CN103839529A - Driving system and method of backlight source - Google Patents
Driving system and method of backlight source Download PDFInfo
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- CN103839529A CN103839529A CN201410064095.3A CN201410064095A CN103839529A CN 103839529 A CN103839529 A CN 103839529A CN 201410064095 A CN201410064095 A CN 201410064095A CN 103839529 A CN103839529 A CN 103839529A
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Abstract
The invention provides a driving system and method of a backlight source. The system specifically comprises M sets of backlight sources, N paths of driving circuits and a gating circuit, wherein each set of the backlight sources comprises N paths of backlight, M is an integer larger than or equal to 2, the N paths of backlight in each set of the backlight sources are connected with the N paths of the driving circuits respectively, and the gating circuit is connected with the M sets of the backlight sources and used for carrying out time sharing option on one set of the backlight sources in the M sets of the backlight sources so as to enable the one set of the backlight sources in the M sets of the backlight sources to be driven by the N paths of the driving circuits to emit light in one scanning cycle. According to the system and method, the number of the driving circuits can be reduced.
Description
Technical field
The application relates to backlight drive technical field, particularly relates to a kind of drive system and method for backlight.
Background technology
In existing liquid crystal indicator, the light source that liquid crystal panel need to provide by backlight is show image normally, and light emitting diode (LED, Light Emitting Diode) becomes the main flow of backlight.
At present, scanning (scanning backlight) technology of backlight is usually used in improving backlight characteristic and moving image quality problem, its principle is for to be divided into multiple regions by liquid crystal indicator according to horizontal zone, and in arbitrary region, the transition period that is chosen in liquid crystal molecule is closed corresponding backlight; Due to liquid crystal molecule the transition period show unstable cause image show fuzzy, in the time that backlight corresponding to liquid crystal molecule closed, the liquid crystal molecule transition period does not show image, and now because human eye has done normal response to previous image, therefore can avoid the appearance of motion image blurring phenomenon, thereby can promote the sharpness of image frame, improve display comparison degree simultaneously.
With reference to Fig. 1, show the drive system schematic diagram in a kind of LED-backlit of prior art source, it specifically can comprise: LED-backlit source, treatment circuit, feedback circuit, DC-DC (DC/DC) circuit and the driving circuit arranging for every paths of LEDs backlight, wherein, described LED-backlit source specifically can comprise: LED1, LED2, LED3, LED4, LED5, the corresponding LED multi-path backlight in the numbers such as LED6 and backlight subarea, described driving circuit is respectively equipped with corresponding driver module for every paths of LEDs backlight, wherein every road driving circuit specifically can comprise pulse-length modulation (PWM, Pulse Width Modulation) (in figure, mark PWM1, PWM2, PWM3, PWM4, PWM5, PWM6) circuit, field-effect transistor and driving resistance etc., described treatment circuit is mainly used in controlling PWM output and carries out feedback voltage processing, in the process of scanning backlight, DC/DC circuit is adjusted to suitable magnitude of voltage according to the feedback voltage of feedback circuit output by the driving voltage VLED in above-mentioned LED-backlit source.
Because prior art shown in Fig. 1 need to be respectively equipped with corresponding driving circuit for every paths of LEDs backlight, therefore along with increasing of backlight subarea, the drive system in LED-backlit source also needs to be provided with the driving circuit of respective number, not only increase the complicacy of circuit system, and expended a large amount of driving costs.
Summary of the invention
The application's technical matters to be solved is to provide a kind of drive system and method for backlight, can reduce the number of driving circuit.
In order to address the above problem, the application discloses a kind of drive system of backlight, comprising:
M organizes backlight, and wherein, every group of backlight comprises that N road is backlight, and described M is more than or equal to 2 integer;
N road driving circuit, wherein, N road in described every group of backlight is backlight to be all connected with described N road driving circuit respectively;
Gating circuit, is connected with described M group backlight, and within a scan period, timesharing selects one group of backlight in described M group backlight to drive luminous by described N road driving circuit.
Preferably, described system also comprises on-off circuit, described on-off circuit is connected with described gating circuit and described M group backlight respectively, for when one group of backlight of described gating circuit gating, selects described group of N backlight and described road, the N road driving circuit connection in backlight.
Preferably, peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is greater than non-Time share scanning.
Preferably, scanning frame per second when the described Time share scanning corresponding scanning of mode backlight frame per second is greater than non-Time share scanning.
The M of peak current value when preferably, described driving circuit Wei Mei road, the every road peak current value providing backlight is non-Time share scanning doubly.
Preferably, when the described Time share scanning corresponding scanning of mode backlight frame per second is non-Time share scanning, the M of corresponding scanning frame per second doubly.
On the other hand, the application also provides a kind of driving method of backlight, and the method is within a scan period, and timesharing selects one group of backlight in M group backlight to drive luminous by N road driving circuit;
Wherein, every group of backlight comprises that N road is backlight, and N road in described every group of backlight is backlight to be all connected with described N road driving circuit respectively; Described M is more than or equal to 2 integer.
Preferably, described timesharing selects one group of backlight in described M group backlight to drive luminous step to comprise by described N road driving circuit: by the on-off circuit being connected with described gating circuit and described M group backlight respectively, in the time of one group of backlight of described gating circuit gating, select described group of N backlight and described road, the N road driving circuit in backlight to connect.
Preferably, peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is greater than non-Time share scanning.
Preferably, scanning frame per second when the described Time share scanning corresponding scanning of mode backlight frame per second is greater than non-Time share scanning.
Compared with prior art, the application has the following advantages:
Backlight is divided into M group by the application, wherein every group specifically comprises that N road is backlight, design N road driving circuit simultaneously, N road in every group of backlight is backlight to be all connected with described N road driving circuit respectively, and set up gating circuit within a scan period, timesharing selects one group of backlight in M group backlight to connect described N road driving circuit, because timesharing gating can drive luminous by described N road driving circuit by the different group backlight of different period gatings within a scan period, therefore N road driving circuit can timesharing drive the corresponding M*N of M group backlight road backlight within a scan period, therefore, need to be for every road situation that is provided with corresponding driving circuit backlight with respect in prior art, the application can greatly reduce the number of driving circuit, thereby can reduce the complicacy of circuit system, and can save the driving cost of system.
Accompanying drawing explanation
Fig. 1 is the drive system schematic diagram in a kind of LED-backlit of prior art source;
Fig. 2 is the structural drawing of the drive system of the backlight that provides of the embodiment of the present application one;
Fig. 3 is the structural representation of the drive system in a kind of LED-backlit of the application source;
Fig. 4 is the grouping schematic diagram of a kind of LED lamp of the application bar;
Fig. 5 is the control sequential schematic diagram of a kind of Time share scanning of the application.
Embodiment
For the above-mentioned purpose, the feature and advantage that make the application can become apparent more, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
In the embodiment of the present application, Time share scanning mode backlight is also periodically carried out gating to M group backlight respectively and is lighted; N road in each group backlight is backlight is simultaneously also to light successively at a certain time interval.Because liquid crystal indicator is in the time showing image, whole pixels of each two field picture are also according to from top to bottom, from left to right (or from top to bottom, order point by point scanning from right to left) completes, as long as so can guarantee all to light successively in the time of all having scanned in whole pixels of a two field picture backlight of all M*N road, just can guarantee to open liquid crystal molecule the backlight of correspondence position in upset, to reach the requirement of scanning backlight, therefore can avoid the appearance of motion image blurring phenomenon, thereby can promote the sharpness of image frame, improve display comparison degree simultaneously.
Further, as long as control each road peak point current backlight and lighting the time well, utilize the persistence of vision effect of human eye, just can make backlight illumination and brightness of image reach human eye vision requirement, reach the effect of Time share scanning.
Embodiment mono-
With reference to Fig. 2, provide the structural drawing of the drive system of the backlight that the embodiment of the present application one provides, specifically can comprise:
M organizes backlight 201, and wherein, every group of backlight specifically can comprise at least N road backlight 211; Described M is more than or equal to 2 integer;
N road driving circuit 202, wherein, the N road backlight 211 in described every group of backlight is all connected with described N road driving circuit 202 respectively;
The embodiment of the present application can be applied in the various liquid crystal indicators with dynamic backlight function.
In order to reduce the number of the required driving circuit of backlight in liquid crystal indicator, backlight is divided into M group by the embodiment of the present application, wherein every group specifically comprises that N road is backlight, organize 201 backlight being connected of Zhong mono-tunnel of backlight with described M respectively for every group that designs in the driving circuit of N road simultaneously, and set up gating circuit, select one group of backlight in described M group backlight to drive luminous by described N road driving circuit by the timesharing within a scan period of this gating circuit 203; Because timesharing gating can drive luminous by described N road driving circuit by the different group backlight of different period gatings within a scan period, therefore N road driving circuit can timesharing drive the corresponding M*N of M group backlight road backlight within a scan period, therefore, with respect to the situation that need to be provided with for every paths of LEDs backlight corresponding driving circuit in prior art, the application can greatly reduce the number of driving circuit.
In the embodiment of the present application, described gating circuit 203 is mainly used in controlling the driving process of described M group backlight, it can be positioned at CPU, microprocessor (MCU, Micro Control Unit) etc. in processor, this processor can be realized by carrying out instruction a series of functions of described gating circuit 203.
In a preferred embodiment of the present application, described system can also comprise on-off circuit, described on-off circuit is connected with described gating circuit 203 and described M group backlight 201 respectively, for in the time of one group of backlight 201 of described gating circuit 203 gatings, select the described group of N road backlight 211 in backlight 201 to connect with described N road driving circuit 202.
In specific implementation, described gating circuit 203 can send gating circuit to described on-off circuit, and described on-off circuit can be according to gating signal, select one group of backlight 201 in described M group backlight 201 to connect described N road driving circuit 202, drive and light by described N road driving circuit 202 the N road that this group backlight of connected is corresponding backlight.
In actual applications, can pass through insulated gate bipolar transistor (IGBT, Insulated Gate Bipolar Transistor), metal-oxide half field effect transistor (MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor) etc. circuit realize the function of described on-off circuit, the embodiment of the present application is not limited the particular circuit configurations of described on-off circuit.
Select one group of backlight in described M group backlight to drive luminous by described N road driving circuit in order to control the timesharing within a scan period of described gating circuit 203, in a preferred embodiment of the present application, described gating circuit 203, can be specifically for according to Time share scanning mode backlight, generate the gating signal of one group of backlight in described M group backlight, and, control output and the start-up time of described N road driving circuit.
The Time share scanning mode of this preferred embodiment is specifically as follows, a scan period is divided into multiple sweep intervals, and take sweep interval as unit, carry out in turn the scanning of the corresponding group of each sweep interval backlight, to realize in the plurality of sweep interval interscan and to light described M group backlight 201.In specific implementation, can carry out according to the sequential packet of image scanning the Time share scanning of M group backlight, to reach the requirement of scanning backlight.
Provide at this detailed process that generates gating signal: described gating circuit 203 can be according to Time share scanning mode backlight, in multiple sweep intervals within a scan period, generate respectively the gating signal of one group of backlight in described M group backlight, and send to described on-off circuit; Wherein, the quantity of described sweep interval is identical with the group number of described backlight.
For example, in the time of M=2, a scan period can be divided into 2 sweep intervals, so, gating circuit 203 can be in the gating signal of the 1st group of backlight of the interior generation of the sweep interval of a scan period 1, now described on-off circuit can select the 1st group of backlight to connect described N road driving circuit 202, uses N road driving circuit the 1st group of backlight of the interior driving of sweep interval 1 a scan period therefore can realize; In like manner, gating circuit 203 can be in the gating signal of the 2nd group of backlight of the interior generation of the sweep interval of a scan period 2, now described on-off circuit can select the 2nd group of backlight to connect described N road driving circuit 202, uses N road driving circuit the 2nd group of backlight of the interior driving of sweep interval 2 a scan period therefore can realize; Therefore, can realize and use driving circuit timesharing within a scan period in N road to drive 2 groups of backlight 2N roads backlight.
Can find out, use driving circuit timesharing within a scan period in N road to drive M group backlight M*N road backlight for realizing, the application can be divided into M sweep interval by a scan period, and at the different group backlight of the interval internal gating of the different scanning of a scan period, use N road driving circuit in the sweep interval i of a scan period, to drive i group backlight thereby realize, wherein, 1≤i≤M.
Be appreciated that above-mentioned M=2 is just as the application's application example, in fact other M value (as M=3 or 4) that is greater than 2 is also feasible.
Provide and control the output of described N road driving circuit and the detailed process of start-up time at this: described gating circuit 203, can be specifically for according to Time share scanning mode backlight, control output and the start-up time of described N road driving circuit, make them in multiple sweep intervals of a scan period, open successively according to the scanning sequency time delay of connected backlight; Wherein, the quantity of described sweep interval is identical with the group number of described backlight.
For the backlight that makes whole LCD screen is evenly lighted, described gating circuit 203 can be controlled the start-up time of every road driving circuit 202, its scanning sequency time delay according to connected backlight is opened successively, wherein, described time delay can be determined according to actual conditions by those skilled in the art, and for example it can be for scanning time of spending of a line etc.Suppose M=2, N=3,1st, 2, No. 3 driving circuits 202 have respectively connected the 1st group and the 2nd group of backlight Zhong mono-tunnel, suppose that the 1st, 2, No. 3 driving circuits 202 have connected respectively backlight 1, backlight 2 and the backlight 3 in the 1st group of backlight, so, in the time of the 1st group of backlight of gating, can, according to the scanning sequency of backlight 1, backlight 2 and backlight 3 in described the 1st group of backlight, control the start-up time of described No. 3 driving circuits 202.
In a preferred embodiment of the present application, the unlatching of described N road driving circuit 202 can complete in single sweep interval.Wherein, certain road driving circuit is in the time opening, can continue output high level, so that corresponding backlight 211 is luminous, owing to completing the unlatching of described N road driving circuit 202 in each sweep interval, therefore, in a upper sweep interval, the driving of backlight 211 can not have influence on the driving of backlight 211 in next sweep interval, the luminous of backlight 211 in each sweep interval is independent of each other, thereby can guarantees that the backlight of whole LCD screen evenly lights.
In specific implementation, suppose sweep interval i, sweep interval i+1 be respectively [i (T-1), iT], [iT,
I (T+1)], so, in sweep interval i, the start-up time of described N road driving circuit 202 all can not exceed iT.
Embodiment mono-tool has the following advantages:
Because timesharing gating can drive luminous by described N road driving circuit by the different group backlight of different period gatings within a scan period, therefore N road driving circuit can timesharing drive the corresponding M*N of M group backlight road backlight within a scan period, therefore, need to be for every road situation that is provided with corresponding driving circuit backlight with respect in prior art, the application can greatly reduce the number of driving circuit, thereby can reduce the complicacy of circuit system, and can save the driving cost of system.
Embodiment bis-
The drive system of the backlight of the present embodiment, on the basis of above-described embodiment one, further can also comprise following optional technical scheme.
The peak current value when peak current value that the driving circuit 202Wei Mei road, described every road backlight 211 of the present embodiment provides is greater than non-Time share scanning.
Due within a scan period, the conducting respectively in M sweep interval of each group backlight, if the peak current value while now using non-Time share scanning, the backlight of lighting in unit interval can tail off, therefore in order to improve the brightness of whole LCD screen, described every road driving circuit 202 of the present embodiment rises to the peak current value that every road backlight 211 provides, the peak current value while making it be greater than non-Time share scanning, the scan mode that non-Time share scanning is prior art here.
In a preferred embodiment of the present application, the M of peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is non-Time share scanning doubly, now, the brightness of whole LCD screen when the brightness of whole LCD screen can reach existing non-Time share scanning.
To sum up, the peak current value when peak current value that driving circuit 202Wei Mei road, the present embodiment Zhong Mei road backlight 211 provides is greater than non-Time share scanning, the brightness that can improve whole LCD screen.
Embodiment tri-
The drive system of the backlight of the present embodiment, on the basis of above-described embodiment one, further can also comprise following optional technical scheme.
The described Time share scanning of the present embodiment corresponding scanning of mode backlight frame per second is greater than the corresponding scanning of scanning technique frame per second when overstepping one's bounds.
Due within a scan period, respectively organize backlight respectively conducting in M sweep interval, if now use the corresponding scanning of scanning technique frame per second when overstepping one's bounds, in the unit interval, inswept picturedeep can tail off, and easily causes image flicker; Therefore, therefore in order to improve picture quality, the corresponding scanning of the described Time share scanning of the present embodiment mode backlight frame per second is greater than the corresponding scanning of scanning technique frame per second when overstepping one's bounds.
In a preferred embodiment of the present application, when the described Time share scanning corresponding scanning of mode backlight frame per second is non-Time share scanning, the M of corresponding scanning frame per second doubly, now, inswept picturedeep in unit interval when inswept picturedeep can reach existing non-Time share scanning in the unit interval.
To sum up, the corresponding scanning of the mode backlight of Time share scanning described in the present embodiment frame per second is greater than the corresponding scanning of scanning technique frame per second when overstepping one's bounds, can avoid image flicker, therefore can improve picture quality.
For making those skilled in the art understand better the embodiment of the present application, the application example that provides backlight driver in a kind of liquid crystal indicator at this, this example relates to use No. 3 driving circuits and drives 6 paths of LEDs lamp bars;
With reference to Fig. 3, show the structural representation of the drive system in a kind of LED-backlit of the application source, it specifically can comprise: 6 paths of LEDs lamp bar LED1, LED2, LED3, LED4, LED5, LED6, gating circuit, feedback circuit, DC/DC circuit, select circuit and No. 3 driving circuits, wherein Mei road driving circuit specifically can comprise in PWM(figure, marked PWM1, PWM2, PWM3), field-effect transistor and driving resistance etc.;
Wherein, above-mentioned 6 paths of LEDs lamp bar LED1, LED2, LED3, LED4, LED5, LED6 are divided into 2 groups, with reference to Fig. 4, show the grouping schematic diagram of a kind of LED lamp of the application bar, wherein, LED1, LED3, LED5 are in first screen, and LED2, LED4, LED6 are in second screen;
Described every road driving circuit is connected with described 2 groups of LED lamp bar Zhong mono-tunnels respectively, particularly, PWM1 connects the LED2 in LED1 in the 1st group of LED lamp article and the 2nd group of LED lamp article, PWM2 connects the LED4 in LED3 in the 1st group of LED lamp article and the 2nd group of LED lamp article, and PWM3 connects the LED6 in LED5 in the 1st group of LED lamp article and the 2nd group of LED lamp article;
The anode of described the 1st group of LED lamp article is connected to VLED1 jointly, and the anode of described the 2nd group of LED lamp article is connected to VLED2 jointly;
Described gating circuit is mainly used according to the driving process of 2 groups of LED lamp bars described in Time share scanning mode control backlight, and its function specifically can comprise:
The first, for according to Time share scanning mode backlight, at 2 sweep intervals of a scan period, send the gating signal for certain group LED lamp bar to described on-off circuit respectively;
The second, for according to Time share scanning mode backlight, control output and the start-up time of described No. 3 driving circuits; Here, the output of driving circuit is mainly used in the dutycycle of the pulse signal of controlling the unlatching of LED lamp bar;
Described DC/DC circuit is mainly used in, according to the feedback voltage of feedback circuit output, the driving voltage in above-mentioned LED-backlit source is adjusted to suitable magnitude of voltage;
With reference to Fig. 5, show the control sequential schematic diagram of a kind of Time share scanning of the application, No. 3 driving circuits scan in one that refreshes in LCD screen described in described gating circuit control, and all LED lamp bars are all lighted one time; Wherein, in the zero hour of the sweep interval 1 of a scan period, gating circuit is linked into the output of described DC/DC circuit on VLED1 by described on-off circuit, now, all LED lamp bars (LED1, LED3, LED5) that PWM1, PWM2, PWM3 just can control in first screen are all lighted with certain brightness; In like manner, in the sweep interval 2 of a scan period, gating circuit is linked into the output of DC/DC circuit on VLED2 by described on-off circuit, now, all LED lamp bars (LED2, LED4, LED6) that PWM1, PWM2, PWM3 can control in second screen are all lighted with certain brightness.
It should be noted that, above-mentionedly provide the mode of driving voltage just as example by feedback circuit and DC/DC circuit to backlight, in fact other to provide the mode of driving voltage to backlight be also feasible, for example, can provide driving voltage etc. to backlight by gating circuit, the embodiment of the present application provides the mode of driving voltage not limited concrete to backlight.
The application also provides a kind of driving method embodiment of backlight, and the method embodiment can be within a scan period, and timesharing selects one group of backlight in M group backlight to drive luminous by N road driving circuit;
Wherein, every group of backlight comprises that N road is backlight, and N road in described every group of backlight is backlight to be all connected with described N road driving circuit respectively; Described M is more than or equal to 2 integer.
In a preferred embodiment of the present application, described timesharing selects one group of backlight in described M group backlight to drive luminous step to comprise by described N road driving circuit: by the on-off circuit being connected with described gating circuit and described M group backlight respectively, in the time of one group of backlight of described gating circuit gating, select described group of N backlight and described road, the N road driving circuit in backlight to connect.
Wherein, can be according to Time share scanning mode backlight, generate the gating signal of one group of backlight in described M group backlight, select described group of N backlight and described road, the N road driving circuit in backlight to connect by described on-off circuit according to described gating signal, the detailed process that generates described gating signal can be: according to Time share scanning mode backlight, generate respectively the gating signal of one group of backlight in described M group backlight in the multiple sweep intervals within a scan period; Wherein, the quantity of described sweep interval is identical with the group number of described backlight.
In addition, can be according to Time share scanning mode backlight, control output and the start-up time of described N road driving circuit, corresponding detailed process can be: according to Time share scanning mode backlight, control output and the start-up time of described N road driving circuit, make them in multiple sweep intervals of a scan period, open successively according to the scanning sequency time delay of connected backlight; Wherein, the quantity of described sweep interval is identical with the group number of described backlight.
In another preferred embodiment of the application, peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is greater than non-Time share scanning.Preferably, the M of peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is non-Time share scanning times, now, the brightness of whole LCD screen when the brightness of whole LCD screen can reach existing non-Time share scanning.
In the embodiment of the present application, preferably, the corresponding scanning of described Time share scanning mode backlight frame per second is greater than the corresponding scanning of scanning technique frame per second when overstepping one's bounds.Preferably, corresponding M times of scanning frame per second of scanning technique when the corresponding scanning of described Time share scanning mode backlight frame per second can be overstepping one's bounds, now, inswept picturedeep in unit interval when inswept picturedeep can reach existing non-Time share scanning in the unit interval.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and other difference, between each embodiment identical similar part mutually referring to.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of method.
The drive system of a kind of backlight above the application being provided and method, be described in detail, applied principle and the embodiment of specific case to the application herein and set forth, above explanation is just for helping to understand the application's method and core concept thereof; , for one of ordinary skill in the art, according to the application's thought, all will change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application meanwhile.
Claims (10)
1. a drive system for backlight, is characterized in that, comprising:
M organizes backlight, and wherein, every group of backlight comprises that N road is backlight, and described M is more than or equal to 2 integer;
N road driving circuit, wherein, N road in described every group of backlight is backlight to be all connected with described N road driving circuit respectively;
Gating circuit, is connected with described M group backlight, and within a scan period, timesharing selects one group of backlight in described M group backlight to drive luminous by described N road driving circuit.
2. the system as claimed in claim 1, it is characterized in that, also comprise on-off circuit, described on-off circuit is connected with described gating circuit and described M group backlight respectively, for in the time of one group of backlight of described gating circuit gating, select described group of N backlight and described road, the N road driving circuit in backlight to connect.
3. system as claimed in claim 2, is characterized in that, peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is greater than non-Time share scanning.
4. system as claimed in claim 2 or claim 3, is characterized in that, scanning frame per second when the described Time share scanning corresponding scanning of mode backlight frame per second is greater than non-Time share scanning.
5. system as claimed in claim 3, is characterized in that, the M of peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is non-Time share scanning doubly.
6. system as claimed in claim 4, is characterized in that, when the described Time share scanning corresponding scanning of mode backlight frame per second is non-Time share scanning, the M of corresponding scanning frame per second doubly.
7. a driving method for backlight, is characterized in that, within a scan period, timesharing selects one group of backlight in M group backlight to drive luminous by N road driving circuit;
Wherein, every group of backlight comprises that N road is backlight, and N road in described every group of backlight is backlight to be all connected with described N road driving circuit respectively; Described M is more than or equal to 2 integer.
8. method as claimed in claim 7, it is characterized in that, described timesharing selects one group of backlight in described M group backlight to drive luminous step to comprise by described N road driving circuit: by the on-off circuit being connected with described gating circuit and described M group backlight respectively, in the time of one group of backlight of described gating circuit gating, select described group of N backlight and described road, the N road driving circuit in backlight to connect.
9. method as claimed in claim 8, is characterized in that, peak current value when described driving circuit Wei Mei road, the every road peak current value providing backlight is greater than non-Time share scanning.
10. method as claimed in claim 8, is characterized in that, scanning frame per second when the described Time share scanning corresponding scanning of mode backlight frame per second is greater than non-Time share scanning.
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| CN201410064095.3A CN103839529B (en) | 2014-02-25 | 2014-02-25 | Driving system and method of backlight source |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106384576A (en) * | 2016-08-31 | 2017-02-08 | 武汉华星光电技术有限公司 | Liquid crystal display (LCD) and driving method thereof |
| CN106910476A (en) * | 2017-04-28 | 2017-06-30 | 昆山龙腾光电有限公司 | Backlight drive circuit, driving method, back light system and display device |
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| CN106384576A (en) * | 2016-08-31 | 2017-02-08 | 武汉华星光电技术有限公司 | Liquid crystal display (LCD) and driving method thereof |
| CN106384576B (en) * | 2016-08-31 | 2019-02-26 | 武汉华星光电技术有限公司 | Liquid Crystal Display And Method For Driving |
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| CN106910476A (en) * | 2017-04-28 | 2017-06-30 | 昆山龙腾光电有限公司 | Backlight drive circuit, driving method, back light system and display device |
| CN106910476B (en) * | 2017-04-28 | 2020-01-24 | 昆山龙腾光电股份有限公司 | Backlight driving circuit, driving method, backlight system and display device |
| CN107945748A (en) * | 2017-12-12 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of backlight drive device, method, backlight module and display device |
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| CN109243385A (en) * | 2018-11-12 | 2019-01-18 | 惠科股份有限公司 | Backlight adjusting circuit and display device |
| US11450285B2 (en) | 2018-11-12 | 2022-09-20 | HKC Corporation Limited | Backlight adjustment circuit, backlight module and display device |
| CN109192151A (en) * | 2018-11-29 | 2019-01-11 | 厦门天马微电子有限公司 | Display module and display device |
| CN109493811A (en) * | 2018-12-25 | 2019-03-19 | 厦门天马微电子有限公司 | A kind of display device and its driving method |
| CN110706658A (en) * | 2019-09-29 | 2020-01-17 | 苏州佳世达电通有限公司 | Backlight scanning type display method and backlight scanning type display system |
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