CN111933068A - Driving method of display screen - Google Patents
Driving method of display screen Download PDFInfo
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- CN111933068A CN111933068A CN202010661990.9A CN202010661990A CN111933068A CN 111933068 A CN111933068 A CN 111933068A CN 202010661990 A CN202010661990 A CN 202010661990A CN 111933068 A CN111933068 A CN 111933068A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001174 ascending effect Effects 0.000 claims abstract description 20
- 230000008569 process Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 2
- 230000008859 change Effects 0.000 abstract description 6
- 230000000007 visual effect Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to the technical field of display screens, in particular to a driving method of a display screen, which comprises the following steps: detecting the temperature value of the display screen at equal time intervals; judging whether the temperature of the display screen is in an ascending trend or a descending trend according to the detected temperature value; if the temperature of the display screen is in an ascending trend, reducing the maximum limited brightness value of the display screen; and if the temperature of the display screen is in a descending trend, increasing the maximum brightness limited value of the display screen. The invention aims to provide a driving method of a display screen, and the technical scheme provided by the invention solves the problem that the display screen is dim and dim in a short time due to the fluctuation change of backlight temperature, and improves the driving visual experience.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a driving method of a display screen.
Technical Field
Benefiting from the high-speed development of the display screen industry, the larger the size of the vehicle-mounted display screen is, the higher the power consumption of the display screen is, and the higher the temperature of the display screen in the working process is. After the display screen reaches a certain temperature, the polaroid inside the display screen is deformed and folded, so that the display effect is influenced. To avoid this problem, the power consumption of the display screen must be reduced after the temperature of the display screen is high, i.e., the brightness of the display screen must be reduced.
According to the traditional power consumption reduction curve, after the brightness of the display screen is reduced, the temperature is reduced, the brightness is improved, and the temperature is reduced in a few seconds due to the fact that the brightness is changed greatly, so that the problem that the display screen is dim and dim can occur.
In the process of the display screen being dim and dim, the visual experience of a driver can be interfered, and the driving safety is seriously influenced.
Disclosure of Invention
The invention aims to provide a driving method of a display screen, and the technical scheme provided by the invention solves the problem that the display screen is dim and dim in a short time due to the fluctuation change of backlight temperature, and improves the driving visual experience.
In order to solve the above technical problem, the present invention provides a driving method of a display screen, including the following steps:
s100, detecting the temperature value of the display screen in equal time period;
s200, judging whether the temperature of the display screen is in an ascending trend or a descending trend according to the detected temperature value;
s300, if the temperature of the display screen is in an ascending trend, reducing the maximum limited brightness value of the display screen;
s400, if the temperature of the display screen is in a descending trend, the maximum limited brightness value of the display screen is increased.
Preferably, in step S100, the detecting of the temperature value includes:
s101, detecting a display screen by an ADC module of the MCU;
s102, reading a voltage value of the ADC module according to the time slice polling task;
s103, the voltage value is converted into a temperature value by the MCU.
Preferably, the time slice task is a 50ms-150ms time slice task.
Preferably, in step S200, the determining that the temperature of the display screen is in an upward trend or a downward trend includes:
s201, comparing the detected temperature value with the last continuous temperature value;
s202, if the detected temperature value is higher than the last continuous temperature value, the step S203 is executed; if the detected temperature value is lower than the last continuous temperature value, go to step S205;
s203, identifying whether the current temperature trend mark is an ascending trend;
s204, if the current temperature trend mark is an ascending trend, keeping the current temperature trend mark, and entering the step S300; if the current temperature trend flag is not an ascending trend, setting the temperature trend flag to be an ascending trend, and proceeding to step S201;
s205, identifying whether the current temperature trend mark is a descending trend;
s206, if the current temperature trend mark is a descending trend, keeping the current temperature trend mark, and entering the step S400; if the current temperature trend flag is not a downward trend, the temperature trend flag is set to be an upward trend, and the process proceeds to step S201.
Alternatively, in step S200, the determining that the temperature of the display screen is in an upward trend or a downward trend includes:
s207, reading the detected temperature value and at least two previous and continuous temperature values;
s208, comparing the three temperature values successively according to the time period;
s209, if the temperature values of the two comparison results are higher than the previous temperature values, the step S300 is executed;
s210, if the temperature values of the two comparison results are lower than the previous temperature values, the step S400 is executed.
Therefore, by applying the technical scheme provided by the invention, the current display screen is identified to be in a temperature rising or cooling state, the protection algorithm is completely different from the protection algorithm when the temperature of the traditional display screen is too high, the problem that the backlight brightness is overlooked in a short time due to the back-and-forth jumping change of the backlight temperature is reduced, the driver is more friendly, the driving visual experience is improved, and the safety is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart of a driving method according to an embodiment of the present invention;
FIG. 2 is a graph showing the relationship between the temperature and the brightness of the display panel according to the embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
According to traditional power consumption curve that falls, display screen luminance can change along with the change of temperature, therefore the phenomenon of neglecting and disappearing can appear in the display screen, can disturb driver's visual experience, influences driving safety when serious.
Referring to fig. 1, in order to solve the above technical problems, the present embodiment provides a driving method of a display screen, which adopts a brand-new protection identification algorithm when the temperature of the display screen is too high, and identifies whether the current display screen is in a temperature-increasing or temperature-decreasing state in a key step.
According to the driving method provided by the embodiment of the invention, the temperature of the vehicle-mounted display screen is generally detected by an ADC (analog to digital converter) module of the MCU (micro control unit), a voltage value is read according to a time slice polling task and is converted into a temperature value, the trend of the brightness temperature of the current display screen is judged after the temperature is obtained, and after the trend is judged, a value (limited brightness value) of how much the highest brightness value of the current display screen cannot exceed is set to be supplied to a brightness control module (adjusting backlight) for calling.
The method specifically comprises the following steps:
s100, detecting the temperature value of the display screen in equal time period.
In the detection process of the temperature value, the method specifically comprises the following steps:
s101, detecting a display screen by an ADC module of the MCU;
s102, reading a voltage value of the ADC module according to a 50ms-150ms time slice polling task;
s103, the voltage value is converted into a temperature value by the MCU.
S200, judging whether the temperature of the display screen is in an ascending trend or a descending trend according to the detected temperature value.
In this step, in order to improve the accuracy of the method for judging the variation trend of the temperature value of the display screen, at least three temperature values need to be selected for judgment. As shown in fig. 2, if the temperature value of the display screen jumps back and forth between the temperature points (i) and (iv), the variation trend of the temperature value cannot be judged; if the temperature value of the display screen jumps back and forth between the two temperature points II and III, the variation trend of the temperature value cannot be judged; only if the temperature value of the display screen changes continuously, the change trend can be accurately judged.
Accordingly, the present embodiment is exemplified by two determination methods.
The first judgment method comprises the following steps:
s201, comparing the detected temperature value with the last continuous temperature value;
s202, if the detected temperature value is higher than the last continuous temperature value, the step S203 is executed; if the detected temperature value is lower than the last continuous temperature value, go to step S205;
s203, identifying whether the current temperature trend mark is an ascending trend;
s204, if the current temperature trend mark is an ascending trend, keeping the current temperature trend mark, and entering the step S300; if the current temperature trend flag is not an ascending trend, setting the temperature trend flag to be an ascending trend, and proceeding to step S201;
s205, identifying whether the current temperature trend mark is a descending trend;
s206, if the current temperature trend mark is a descending trend, keeping the current temperature trend mark, and entering the step S400; if the current temperature trend flag is not a downward trend, the temperature trend flag is set to be an upward trend, and the process proceeds to step S201.
The second judgment method comprises the following steps:
s207, reading the detected temperature value and at least two previous and continuous temperature values;
s208, comparing the three temperature values successively according to the time period;
s209, if the temperature values of the two comparison results are higher than the previous temperature values, the step S300 is executed;
s210, if the temperature values of the two comparison results are lower than the previous temperature values, the step S400 is executed.
S300, if the temperature of the display screen is in an ascending trend, reducing the maximum limited brightness value of the display screen;
s400, if the temperature of the display screen is in a descending trend, the maximum limited brightness value of the display screen is increased.
In conclusion, the technical scheme provided by the embodiment identifies whether the current display screen is in a heating or cooling state, is completely different from a traditional protection algorithm when the temperature of the display screen is too high, reduces the problem that the backlight brightness is overlooked in a short time due to the fact that the backlight temperature jumps back and forth, is more friendly to a driver, improves the driving visual experience, and is safer.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (5)
1. A driving method of a display screen is characterized in that: the method comprises the following steps:
s100, detecting the temperature value of the display screen in equal time period;
s200, judging whether the temperature of the display screen is in an ascending trend or a descending trend according to the detected temperature value;
s300, if the temperature of the display screen is in an ascending trend, reducing the maximum limited brightness value of the display screen;
s400, if the temperature of the display screen is in a descending trend, the maximum limited brightness value of the display screen is increased.
2. The driving method according to claim 1, characterized in that: in step S100, the detection of the temperature value includes:
s101, detecting a display screen by an ADC module of the MCU;
s102, reading a voltage value of the ADC module according to the time slice polling task;
s103, the voltage value is converted into a temperature value by the MCU.
3. The driving method according to claim 2, characterized in that: the time slice task is a 50ms-150ms time slice task.
4. The driving method according to claim 3, characterized in that: in step S200, determining that the temperature of the display screen is in an increasing trend or a decreasing trend includes:
s201, comparing the detected temperature value with the last continuous temperature value;
s202, if the detected temperature value is higher than the last continuous temperature value, the step S203 is executed; if the detected temperature value is lower than the last continuous temperature value, go to step S205;
s203, identifying whether the current temperature trend mark is an ascending trend;
s204, if the current temperature trend mark is an ascending trend, keeping the current temperature trend mark, and entering the step S300; if the current temperature trend flag is not an ascending trend, setting the temperature trend flag to be an ascending trend, and proceeding to step S201;
s205, identifying whether the current temperature trend mark is a descending trend;
s206, if the current temperature trend mark is a descending trend, keeping the current temperature trend mark, and entering the step S400; if the current temperature trend flag is not a downward trend, the temperature trend flag is set to be an upward trend, and the process proceeds to step S201.
5. The driving method according to claim 3, characterized in that: in step S200, determining that the temperature of the display screen is in an increasing trend or a decreasing trend includes:
s207, reading the detected temperature value and at least two previous and continuous temperature values;
s208, comparing the three temperature values successively according to the time period;
s209, if the temperature values of the two comparison results are higher than the previous temperature values, the step S300 is executed;
s210, if the temperature values of the two comparison results are lower than the previous temperature values, the step S400 is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010661990.9A CN111933068A (en) | 2020-07-10 | 2020-07-10 | Driving method of display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010661990.9A CN111933068A (en) | 2020-07-10 | 2020-07-10 | Driving method of display screen |
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| CN111933068A true CN111933068A (en) | 2020-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851088A (en) * | 2021-08-18 | 2021-12-28 | 惠州市德赛西威汽车电子股份有限公司 | Automobile instrument self-adaptive backlight control system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295535A (en) * | 2013-04-02 | 2013-09-11 | 苏州佳世达电通有限公司 | Internal temperature regulation method of displayer and displayer |
| WO2015098132A1 (en) * | 2013-12-25 | 2015-07-02 | Eizo株式会社 | Life prediction method, life prediction program, and life prediction device |
| CN107256688A (en) * | 2016-04-22 | 2017-10-17 | 长春希达电子技术有限公司 | A kind of adaptive LED display temperature control system of brightness |
| CN107704053A (en) * | 2017-08-24 | 2018-02-16 | 深圳天珑无线科技有限公司 | Mobile terminal method for regulating temperature, mobile terminal and storage device |
-
2020
- 2020-07-10 CN CN202010661990.9A patent/CN111933068A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295535A (en) * | 2013-04-02 | 2013-09-11 | 苏州佳世达电通有限公司 | Internal temperature regulation method of displayer and displayer |
| WO2015098132A1 (en) * | 2013-12-25 | 2015-07-02 | Eizo株式会社 | Life prediction method, life prediction program, and life prediction device |
| CN107256688A (en) * | 2016-04-22 | 2017-10-17 | 长春希达电子技术有限公司 | A kind of adaptive LED display temperature control system of brightness |
| CN107704053A (en) * | 2017-08-24 | 2018-02-16 | 深圳天珑无线科技有限公司 | Mobile terminal method for regulating temperature, mobile terminal and storage device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851088A (en) * | 2021-08-18 | 2021-12-28 | 惠州市德赛西威汽车电子股份有限公司 | Automobile instrument self-adaptive backlight control system and method |
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Application publication date: 20201113 |