CN102385830A - Buffering device and display system - Google Patents
Buffering device and display system Download PDFInfo
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- CN102385830A CN102385830A CN2010102716291A CN201010271629A CN102385830A CN 102385830 A CN102385830 A CN 102385830A CN 2010102716291 A CN2010102716291 A CN 2010102716291A CN 201010271629 A CN201010271629 A CN 201010271629A CN 102385830 A CN102385830 A CN 102385830A
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Abstract
Provided are a buffering device and a display system. The buffering device is used for generating an output signal and comprises an up-pulling module and a down-pulling module. The up-pulling module provides the output signal with a rising edge, and the down-pulling module provides the output signal with a descending edge. The descending edge is provided with a plurality of descending parts. The slope of a first descending part of the plurality of descending parts is different from that of a second descending part of the plurality of descending parts.
Description
Technical field
The present invention relates to a kind of snubber assembly, particularly a kind of snubber assembly that produces the output signal, wherein this output signal has at least two descending slopes.
Background technology
Figure 1A is the synoptic diagram of display system.As shown in the figure, display system 100 has gate drivers 110.Gate drivers 110 offers pixel cell P through gate line 131 with grid impulse GP
121～P
12nWhen the panel size of display system became big, the length of gate line 131 also can be and then elongated, thereby increase the equiva lent impedance of gate line 131.
When gate drivers 110 passes through gate line 131, grid impulse GP is offered pixel cell P
121～P
12nThe time, near the pixel cell of gate drivers 110 (like P
121And P
122) the signal of pixel electrode (pixel electrode) will be different from pixel cell away from gate drivers 110 (like P
12n) the signal of pixel electrode (pixel electrode).
Figure 1B is the relation between grid impulse GP and the pixel electrode signal.Symbol PE
NearRepresentative is near the signal of the pixel electrode of the pixel cell of gate drivers 110.Symbol PE
FarRepresentative is away from the signal of the pixel electrode of the pixel cell of gate drivers 110.As shown in the figure, because the influence of the equiva lent impedance of gate line 131, will make pixel electrode signal PE
NearHas voltage difference delta V
1, pixel electrode signal PE
FarHas voltage difference delta V
2Because voltage difference delta V
1With Δ V
2And unequal, so can't be simultaneously to voltage difference delta V
1With Δ V
2Compensate.
Summary of the invention
The present invention provides a kind of snubber assembly, in order to producing an output signal, and comprises on one drawing-die piece and drawing-die piece once.Last drawing-die piece makes the output signal have a rising edge edge.Drop-down module makes the output signal have a decline edge.Trailing edge is along having a plurality of sloping portions.The slope of one first sloping portion in these sloping portions is different from the slope of one second sloping portion in these sloping portions.
The present invention also provides a kind of display system, comprises a gate drivers, one source pole driver and a plurality of pixel cell.Gate drivers produces a plurality of sweep signals, and comprises a shift LD device, a level shifting apparatus and a snubber assembly.Shift LD device produces a plurality of shift signals.Level shifting apparatus changes the level of shift signal, and produces a plurality of switching signals.Snubber assembly increases the driving force of switching signal, and produces a plurality of output signals.The output signal is as sweep signal.Snubber assembly comprises on one drawing-die piece and drawing-die piece once.Last drawing-die piece makes one first output signal of output signal have a rising edge edge.Drop-down module makes the first output signal have a decline edge.Trailing edge is along having a plurality of sloping portions.The slope of first sloping portion of 1 in the sloping portion is different from the slope of second sloping portion of 1 in the sloping portion.Source electrode driver provides a plurality of data-signals.Pixel cell receives data-signal, and according to data-signal, presents corresponding picture according to sweep signal.
For letting the feature and advantage of the present invention can be more obviously understandable, the hereinafter spy enumerates preferred embodiment, and conjunction with figs., elaborates as follows:
Description of drawings
Figure 1A is the synoptic diagram of display system.
Figure 1B is the relation between grid impulse GP and the pixel electrode signal.
Fig. 2 is the synoptic diagram of display system of the present invention.
Fig. 3 is that one of gate drivers of the present invention maybe embodiment.
Fig. 4 A is that one of snubber assembly of the present invention maybe embodiment.
Fig. 4 B is output signal S of the present invention
OUTSynoptic diagram.
Fig. 4 C is another possibility embodiment of output signal of the present invention.
[main element symbol description]
100,200: display system; 110,210: gate drivers;
131: gate line; 230: source electrode driver;
310: shift LD device; 330: level shifting apparatus;
350: snubber assembly; 410: go up the drawing-die piece;
430: drop-down module; 421: the rising edge edge;
422,423,441～443c: sloping portion;
P
121～P
12n, P
11～P
Mn: pixel cell;
SW1～SW3: switch element.
Embodiment
Fig. 2 is the synoptic diagram of display system of the present invention.The present invention is the kind of limit display system 200 not.Display system 200 can be PDA(Personal Digital Assistant), mobile phone (cellular phone), digital camera, TV, GPS (GPS), automobile-used display, aviation with display, digital frame (digital photo frame), mobile computer or desktop PC.In the present embodiment, display system 200 comprises, gate drivers (gate driver) 210, source electrode driver (source driver) 230 and pixel cell P
11～P
Mn
Fig. 3 is that one of gate drivers of the present invention maybe embodiment.As shown in the figure, gate drivers 210 comprises, shift LD device (shift register) 310, level shifting apparatus (level shifter) 330 and snubber assembly (buffer) 350.
Because shift LD device 310 produces shift signal S
SR1～S
SRnMode, and level shifting apparatus 330 produces switching signal S
LS1～S
LSnMode be this area personage and know very well, so repeat no more.
In addition, in the present embodiment, the output signal S that snubber assembly 350 is produced
OUT1～S
OUTn, can be used as the sweep signal S1～Sn among Fig. 2.Because output signal S
OUT1～S
OUTnTrailing edge along all having at least two different descending slopes, so as if exporting signal S
OUT1～S
OUTnAs sweep signal S1～Sn, then can make the signal of pixel electrode of pixel cell of the approximate far-end (away from gate drivers) of signal of pixel electrode of the pixel cell of near-end (near gate drivers), and then logical (feed-through) phenomenon of avoiding bursting.
Fig. 4 A is that one of snubber assembly of the present invention maybe embodiment.Generally speaking, in order to produce output signal S
OUT1～S
OUTn, snubber assembly 350 has many identical buffer circuits, and each buffer circuit produces a corresponding output signal.Be convenient explanation, Fig. 4 A only shows single buffer circuit, the output signal S that it produced
OUTCan be output signal S
OUT1～S
OUTnAny one.
Shown in Fig. 4 A, snubber assembly 350 comprises drawing-die piece 410 and drop-down module 430.Last drawing-die piece 410 makes output signal S
OUTHas a rising edge edge.Drop-down module 430 makes output signal S
OUTHas a decline edge.In the present embodiment, output signal S
OUTTrailing edge along having a plurality of sloping portions.The slope of one first sloping portion in these sloping portions is different from the slope of one second sloping portion in these parts.
In other words, output signal S
OUTTrailing edge along having two different slopes.In another possibility embodiment, output signal S
OUTTrailing edge along can having the Different Slope more than three.In this example, the two in this three slope maybe be identical, but be different from another.
Fig. 4 B is output signal S
OUTSynoptic diagram.As shown in the figure, in period P
1, last drawing-die piece 410 will be exported signal S
OUTLevel be pulled to VH by VL.Therefore, output signal S
OUTHas a rising edge along 421.In period P
2, drop-down module 430 will be exported signal S earlier
OUTLevel be pulled down to VY by VH, then in period P
3, will export signal S again
OUTLevel be pulled down to VL by VY.Therefore, output signal S
OUTTrailing edge along having sloping portion 422 and 423, wherein the slope of sloping portion 422 is different from the slope of sloping portion 423.
Fig. 4 C is another possibility embodiment of output signal of the present invention.In the present embodiment, output signal S
OUTTrailing edge along having three sloping portions 441～443.Sloping portion 441～443 has slope S lope1～Slope3 respectively.In Fig. 4 C, slope S lope1～Slope3 is all inequality, but is not in order to restriction the present invention.In other embodiments, output signal S
OUTThe first and the 3rd sloping portion on trailing edge edge have identical slope, but the slope of the 3rd sloping portion is different from the slope of second sloping portion.
Please refer to Fig. 4 A, in the present embodiment, last drawing-die piece 410 comprises switch element SW1.Switch element SW1 is coupled to operating voltage V
DDAnd between the output node ND.The signal of output node ND is output signal S
OUTIn period P
1, switch element SW1 conducting, switch element SW2 conducting is in order to operating voltage V
DDBe sent to node ND, therefore, can make output signal S
OUTHas a rising edge along (shown in Fig. 4 B421).
Drop-down module 430 comprises switch element SW2 and SW3.Switch element SW2 is coupled between node ND and the operating voltage VL1.In period P
2, switch element SW2 conducting, not conducting of switch element SW1 is in order to be sent to node ND with operating voltage VL1.In the present embodiment, operating voltage VL1 is less than operating voltage V
DD
Switch element SW3 is coupled between node ND and the operating voltage VL2.In period P
3, switch element SW3 conducting is in order to be sent to node ND with operating voltage VL2.The present invention is the relation between restriction operation voltage VL1 and the VL2 not.
In a possibility embodiment, operating voltage VL1 is less than operating voltage V
DD, and greater than operating voltage VL2.In last example, in switch element SW2 and not conducting simultaneously of SW3.That is to say, in period P
3, not conducting of switch element SW2.
In another possibility embodiment, operating voltage VL1 equals operating voltage VL2, and less than operating voltage V
DDIn this example, in period P
2, switch element SW2 is switched on, and not conducting of switch element SW3.In period P
3, switch element SW2 and SW3 all are switched on.
The present invention is the constituted mode of limit switch cell S W1～SW3 not.In a possibility embodiment, switch element SW1 is made up of at least one P transistor npn npn, and switch SW 2 and SW3 constitute by at least one N transistor npn npn.In another possibility embodiment, switch element SW1 can be made up of at least one N transistor npn npn, and switch SW 2 and SW3 are made up of at least one P transistor npn npn.
In addition, in a possibility embodiment, operating voltage VL2 is in the gate drivers 210, minimum operating voltage.For example, please refer to Fig. 3, shift LD device 310 is according to operating voltage V
CCAnd V
SS, carry out shift motion to opening beginning signal CLK.In a possibility embodiment, operating voltage V
CCLess than operating voltage V
DD, and operating voltage V
SSGreater than operating voltage V
EEIn addition, level shifting apparatus 330 is according to operating voltage V
DDWith V
EE, to shift signal S
SR1～S
SRnCarry out the level conversion action.In the present embodiment, operating voltage V
EEEqual operating voltage VL2.
Because the output signal S that snubber assembly 350 is produced
OUTHave at least two different descending slopes, so when snubber assembly 350 is applied among the gate drivers of display system, then can improve the stray capacitance (Cgd in the pixel cell; Show) the routed influence of leading to effect that causes.Therefore, when the panel size of display system became big, the pixel electrode signal of the pixel cell at gate line two ends was close to and equates.
Though the present invention with preferred embodiment openly as above; Right its is not in order to limit the present invention; Those skilled in the art are not breaking away from the spirit and scope of the present invention, and when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the appended claims person of defining.
Claims (20)
1. a snubber assembly produces an output signal, comprising:
Drawing-die piece on one makes this output signal have a rising edge edge; And
Once the drawing-die piece makes this output signal have a decline edge, and this trailing edge is along having a plurality of sloping portions, and the slope of one first sloping portion in these sloping portions is different from the slope of one second sloping portion in these sloping portions.
2. snubber assembly as claimed in claim 1, wherein the slope of one the 3rd sloping portion in these sloping portions is different from the slope of this second sloping portion, and this second sloping portion is between this first and the 3rd sloping portion.
3. snubber assembly as claimed in claim 1, wherein should go up the drawing-die piece and comprise:
One first switch element is coupled between one first operating voltage and the output node, and the signal of this output node is this output signal; Between a first phase; This first switch element conducting in order to this first operating voltage is sent to this node, makes this output signal have this rising edge edge.
4. snubber assembly as claimed in claim 3, wherein this drop-down module comprises:
One second switch unit is coupled between this node and one second operating voltage, and in a second phase, this second switch cell conduction is in order to be sent to this node with this second operating voltage; And
One the 3rd switch element is coupled between this node and one the 3rd operating voltage, and between a third phase, the 3rd switch element conducting is in order to be sent to this node with the 3rd operating voltage.
5. snubber assembly as claimed in claim 4, wherein this second operating voltage is less than this first operating voltage, and greater than the 3rd operating voltage.
6. snubber assembly as claimed in claim 5, wherein between this third phase, this second switch not conducting of unit.
7. snubber assembly as claimed in claim 4, wherein this second operating voltage equals the 3rd operating voltage, and less than this first operating voltage.
8. snubber assembly as claimed in claim 7, wherein between this third phase, this second switch cell conduction.
9. snubber assembly as claimed in claim 4, wherein this first switch element is made up of at least one P transistor npn npn, and this second and third switch constitutes by at least one N transistor npn npn.
10. display system comprises:
One gate drivers produces a plurality of sweep signals, and comprises:
One shift LD device produces a plurality of shift signals;
One level shifting apparatus changes the level of these shift signals, and produces a plurality of switching signals; And
One snubber assembly increases the driving force of these switching signals, and produces a plurality of output signals, and these output signals are as these sweep signals, and this snubber assembly comprises:
Drawing-die piece on one makes one first output signal of these output signals have a rising edge edge; And
Once the drawing-die piece makes this first output signal have a decline edge, and this trailing edge is along having a plurality of sloping portions, and the slope of one first sloping portion in these sloping portions is different from the slope of one second sloping portion in these sloping portions;
The one source pole driver provides a plurality of data-signals; And
A plurality of pixel cells according to these sweep signals, receive these data-signals, and according to these data-signals, present corresponding picture.
11. display system as claimed in claim 10, wherein the slope of one the 3rd sloping portion in these sloping portions is different from the slope of this second sloping portion, and this second sloping portion is between this first and the 3rd sloping portion.
12. display system as claimed in claim 10 wherein should go up the drawing-die piece and comprise:
One first switch element is coupled between one first operating voltage and the output node, and the signal of this output node is this output signal; Between a first phase; This first switch element conducting in order to this first operating voltage is sent to this node, makes this output signal have this rising edge edge.
13. display system as claimed in claim 12, wherein this drop-down module comprises:
One second switch unit is coupled between this node and one second operating voltage, and in a second phase, this second switch cell conduction is in order to be sent to this node with this second operating voltage; And
One the 3rd switch element is coupled between this node and one the 3rd operating voltage, and between a third phase, the 3rd switch element conducting is in order to be sent to this node with the 3rd operating voltage.
14. display system as claimed in claim 13, wherein this second operating voltage is less than this first operating voltage, and greater than the 3rd operating voltage.
15. display system as claimed in claim 14, wherein between this third phase, this second switch not conducting of unit.
16. display system as claimed in claim 14, wherein this second operating voltage equals the 3rd operating voltage, and less than this first operating voltage.
17. display system as claimed in claim 16, wherein between this third phase, this second switch cell conduction.
18. display system as claimed in claim 14, wherein this first switch element is made up of at least one P transistor npn npn, and this second and third switch constitutes by at least one N transistor npn npn.
19. display system as claimed in claim 13, wherein this level shifting apparatus carries out the level conversion action according to this first and the 3rd operating voltage.
20. display system as claimed in claim 19; Wherein this shift LD device is according to one the 4th operating voltage and one the 5th operating voltage; Carry out shift motion, the 4th operating voltage is less than this first operating voltage, and the 5th operating voltage is greater than the 3rd operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102716291A CN102385830A (en) | 2010-09-03 | 2010-09-03 | Buffering device and display system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102716291A CN102385830A (en) | 2010-09-03 | 2010-09-03 | Buffering device and display system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102385830A true CN102385830A (en) | 2012-03-21 |
Family
ID=45825210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102716291A Pending CN102385830A (en) | 2010-09-03 | 2010-09-03 | Buffering device and display system |
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|---|---|---|---|---|
| CN1645465A (en) * | 2005-01-31 | 2005-07-27 | 广辉电子股份有限公司 | Grid driving method and circuit of liquid crystal displaying device |
| US20060055687A1 (en) * | 2004-09-15 | 2006-03-16 | Industrial Technology Research Institute | Brightness control circuits |
| US20070216563A1 (en) * | 2006-01-02 | 2007-09-20 | Wu Zhong Y | Bit-adjacency capacitor-switched DAC, method, driver and display device |
| US20080225035A1 (en) * | 2007-03-15 | 2008-09-18 | Au Optronics Corp. | Liquid Crystal Display and Pulse Adjustment Circuit Thereof |
| CN101515440A (en) * | 2008-02-19 | 2009-08-26 | 奇美电子股份有限公司 | Driving circuit and method, and liquid crystal display device applied thereby |
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2010
- 2010-09-03 CN CN2010102716291A patent/CN102385830A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060055687A1 (en) * | 2004-09-15 | 2006-03-16 | Industrial Technology Research Institute | Brightness control circuits |
| CN1645465A (en) * | 2005-01-31 | 2005-07-27 | 广辉电子股份有限公司 | Grid driving method and circuit of liquid crystal displaying device |
| US20070216563A1 (en) * | 2006-01-02 | 2007-09-20 | Wu Zhong Y | Bit-adjacency capacitor-switched DAC, method, driver and display device |
| US20080225035A1 (en) * | 2007-03-15 | 2008-09-18 | Au Optronics Corp. | Liquid Crystal Display and Pulse Adjustment Circuit Thereof |
| CN101515440A (en) * | 2008-02-19 | 2009-08-26 | 奇美电子股份有限公司 | Driving circuit and method, and liquid crystal display device applied thereby |
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| CB02 | Change of applicant information |
Address after: Guangdong province Shenzhen City, Longhua Town, Foxconn science and Technology Industrial Park E District 4 building, building 1, building Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant after: Chimei Optoelectronics Co., Ltd. Address before: Miaoli County, Taiwan, China Applicant before: Chimei Optoelectronics Co., Ltd. Co-applicant before: Qunkang Technology (Shenzhen) Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: QIMEI ELECTRONIC CO LTD TO: QUNKANG TECHNOLOGY (SHENZHEN) CO., LTD. |
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Application publication date: 20120321 |