CN102157133A - Backlight control device and backlight control method - Google Patents
Backlight control device and backlight control method Download PDFInfo
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- CN102157133A CN102157133A CN201010115769XA CN201010115769A CN102157133A CN 102157133 A CN102157133 A CN 102157133A CN 201010115769X A CN201010115769X A CN 201010115769XA CN 201010115769 A CN201010115769 A CN 201010115769A CN 102157133 A CN102157133 A CN 102157133A
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Abstract
The invention discloses a backlight control device, which is used for controlling the luminance of backlight. The device comprises an image information memory and a detecting and auto-switching circuit, wherein the image information memory is used for memorizing image information; and the detecting and auto-switching circuit is used for detecting an updating frequency that the image information is updated, and setting a display mode which is used for adjusting the luminance of the backlight according to the updating frequency.
Description
Technical field
The present invention is relevant for a kind of backlight control apparatus and method, and is particularly to a kind of backlight control apparatus 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 the technology that a kind of content of utilizing display 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 known 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 method, is dynamic image or still image in order to judge the shown image of display panel automatically, and adjusts the brightness of backlight according to this.
The present invention proposes a kind of backlight control apparatus, and the brightness in order to the control backlight comprises image information memory and detection and automatic switch-over circuit.Image information memory is in order to store images information.Detect and automatic switch-over circuit couples the picture signal storer renewal frequency that is updated in order to detected image information.Detection and automatic switch-over circuit and according to renewal frequency to set in order to adjust the display mode of backlight brightness.
In one embodiment of the invention, above-mentioned detection and automatic switch-over circuit comprise detection counter and mode switch.Detection counter is every the update mode of setting-up time cycle detection image information, and changes count results according to update mode.Mode switch couples detection counter, and coming setting display mode in order to the foundation count results is animation mode or static schema.
In one embodiment of the invention, above-mentioned detection counter detects when image information is not updated in setting-up time, countdown result.If detection counter detects when image information has been updated in setting-up time, then increase progressively count results.
In one embodiment of the invention, during more than or equal to higher limit, the switching display mode is an animation mode to above-mentioned mode switch in count results.When mode switch was less than or equal to lower limit in count results, the switching display mode was a static schema.
The present invention also proposes a kind of method for controlling backlight thereof, and the brightness in order to the control backlight comprises: the renewal frequency of stored image information in the detected image information-storing device.And, according to renewal frequency to set in order to adjust the display mode of backlight brightness.
Based on above-mentioned, the present invention is stored in the frequency that is updated of the image information in the image information memory by detection, judges the shown image of display panel for dynamically or still image, and setting display mode according to this.Utilize the display mode that sets to adjust the brightness of backlight again, with the switching time of optimization backlight brightness.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Fig. 1 illustrates the synoptic diagram of the backlight control apparatus 100 of one embodiment of the invention.
Figure 1A illustrates the synoptic diagram of an embodiment of the detection of the embodiment of the invention and automatic switch-over circuit 120.
Fig. 2 A and 2B illustrate the detection of the embodiment of the invention and the action flow chart of automatic switch-over circuit 120.
Fig. 3 illustrates the process flow diagram of the method for controlling backlight thereof of one embodiment of the invention.
[primary clustering symbol description]
100: backlight control apparatus
101: host side
102: backlight
103: display panel
110: output/incoming interface
120: detect and automatic switch-over circuit
121: detection counter
122: mode switch
130: the control working storage
140: image information memory
150: image dissector
160: image processor
170: adjuster backlight
MODE: display mode
IM: image information
DATA: information
CNT: count results
S210～280: the action step of detection and automatic switch-over circuit 120
S310～S320: the step of method for controlling backlight thereof
Embodiment
Please refer to Fig. 1, Fig. 1 illustrates the synoptic diagram of the backlight control apparatus 100 of one embodiment of the invention.Backlight control apparatus 100 is in order to the brightness of control backlight 102.Backlight control apparatus 100 comprises output/incoming interface 110, detection and automatic switch-over circuit 120, control working storage 130, image information memory 140, image dissector 150, image processor 160 and adjuster backlight 170.Wherein, output/incoming interface 110 receives and comes from host side (host) the 101 information D ATA that transmitted, and this information D ATA is sent to control working storage 130 and detection and automatic switch-over circuit 120 respectively.At this, the information D ATA that host side 101 is transmitted generally includes image information IM that display panel is provided and the control command of controlling backlight control apparatus 100 actions.Image information IM then is sent to image information memory 140 by detection and automatic switch-over circuit 120 and stores, and control command then is sent to control working storage 130 and keeps in.
Because image information IM deposits image information memory 140 in by detection and automatic switch-over circuit 120, therefore, detection and automatic switch-over circuit 120 can be learnt the update mode of the image information IM in the image information memory 140, and further obtain the renewal frequency that image information IM is updated.In simple terms, detection and automatic switch-over circuit 120 are in cycle regular hour, image information IM in the recording image information storer 140 is carried out the number of times (the new image information IM that just adds up is reached the number of times of detection and automatic switch-over circuit 120) of renewal in the time cycle, just can obtain the renewal frequency that image information IM is updated.
Note that when display panel 103 carries out the demonstration of tableaux that at this what image information IM did not need to continue is updated, but need long time interval just can be updated.Opposite, when display panel 103 carries out the demonstration of dynamic menu, because display panel 103 is to show a plurality of different images continuously, therefore, image information IM can be by the renewal that continues.In other words, when detecting and automatic switch-over circuit 120 detects image information IM in the recording image information storer 140 is updated frequency when higher, can judge display panel 103 in the demonstration of carrying out dynamic menu, going forward side by side with setting display mode MODE is animation mode.Opposite, when detecting and automatic switch-over circuit 120 detects image information IM in the recording image information storer 140 is updated frequency when low, can judge display panel 103 in the demonstration of carrying out tableaux, going forward side by side with setting display mode MODE is static schema.
In addition, above-mentioned higher or lower judgement about renewal frequency can realize by setting a fiducial value.In case renewal frequency is during greater than this fiducial value, renewal frequency is judged as higher.Relative, when renewal frequency was not more than this fiducial value, renewal frequency was judged as lower.
Detect and 120 of automatic switch-over circuits are sent to control working storage 130 with the display mode MODE that configures, and be sent in the adjuster 170 backlight by control working storage 130.The received display mode MODE of 170 foundations of adjuster backlight adjusts the brightness of backlight 102.As a rule, when adjuster 170 received display mode MODE backlight are animation mode, can corresponding turn down the brightness of backlight 102.And when adjuster 170 received display mode MODE backlight are static schema, can corresponding heighten the brightness of backlight 102
What deserves to be mentioned is that the display mode MODE that detection and automatic switch-over circuit 120 set also can directly be sent to adjuster 170 backlight and make the adjuster 170 corresponding brightness of adjusting backlight 102 backlight.Why mention display mode MODE in the present embodiment and be that by the reason that control working storage 130 is sent to adjuster 170 backlight user or deviser also can assign the brightness that control command is adjusted backlight 102 by host side 101.Therefore, control working storage 130 can integrate that (one is display mode MODE about the brightness adjustment order of backlight 102 from two aspects, the control command that another is assigned for host side 101), adjust best backlight 102 brightness to transmit suitable order to adjuster 170 backlight.
For instance, when control working storage 130 receives simultaneously from detecting and during order that the backlight brightness of automatic switch-over circuit 120 and host side 101 is adjusted, the brightness of the backlight 102 that can set according to host side 101 is that benchmark is adjusted.For instance, when display mode MODE is static schema, backlight 102 brightness that the brightness of the backlight of setting with the user 102 is.And when display mode MODE was animation mode, then the brightness of the backlight of setting with the user 102 be multiply by one less than 1 proportional numers (as 80%), adjusted backlight 102 brightness.
Please refer to Figure 1A in addition, Figure 1A illustrates the detection of the embodiment of the invention and an embodiment synoptic diagram of automatic switch-over circuit 120.In the present embodiment, detection and automatic switch-over circuit 120 comprise detection counter 121 and mode switch 122.Detection counter 121 is in order to the update mode every a setting-up time cycle detection image information IM, and changes and produce count results CNT according to the update mode that is detected.Mode switch 122 couples detection counter 121 and comes setting display mode MODE according to count results CNT is animation mode or static schema.
The detection mode of the renewal frequency that is updated for the image information IM that more clearly demonstrates the embodiment of the invention, and the establishing method of display mode, below reintroduce an embodiment and be illustrated, in the hope of making the present invention according to knowing that usually the knowledgeable can more understand characteristics of the present invention.
Below please refer to Fig. 2 A and 2B, Fig. 2 A and 2B illustrate the detection of the embodiment of the invention and the action flow chart of automatic switch-over circuit 120.Please refer to Fig. 2 A, at first, detection and automatic switch-over circuit 120 detect in the setting-up time update mode of the image information in the image information memory 140 (step S210).The detection of this update mode can detect in setting-up time, and whether image information memory 140 produces write activity, or detects further whether the image information in the image information memory 140 has change to carry out in setting-up time.And what need to pay special attention to is do not write down the number of times that image information is upgraded in the setting-up time among the step S210, but only recording image information to have or not and is updated.
Detection and automatic switch-over circuit 120 and judgement are in setting-up time, image information has or not and is updated (step S220), image information is not updated in setting-up time if detection and automatic switch-over circuit 120 are judged, countdown result (step S230) then, and execution in step S210 again.On the other hand, image information has been updated in setting-up time if detection and automatic switch-over circuit 120 are judged, and detection and 120 of automatic switch-over circuits judge that then whether count results is more than or equal to the higher limit that had before configured (step S240).At this moment, if detect and automatic switch-over circuit 120 when judging count results, then increase progressively count results less than higher limit.Between execution in step S220 and step S230, detection and automatic switch-over circuit 120 lasting detection count results have or not and are less than or equal to pre-set lower limit (step S270).In case detect count results when being less than or equal to pre-set lower limit, detect and 120 of automatic switch-over circuits to switch display mode be static schema (step S280).
Then please refer to Fig. 2 B, wherein step S240 and the S250 that illustrates among step S240 that illustrates among Fig. 2 B and S250 and Fig. 2 A is identical, is for illustrating of can clearer binding Fig. 2 A, 2B having carried out repeating, and proposes explanation earlier at this.When step S240 judges count results is during greater than the higher limit that before configured, detect and automatic switch-over circuit 120 to switch display modes be animation mode (step S260).
Subsidiary one carry be, when detect and automatic switch-over circuit 120 detect count results finish more than or equal to higher limit and display mode switch to animation mode after, the action that count value stops to increase progressively.Relative, when detect and automatic switch-over circuit 120 detect count results be less than or equal to lower limit and display mode finish switch to static schema after, the action that count value stops to successively decrease.Can effectively avoid the phenomenon of count value generation overflow or underflow (overflow or underflow) thus.
Below please be simultaneously with reference to Fig. 1, Fig. 2 A, 2B.The motion flow of the automatic switch-over circuit 120 that Fig. 2 A, 2B are illustrated can also be avoided the excessive display mode MODE that switches at once of renewal frequency of the image information IM of automatic switch-over circuit 120 in detecting image information memory 140.Thus, the automatic switch-over circuit 120 of the embodiment of the invention just can effectively be avoided because of host side 101 under the condition of using owing to the limited frequency range of image information memory 140, be not to write image information memory 140 uniformly, and produce the change action of continuous display mode MODE.
Then please refer to Fig. 3, Fig. 3 illustrates the process flow diagram of the method for controlling backlight thereof of one embodiment of the invention.Its step comprises: at first, and the renewal frequency of stored image information (step S310) in the detected image information-storing device.Then, according to renewal frequency to set in order to adjust the display mode (step S320) of backlight brightness.And, detailed description has been arranged in the embodiment of aforesaid backlight control apparatus 100 all about the detection of renewal frequency and the change action of display mode, below do not give unnecessary details for this reason.
In sum, the present invention utilize image information in the detected image information-storing device be updated frequency judge display panel shown be dynamic image or still image.And corresponding setting display mode is with the brightness of dynamic adjustment backlight.Effectively when saving backlight power consumption, take into account the quality that image shows.
Though the present invention discloses as above with embodiment; yet it is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; change and retouching when doing some, so protection scope of the present invention should be with appended being as the criterion that claim was defined.
Claims (9)
1. backlight control apparatus, the brightness in order to the control backlight comprises:
Image information memory is in order to store images information; And
Detect and automatic switch-over circuit, couple this picture signal storer, in order to detecting the renewal frequency that this image information is updated, this detection and automatic switch-over circuit also according to this renewal frequency to set in order to adjust the display mode of this backlight brightness.
2. backlight control apparatus as claimed in claim 1, wherein this detection and automatic switch-over circuit comprise:
Detection counter every the update mode of this image information of setting-up time cycle detection, and changes count results according to this update mode; And
Mode switch couples this detection counter, and setting this display mode according to this count results is animation mode or static schema.
3. backlight control apparatus as claimed in claim 2, wherein this detection counter detects when this image information is not updated in this setting-up time, this count results of successively decreasing if this detection counter detects when this image information has been updated in this setting-up time, then increases progressively this count results.
4. backlight control apparatus as claimed in claim 3, wherein this mode switch is in this count results during more than or equal to a higher limit, switching this display mode is this animation mode, when this mode switch was less than or equal to a lower limit in this count results, switching this display mode was this static schema.
5. method for controlling backlight thereof, the brightness in order to the control backlight comprises:
The renewal frequency of stored image information in the detected image information-storing device; And
According to this renewal frequency to set in order to adjust the display mode of this backlight brightness.
6. method for controlling backlight thereof as claimed in claim 5, wherein the step of the renewal frequency of stored image information comprises in the detected image information-storing device:
Every the update mode of this image information of setting-up time cycle detection, and change count results according to this update mode.
7. method for controlling backlight thereof as claimed in claim 6 wherein comprises with the step of setting in order to the display mode of adjusting this backlight brightness according to this renewal frequency:
Setting this display mode according to this count results is animation mode or static schema.
8. method for controlling backlight thereof as claimed in claim 7 wherein comprises according to the step that this update mode changes count results:
This detection counter detects when this image information is not updated in this setting-up time, and this count results of successively decreasing if this detection counter detects when this image information has been updated in this setting-up time, then increases progressively this count results.
9. method for controlling backlight thereof as claimed in claim 8, wherein setting this display mode according to this count results is that the step of animation mode or static schema comprises:
During more than or equal to a higher limit, switching this display mode is this animation mode in this count results; And
When this count results was less than or equal to a lower limit, switching this display mode was this static schema.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115769.XA CN102157133B (en) | 2010-02-12 | 2010-02-12 | Backlight control device and backlight control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010115769.XA CN102157133B (en) | 2010-02-12 | 2010-02-12 | Backlight control device and backlight control method |
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| CN102157133A true CN102157133A (en) | 2011-08-17 |
| CN102157133B CN102157133B (en) | 2014-06-11 |
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| CN201010115769.XA Expired - Fee Related CN102157133B (en) | 2010-02-12 | 2010-02-12 | Backlight control device and backlight control method |
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| CN103050108A (en) * | 2012-12-17 | 2013-04-17 | 华为终端有限公司 | Screen backlight dynamic adjustment method and user terminal |
| WO2015143966A1 (en) * | 2014-03-27 | 2015-10-01 | 努比亚技术有限公司 | Terminal display mode determining method and apparatus |
| CN105489174A (en) * | 2014-10-07 | 2016-04-13 | 群创光电股份有限公司 | Display device |
| CN108806620A (en) * | 2018-07-17 | 2018-11-13 | 苏州佳世达电通有限公司 | Luminance compensation method and its system |
| CN110060628A (en) * | 2019-04-17 | 2019-07-26 | 上海天马微电子有限公司 | Display driving method and device, driving chip and display device |
| 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 |
| CN111429850A (en) * | 2020-04-08 | 2020-07-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display method thereof |
| CN115116411A (en) * | 2022-05-17 | 2022-09-27 | 广西世纪创新显示电子有限公司 | Method for eliminating terminal screen flicker |
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| CN103050108A (en) * | 2012-12-17 | 2013-04-17 | 华为终端有限公司 | Screen backlight dynamic adjustment method and user terminal |
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| CN111429850A (en) * | 2020-04-08 | 2020-07-17 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display method thereof |
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| CN115116411A (en) * | 2022-05-17 | 2022-09-27 | 广西世纪创新显示电子有限公司 | Method for eliminating terminal screen flicker |
| CN115116411B (en) * | 2022-05-17 | 2023-08-04 | 广西世纪创新显示电子有限公司 | Method for eliminating terminal screen flicker |
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| CN102157133B (en) | 2014-06-11 |
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