CN101944328B - Backlight control method and device thereof - Google Patents
Backlight control method and device thereof Download PDFInfo
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- CN101944328B CN101944328B CN2009101495956A CN200910149595A CN101944328B CN 101944328 B CN101944328 B CN 101944328B CN 2009101495956 A CN2009101495956 A CN 2009101495956A CN 200910149595 A CN200910149595 A CN 200910149595A CN 101944328 B CN101944328 B CN 101944328B
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- backlight
- backlight control
- signal
- synchronization signal
- display synchronization
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Abstract
The invention relates to a backlight control method and a device thereof. The backlight control method comprises the following steps of: receiving a display synchronization signal; producing a backlight control signal according to the display synchronization signal; and driving a backlight source according to the backlight control signal. The backlight control device comprises a signal receiving circuit, a control circuit and a drive circuit, wherein the signal receiving circuit is used for receiving the display synchronization signal; the control circuit is coupled to the signal receiving circuit and is used for producing the backlight control signal according to the display synchronization signal; and the drive circuit is coupled to the control circuit and is used for driving the backlight source according to the backlight control signal.
Description
Technical field
The present invention relates to a kind of light source control mechanism, relate in particular to a kind of method and device thereof of backlight control.
Background technology
It is to be dynamic menu or tableaux that present known LCD detects the picture signal that is received in display frame; Therefore; Known technology must extra using other testing circuit, storer or apparatus for temporary storage judge with more previous picture displayed whether the picture that is received at present is tableaux or dynamic menu; If be dynamic menu; Then the known technology backlight control that can start flashing type provides Backlight For Liquid Crystal Display Panels with display frame, yet so the backlight control mode can cause the burden of central processing unit/time schedule controller and data bus to increase; Add that extra testing circuit and data bus also are very devices of power consumption, therefore adopt the method can consume many electric power.
Summary of the invention
In view of this; One of the object of the invention is to provide a kind of method and device thereof of backlight control; With the solution problem that known technology was faced, and improve the problem of the display quality of dynamic menu with solution image retention (image residue) or fuzzy (blur).
According to one embodiment of the invention, it provides a kind of method of backlight control.This method includes reception one display synchronization signal; Produce a backlight control signal according to this display synchronization signal; And drive a backlight according to this backlight control signal.
According to another embodiment of the present invention, it provides a kind of device of backlight control.This device includes a signal receiving circuit, is used for receiving a display synchronization signal; One control circuit is coupled to this signal receiving circuit, is used for producing a backlight control signal according to this display synchronization signal; And one drive circuit, be coupled to this control circuit, be used for driving a backlight according to this backlight control signal.
Description of drawings
Fig. 1 is the process flow diagram of an embodiment of the method for backlight control of the present invention.
Fig. 2 is the functional block diagram of an embodiment of the device of backlight control of the present invention.
Fig. 3 is the functional block diagram figure of another embodiment of the device of backlight control of the present invention.
Fig. 4 is the sequential chart of display synchronization signal and backlight control signal.
[main element symbol description]
| 200、300 | |
| 202 | |
| 204、304 | |
| 2042 | |
| 3042 | |
| 206 | |
| 208 | |
| 210 | Display module |
| Case number | ILI-P0019-T WN | Reference number of a |
2 |
| Department's code name | Div?3.2 | Employee number | E0900019 |
| Content | Claim?draft | The author | Carlos?Lee |
| Connect certainly | Bibbo?Chiu | Hand over extremely | Bibbo?Chiu |
| Connect case day | 2007/10/30 | Accomplish day | 2007/11/19 |
Embodiment
In the middle of instructions and appending claims, used some vocabulary to censure specific element.Those skilled in the art should understand, and hardware manufacturer may be called same element with different nouns.This instructions and appending claims are not used as distinguishing the mode of element with the difference of title, but the criterion that is used as distinguishing with the difference of element on function.Be an open term mentioned " comprising " in the middle of instructions and the appending claims in the whole text, so should be construed to " comprise but be not limited to ".In addition, " couple " speech and comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to one second device, then represent this first device can directly be electrically connected in this second device, or be electrically connected to this second device through other devices or the intersegmental ground connection of connection hand if describe one first device in the literary composition.
Please refer to Fig. 1, Fig. 1 is the process flow diagram of an embodiment of the method for backlight control of the present invention.The running of backlight control is summarized as follows, and is as shown in Figure 1, at first, in step 102, receives a display synchronization signal (for example horizontal-drive signal and/or vertical synchronizing signal); Then, in step 104, produce a backlight control signal according to this display synchronization signal; It should be noted that; In a preferred embodiment of the present invention, the running that produces the step of this backlight control signal can produce this backlight control signal via this display synchronization signal of frequency division in addition, on the other hand; The running of above-mentioned frequency division can come this display synchronization signal is carried out frequency division to produce required backlight control signal according to driving this switching frequency of constantly switching between a plurality of different brightness output states that comes from backlight; Wherein above-mentioned a plurality of brightness output states include complete bright state of a backlight and the complete dark state of a backlight, yet this is only as the example explanation; Be not to be used as restrictive condition of the present invention; Therefore, in step 106, just drive a backlight and correspond to a plurality of brightness output states and reach the purpose that backlight illumination is controlled according to this backlight control signal.It should be noted that; The running of above-mentioned frequency division utilizes the periodic signal (that is display synchronization signal) of frequency reducing one upper frequency to produce the drive signal of a lower frequency; So that suitably controlling backlight improves the display quality of dynamic menu and solves image retention (image residue) or the problem of fuzzy (blur); For instance, the complete bright or complete dark state of this backlight utilization is to lower the intermediate state reaction of human eye to moving image.
Please note; Divide operation can operate any feasible mode and realize, for instance, and in one embodiment; Divide operation in the step 104 counter capable of using (counter) calculates each cycle of this display synchronization signal; And when count value reaches a critical value, carry out level switching (toggle), thus, via the suitable design of this critical value; Just can reach this display synchronization signal of frequency division and produce of the driving of required backlight control signal with the control backlight; For instance, if backlight must constantly switch, then can come suitably to set the critical value of above-mentioned count value between a plurality of different brightness output states according to the switching frequency of a plurality of different brightness output states.Note that and utilize counter to realize that divide operation only as the usefulness of example explanation, is not to be used as restrictive condition of the present invention.
Please refer to Fig. 2, Fig. 2 is the synoptic diagram of device 200 of the backlight control of one embodiment of the invention.As shown in Figure 2, device 200 includes a signal receiving circuit 202, is used for receiving a display synchronization signal S1; One control circuit 204 is coupled to signal receiving circuit 202, is used for producing a backlight control signal S2 according to display synchronization signal S1; One display module 210 is used for according to display synchronization signal S1 display frame (frame), and wherein this picture can be a dynamic menu (motion frame) or a tableaux (static frame); One backlight (that is backlight module) 208 is used to provide the required light source of display module (for example display panels) 210; One drive circuit 206 is coupled to control circuit 204, is used for driving backlight 208 according to backlight control signal S2.In a preferred embodiment; Display module 210 is undersized display panels; Therefore driving circuit 206 is just controlled backlight 208 constantly switching between complete bright state of a backlight and the complete dark state of a backlight according to backlight control signal S2; In addition; Frequency unit 2042 other foundations drive backlight 208 continuous switching frequency of switching between a plurality of different brightness output states and come frequency division display synchronization signal S1 to produce desired backlight control signal S2, and wherein these a plurality of brightness output states include complete bright state of a backlight and the entirely dark state of a backlight.
Note that above-mentioned frequency unit 2042 can use any element with division function and come in addition real the work.Please refer to Fig. 3, Fig. 3 is the synoptic diagram of device 300 of the backlight control of another embodiment of the present invention.As shown in Figure 3, device 300 includes signal receiving circuit 202; One control circuit 304; Driving circuit 206; Backlight 208; And display module 210.Device 300 is that with the main difference part of device 200 control circuit 304 uses counters 3042 to make the frequency unit 2042 shown in Fig. 2 in fact.Because the running of other elements and function are in last detailed description, so do not give unnecessary details at this in addition in the device 300.
Fig. 4 is the sequential chart of display synchronization signal S1 and backlight control signal S2.As shown in Figure 4, display synchronization signal S1 is device 20 original cyclical signals that receive (it has upper frequency), and backlight control signal S2 to be display synchronization signal S1 get via the running of the frequency division shown in the foregoing description frequency division; In this embodiment, it is 3 that frequency division operates pairing Frequency Dividing Factor, therefore; Obviously, the frequency F1 of backlight control signal S2 is less than the frequency F2 of display synchronization signal S1, wherein F2=3xF1; In other words; The cycle of backlight control signal S2, thus, driving circuit 206 just can be controlled the driving of backlight 208 with reference to backlight control signal S2 greater than the cycle of display synchronization signal S1.Therefore, the method for the disclosed backlight control of the present invention and install complete bright or complete dark state capable of using to lower the intermediate state reaction of human eye to moving image.Note that because those skilled in the art should understand its content easily after reading the foregoing description open, so further explain and just repeat no more in this omission.
In sum; The method of the disclosed a kind of backlight control of the present invention and device thereof are to improve the display quality of dynamic menu to solve the problem of image retention (image residue) or fuzzy (blur); In other words; The method of the disclosed a kind of backlight control of the present invention and device attenuating human eye thereof react the intermediate state of moving image and improve display quality, and can increase the resolution of picture, and it is more clear to let dynamic menu show.
The above is merely the preferred embodiments of the present invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (4)
1. the method for a backlight control includes:
Receive a display synchronization signal;
Produce a backlight control signal according to this display synchronization signal; And
Drive a backlight according to this backlight control signal,
Come this display synchronization signal of frequency division to produce this backlight control signal according to driving this backlight continuous switching frequency of switching between a plurality of different brightness output states.
2. the method for claim 1, wherein these a plurality of brightness output states include complete bright state of a backlight and the complete dark state of a backlight.
3. the device of a backlight control includes:
One signal receiving circuit is used for receiving a display synchronization signal;
One control circuit is coupled to this signal receiving circuit, is used for producing a backlight control signal according to this display synchronization signal; And
One drive circuit is coupled to this control circuit, is used for driving a backlight according to this backlight control signal;
One frequency unit is used for this display synchronization signal of frequency division to produce this backlight control signal,
Wherein this frequency unit in addition backlightly comes from switching frequency and come this display synchronization signal of frequency division to produce this backlight control signal of constantly switching between a plurality of different brightness output states according to driving this.
4. device as claimed in claim 3, wherein these a plurality of brightness output states include complete bright state of a backlight and the complete dark state of a backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101495956A CN101944328B (en) | 2009-07-06 | 2009-07-06 | Backlight control method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101495956A CN101944328B (en) | 2009-07-06 | 2009-07-06 | Backlight control method and device thereof |
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| Publication Number | Publication Date |
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| CN101944328A CN101944328A (en) | 2011-01-12 |
| CN101944328B true CN101944328B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101495956A Expired - Fee Related CN101944328B (en) | 2009-07-06 | 2009-07-06 | Backlight control method and device thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096844A (en) * | 2015-08-20 | 2015-11-25 | 武汉华星光电技术有限公司 | Panel and electronic device |
| CN106652919A (en) * | 2016-09-09 | 2017-05-10 | 青岛海信电器股份有限公司 | Image display method and display apparatus |
| CN107068068B (en) * | 2017-02-15 | 2019-04-12 | 明基智能科技（上海）有限公司 | Display system and the method for showing image |
| CN107632394A (en) * | 2017-09-21 | 2018-01-26 | 上海闻泰电子科技有限公司 | Remove the method and device that LCD in VR shows twilight sunset |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983366A (en) * | 2005-12-16 | 2007-06-20 | 财团法人工业技术研究院 | Display device with dynamically-flashing negative light, its controlling method and controller |
| CN101154353A (en) * | 2006-09-29 | 2008-04-02 | 群康科技(深圳)有限公司 | LCD and its driving circuit |
| CN101192376A (en) * | 2006-11-30 | 2008-06-04 | 株式会社东芝 | Backlight control apparatus, dislay device, and method for controlling backlight of display device |
| CN101202017A (en) * | 2006-12-13 | 2008-06-18 | 恩益禧电子股份有限公司 | Backlight brightness control for liquid crystal display panel |
-
2009
- 2009-07-06 CN CN2009101495956A patent/CN101944328B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1983366A (en) * | 2005-12-16 | 2007-06-20 | 财团法人工业技术研究院 | Display device with dynamically-flashing negative light, its controlling method and controller |
| CN101154353A (en) * | 2006-09-29 | 2008-04-02 | 群康科技(深圳)有限公司 | LCD and its driving circuit |
| CN101192376A (en) * | 2006-11-30 | 2008-06-04 | 株式会社东芝 | Backlight control apparatus, dislay device, and method for controlling backlight of display device |
| CN101202017A (en) * | 2006-12-13 | 2008-06-18 | 恩益禧电子股份有限公司 | Backlight brightness control for liquid crystal display panel |
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| Publication number | Publication date |
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| CN101944328A (en) | 2011-01-12 |
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