CN114023268A - Backlight brightness adjusting method and computer readable storage medium - Google Patents
Backlight brightness adjusting method and computer readable storage medium Download PDFInfo
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- CN114023268A CN114023268A CN202111183898.7A CN202111183898A CN114023268A CN 114023268 A CN114023268 A CN 114023268A CN 202111183898 A CN202111183898 A CN 202111183898A CN 114023268 A CN114023268 A CN 114023268A
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- backlight
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005192 partition Methods 0.000 claims abstract description 42
- 239000011324 bead Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
Abstract
The present invention relates to the field of local backlight processing technologies, and in particular, to a backlight brightness adjustment method and a computer-readable storage medium. A backlight brightness adjusting method is characterized by comprising the following steps: s1, acquiring backlight source parameter information; s2, acquiring brightness distribution information of the display image signal in a period, and judging whether the display picture is a full black or white picture; judging that when a full black picture is displayed, controlling the PWM duty ratio of each partition of the backlight source to be 0, and when a displayed image is a full white field, controlling the PWM duty ratio of each partition of the backlight source to be a set value; if not, entering the next step; s3, controlling the PWM duty ratio of each backlight source partition according to the backlight driving algorithm to enable the power of each backlight source partition to meet the following requirements:
wherein n is the number of backlight partitions, and Pi is the power of the ith partition. The invention has the beneficial effect that the problem that the hardware resource of the power supply is not obtained by using the method is solvedThe problem of maximum utilization.
Description
Technical Field
The present invention relates to the field of local backlight processing technologies, and in particular, to a backlight brightness adjustment method and a computer-readable storage medium.
Background
Local Dimming technology refers to the technology of controlling light by partitions, namely dividing a television backlight into a plurality of partitions for independent control. The Local Dimming technique can maximize the brightness of the backlight in the high brightness part of the display screen image, and simultaneously the dark part can reduce the brightness and even turn off the backlight to achieve the optimal contrast ratio, but the reduction of the brightness of the dark part also reduces the power consumption of the backlight. Through Local Dimming technology, the picture backlight is intelligently adjusted, more bright and dark details are reflected, the contrast of a television can be improved, and better user experience is brought to a user.
According to the Local Dimming technology on the market at present, when a full white picture is displayed, the brightness of all backlight lamps is the highest, namely the backlight PWM ratio is 100%, the power of the whole television is the maximum at this time, the power supply runs at full load, and the utilization rate is the highest. When a bright or dark picture is displayed, the ratio of the backlight PWM of the lamp of the high-brightness part is 100 percent; the medium brightness part has PWM accounting for 1-99% according to different brightness; the ratio of PWM of the lamp backlight of the full black part of the picture is 0%. That is, except that the whole white screen television runs under the maximum power, the power utilization rate of the power supply is highest. In other bright and dark pictures, the backlight power is reduced, the power utilization rate of the power supply is reduced, and the power utilization rate of the power supply is insufficient. Moreover, for the user, the television has few chances to play pure white pictures, that is, most pictures have no power supply running at full load, and the power supply hardware design is designed according to the full load. The existing Local Dimming technology power supply hardware resources are not utilized to the maximum extent.
Disclosure of Invention
In order to solve the problem that the Local Dimming technology power supply hardware resources are not utilized to the maximum extent, the invention provides a backlight brightness adjusting method and a computer readable storage medium, and the specific scheme is as follows:
a backlight brightness adjusting method is characterized by comprising the following steps:
s1, acquiring backlight source parameter information including backlight source rated power, backlight source partition number, backlight source lamp bead rated current and screen maximum bearing temperature;
s2, acquiring brightness distribution information of the display image signal in a period, and judging whether the display picture is a full black or white picture; judging that when a full black picture is displayed, controlling the PWM duty ratio of each partition of the backlight source to be 0, and when a displayed image is a full white field, controlling the PWM duty ratio of each partition of the backlight source to be a set value; if not, entering the next step;
s3, controlling the PWM duty ratio of each backlight source partition according to the backlight driving algorithm to enable the power of each backlight source partition to meet the following requirements:
wherein n is the number of backlight partitions, PiIs the power of the ith partition.
Specifically, the period is a refresh period of a screen picture.
Specifically, the set value is such that the backlight temperature is less than the maximum screen withstanding temperature.
Specifically, the backlight driving algorithm comprises the steps of:
a1, calculating an average luminance L (LZ) of the image signal corresponding to each partition1+LZ2+···LZn) Number of divisions, LZnThe average brightness of the graphic signal corresponding to the partition n; calculating the average PWM duty ratio PZ of each partition under the rated power of the backlight source
A2, calculating PWM duty ratio PZ (LZ) of each partitionn/L)。
A computer readable storage medium using the backlight brightness adjusting method is characterized in that the computer readable storage medium stores a backlight brightness adjusting program, and the backlight brightness adjusting program realizes the steps of the backlight brightness adjusting method when being executed by a processor.
The invention has the beneficial effects that:
by using the method of the invention, when a non-full white and full black picture is displayed, the backlight power of each subarea is controlled by controlling the PWM duty ratio of each subarea, so that the sum of the backlight power of each subarea is equal to the backlight source settable power, the power supply hardware is fully utilized, and the temperature of a display system can be reduced by reducing the brightness power in a full white field, and the stability of the system is improved.
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 or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
The invention discloses a backlight brightness adjusting method and a computer readable storage medium;
a method for adjusting backlight brightness, as shown in fig. 1, includes the following steps:
s1, acquiring backlight source parameter information including backlight source rated power, backlight source partition number, backlight source lamp bead rated current and screen maximum bearing temperature;
s2, acquiring brightness distribution information of the display image signal in a period, and judging whether the display picture is a full black or white picture; judging that when a full black picture is displayed, controlling the PWM duty ratio of each partition of the backlight source to be 0, and when a displayed image is a full white field, controlling the PWM duty ratio of each partition of the backlight source to be a set value; if not, entering the next step;
s3, controlling the PWM duty ratio of each backlight source partition according to the backlight driving algorithm to enable the power of each backlight source partition to meet the following requirements:
wherein n is the number of backlight partitions, and Pi is the power of the ith partition.
The period is a refreshing period of the screen picture.
The set value enables the backlight source temperature to be smaller than the maximum bearing temperature of the screen.
The backlight driving algorithm comprises the steps of:
a1, calculating the average brightness L ═ of the image signal corresponding to each partition (LZ1+ LZ2+ · · LZn)/number of partitions, LZn is the average brightness of the graphics signal corresponding to partition n; calculating the average PWM duty ratio PZ of each partition under the rated power of the backlight source
A2, calculating PWM duty ratio (PZ) (LZn/L) of each partition.
A computer-readable storage medium using the backlight brightness adjustment method described above, the computer-readable storage medium having stored thereon a backlight brightness adjustment program, which when executed by a processor, implements the steps of the backlight brightness adjustment method described above.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A backlight brightness adjusting method is characterized by comprising the following steps:
s1, acquiring backlight source parameter information including backlight source rated power, backlight source partition number, backlight source lamp bead rated current and screen maximum bearing temperature;
s2, acquiring brightness distribution information of the display image signal in a period, and judging whether the display picture is a full black or white picture; judging that when a full black picture is displayed, controlling the PWM duty ratio of each partition of the backlight source to be 0, and when a displayed image is a full white field, controlling the PWM duty ratio of each partition of the backlight source to be a set value; if not, entering the next step;
s3, controlling the PWM duty ratio of each backlight source partition according to the backlight driving algorithm to enable the power of each backlight source partition to meet the following requirements:
wherein n is the number of backlight partitions, PiIs the power of the ith partition.
2. The backlight brightness adjustment method according to claim 1, wherein the period is a refresh period of a screen.
3. The method as claimed in claim 1, wherein the setting value is such that the backlight temperature is less than the maximum temperature of the screen.
4. The backlight brightness adjusting method according to claim 1, wherein the backlight driving algorithm comprises the following steps:
a1, calculating an average luminance L (LZ) of the image signal corresponding to each partition1+LZ2+···LZn) Number of divisions, LZnThe average brightness of the graphic signal corresponding to the partition n; calculating the average PWM duty ratio PZ of each partition under the rated power of the backlight source
A2, calculating PWM duty ratio PZ (LZ) of each partitionn/L)。
5. Computer readable storage medium using a backlight brightness adjustment method according to claims 1-4, characterized in that the computer readable storage medium has stored thereon a backlight brightness adjustment program, which when executed by a processor implements the steps of the backlight brightness adjustment method according to any of claims 1-4.
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| CN202111183898.7A CN114023268A (en) | 2021-10-11 | 2021-10-11 | Backlight brightness adjusting method and computer readable storage medium |
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Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295467A (en) * | 2007-04-29 | 2008-10-29 | 瑞昱半导体股份有限公司 | Contrast control device and control method thereof |
| CN102203847A (en) * | 2008-10-10 | 2011-09-28 | 夏普株式会社 | Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device |
| CN102281619A (en) * | 2010-06-08 | 2011-12-14 | 中兴通讯股份有限公司 | Method, device and system for distributing power |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
| CN105390096A (en) * | 2015-11-24 | 2016-03-09 | 深圳创维－Rgb电子有限公司 | Method and device for over-driving control of regional dimming |
| CN105657927A (en) * | 2014-11-14 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source driving circuit and light source electric energy control circuit |
| CN105765428A (en) * | 2013-10-17 | 2016-07-13 | 纳米系统公司 | Light emitting diode (LED) devices |
| CN106128372A (en) * | 2016-09-14 | 2016-11-16 | 广州创维平面显示科技有限公司 | The control method of a kind of direct-light-type backlight, control system and LCD TV |
| CN106448570A (en) * | 2016-09-14 | 2017-02-22 | 深圳创维－Rgb电子有限公司 | High-power area dimming control method, control device and television |
| CN107464533A (en) * | 2017-08-21 | 2017-12-12 | 深圳创维－Rgb电子有限公司 | A kind of constant-current drive circuit and television set |
| CN107666576A (en) * | 2016-07-29 | 2018-02-06 | 四川长虹电器股份有限公司 | A kind of method and apparatus of LCD TV backlight control |
| CN107845368A (en) * | 2017-11-15 | 2018-03-27 | 深圳市华星光电技术有限公司 | Method for controlling backlight thereof and system based on LED drivings |
| CN108962150A (en) * | 2018-06-13 | 2018-12-07 | 深圳创维－Rgb电子有限公司 | Image quality optimization method, apparatus, equipment and storage medium based on local dimming |
| CN208507171U (en) * | 2018-07-20 | 2019-02-15 | 珠海诚锋电器有限公司 | A kind of television backlight current control system |
| CN109949752A (en) * | 2019-04-03 | 2019-06-28 | 深圳康佳电子科技有限公司 | A kind of region display lightness regulating method, playback terminal and storage medium |
| CN110706660A (en) * | 2019-10-25 | 2020-01-17 | 四川长虹电器股份有限公司 | Multi-partition backlight control method based on picture brightness and overall power consumption |
| CN210986506U (en) * | 2019-08-26 | 2020-07-10 | 漳州立达信光电子科技有限公司 | Color mixing L ED lighting system and driving circuit thereof |
| CN211698971U (en) * | 2019-07-29 | 2020-10-16 | 深圳阜时科技有限公司 | Fingerprint sensing device and electronic equipment |
| CN113053329A (en) * | 2021-03-26 | 2021-06-29 | 深圳前海骁客影像科技设计有限公司 | Backlight control system |
| CN113219727A (en) * | 2021-04-27 | 2021-08-06 | 福州大学 | Mini LED backlight module |
-
2021
- 2021-10-11 CN CN202111183898.7A patent/CN114023268A/en active Pending
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295467A (en) * | 2007-04-29 | 2008-10-29 | 瑞昱半导体股份有限公司 | Contrast control device and control method thereof |
| CN102203847A (en) * | 2008-10-10 | 2011-09-28 | 夏普株式会社 | Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device |
| CN102281619A (en) * | 2010-06-08 | 2011-12-14 | 中兴通讯股份有限公司 | Method, device and system for distributing power |
| CN105765428A (en) * | 2013-10-17 | 2016-07-13 | 纳米系统公司 | Light emitting diode (LED) devices |
| CN105657927A (en) * | 2014-11-14 | 2016-06-08 | 凹凸电子（武汉）有限公司 | Light source driving circuit and light source electric energy control circuit |
| CN105390096A (en) * | 2015-11-24 | 2016-03-09 | 深圳创维－Rgb电子有限公司 | Method and device for over-driving control of regional dimming |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
| CN107666576A (en) * | 2016-07-29 | 2018-02-06 | 四川长虹电器股份有限公司 | A kind of method and apparatus of LCD TV backlight control |
| CN106448570A (en) * | 2016-09-14 | 2017-02-22 | 深圳创维－Rgb电子有限公司 | High-power area dimming control method, control device and television |
| CN106128372A (en) * | 2016-09-14 | 2016-11-16 | 广州创维平面显示科技有限公司 | The control method of a kind of direct-light-type backlight, control system and LCD TV |
| CN107464533A (en) * | 2017-08-21 | 2017-12-12 | 深圳创维－Rgb电子有限公司 | A kind of constant-current drive circuit and television set |
| CN107845368A (en) * | 2017-11-15 | 2018-03-27 | 深圳市华星光电技术有限公司 | Method for controlling backlight thereof and system based on LED drivings |
| CN108962150A (en) * | 2018-06-13 | 2018-12-07 | 深圳创维－Rgb电子有限公司 | Image quality optimization method, apparatus, equipment and storage medium based on local dimming |
| CN208507171U (en) * | 2018-07-20 | 2019-02-15 | 珠海诚锋电器有限公司 | A kind of television backlight current control system |
| CN109949752A (en) * | 2019-04-03 | 2019-06-28 | 深圳康佳电子科技有限公司 | A kind of region display lightness regulating method, playback terminal and storage medium |
| CN211698971U (en) * | 2019-07-29 | 2020-10-16 | 深圳阜时科技有限公司 | Fingerprint sensing device and electronic equipment |
| CN210986506U (en) * | 2019-08-26 | 2020-07-10 | 漳州立达信光电子科技有限公司 | Color mixing L ED lighting system and driving circuit thereof |
| CN110706660A (en) * | 2019-10-25 | 2020-01-17 | 四川长虹电器股份有限公司 | Multi-partition backlight control method based on picture brightness and overall power consumption |
| CN113053329A (en) * | 2021-03-26 | 2021-06-29 | 深圳前海骁客影像科技设计有限公司 | Backlight control system |
| CN113219727A (en) * | 2021-04-27 | 2021-08-06 | 福州大学 | Mini LED backlight module |
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Application publication date: 20220208 |