CN102157140A - Backlight control device and control method of backlight control device - Google Patents
Backlight control device and control method of backlight control device Download PDFInfo
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- CN102157140A CN102157140A CN2010101163065A CN201010116306A CN102157140A CN 102157140 A CN102157140 A CN 102157140A CN 2010101163065 A CN2010101163065 A CN 2010101163065A CN 201010116306 A CN201010116306 A CN 201010116306A CN 102157140 A CN102157140 A CN 102157140A
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Abstract
The invention provides a backlight control device and a control method of the backlight control device, wherein the backlight control device is used for controlling the luminance of a backlight board, and composed of an image analyzer and a mode switcher. The image analyzer receives current frame information and previous frame information, compares and obtains the variable quantity of the current frame information and the previous frame information. The mode switcher receives the variable quantity and sets a display mode for adjusting the luminance of the backlight board according to the variable quantity.
Description
Technical field
The invention relates to a kind of backlight control apparatus and method, and particularly relevant for a kind of control device and method of backlight of display panel.
Background technology
In the luminous display device of passive type (for example liquid crystal indicator), providing backlight to be used as light emitting source is a kind of known technology of behaving most.And at the display quality of display device because user's demand and when constantly promoting, the simple light source that provides not only just is provided backlight.Backlight brightness is also adjusted in response to the consumption of different display conditions and electric power, so that the usefulness of display device can effectively rise.
(Content Adaptive Back-light Control, CABC) technology is a kind of technology that a kind of content of utilizing show image is adjusted the brightness of backlight to the context adaptive backlight control.This context adaptive backlight control technology is based on display device under the pattern that shows tableaux or dynamic menu, comes the corresponding brightness of adjusting backlight.With so reach under the power consumption of full blast, make display device present best display effect.Yet, in existing context adaptive backlight control technology, in the switching of backlight brightness, Chang Yinwei switching time incorrect, and make the shown picture of display device produce the phenomenon of flicker and reduce display quality.
Summary of the invention
The invention provides a kind of backlight control apparatus and control method thereof, carry out static state or animation display, and adjust the brightness of backlight according to this in order to automatic detection display panel.
The present invention proposes a kind of backlight control apparatus, and the brightness in order to the control backlight comprises image analyzer and mode switch.Image analyzer receives present frame information and previous frame information, relatively and obtain present frame information and previous frame change in information amount.Mode switch couples image analyzer, in order to receive variable quantity and to set display mode in order to the brightness of adjusting backlight according to variable quantity.
In an embodiment of the present invention, above-mentioned image analyzer obtains variable quantity according to the difference of the GTG value of a plurality of pixels of corresponding identical display position in frame information at present and the previous frame information.
In an embodiment of the present invention, above-mentioned mode switch is variable quantity and setting value relatively, and when variable quantity during greater than setting value, the mode switch setting display mode is an animation mode, when variable quantity was not more than setting value, the mode switch setting display mode was a static schema.
In an embodiment of the present invention, when above-mentioned display mode was animation mode, the brightness correspondence of backlight was turned down.And when display mode was static schema, the brightness correspondence of backlight was raised.
In an embodiment of the present invention, above-mentioned backlight control apparatus more comprises storer.Storer couples image analyzer, in order to receive and to store previous frame information.
The present invention proposes a kind of method for controlling backlight thereof in addition, in order to the brightness of control backlight, comprising: receive present frame information and previous frame information, relatively and obtain present frame information and previous frame change in information amount.And, set display mode in order to the brightness of adjusting backlight according to variable quantity.
Based on above-mentioned, the present invention is according to present frame information that will show and the previous frame change in information amount that shows before, learn two differences between frame information, and then learn that display is to carry out the animation or the display mode of tableaux demonstration, and adjust the brightness of backlight according to display mode.Thus, the scintillation that can effectively avoid display to be produced when display mode switches improves the quality that shows.
For the above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate institute's accompanying drawing to be described in detail below.
Description of drawings
Fig. 1 is the synoptic diagram of the backlight control apparatus 100 of one embodiment of the invention;
Fig. 2 is the synoptic diagram of the variable quantity account form of the embodiment of the invention;
Fig. 3 is the process flow diagram of the method for controlling backlight thereof of one embodiment of the invention.
Description of reference numerals
100: backlight control apparatus; 110: export/go into the interface;
121: the control working storage; 122: storer;
130: image analyzer; 140: mode switch;
150: image processor; 160: display panel;
170: adjuster backlight; 180: backlight;
190: host side; 210,220: frame information;
S310～S350: the step of method for controlling backlight thereof; DATA: information;
MODE: display mode; P1～Pm, P1 '～Pm ': GTG value.
Embodiment
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of the backlight control apparatus 100 of one embodiment of the invention.Backlight control apparatus 100 is used for controlling the brightness of backlight 180, comprises exporting/go into interface 110, controls working storage 121, storer 122, image analyzer 130, mode switch 140, image processor 150 and adjuster backlight 170.Wherein, export/go into interface 110 receptions and come from host side (host) the 190 information D ATA that transmitted, and this information D ATA is sent to respectively in control working storage 121 and the storer 122.At this, the information D ATA that host side 190 is transmitted generally includes the order data that the image of display panel video data and 100 actions of control backlight control apparatus are provided.The part of image video data then is sent to storer 122 and stores, and order data then is sent to control working storage 121 and keeps in.
In addition, the value that exporting/go into interface 110 also provides host side 190 will control storage in working storage 121 or the storer 122 is read, and this knows the known technology of the knowledgeable usually for this area tool, does not give unnecessary details for this reason at this.
Also or image analyzer 130 can set up previous frame information and present all gray scale histograms (histogram) of the pixel of frame information, and compare at two gray scale histograms, whether calculate the gray scale histogram of previous frame information and the variable quantity of the gray scale histogram of present frame information, it is excessive with present frame change in information to judge previous frame information by this.
Please again with reference to Fig. 1, mode switch 140 is coupled to image analyzer 130 and receives the variable quantity that image analyzer 130 is produced.Mode switch 140 compares at variable quantity and setting value, uses to judge that the image that shows to display panel 160 is provided is static image or dynamic image.In simple terms, when variable quantity is the summation of all GTG difference, only need come comparison at variable quantity and setting value.When variable quantity during greater than setting value, the image that display panel 160 will show is a dynamic image, and when variable quantity was not more than setting value, the image that display panel 160 will show was a static image.When if variable quantity comprises a plurality of GTG difference, 140 of mode switch compare respectively at each GTG difference and setting value that each is fixed, mode switch 140 is judged greater than the ratio that setting value accounts for all GTG differences according to all GTG differences again, the image that display panel 160 will show is static image or dynamic image, just the GTG difference ratio that accounts for all GTG differences greater than setting value is a dynamic image during greater than one, is static image when ratio is not more than aritical ratio.
Note that above-mentioned aritical ratio and setting value can be set according to thumb rule or experimental data by design engineer or user, details does not describe in detail for this reason.
Please pay special attention to backlight control apparatus 100 detection of dynamic display panels 160 images to display, and the brightness of when display panel 160 display frames have bigger the variation, switching backlight 180.Thus, the brightness change action of backlight 180 is difficult for being discovered by the user, effectively lowers the situation of film flicker.
Subsidiary one what carry is that adjuster backlight 170 is same accepts to come from the control signal of controlling working storage 121.It is with being intended to provide the user to adjust the interface of control backlight 180 brightness by host side 190.Also therefore, when the brightness that adjuster 170 backlight carries out backlight 180 at foundation display mode MODE was adjusted, the brightness of the backlight 180 that can set by host side 190 according to above-mentioned user was that benchmark is adjusted.For instance, when display mode MODE is static schema, backlight 180 brightness that the brightness of the backlight of setting with the user 180 is.And when display mode MODE be animation mould when showing, then the brightness of the backlight of setting with the user 180 be multiply by one less than 1 proportional numers (as 80%), adjusts backlight 180 brightness.
Below please refer to Fig. 3, Fig. 3 is the process flow diagram of the method for controlling backlight thereof of one embodiment of the invention.At first, with previous frame information storage (step S310) in storer, and the previous frame information that receives in present frame information and the storer compares to obtain two variable quantities (step S320) between frame information.At this, frame information also can be stored in the storer earlier at present, and when carrying out the comparison of present frame information and previous frame information, is taken out by storer again.Also or at present frame information need not be stored in the storer and directly provides and compared by the previous frame information of being taken out in the storer.
After obtaining variable quantity, then judge the relation (step S330) of variable quantity V and setting value S, wherein, then carry out the switching (step S350) of display mode as variable quantity V during greater than setting value S.Opposite, if when judging variable quantity V and being not more than setting value S, then do not carry out the switching of display mode and reply execution in step S310.In addition, host side can also be sent and require to carry out the switching of display mode, so the switching that whether requires to carry out display mode at host side among the step S340 is judged.If host side requires to carry out the switching of display mode, execution in step S330 and find out previous frame information and the bigger time point of frame information change amount at present then, and carry out the switching of display mode.Switching requirement with the display mode of reaching host side.
In sum, when the present invention utilized the shown image variable quantity of display panel big, the brightness of carrying out backlight was switched.Effectively reduce because the phenomenon of the display frame flicker of being derived is switched in backlight brightness.When taking into account the saving power consumption, more effective lifting display quality.
Though the present invention describes as above with embodiment; yet it is not in order to limit the present invention, to have in any affiliated technical field and know the knowledgeable usually, not break away from the spirit and scope of the invention; all can do a little and change and retouching, so protection scope of the present invention is when being as the criterion with claims.
Claims (10)
1. backlight control apparatus in order to control the brightness of a backlight, comprising:
One image analyzer receives present frame information and a previous frame information, relatively and obtain a variable quantity of this present frame information and this previous frame information; And,
One mode switch couples this image analyzer, receives this variable quantity and sets a display mode in order to the brightness of adjusting this backlight according to this variable quantity.
2. according to the described backlight control apparatus of claim 1, wherein this image analyzer obtains this variable quantity according to the difference of the GTG value of the individual pixels of majority of corresponding identical display position in this present frame information and this previous frame information.
3. according to the described backlight control apparatus of claim 1, relatively this variable quantity and a setting value of this mode switch wherein, when this variable quantity during greater than this setting value, it is an animation mode that this mode switch is set this display mode, when this variable quantity was not more than this setting value, it was a static schema that this mode switch is set this display mode.
4. according to the described backlight control apparatus of claim 3, wherein when this display mode was this animation mode, the brightness correspondence of this backlight was turned down, and when this display mode was this static schema, the brightness correspondence of this backlight was raised.
5. according to the described backlight control apparatus of claim 1, wherein also comprise:
One storer couples this image analyzer, in order to receive and this previous frame information of storage.
6. method for controlling backlight thereof in order to control the brightness of a backlight, comprising:
Receive present frame information and a previous frame information, relatively and obtain a variable quantity of this present frame information and this previous frame information; And,
Set a display mode according to this variable quantity in order to the brightness of adjusting this backlight.
7. according to the described method for controlling backlight thereof of claim 6, step relatively wherein said and that obtain this variable quantity of this present frame information and this previous frame information comprises:
Difference according to the GTG value of the individual pixels of majority of corresponding identical display position in this present frame information and this previous frame information obtains this variable quantity.
8. according to the described method for controlling backlight thereof of claim 6, the wherein said step of setting in order to this display mode of the brightness of adjusting this backlight according to this variable quantity comprises:
Relatively this variable quantity and a setting value;
When this variable quantity during greater than this setting value, setting this display mode is an animation mode; And,
When this variable quantity was not more than this setting value, setting this display mode was a static schema.
9. described according to Claim 8 method for controlling backlight thereof, wherein when this display mode was this animation mode, the brightness correspondence of this backlight was turned down, and when this display mode was this static schema, the brightness correspondence of this backlight was raised.
10. according to the described method for controlling backlight thereof of claim 6, wherein also comprise:
Store in this previous frame information to one storer.
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| CN2010101163065A CN102157140A (en) | 2010-02-11 | 2010-02-11 | Backlight control device and control method of backlight control device |
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| CN2010101163065A CN102157140A (en) | 2010-02-11 | 2010-02-11 | Backlight control device and control method of backlight control device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355536A (en) * | 2011-09-26 | 2012-02-15 | 惠州Tcl移动通信有限公司 | Electricity saving method and system for mobile terminal display screen |
| CN103050108A (en) * | 2012-12-17 | 2013-04-17 | 华为终端有限公司 | Screen backlight dynamic adjustment method and user terminal |
| CN106782431A (en) * | 2017-03-10 | 2017-05-31 | 广东欧珀移动通信有限公司 | A kind of screen backlight brightness adjusting method, device and mobile terminal |
| CN110444170A (en) * | 2019-08-21 | 2019-11-12 | 四川长虹电器股份有限公司 | Reduce the control system and method for LCD TV backlight power |
| CN113870798A (en) * | 2021-07-19 | 2021-12-31 | 义隆电子股份有限公司 | Control method applied to display |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273787A1 (en) * | 2006-05-23 | 2007-11-29 | Hitachi, Ltd. | Image processing apparatus |
| CN101131505A (en) * | 2006-08-21 | 2008-02-27 | Lg.菲利浦Lcd株式会社 | Liquid crystal display and driving method thereof |
| CN101271672A (en) * | 2007-03-23 | 2008-09-24 | 奇美电子股份有限公司 | Dynamic image detector for LCD device and its detection method |
-
2010
- 2010-02-11 CN CN2010101163065A patent/CN102157140A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070273787A1 (en) * | 2006-05-23 | 2007-11-29 | Hitachi, Ltd. | Image processing apparatus |
| CN101131505A (en) * | 2006-08-21 | 2008-02-27 | Lg.菲利浦Lcd株式会社 | Liquid crystal display and driving method thereof |
| CN101271672A (en) * | 2007-03-23 | 2008-09-24 | 奇美电子股份有限公司 | Dynamic image detector for LCD device and its detection method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355536A (en) * | 2011-09-26 | 2012-02-15 | 惠州Tcl移动通信有限公司 | Electricity saving method and system for mobile terminal display screen |
| CN103050108A (en) * | 2012-12-17 | 2013-04-17 | 华为终端有限公司 | Screen backlight dynamic adjustment method and user terminal |
| CN103050108B (en) * | 2012-12-17 | 2015-12-02 | 华为终端有限公司 | A kind of screen backlight dynamic adjustment method and user terminal |
| CN106782431A (en) * | 2017-03-10 | 2017-05-31 | 广东欧珀移动通信有限公司 | A kind of screen backlight brightness adjusting method, device and mobile terminal |
| US10475413B2 (en) | 2017-03-10 | 2019-11-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and apparatus for adjusting backlight brightness of screen, and mobile terminal |
| CN106782431B (en) * | 2017-03-10 | 2020-02-07 | Oppo广东移动通信有限公司 | Screen backlight brightness adjusting method and device and mobile terminal |
| CN110444170A (en) * | 2019-08-21 | 2019-11-12 | 四川长虹电器股份有限公司 | Reduce the control system and method for LCD TV backlight power |
| CN113870798A (en) * | 2021-07-19 | 2021-12-31 | 义隆电子股份有限公司 | Control method applied to display |
| CN113870798B (en) * | 2021-07-19 | 2023-08-08 | 义隆电子股份有限公司 | Control method applied to display |
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Application publication date: 20110817 |