so that even if there is a slight change in brightness, the human eye will not be aware of the change. The positions of the signal points are static, and the brightness is obviously changed. The reason is that: solely for the common terminal C1, the chips need to be turned on S2, S3, S4, S5, S6, S8 in the a state, and the chips need only to be turned on S2, S8 in the b state. Ideally, the current through each scan segment is the same during each common-side scan. For example: in the a state, s2+s3+s4+s5+s6+s8=60 ma, s2=s3=s4=s5=s6=s8=10ma; in the b state, s2+s8=20ma, s2=s8=10ma. However, the actual situation is as follows: the current is slightly larger when the lamp is small, and is slightly smaller when the lamp is large. For example: in the a state, s2+s3+s4+s5+s6+s8=60 ma, s2=s3=s4=s5=s6=s8=10ma; s2+s8=22ma, s2=s8=11ma in the b state. Or in the a state, s2+s3+s4+s5+s6+s8=54 ma, s2=s3=s4=s5=s6=s8=9ma. In the b state, s2+s8=20ma, s2=s8=10ma. Thus, C1 will be bright in the b state and C1 will be dark in the a state. The flicker in the switching process is obvious, and the customer experience is affected.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem of flicker generated when a pen section screen switches display contents, the invention provides a control method for adjusting display brightness according to the number of pen sections, which comprises the following steps:
setting a scanning period for finishing scanning all public terminals once and taking the scanning period as a small period;
setting a large period, wherein the large period comprises a plurality of small periods;
presetting an array, wherein the array is a mapping relation array of different lighting pen segment numbers of a public terminal and the power-on times in the large period;
acquiring the number of the lighting pen segments corresponding to each public terminal according to the content to be displayed;
acquiring the energizing times of each public terminal in the large period according to the number of the illuminating pen segments corresponding to each public terminal and the array;
and scanning each public terminal in sequence according to the power-on times of each public terminal in the large period and the content to be displayed.
In one embodiment, the step of "presetting an array" includes:
the method comprises the steps of obtaining the corresponding electrifying currents of a public terminal in different lighting pen segment numbers, and taking the electrifying current corresponding to the largest lighting pen segment number as a standard value;
according to the corresponding energizing currents of the public terminal in different numbers of the illuminating pen sections, obtaining equivalent currents of the public terminal in different numbers of the energizing times in a large period;
and according to the equivalent current and the standard value, obtaining a mapping relation array of different lighting pen segment numbers of the public terminal and the power-on times in the large period.
In an embodiment, the step of obtaining the mapping relation array of the number of different lighting pen segments of the public terminal and the number of times of power-on in the large period according to the equivalent current and the standard value includes:
subtracting the standard value from equivalent currents corresponding to different power-on times of different lighting pen segments of the public terminal in a large period, and taking an absolute value;
the power-on times corresponding to the minimum absolute value under different lighting pen segment numbers are used as the power-on times in a large period under the lighting pen segment numbers;
and constructing the array based on the different lighting pen segment numbers and the corresponding power-on times in a large period.
In an embodiment, the step of obtaining the equivalent current corresponding to different power-on times of different lighting pen segments of the public terminal in a large period includes:
the equivalent current is obtained by the following method:
wherein N is the number of times of energization in a large period, N is the maximum number of times of energization in a large period, A i The current corresponding to the number of i lighting pen segments A i * The equivalent current corresponding to the number of i lighting pen segments.
In an embodiment, after the step of obtaining the mapping relation array of the number of different lighting pen segments of the public terminal and the number of times of power-on in the large period according to the equivalent current and the standard value, the method further includes:
scanning each public end in sequence according to the array so as to display different lighting pen segment numbers;
acquiring light intensities corresponding to different lighting pen segment numbers, and fine-tuning the array according to the light intensities;
and taking the array after fine tuning as the array finally selected.
In one embodiment, the step of setting the scan period for completing all the common terminal scans once and as a small period includes:
and acquiring the scanning time of scanning one common terminal, and setting the scanning period for finishing the scanning of all the common terminals once based on the scanning time and the number of the common terminals.
In one embodiment, the large period is less than 15ms.
The present invention also provides a storage device in which a plurality of programs are stored, the programs being adapted to be loaded and executed by a processor to implement the above control method for adjusting display brightness by number of pen segments.
The invention also provides a control device, comprising: a processor adapted to execute each program; a storage device adapted to store a plurality of programs; the program is suitable for being loaded and executed by a processor to realize the control method for adjusting the display brightness according to the number of pen segments.
Compared with the prior art, the technical scheme at least has the following beneficial effects:
the control method for adjusting the display brightness according to the number of pen segments provided by the invention can independently adjust the brightness of each public terminal by setting the large period, the small period and the array, has more balanced display effect, does not generate flickering phenomenon when switching display contents, and can be used as special purposes such as key contents, highlighting display and the like.
Furthermore, the control method for adjusting the display brightness according to the number of pen segments provided by the invention has strong adaptability and can be suitable for pen segment screens of various household appliances.
Drawings
FIG. 1 is a schematic view of a pen segment screen;
FIG. 2 is a schematic diagram of a pen segment screen display;
FIG. 3 is a schematic diagram of a two state switching process for a pen segment screen;
FIG. 4 is a schematic diagram showing the main steps of a control method for adjusting display brightness according to the number of pen segments according to the present invention;
FIG. 5 is a schematic diagram of the sequential scanning process during a large period of the state a of FIG. 3;
fig. 6 is a schematic diagram of a sequential scanning process during a large period of the b state in fig. 3.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
Referring to fig. 4, fig. 4 illustrates the main steps of a control method for adjusting display brightness by the number of pen segments. As shown in fig. 4, the control method for adjusting display brightness according to the number of pen segments according to the embodiment of the present invention mainly includes:
step S1: setting a scanning period for completing all public end scanning at a time and taking the scanning period as a small period. Specifically, the scanning time for scanning one common terminal is obtained, and the scanning period for completing all the scanning of the common terminal at one time is set based on the scanning time and the number of the common terminals. As shown in fig. 1, for example, the time for scanning 1 common terminal is 300 μm, and the number of common terminals is 4, the scanning period for completing one C1-C4 is 300 μm×4=1.2 ms. The time of the small period can be set according to the control capability or the actual display condition of the chip, and the specific time of the small period is not limited.
Step S2: a large period is set, and the large period comprises a plurality of small periods. That is, a plurality of small periods form a large period, and the number of the small periods contained in the large period can be set according to actual use conditions. The time of the large period is preferably less than 15ms, i.e. less than the human eye capture frequency. The time of the large period in this embodiment is 12ms, i.e. the large period comprises 10 small periods.
Step S3: an array is preset, wherein the array is a mapping relation array of different lighting pen segment numbers at a public end and the power-on times in a large period.
Specifically, the corresponding energizing current of the public terminal in different lighting pen segment numbers is obtained, and the energizing current corresponding to the largest lighting pen segment number is taken as a standard value. Specifically, a common terminal can be selected, and the current of each pen section is measured when different pen section numbers are lightened, and the current of one pen section is measured only because the current of the same common terminal is divided equally. In this embodiment, taking C1 as an example, the measurement results are shown in table 1, and the current corresponding to the maximum number of lighting pen segments is 8ma, and therefore 8 is selected as the standard value.
Table 1.
And obtaining equivalent currents corresponding to different energization times of different lighting pen segments of the public terminal in a large period according to the energization currents corresponding to the different lighting pen segments of the public terminal. Specifically, the equivalent current is obtained according to the method shown in the formula (1):
wherein N is the number of times of energization in a large period, N is the maximum number of times of energization in a large period, A i The current corresponding to the number of i lighting pen segments A i * The equivalent current corresponding to the number of i lighting pen segments.
And obtaining a mapping relation array of different lighting pen segment numbers of the public terminal and the power-on times in a large period according to the equivalent current and the standard value. Specifically, subtracting standard values from equivalent currents corresponding to different energization times of different lighting pen segments of a public terminal in a large period, and taking absolute values; and taking the power-on times corresponding to the minimum absolute values under different lighting pen segment numbers as the power-on times in a large period under the lighting pen segment numbers. For example:
number of lighting pen segments 7:10/10 x 8.5=8.5, |8.5-8|=0.5; 9/10×8.5=7.65, |7.65-8|=0.35; 8/10×8.5=6.8, |6.8-8|=1.2; …; therefore, 9 is the number of times of power-on in a large period when the pen segment number 7 is lighted.
Number of lighting pen segments 6:10/10×9=9, |9-8|=1; 9/10×9=8.1, |8.1-8|=0.1; 8/10×9=7.2, |7.2-8|=1.8. …; therefore, 9 is the number of times of power-on in a large period when the pen segment number 6 is lighted.
Number of lighting pen segments 5:10/10 x 9.5=9.5, |9.5-8|=0.5; 9/10×9.5=8.55, |8.55-8|=0.55; 8/10 x 9.5=7.6, |7.6-8|=0.4; …; therefore, 8 is the number of times of power-on in a large period when the pen segment number is 5.
Number of lighting pen segments 4:10/10×10=10, |10-8|=2; 9/10×10=9, |9-8|=1; 8/10×10=8, |8-8|=0; …,8 is the number of times of power-on in a large period when the number of pen segments is 4.
Number of lighting pen segments 3:10/10×10=10, |10-8|=2; 9/10×10=9, |9-8|=1; 8/10×10=8, |8-8|=0; …,8 is the number of times of power-on in a large period when the number of the lighted pen segments is 3.
Number of lighting pen segments 2:10/10×10=10, |10-8|=2; 9/10×10=9, |9-8|=1; 8/10×10=8, |8-8|=0; …,8 is the number of times of power-on in a large period when the number of the lighted pen segments is 2.
Number of lighting pen segments 1:10/10×10=10, |10-8|=2; 9/10×10=9, |9-8|=1; 8/10×10=8, |8-8|=0; …,8 is the number of times of power-on in a large period when the number of the lighted pen segments is 1.
And constructing an array based on the different lighting pen segment numbers and the corresponding power-on times in a large period. The mapping relationship between the number of lighting pen segments and the number of power-on times in a large period in this embodiment is shown in table 2,
TABLE 2
| Number of lighted pen segments | Array value |
| 1 | 8 |
| 2 | 8 |
| 3 | 8 |
| 4 | 8 |
| 5 | 8 |
| 6 | 9 |
| 7 | 9 |
| 8 | 10 |
Thus, the array is SEG_num [9] {0,8,8,8,8,8,9,9, 10}
0 1 2 3 4 5 6 7 8
When the lighting pen section is 0, no pen section is lighted, so the power-on frequency is always 0.
In addition, each common end can be scanned in sequence according to the array so as to display different lighting pen segment numbers. And testing or visually observing the light intensities corresponding to different lighting pen sections through an optical instrument, finely adjusting the array according to the light intensities, and taking the finely adjusted array as a finally selected array. If the display light intensity is equalized according to the array, fine adjustment is not required. Fine tuning can be performed only when there is a deviation in the light intensity. For example, if the number of illuminated pen segments is 3, the array SEG_num [9] {0,8,8,8,8,8,9,9, 10}, may be set to
0 1 2 3 4 5 6 7 8
The method is changed into that:
SEG_num[9]{0，8，8，7，8，8，9，9，10}
0 1 2 3 4 5 6 7 8
step S4: and acquiring the number of the lighting pen segments corresponding to each public terminal according to the content to be displayed. The pen segments required to be lightened at each public terminal can be determined according to the content to be displayed, and the corresponding number of the lightened pen segments is further obtained.
Step S5: and acquiring the energizing times of each public terminal in a large period according to the number of the corresponding illuminating pen segments and the array of each public terminal. I.e. the number of power-ups per common terminal in a large period can be determined by the array. For example, corresponding to the a state display content of fig. 2, C1 is 6 segments, C2 is 3 segments, C3 is 3 segments, and C4 is 4 segments; corresponding to the array, the values are SEG_num [6], SEG_num [3], SEG_num [4]; the number of times of energization is 9 times, 7 times, 8 times respectively. Whereas the b state display content corresponding to fig. 2 has 2 segments C1, 1 segment C2, 1 segment C3 and 5 segments C4; corresponding to the array, the values are SEG_num [2], SEG_num [1], SEG_num [5]; the number of times of energization is 8 times, 8 times respectively.
Step S6: and scanning each public terminal in sequence according to the power-on times of each public terminal in a large period and the content to be displayed. For example, the effect of sequential scanning over a large period is shown in fig. 5 and 6, where fig. 5 corresponds to the a-state display content of fig. 2 and fig. 6 corresponds to the b-state display content of fig. 2. Wherein the common end of the bolded fonts indicates that the power is on in the corresponding small period, and the common end of the non-bolded fonts indicates that the power is not on in the corresponding small period. The action in each large period is circulated, so that the display brightness of the pen section screen is more balanced, and the flicker phenomenon is avoided.
In summary, the control method for adjusting display brightness according to the number of pen segments provided by the invention can consider the current difference caused by different lighting pen segments, thereby causing brightness change. The invention adjusts the power-on times of each public terminal in the large period according to the number of the lighting pen segments, so that the power-on time of each public terminal in the large period can be controlled independently, and the phenomenon of switching and flickering is eliminated.
The embodiment of the invention also provides a storage device, wherein a plurality of programs are stored, and the programs are suitable for being loaded and executed by a processor to realize the control method for adjusting the display brightness according to the number of the pen segments.
The embodiment of the invention also provides a control device, which comprises: a processor adapted to execute each program; a storage device adapted to store a plurality of programs; the program is adapted to be loaded and executed by a processor to implement the control method for adjusting display brightness by number of strokes described above.
Those of skill in the art will appreciate that the various illustrative method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of functionality in order to clearly illustrate the interchangeability of electronic hardware and software. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not intended to be limiting.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (8)
1. A control method for adjusting display brightness according to the number of pen segments, the method comprising:
setting a scanning period for finishing scanning all public terminals once and taking the scanning period as a small period;
setting a large period, wherein the large period comprises a plurality of small periods;
presetting an array, wherein the array is a mapping relation array of different lighting pen segment numbers of a public terminal and the power-on times in the large period;
acquiring the number of the lighting pen segments corresponding to each public terminal according to the content to be displayed;
acquiring the energizing times of each public terminal in the large period according to the number of the illuminating pen segments corresponding to each public terminal and the array;
according to the energizing times of each public terminal in the large period and the content to be displayed, scanning each public terminal in sequence;
the step of presetting an array includes:
the method comprises the steps of obtaining the corresponding electrifying currents of a public terminal in different lighting pen segment numbers, and taking the electrifying current corresponding to the largest lighting pen segment number as a standard value;
according to the corresponding energizing currents of the public terminal in different numbers of the illuminating pen sections, obtaining equivalent currents of the public terminal in different numbers of the energizing times in a large period;
and according to the equivalent current and the standard value, obtaining a mapping relation array of different lighting pen segment numbers of the public terminal and the power-on times in the large period.
2. The method for controlling display brightness according to the number of segments according to claim 1, wherein the step of obtaining the mapping relation array of the number of different lighting segments and the number of times of power-on in the large period of the common terminal according to the equivalent current and the standard value comprises:
subtracting the standard value from equivalent currents corresponding to different power-on times of different lighting pen segments of the public terminal in a large period, and taking an absolute value;
the power-on times corresponding to the minimum absolute value under different lighting pen segment numbers are used as the power-on times in a large period under the lighting pen segment numbers;
and constructing the array based on the different lighting pen segment numbers and the corresponding power-on times in a large period.
3. The method for controlling display brightness according to the number of segments according to claim 1, wherein the step of obtaining equivalent currents corresponding to different energization times of different lighting segments of the common terminal in a large period comprises:
the equivalent current is obtained by the following method:
；
wherein ,nn is the maximum number of times of energization in a large period,A i is thatiThe energizing current corresponding to the number of the lighting pen segments,is thatiEquivalent current corresponding to the number of the lighting pen segments.
4. The method for controlling display brightness according to the number of segments according to claim 1, wherein after the step of obtaining the mapping relation array of the number of different lighting segments and the number of times of power-on in the large period at the common terminal according to the equivalent current and the standard value, the method further comprises:
scanning each public end in sequence according to the array so as to display different lighting pen segment numbers;
acquiring light intensities corresponding to different lighting pen segment numbers, and fine-tuning the array according to the light intensities;
and taking the array after fine tuning as the array finally selected.
5. The control method for adjusting display brightness by number of segments according to claim 1, wherein the step of setting a scanning period for completing all common terminal scanning at one time as a small period comprises:
and acquiring the scanning time of scanning one common terminal, and setting the scanning period for finishing the scanning of all the common terminals once based on the scanning time and the number of the common terminals.
6. The control method for adjusting display brightness by number of pen segments according to claim 1, wherein the large period is less than 15ms.
7. A storage device in which a plurality of programs are stored, characterized in that the programs are adapted to be loaded and executed by a processor to realize the control method of adjusting display luminance by the number of pen segments according to any one of claims 1 to 6.
8. A control apparatus comprising:
a processor adapted to execute each program;
a storage device adapted to store a plurality of programs;
characterized in that the program is adapted to be loaded and executed by a processor to implement the control method of adjusting display brightness in segments according to any one of claims 1-6.
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