CN103594062A - Backlight module and driving method thereof - Google Patents
Backlight module and driving method thereof Download PDFInfo
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- CN103594062A CN103594062A CN201210295745.6A CN201210295745A CN103594062A CN 103594062 A CN103594062 A CN 103594062A CN 201210295745 A CN201210295745 A CN 201210295745A CN 103594062 A CN103594062 A CN 103594062A
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Abstract
The invention discloses a backlight module for a display device. The backlight module comprises a determination module for generating a determination result according to the display content of the display device, a storage module for storing multiple starting time working signals, and an output module in coupling connected with the determination module and the storage module for outputting one of the multiple starting time working signals according to the determination result so as to enable the display device to stably display the display content.
Description
Technical field
The present invention relates to a kind of backlight module and driving method thereof, relate in particular to a kind of can be according to the one in a plurality of opening time working signals of the corresponding output of a displaying contents of a display device, to stablize backlight module and the driving method thereof of displaying contents.
Background technology
Along with image technology is constantly progressive, the size of the display device that consumer can select and function are day by day polynary, and in order to meet different user's demands, the manufacturer of each family's display device also manages to provide output usefulness and the better new product of resolution.One of topic wherein meriting attention most, is and how processes picture ghost (Motion blur) and scintillation effect (Flashing).For the small size display device of using flicker backlight (Flashing backlight), or only include the display device of single backlight, because this display device is only used single light source and is carried out imaging, influence degree to a display frame of display device will be more obvious, especially for example, when the corresponding background luminance of display frame is when higher (in the situation environment under a sun), user will be easier to experience scintillation effect, be that display frame is less obvious for the persistence of vision of human eye, the light and shade that makes human eye can experience relatively easily display frame changes.Accordingly, user will produce in visually discomfort, more can affect user's the quality of viewing and admiring, and further limit small size or use the product of the display device of flasher to apply.
Therefore, a kind of more efficient backlight module and driving method thereof are provided, be directed to small size display device under Different background illumination or use the display device of flasher, avoid the possibility of its display frame generation scintillation effect, become the important topic of this area.
Summary of the invention
Therefore, fundamental purpose of the present invention be to provide a kind of can be according to a displaying contents of a display device, the one in a plurality of opening time working signals of corresponding output, to stablize backlight module and the driving method thereof of displaying contents.
The present invention discloses a kind of backlight module for a display device, includes a judge module, is used for, according to a displaying contents of this display device, producing a judged result; One memory module, is used for storing a plurality of opening time working signals; One output module, is coupled to this judge module and this memory module, is used for according to this judged result, exports the one in the plurality of opening time working signal, makes stable this displaying contents that shows of this display device.
The present invention also discloses a kind of method that is used for driving a backlight module, this backlight module is for a display device, and this backlight module stores a plurality of opening time working signals, the method includes the displaying contents according to this display device, produces a judged result; And according to this judged result, export the one in the plurality of opening time working signal, make stable this displaying contents that shows of this display device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention one backlight module.
Fig. 2 is the detailed maps of memory module in Fig. 1.
Fig. 3 is the schematic diagram of the corresponding frame signal of a displaying contents in the embodiment of the present invention.
Fig. 4 is the process flow diagram that the embodiment of the present invention one backlight module drives flow process.
Fig. 5 is the process flow diagram of the embodiment of the present invention one flicker parameter adjustment flow process.
Fig. 6 is the process flow diagram of the embodiment of the present invention one Dynamic parameter adjustment flow process.
Wherein, description of reference numerals is as follows:
10 backlight modules
100 judge modules
102 memory modules
102_1～102_m storage unit
104 output units
40 backlight modules drive flow process
400,402,404,406,408,500,502, step
504、506、508、510、600、602、604、
606
50 flicker parameter adjustment flow processs
60 Dynamic parameter adjustment flow processs
1～Y opens work
S_C displaying contents
S_D judged result
S_F frame signal
S_ON1～S_ONm opening time working signal
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram of the embodiment of the present invention one backlight module 10, and wherein backlight module 10 is to be arranged in a display device (not shown), or both couple mutually, makes backlight module 10 can control the output situation of display device.As shown in Figure 1, backlight module 10 includes a judge module 100, a memory module 102 and an output module 104.Judge module 100, according to a displaying contents S_C of display device, produces a judged result S_D.Memory module 102 stores opening time work (On time duty) signal S_ON1～S_ONm.Output module 104 is coupled to judge module 100 and memory module 102, and according to judged result S_D, the one (being S_ONx) in corresponding output opening time working signal S_ON1～S_ONm, can stablize display device and show a displaying contents.
Preferably, the judge module 100 of the present embodiment utilizes a Histogram statistics (histogram) technology, and displaying contents S_C is converted to judged result S_D.Displaying contents S_C is that a plurality of pixel cell (not shown) by display device carry out imaging, as for Histogram statistics technology, should be well known to those skilled in the art, it can be according to the different relative position in a plurality of pixel cells place of imaging displaying contents S_C, corresponding calculate displaying contents S_C in specific phase to locational imaging situation, for example, in pixel cell (100,120) a GTG value is that the corresponding maximal value of 150(is 255), and further judge whether this pixel cell meets an implied terms, produce judged result S_D and transfer to output module 104.
Notably, the displaying contents S_C of display device can pass through a luminance parameter, flicker parameter and a dynamic parameter, the corresponding output situation of adjusting displaying contents S_C, in the case, user can, according to required displaying contents S_C in different situation environment, preset above-mentioned implied terms, or also capable of dynamic be adjusted above-mentioned implied terms, to select suitable flicker parameter and dynamic parameter, export the displaying contents S_C that user wants.Preferably, the size of luminance parameter represents the bright dark degree of displaying contents S_C, if luminance parameter is larger, displaying contents S_C is brighter, if luminance parameter is less, displaying contents S_C is darker.The size of flicker parameter represents the flicker level of displaying contents S_C, if flicker parameter is larger, displaying contents S_C flicker is more obvious, if flicker parameter is less, displaying contents S_C flicker is more not obvious.The size of dynamic parameter represents the shaking degree of displaying contents S_C, if dynamic parameter is larger, displaying contents S_C rocks more obviously, if dynamic parameter is less, displaying contents S_C rocks more not obvious.In simple terms, the output module 104 of the present embodiment, the judged result S_D producing according to judge module 100, one in corresponding output opening time working signal S_ON1～S_ONm, to adjust the corresponding flicker parameter of displaying contents S_C and dynamic parameter, displaying contents S_C can be stablized and be shown in display device.
Please refer to Fig. 2, Fig. 2 is the detailed maps of memory module 102 in Fig. 1.As shown in Figure 2, memory module 102 also includes storage unit 1021～102m, is used for the corresponding opening time working signal S_ON1～S_ONm of storage.Certainly, those skilled in the art also can revise the mode that memory module 102 stores opening time working signal S_ON1～S_ONm, for example can utilize a look-up table, or utilize an adjustment unit and first give tacit consent to and have an acquiescence opening time working signal, adaptive ground is according to the different demands of user, exporting the numerical value of look-up table or export adjusted acquiescence opening time working signal person, is also category of the present invention.
Please refer to Fig. 3, Fig. 3 is the schematic diagram of the corresponding frame signal S_F of a displaying contents S_C in the embodiment of the present invention, and wherein a plurality of frame signal S_F can form displaying contents S_C.As shown in Figure 3, frame signal S_F can correspond to working hour opening time, and working hour opening time also includes plural number and time repeats unlatching work, be with symbol 1～Y, to represent the number of times of unlatching work in the present embodiment, as for being separated with one between all in every twice unlatching work, close work.Preferably, one in opening time working signal S_ON1～S_ONm that output module 104 is exported, to can be used to the corresponding length of adjusting working hour opening time of frame signal S_F, adjust an opening time or a shut-in time of backlight module 10, to be decided by the output content S_C of imaging in display device.
In general, first carry out the comparison of luminance parameter and a default value, bright dark situation with judgement output content S_C, for example can judge whether output content S_C is a sun direct projection background or a night scene, and the setting of default value is the demand capable of dynamic adjustment according to user, non-in order to limit category of the present invention.When luminance parameter is greater than default value and output module 104 is in output opening time working signal S_ON1～S_ONm during the greater, can reduce flicker parameter to make displaying contents S_C flicker more not obvious; When luminance parameter is greater than default value and output module 104 is in output opening time working signal S_ON1～S_ONm during smaller, can increase flicker parameter and make displaying contents S_C flicker more obvious.In addition, when luminance parameter is less than default value and output module 104 is in output opening time working signal S_ON1～S_ONm during the greater, the size that can maintain flicker parameter,, for user, whether the flicker situation that cannot discover easily displaying contents S_C changes; When luminance parameter is less than default value and output module 104 is in output opening time working signal S_ON1～S_ONm during smaller, also can maintain the size of flicker parameter.As for, when output module 104 is in output opening time working signal S_ON1～S_ONm during the greater, can increasing dynamic parameter, that displaying contents S_C is rocked is more obvious; When output module 104 is in output opening time working signal S_ON1～S_ONm during smaller, can reducing dynamic parameter, that displaying contents S_C is rocked is more not obvious.
In simple terms, the judge module 100 of the present embodiment can judge the luminance parameter of displaying contents S_C, for example, when displaying contents S_C is sun direct projection background, reduce the size of opening time working signal, user will easily discover the flicker situation of displaying contents S_C, otherwise, the size of increase opening time working signal, user will be not easy to discover the flicker situation of displaying contents S_C.In addition, if when displaying contents S_C is night scene, no matter be the size that increases or reduce opening time working signal, the neither flicker situation of easily discovering displaying contents S_C of user.In addition, judge module 100 also can judge the dynamic parameter of displaying contents S_C, and then judges whether to change the size of current opening time working signal; Increase opening time working signal, user will easily discover the situation of rocking of displaying contents S_C, otherwise, reducing opening time working signal, user will be not easy to discover the situation of rocking of displaying contents S_C.Accordingly, user can judge luminance parameter, flicker parameter and dynamic parameter by judge module 100 simultaneously, and the one in adaptive output opening time working signal S_ON1～S_ONm, exports suitable displaying contents S_C in display device with correspondence.Certainly, those skilled in the art also can modulation in conjunction with other parameter, for example each opens the number of times of opening work in working hour, or adjust the work clock person of the frame signal of displaying contents S_C, to add suitable adjustment parameter to give tacit consent in memory module 102, it is also category of the present invention.
In the present embodiment, backlight module 10, in conjunction with the driving backlight module method that display device was suitable for, can further be summarized as a backlight module and drive flow process 40, as shown in Figure 4.Backlight module drives flow process 40 to comprise following steps:
Step 400: start.
Step 402: judge module 100 utilizes Histogram statistics technology, by the displaying contents S_C of display device
Be converted to judged result S_D, to transfer to output module 104.
Step 404: memory module 102 output opening time working signal S_ON1～S_ONm are to defeated
Go out module 104.
Step 406: output module 104, according to judged result S_D, is exported opening time working signal
One in S_ON1～S_ONm, to adjust flicker parameter and dynamic parameter,
Make the stable displaying contents S_C that shows of display device.
Step 408: finish.
In addition, in driving the step 406 of backlight module flow process 40, adjust flicker parameter and make the stable work that shows displaying contents S_C of display device, also can further be summarized as a flicker parameter adjustment flow process 50, as shown in Figure 5.Flicker parameter adjustment flow process 50 comprises following steps:
Step 500: start.
Step 502: compare the luminance parameter of displaying contents S_C and the size of default value, if displaying contents
When the luminance parameter of S_C is greater than default value, carry out step 504; If displaying contents
When the luminance parameter of S_C is less than default value, carry out step 508.
Step 504: if user's wish reduces the flicker situation of displaying contents S_C, output opening time work
Make the greater in signal S_ON1～S_ONm, otherwise carry out step 506.
Step 506: if user's wish increases the flicker situation of displaying contents S_C, the smaller in output opening time working signal S_ON1～S_ONm, continues step 510.
Step 508: the one in output module 104 output opening time working signal S_ON1～S_ONm.
Step 510: finish.
In addition, in driving the step 406 of backlight module flow process 40, adjust dynamic parameter and make the stable work that shows displaying contents S_C of display device, also can further be summarized as a Dynamic parameter adjustment flow process 60, as shown in Figure 6.Dynamic parameter adjustment flow process 60 comprises following steps:
Step 600: start.
Step 602: if user's wish reduces the situation of rocking of displaying contents S_C, output opening time work
Do the smaller in signal S_ON1～S_ONm, otherwise carry out step 604.
Step 604: if user's wish increases the situation of rocking of displaying contents S_C, the greater in output opening time working signal S_ON1～S_ONm.
Step 606: finish.
Backlight module drives the detailed operation of each step in flow process 40, flicker parameter adjustment flow process 50 and Dynamic parameter adjustment flow process 60, can to the relevant paragraph of Fig. 3, illustrate with reference to previous embodiment and Fig. 1, is not repeated herein.In addition, in step 508, because the luminance parameter of displaying contents S_C is to be less than default value, no matter now export the greater or the smaller in opening time working signal S_ON1～S_ONm, the neither flicker situation of easily discovering displaying contents S_C of user, therefore output module 104 only needs the one in adaptive output opening time working signal S_ON1～S_ONm.Certainly, user also can be according to the actual requirements, and in corresponding set-up procedure 508, the result of time service signal S_ON1～S_ONm is opened in output, is also category of the present invention.
Notably, in the present embodiment, judge module 100 may include respectively a luminance parameter judging unit, flicker parameter judging unit and a dynamic parameter judging unit.Luminance parameter judging unit is according to the bright dark degree of displaying contents S_C, further combined with flicker parameter judging unit, carry out backlight module and drive flow process 40 and flicker parameter adjustment flow process 50, to carry out follow-up work, and dynamic parameter judging unit is can carry out separately backlight module to drive flow process 40 and Dynamic parameter adjustment flow process 60.Certainly, judge module 100 also can be carried out backlight module simultaneously and drive flow process 40, flicker parameter adjustment flow process 50 and Dynamic parameter adjustment flow process 60, according to displaying contents S_C to produce judged result S_D, one in the corresponding output opening time working signal S_ON1～S_ONm of output module 104, non-in order to limit category of the present invention again.
In sum, the embodiment of the present invention is to provide a kind of backlight module and driving method thereof that is coupled to a display device, utilize a displaying contents of a judge module judgement display device, with correspondence, export the one in a plurality of opening time working signals, and then corresponding flicker parameter and the dynamic parameter of adjustment displaying contents, make displaying contents according to different luminance parameters, maybe can the person of being used in conjunction with different demands, make that displaying contents is stable to be output in display device.Be compared to known technology, the present embodiment is for the display device of undersized display device or use flasher, and adaptive ground reduces picture ghost and the scintillation effect of displaying contents, and then expands the range of application of display device.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (22)
1. for a backlight module for a display device, it is characterized in that, include:
One judge module, is used for, according to a displaying contents of this display device, producing a judged result;
One memory module, is used for storing a plurality of opening time working signals;
One output module, is coupled to this judge module and this memory module, is used for according to this judged result, exports the one in the plurality of opening time working signal, makes stable this displaying contents that shows of this display device.
2. backlight module as claimed in claim 1, it is characterized in that, this displaying contents also includes a luminance parameter, one flicker parameter and a dynamic parameter, wherein the size of this luminance parameter represents the bright dark degree of this displaying contents, this luminance parameter more this displaying contents is brighter, less this displaying contents of this luminance parameter is darker, the size of this flicker parameter represents the flicker level of this displaying contents, this flicker parameter more this displaying contents flicker is more obvious, less this displaying contents flicker of this flicker parameter is more not obvious, and the size of this dynamic parameter represents the shaking degree of this displaying contents, this dynamic parameter more this displaying contents is rocked more obvious, less this displaying contents of this dynamic parameter rocks more not obvious.
3. backlight module as claimed in claim 2, it is characterized in that, the plurality of opening time working signal and this luminance parameter that this output module is different according to output, adjust this flicker parameter and this dynamic parameter, makes stable this displaying contents that shows of this display device.
4. backlight module as claimed in claim 3, is characterized in that, when this luminance parameter is that to be greater than a default value and this output module be in the plurality of opening time working signal of output during the greater, reduces this flicker parameter, this displaying contents is glimmered more not obvious.
5. backlight module as claimed in claim 3, is characterized in that, when this luminance parameter is that to be greater than a default value and this output module be in the plurality of opening time working signal of output during smaller, increases this flicker parameter, this displaying contents is glimmered more obvious.
6. backlight module as claimed in claim 3, it is characterized in that, when this luminance parameter is that to be less than a default value and this output module be in the plurality of opening time working signal of output during the greater, maintain the size of this flicker parameter, to maintain the flicker situation of current this displaying contents.
7. backlight module as claimed in claim 3, it is characterized in that, when this luminance parameter is that to be less than a default value and this output module be in the plurality of opening time working signal of output during smaller, maintain the size of this flicker parameter, to maintain the flicker situation of current this displaying contents.
8. backlight module as claimed in claim 3, is characterized in that, when this output module is in the plurality of opening time working signal of output during the greater, increases this dynamic parameter, this displaying contents is rocked more obvious.
9. backlight module as claimed in claim 3, is characterized in that, when this output module is in the plurality of opening time working signal of output during smaller, reduces this dynamic parameter, this displaying contents is rocked more not obvious.
10. backlight module as claimed in claim 1, is characterized in that, this memory module also includes a plurality of storage unit, is used for the corresponding the plurality of opening time working signal that stores.
11. backlight modules as claimed in claim 1, is characterized in that, this judge module is to utilize a Nogata statistical technique, and this displaying contents is converted to this judged result.
12. 1 kinds of methods that are used for driving a backlight module, this backlight module is for a display device, and this backlight module stores a plurality of opening time working signals, it is characterized in that, the method includes: the displaying contents according to this display device, produces a judged result; And
According to this judged result, export the one in the plurality of opening time working signal, make stable this displaying contents that shows of this display device.
13. methods as claimed in claim 12, it is characterized in that, this displaying contents also includes a luminance parameter, one flicker parameter and a dynamic parameter, wherein the size of this luminance parameter represents the bright dark degree of this displaying contents, this luminance parameter more this displaying contents is brighter, less this displaying contents of this luminance parameter is darker, the size of this flicker parameter represents the flicker level of this displaying contents, this flicker parameter more this displaying contents flicker is more obvious, less this displaying contents flicker of this flicker parameter is more not obvious, and the size of this dynamic parameter represents the shaking degree of this displaying contents, this dynamic parameter more this displaying contents is rocked more obvious, less this displaying contents of this dynamic parameter rocks more not obvious.
14. methods as claimed in claim 13, is characterized in that, the plurality of opening time working signal and this luminance parameter that this output module is different according to output, adjust this flicker parameter and this dynamic parameter, make stable this displaying contents that shows of this display device.
15. methods as claimed in claim 14, it is characterized in that, also comprise when this luminance parameter be that to be greater than a default value and this backlight module be in the plurality of opening time working signal of output during the greater, reduce this flicker parameter, this displaying contents is glimmered more not obvious.
16. methods as claimed in claim 14, is characterized in that, also comprise when this luminance parameter be that to be greater than a default value and this backlight module be in the plurality of opening time working signal of output during smaller, increase this flicker parameter, this displaying contents is glimmered more obvious.
17. methods as claimed in claim 14, it is characterized in that, also comprise when this luminance parameter be that to be less than a default value and this backlight module be in the plurality of opening time working signal of output during the greater, do not affect the size of this flicker parameter, to maintain the flicker situation of current this displaying contents.
18. methods as claimed in claim 14, it is characterized in that, also comprise when this luminance parameter be that to be less than a default value and this backlight module be in the plurality of opening time working signal of output during smaller, do not affect the size of this flicker parameter, to maintain the flicker situation of current this displaying contents.
19. methods as claimed in claim 14, is characterized in that, also comprise when this backlight module be in the plurality of opening time working signal of output during the greater, increase this dynamic parameter, this displaying contents is rocked more obvious.
20. methods as claimed in claim 14, is characterized in that, also comprise when this backlight module be in the plurality of opening time working signal of output during smaller, reduce this dynamic parameter, this displaying contents is rocked more not obvious.
21. methods as claimed in claim 12, is characterized in that, also comprise and utilize the plurality of opening time working signal of the corresponding storage of a plurality of storage unit.
22. methods as claimed in claim 12, is characterized in that, also comprise and utilize a Nogata statistical technique, take and change this displaying contents as this judged result.
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