CN102915710B - Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit - Google Patents
Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit Download PDFInfo
- Publication number
- CN102915710B CN102915710B CN201210445734.1A CN201210445734A CN102915710B CN 102915710 B CN102915710 B CN 102915710B CN 201210445734 A CN201210445734 A CN 201210445734A CN 102915710 B CN102915710 B CN 102915710B
- Authority
- CN
- China
- Prior art keywords
- sampling rate
- briliancy
- liquid crystal
- data mapping
- crystal panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a sequential control circuit for reducing flickering of a liquid crystal panel. The sequential control circuit comprises a sensing unit and a data mapping unit, wherein the sensing unit is used for sensing a picture rate corresponding to an input signal; when the picture rate corresponding to the input signal is switched into a second picture rate from a first picture rate, the data mapping unit obtains a second brightness corresponding to the second picture rate and approximate to a first brightness corresponding to the first picture rate according to a dithering method and an information mapping table; and after the data mapping unit obtains the second brightness, the liquid crystal panel displays a picture according to the second brightness and the second picture rate.
Description
Technical field
The invention relates to a kind of sequential control circuit, espespecially a kind of basis trembles color method and data mapping table in order to reduce the sequential control circuit of liquid crystal panel flash.
Background technology
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram for a pixel 100 in liquid crystal panel is described, with Fig. 2 be for illustrate when sampling rate (frame rate) in 60Hz and 40Hz handoff procedure, the schematic diagram of the difference of the actual briliancy of different pictures speed.As shown in Figure 1, pixel 100 comprises switch 102, storage capacitors CS and liquid crystal capacitance CLC, and its breaker in middle 102 is coupled to a data line DL, scan line SL, storage capacitors CS and liquid crystal capacitance CLC; Storage capacitors CS is coupled to a common electrode wire, switch 102 and liquid crystal capacitance CLC; Liquid crystal capacitance CLC is coupled to switch 102 and storage capacitors CS, and in order to receive a common voltage VCOM, the charging voltage V wherein during CS capacitor charging can be determined by formula (1):
(1)
Shown in (1), I is for charging current and T are the duration of charging.
In addition, liquid crystal panel under high resolving power, when sampling rate is 60Hz, charging voltage V during CS capacitor charging
60can be determined by formula (2):
(2)
Wherein T
60be the duration of charging of CS electric capacity when sampling rate is 60Hz.
When sampling rate is 40Hz, charging voltage V during CS capacitor charging
40can be determined by formula (3):
(3)
Wherein T
40be the duration of charging of CS electric capacity when sampling rate is 40Hz.
Seamless switching display frame renewal rate (Seamless Display Refresh Rate Switching is opened at liquid crystal panel, SDRRS) after function, if when sampling rate switches to 40Hz by 60Hz, due to the difference (T of CS capacitor charging time
60<T
40), to such an extent as to the charging voltage difference (V of CS electric capacity
60< V
40), cause the problem occurring because of the difference (as shown in Figure 2) of actual briliancy during liquid crystal panel display frame glimmering.
Summary of the invention
One embodiment of the invention provide a kind of sequential control circuit in order to reduce liquid crystal panel flash.This sequential control circuit comprises a detecting unit and a data mapping unit.This detecting unit is the sampling rate (frame rate) corresponding to an input signal in order to detecting; When the sampling rate corresponding to this input signal switches to second sampling rate from one first sampling rate, this data mapping unit trembles color method (Dithering) and data reflection (data mapping) table according to one, obtain and to should the first briliancy of the first sampling rate close to should the second briliancy of the second sampling rate; Wherein after this data mapping unit obtains this second briliancy, this liquid crystal panel, according to this second briliancy and this second sampling rate, shows a picture.
Another embodiment of the present invention provides a kind of method in order to reduce liquid crystal panel flash, and wherein this liquid crystal panel comprises a sequential control circuit, and this sequential control circuit comprises a detecting unit and a data mapping unit.The method comprises the sampling rate that the detecting of this detecting unit corresponds to an input signal; When the sampling rate corresponding to this input signal switches to second sampling rate from one first sampling rate, this data mapping unit trembles color method (Dithering) and a data mapping table according to one, obtain and to should the first briliancy of the first sampling rate close to should the second briliancy of the second sampling rate; After this data mapping unit obtains this second briliancy, this liquid crystal panel, according to this second briliancy and this second sampling rate, shows a picture.
The invention provides a kind of sequential control circuit in order to reduce liquid crystal panel flash and the method in order to reduce liquid crystal panel flash.This sequential control circuit and the method are the sampling rates utilizing a detecting unit detecting to correspond to an input signal.Then when the sampling rate corresponding to this input signal switches to second sampling rate from one first sampling rate, one data mapping unit can tremble color method and a data mapping table according to one, obtain and to should the first briliancy of the first sampling rate close to should the second briliancy of the second sampling rate.Because to should the second sampling rate the second briliancy and to should the first briliancy of the first sampling rate close, so a liquid crystal panel can according to this second briliancy and this second sampling rate, show a picture, effectively to reduce the problem that glimmering appears in this liquid crystal panel.
Accompanying drawing explanation
Fig. 1 is the schematic diagram for pixel in liquid crystal panel is described.
Fig. 2 is for illustrating when sampling rate is in 60Hz and 40Hz handoff procedure, the schematic diagram of the difference of the actual briliancy of different pictures speed.
Fig. 3 is for one embodiment of the invention illustrate a kind of schematic diagram of the sequential control circuit in order to reduce liquid crystal panel flash.
Fig. 4 is the schematic diagram of the data mapping table for prior art.
Fig. 5 is the schematic diagram for data mapping table of the present invention is described.
Fig. 6 is for another embodiment of the present invention illustrates a kind of process flow diagram of the method in order to reduce liquid crystal panel flash.
[primary clustering symbol description]
100 pixels
102 switches
300 sequential control circuits
302 detecting units
304 data mapping unit
306 data mapping tables
308 liquid crystal panels
CS storage capacitors
CLC liquid crystal capacitance
DL data line
IS input signal
SL sweep trace
VCOM common voltage
Y60 first briliancy
Y40 second briliancy
600-606 step.
Embodiment
Please refer to Fig. 3, Fig. 3 is for one embodiment of the invention illustrate a kind of schematic diagram of the sequential control circuit 300 in order to reduce liquid crystal panel flash.Sequential control circuit 300 comprises detecting unit 302 and a data mapping unit 304.Detecting unit 302 is the sampling rates (frame rate) corresponding to an input signal IS in order to detecting, such as 60Hz or 40Hz.If when the sampling rate corresponding to input signal IS switches to one second sampling rate (such as 40Hz) from one first sampling rate (such as 60Hz), data mapping unit 304 can according to one spatially or temporally tremble color method (Dithering) and a data mapping (data mapping) table 306, obtain the second briliancy of correspondence second sampling rate close with the first briliancy of corresponding first sampling rate, wherein data mapping table 306 relates to the mapping relations between the first briliancy of a liquid crystal panel 308 and the second briliancy.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the schematic diagram of the data mapping table for prior art, and Fig. 5 is the schematic diagram for data mapping table 306 of the present invention is described.In the diagram, the first briliancy Y60 of corresponding first sampling rate and the second briliancy Y40 of corresponding second sampling rate has 64 grey exponent numbers; In Figure 5, first briliancy Y60 of corresponding first sampling rate has 64 grey exponent numbers (Fig. 5 only shows the GTG 30 of the first briliancy Y60 of corresponding first sampling rate, GTG 31 and GTG 32) and the second briliancy Y40 of corresponding second sampling rate has 512 grey exponent numbers (Fig. 5 only shows GTG 240 to the GTG 256 of the second briliancy Y40 of corresponding second sampling rate), so in data mapping table 306, the grey exponent number that the second briliancy Y40 has is 2 of the grey exponent number that the first briliancy Y60 has
3doubly.Also 8 GTGs are divided into again between every two GTGs by the second briliancy Y40 in Fig. 4, to produce the second briliancy Y40 in Fig. 5.Second briliancy Y40 of such as, GTG 30 in Fig. 4 is the second briliancy Y40 corresponding to GTG 240 in Fig. 5; Second briliancy Y40 of the GTG 31 in Fig. 4 is the second briliancy Y40 corresponding to GTG 248 in Fig. 5.Therefore, 8 GTGs are divided between two GTGs (GTG 30 GTG 31) of the second briliancy Y40 in Fig. 4.But it is 2 of the grey exponent number that the first briliancy Y60 has that the present invention is not limited to the grey exponent number that the second briliancy Y40 has
3doubly.That is second the grey exponent number that has of briliancy Y40 be 2 of the grey exponent number that the first briliancy Y60 has
ndoubly, wherein N is a pre-determined bit number.
When the sampling rate corresponding to input signal IS switches to the second sampling rate (such as 40Hz) from the first sampling rate (such as 60Hz), if data mapping unit 304 is data mapping tables of the first briliancy (such as the first briliancy 59.35nits of corresponding GTG 30) according to corresponding first sampling rate and Fig. 4, obtain second briliancy (the second briliancy 55.69nits of corresponding GTG 30) of corresponding second sampling rate, then in the prior art, liquid crystal panel 308 can have scintillation to occur because the first briliancy (59.35nits) is different with the second briliancy (55.69nits).
But when the sampling rate corresponding to input signal IS switches to the second sampling rate (such as 40Hz) from the first sampling rate (such as 60Hz), the data mapping unit 304 of sequential control circuit 300 is data mapping tables 306 of the first briliancy (such as the first briliancy 59.35nits of corresponding GTG 30) according to corresponding first sampling rate and Fig. 5, finds second briliancy (the second briliancy 59.51nits of corresponding GTG 247) of correspondence second sampling rate close with first briliancy (59.35nits) of corresponding first sampling rate.Then, data mapping unit 304 recycling is trembled color method (Dithering) and is made liquid crystal panel 308 produce second briliancy (the second briliancy 59.51nits of corresponding GTG 247) of corresponding second sampling rate.Therefore, in the present invention, when the sampling rate corresponding to input signal IS switches to the second sampling rate (such as 40Hz) from the first sampling rate (such as 60Hz), liquid crystal panel 308 can according to the second briliancy and the second sampling rate, display frame, and scintillation generation is not had because the first briliancy (59.35nits) is close with the second briliancy (59.51nits).In addition, when the sampling rate corresponding to input signal IS switches to the first sampling rate (such as 60Hz) from the second sampling rate (such as 40Hz), data mapping unit 304 also can make liquid crystal panel 308 not have scintillation generation according to aforesaid operations principle, does not repeat them here.
Please refer to Fig. 3, Fig. 5 and Fig. 6, Fig. 6 is for another embodiment of the present invention illustrates a kind of process flow diagram of the method in order to reduce liquid crystal panel flash.The method of Fig. 6 utilizes the sequential control circuit 300 of Fig. 3 to illustrate, detailed step is as follows:
Step 600: start;
Step 602: detecting unit 302 detects the sampling rate corresponding to an input signal IS;
Step 604: when the sampling rate corresponding to input signal IS switches to second sampling rate from one first sampling rate, data mapping unit 304, according to trembling color method and data mapping table 306, obtains the second briliancy of correspondence second sampling rate close with the first briliancy of corresponding first sampling rate;
Step 606: after data mapping unit 306 obtains this second briliancy, liquid crystal panel 308, according to the second briliancy and the second sampling rate, shows a picture; Rebound step 604.
In step 602, as shown in Figure 3, detecting unit 302 is the sampling rates corresponding to input signal IS in order to detecting, such as 60Hz or 40Hz.In step 604, if when the sampling rate corresponding to input signal IS switches to the second sampling rate (such as 40Hz) from the first sampling rate (such as 60Hz), data mapping unit 304 is data mapping tables 306 of the first briliancy (such as the first briliancy 59.35nits of corresponding GTG 30) according to corresponding first sampling rate and the 5th figure, finds second briliancy (the second briliancy 59.51nits of corresponding GTG 247) of correspondence second sampling rate close with first briliancy (59.35nits) of corresponding first sampling rate.Then, data mapping unit 304 recycling trembles color method (Dithering) makes liquid crystal panel 308 produce second briliancy (the second briliancy 59.51nits of corresponding GTG 247) of corresponding second sampling rate, wherein data mapping table 306 relates to the mapping relations between the first briliancy and the second briliancy, and as shown in Figure 5, the second briliancy Y40 that the first briliancy Y60 of corresponding first sampling rate has 64 grey exponent numbers and corresponding second sampling rate has 512 grey exponent numbers.That is in data mapping table 306, the grey exponent number that the second briliancy Y40 has is 2 of the grey exponent number that the first briliancy Y60 has
3doubly.In step 606, when the sampling rate corresponding to input signal IS switches to the second sampling rate (such as 40Hz) from the first sampling rate (such as 60Hz), liquid crystal panel 308 can according to the second briliancy and the second sampling rate, display frame, and scintillation generation is not had because the first briliancy (59.35nits) is close with the second briliancy (59.51nits).In addition, when the sampling rate corresponding to input signal IS switches to the first sampling rate (such as 60Hz) from the second sampling rate (such as 40Hz), data mapping unit 304 also can make liquid crystal panel 308 not have scintillation generation according to aforesaid operations principle, does not repeat them here.
In sum, the sequential control circuit in order to reduce liquid crystal panel flash provided by the present invention and the method in order to reduce liquid crystal panel flash utilize detecting unit to detect the sampling rate corresponding to an input signal.Then when the sampling rate corresponding to input signal switches to the second sampling rate from the first sampling rate, data mapping unit according to trembling color method and data mapping table, can obtain the second briliancy of correspondence second sampling rate close with the first briliancy of corresponding first sampling rate.Because the first briliancy of the second briliancy of corresponding second sampling rate and corresponding first sampling rate is close, so liquid crystal panel according to the second briliancy and the second sampling rate, can show a picture, effectively to reduce the problem that glimmering appears in liquid crystal panel.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. in order to reduce a method for liquid crystal panel flash, this liquid crystal panel comprises a sequential control circuit, and this sequential control circuit comprises a detecting unit and a data mapping unit, and it is characterized in that, the method comprises:
The detecting of this detecting unit corresponds to the sampling rate (frame rate) of an input signal;
When the sampling rate corresponding to this input signal switches to second sampling rate from one first sampling rate, this data mapping unit trembles color method (Dithering) and data reflection (data mapping) table according to one, obtain and to should the first briliancy of the first sampling rate close to should the second briliancy of the second sampling rate; And
After this data mapping unit obtains this second briliancy, this liquid crystal panel, according to this second briliancy and this second sampling rate, shows a picture;
Wherein this data mapping table relates to the mapping relations between this first briliancy and this second briliancy;
Wherein this first briliancy has one first grey exponent number and has one second grey exponent number with this second briliancy, and this second grey exponent number is 2 of this first grey exponent number
ntimes, and N is a pre-determined bit number;
Wherein this first sampling rate is for 60Hz and this second sampling rate are 40Hz.
2. in order to reduce a sequential control circuit for liquid crystal panel flash, it is characterized in that, comprise:
One detecting unit, corresponds to the sampling rate of an input signal in order to detecting; And
One data mapping unit, when the sampling rate corresponding to this input signal switches to second sampling rate from one first sampling rate, this data mapping unit trembles color method and a data mapping table according to one, obtain and to should the first briliancy of the first sampling rate close to should the second briliancy of the second sampling rate;
Wherein after this data mapping unit obtains this second briliancy, this liquid crystal panel, according to this second briliancy and this second sampling rate, shows a picture;
Wherein this data mapping table relates to the mapping relations between this first briliancy and this second briliancy;
Wherein this first briliancy has one first grey exponent number and has one second grey exponent number with this second briliancy, and this second grey exponent number is 2 of this first grey exponent number
ntimes, and N is a pre-determined bit number;
Wherein this first sampling rate is for 60Hz and this second sampling rate are 40Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445734.1A CN102915710B (en) | 2012-11-09 | 2012-11-09 | Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210445734.1A CN102915710B (en) | 2012-11-09 | 2012-11-09 | Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102915710A CN102915710A (en) | 2013-02-06 |
| CN102915710B true CN102915710B (en) | 2015-02-04 |
Family
ID=47614051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210445734.1A Expired - Fee Related CN102915710B (en) | 2012-11-09 | 2012-11-09 | Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102915710B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107784981B (en) * | 2016-08-24 | 2020-08-04 | 联发科技股份有限公司 | Device applied to display and related image display method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5311794A (en) * | 1993-01-11 | 1994-07-14 | Canon Kabushiki Kaisha | Display line dispatcher apparatus |
| JP2002196729A (en) * | 2000-12-27 | 2002-07-12 | Matsushita Electric Ind Co Ltd | Matrix type display device and adjusting method therefor |
| CN1941062A (en) * | 2005-09-29 | 2007-04-04 | 三星电子株式会社 | Liquid crystal display having improved image quality |
| CN101533611A (en) * | 2008-03-10 | 2009-09-16 | 奇美电子股份有限公司 | Liquid crystal display panel, liquid crystal display device and control method thereof |
| CN101604514A (en) * | 2009-07-22 | 2009-12-16 | 福建华映显示科技有限公司 | Liquid Crystal Display And Method For Driving |
| CN102122498A (en) * | 2011-04-23 | 2011-07-13 | 福建华映显示科技有限公司 | Liquid crystal display device and driving method thereof |
-
2012
- 2012-11-09 CN CN201210445734.1A patent/CN102915710B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5311794A (en) * | 1993-01-11 | 1994-07-14 | Canon Kabushiki Kaisha | Display line dispatcher apparatus |
| JP2002196729A (en) * | 2000-12-27 | 2002-07-12 | Matsushita Electric Ind Co Ltd | Matrix type display device and adjusting method therefor |
| CN1941062A (en) * | 2005-09-29 | 2007-04-04 | 三星电子株式会社 | Liquid crystal display having improved image quality |
| CN101533611A (en) * | 2008-03-10 | 2009-09-16 | 奇美电子股份有限公司 | Liquid crystal display panel, liquid crystal display device and control method thereof |
| CN101604514A (en) * | 2009-07-22 | 2009-12-16 | 福建华映显示科技有限公司 | Liquid Crystal Display And Method For Driving |
| CN102122498A (en) * | 2011-04-23 | 2011-07-13 | 福建华映显示科技有限公司 | Liquid crystal display device and driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102915710A (en) | 2013-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9058072B2 (en) | Touch sensing apparatus and driving method thereof | |
| US9224344B2 (en) | Electrophoretic display with a compensation circuit for reducing a luminance difference and method thereof | |
| US10222885B2 (en) | Display device with integrated touch screen and driving method thereof | |
| US10429993B2 (en) | Touch display driving integrated circuit and operation method thereof | |
| CN105654890B (en) | Display device and driving method thereof | |
| CN203895097U (en) | Circuit capable of eliminating shutdown ghost shadows and display device | |
| US9910333B2 (en) | Display device | |
| CN104182108B (en) | Array base palte, touch control display apparatus and driving method | |
| CN102385205B (en) | Pixel structure | |
| CN103310748A (en) | Display device, display method, and electronic device | |
| CN104793816A (en) | Touch detection device, display device with touch detection function, and electronic apparatus | |
| CN106952628A (en) | Ghost eliminating circuit and display device | |
| CN102200857A (en) | Touch signal scanning frequency determining method of touch panel | |
| CN105118465A (en) | GOA circuit and driving method thereof, and liquid crystal displayer | |
| CN103176655B (en) | A kind of driving method of touch display and device | |
| CN110955352B (en) | Touch panel display and control method thereof | |
| JP2013168097A (en) | Display apparatus and display method | |
| CN101859039A (en) | Touch detection method and flat panel display with embedded type touch panel | |
| CN110047448B (en) | Touch panel control device, touch panel control method, and input display device | |
| CN104240671A (en) | Pixel circuit, control method thereof and display device with pixel circuit | |
| CN102201213A (en) | Liquid crystal display device without upper plate electrode and driving method thereof | |
| CN112382246B (en) | Driving method, time sequence controller and liquid crystal display | |
| CN107885368B (en) | Touch display device and electronic apparatus | |
| CN102915710B (en) | Sequential control circuit for reducing flickering of liquid crystal panel and relevant method of sequential control circuit | |
| CN101206844A (en) | Dynamic switch drive mode lcd device and method for reducing power consumption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20191109 |