CN100338567C - Method for data transmission interface - Google Patents
Method for data transmission interface Download PDFInfo
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- CN100338567C CN100338567C CNB2004100379086A CN200410037908A CN100338567C CN 100338567 C CN100338567 C CN 100338567C CN B2004100379086 A CNB2004100379086 A CN B2004100379086A CN 200410037908 A CN200410037908 A CN 200410037908A CN 100338567 C CN100338567 C CN 100338567C
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- differential wave
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- accurate position
- direct current
- data bit
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Abstract
The present invention relates to a data transmission interface method which is applied to an input interface of a liquid crystal display. The method solves the problem that in the transmission mode of traditional reduced swing differential signals, a pair of data lines can only grasp data with one bit. According to the existing mode, the data quantity which needs to be transmitted is large, the required data lines are more, and the occupied space and the cost are great. The present invention utilizes the conversion of direct current (DC) normal positions to generate alternating current (AC) normal positions to create more data which can be grasped. Two pairs of data lines have two groups of DC normal positions, and the data with a third bit can be generated. Four pairs of data lines have four groups of DC normal positions, and the data with seven bits can be generated alternately. By analogy, when the transferred data quantity is large, the saved data lines are more, the occupied space is less, and the cost is low.
Description
Technical field
The invention relates to a kind of method of data transmission interface, and particularly about a kind of method of data transmission interface of differential wave.
Background technology
In recent years, because advantages such as that display panels has is in light weight, size thin, area is changeable, low operating voltage, power saving and radiationless lines, become the main flow of display panel gradually.Particularly, for portable electronic device, for example, the screen of mobile computer, mobile phone screen, PDA (Personal Digital Assistant) (Personal Digital Assistance, " PDA ") display screen etc., have only LCD screen just can meet its demand especially, so the technology of display panels and needed data transmission interface thereof have more and more important trend.
What the data transmission interface of conventional thin film transistor LCD was more often used is that (Reduced Swing Differential signaling is to call in the following text: transmission method RSDS) for the low-swing differential signal.Fig. 1 is the transmission method figure that illustrates existing RSDS.Please refer to Fig. 1, the transmission mode of traditional RSDS is that a pair of data line (D00P-D00N) can grasp the data of 1 (bit); Two pairs of data lines (D00P-D00N) and (D01P-D01N) then can grasp 2 data; Three pairs of data lines (D00P-D00N), (D01P-D01N) and (D02P-D02N) then can grasp 3 data by that analogy, when needing the data of N position, just need N reward for writing or painting stockline just can satisfy the demands.
So it is bigger to work as the data quantity of required transmission, its required data line will be the more, and shared space is also bigger, and cost spends and also can become higher.
Summary of the invention
Purpose of the present invention is to provide a kind of data transmission interface method exactly, and per two pairs of signals that data line transmitted just by the every accurate position of direct current voltage in order to transmit 2 data bit, produce an extra data bit.This can apply to has plural number on the data line, the rank, transmission voltage position of the per 2 data bit extra data bit that can swing out.Can reach and utilize limited data line, create the data bit of transmitting more.
For achieving the above object, the present invention proposes a kind of method of data transmission interface, is the data transmission architecture of utilization differential wave.The method of this data transmission interface comprises the accurate position of first direct current of selecting first pair of differential wave source, and as first differential wave, wherein first pair of differential wave source is in order to produce one first data bit.Select the accurate position of second direct current in second pair of differential wave source, as second differential wave, wherein second pair of differential wave source is in order to produce one second data bit.And produce one the 3rd data bit according to first differential wave and second differential wave.
The method of above-mentioned data transmission interface, in one embodiment, when the accurate position of first direct current was higher than the accurate position of second direct current, the 3rd data bit was a logical zero, and when the accurate position of first direct current was lower than the accurate position of second direct current, the 3rd data bit was a logical one.
For achieving the above object, the present invention proposes a kind of method of data transmission interface, is the data transmission architecture of utilization differential wave, and wherein the data transmission architecture of this differential wave comprises the differential wave source that plural number is right.The method of this data transmission interface comprises the accurate position of two direct currents that had according to per two pairs differential wave source, produces the right differential wave source of extra plural number, and produces corresponding plurality of data position according to extra right differential wave source.
The method of above-mentioned data transmission interface in one embodiment, is more selected the accurate position of direct current in per two pairs differential wave source in these extra right differential wave sources, produces extra data bit.
For achieving the above object, the present invention proposes a kind of method of data transmission interface, the data transmission architecture of utilization differential wave, and the data transmission architecture of this differential wave comprises the differential wave source that plural number is right.The method of this data transmission interface comprises the accurate position of first direct current of selecting first pair of differential wave source, and as first differential wave, wherein first pair of differential wave source is in order to produce one first data bit.Select the accurate position of second direct current in second pair of differential wave source, as second differential wave, wherein second pair of differential wave source is in order to produce one second data bit.Select the accurate position of the 3rd direct current in the 3rd pair of differential wave source, as one the 3rd differential wave, wherein the 3rd pair of differential wave source is in order to produce the 3rd data bit.Select the accurate position of the 4th direct current in the 4th pair of differential wave source, as the 4th differential wave, wherein the 4th pair of differential wave source is in order to produce the 4th data bit.Produce the 5th data bit through interlocking according to the first above-mentioned differential wave and second differential wave, produce the 6th data bit through interlocking according to the 3rd above-mentioned differential wave and the 4th differential wave, and according to the accurate position of one the 5th direct current of the first above-mentioned differential wave and second differential wave, and the accurate position of one the 6th direct current of the 3rd differential wave and the 4th differential wave, staggered again one the 7th data bit that produces.
The method of above-mentioned data transmission interface, in one embodiment, when the accurate position of first direct current was higher than the accurate position of second direct current, this 5th data bit was a logical zero, and when the accurate position of first direct current was lower than the accurate position of second direct current, then this 5th data bit was a logical one.When the accurate position of the 3rd above-mentioned direct current was higher than the accurate position of the 4th direct current, the 6th data bit was a logical zero, and when the accurate position of the 3rd direct current was lower than the accurate position of the 4th direct current, the 6th data bit was a logical one.When the accurate position of the 5th above-mentioned direct current was higher than the accurate position of the 6th direct current, the 7th data bit was a logical zero, and when the accurate position of the 5th direct current was lower than the accurate position of the 6th direct current, the 7th data bit was a logical one.
The present invention is converted to the method that exchanges accurate position because of adopting with the accurate position of direct current, therefore can produce the data lines that grasp more, solve the disappearance that a pair of data line in the transmission method of traditional low-swing differential signal (RSDS) only can grasp 1 data bit, reach the effect of saving data line, dwindling the space and reducing cost.
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated.
Description of drawings
Fig. 1 is the transmission method figure of existing RSDS.
Fig. 2 is direct current and the accurate bit timing synoptic diagram of alternating voltage when illustrating the data transmission of a kind of data transmission interface method according to one preferred embodiment of the present invention.
Fig. 3 is direct current and the accurate position of an alternating voltage synoptic diagram when illustrating the data transmission of data transmission interface method of Fig. 2, and the voltage quasi position sequential synoptic diagram of 3 data bit D0, D1 being produced and D2.
Fig. 4 is direct current and the accurate bit timing synoptic diagram of alternating voltage when illustrating the data transmission of a kind of data transmission interface method of another preferred embodiment according to the present invention.
Figure number explanation in the accompanying drawing
D00P-D00N, D01P-D01N, D02P-D02N: data line
D0～D6: data bit
P0～P6, N0～N6: the differential wave of data bit
Vcom0～Vcom6: the accurate position of direct current
Embodiment
The present invention proposes a kind of data transmission interface method, utilize the acquisition conversion of the accurate position of direct current (DC) as the method that exchanges (AC) accurate position, with limited data line, create the data bit that grasp more, the data transmission amount is healed when big, the data line of being saved just the more, institute takes up space and also diminishes the also cost that can reduce cost.
And the method for this data transmission interface please refer to Fig. 2, direct current and the accurate bit timing synoptic diagram of alternating voltage when it illustrates the data transmission of a kind of data transmission interface method according to one preferred embodiment of the present invention.Be as the criterion as the signal voltage that originally is used for transmitting 2 positions (bit) data in low-swing differential signal (RSDS) transmission method that Fig. 2 illustrated, can utilize swing out the data of 3 positions of the rank, transmission voltage position of this 2 data bit, that is to say, utilize the existing data that can transmit 3 positions in order to the differential wave that transmits 2 data bit.And this differential wave circuit that transmits 2 data bit has eight kinds of states, describes in detail according to icon below.
2 data bit that originally transmitted, D0 as shown in the figure and D1 have two pairs of different data lines, and the P0 of its voltage quasi position such as icon and N0, and P1 and N1, with as differential signal source, wherein the accurate position of the direct current of data bit D0 and D1 is respectively Vcom0 and Vcom1.
The data transmission interface method of the embodiment of the invention except original 2 data bit D0 and D1, more can produce an other data bit D2 according to different voltage quasi position P0/N0 and the P1/N1 that data line had of two couples in order to transmission.The generation of the data differential wave of this data bit D2 then is the data bit of being interlocked and being swung and make new advances by accurate Vcom0 of the direct current of data bit D0 and D1 and Vcom1 respectively, and the accurate position of the direct current of the data bit D2 that it is new is the Vcom2 of icon.
As mentioned above, please refer to Fig. 3, direct current and the accurate position of alternating voltage synoptic diagram when it illustrates the data transmission of data transmission interface method of Fig. 2, and the voltage quasi position sequential synoptic diagram of 3 data bit D0, D1 being produced and D2.New data bit D2 is the accurate position of direct current (DC) that utilizes data bit D0 and D1, be converted to interchange (AC) method generated, so the accurate position of former data bit D0 direct current Vcom0 just is differential wave P2 wherein D2, and the accurate position of the direct current of former data bit D1 Vcom1 also is another differential wave N2 D2, Vcom0 and Vcom1 are one group of differential wave of new bit D2, and Vcom2 is the accurate position of the direct current of D2.
New transmission method as mentioned above, please refer to table 1, is depicted as 8 kinds of states that 2 data bit lines produce 8 kinds of arrangement modes of 3 data bit.When the differential wave P0 of data bit D0 greater than N0 or P0 during greater than the accurate position of the direct current Vcom0 of data bit D0, the data that is positioned at the data line of data bit D0 is output as 0, otherwise is 1.During greater than the accurate position of the direct current Vcom1 of data bit D1, the data that is positioned at the data line of data bit D1 is output as 0 to the differential wave P1 of data bit D1, otherwise is 1 greater than N1 or P1.The output of data bit D2 can be by the accurate position decision of the direct current of data bit D0 or D1, when Vcom0 is output as 0 greater than Vcom2 or Vcom0 during greater than Vcom1, otherwise is 1.
Table 1 (V1＞V2＞V3＞V4)
| D0 | D1 | D2 | V1 | V2 | V3 | V4 |
| 0 0 0 0 1 1 1 1 | 0 0 1 1 1 1 0 0 | 0 1 0 1 0 1 0 1 | P0 P1 P0 N1 N0 N2 N0 P1 | N0 N1 N0 P1 P0 P1 P0 N1 | P1 P0 N1 P0 N1 N0 P1 N0 | N1 N0 P1 N0 P1 P0 N1 P0 |
Theory according to the data transmission interface method of the foregoing description, per two pairs of signals that data line transmitted, just every in order to transmit the signal voltage of 2 data bit, can produce an extra data bit, can apply to and have plural number on the data line, the rank, transmission voltage position of the per 2 data bit extra data bit that can swing out.So can create the data bit that grasp more, the data transmission amount is healed when big at limited data line, the data line of being saved just the more, institute takes up space and also diminishes the also cost that can reduce cost.For example, if data transmission interface has four pairs of data line groups, four pairs of different differential waves just, the accurate position of direct current that four groups of different accurate positions are then arranged, seven groups of different differential waves can swing out, have 128 kinds of states, direct current and the accurate bit timing synoptic diagram of alternating voltage when this can be with reference to the data transmission of a kind of data transmission interface method of one embodiment of the present invention of Fig. 4.
Data transmission interface method as the embodiment of the invention that Fig. 4 illustrated, four data bit that it is transmitted originally, D0 as shown in the figure, D1, D2 and D3, have four pairs of different data lines, and the P0 of its voltage quasi position such as icon and N0, P1 and N1, P2 and N2 and P3 and N3, with as differential signal source, wherein the accurate position of the direct current of data bit D0, D1, D2 and D3 is respectively Vcom0, Vcom1, Vcom2 and Vcom3.According to the theory of data transmission interface method provided by the present invention, per two differential signal sources can produce an extra data bit, and these four data bit D0, D1, D2 and D3 can additionally produce other data bit D4, D5 and D6.As shown in Figure 4, the direct current of data bit D0 and D1 accurate position Vcom0 and Vcom1 can be as two differential signal sources of data bit D4, in order to produce data bit D4.The direct current of data bit D2 and D3 accurate position Vcom2 and Vcom3 can be as two differential signal sources of data bit D5, in order to produce data bit D5.And data bit D4 that increases newly and D5, its direct current accurate position Vcom4 and Vcom5, then can be further as two differential signal sources of data bit D6, in order to produce data bit D6.As from the foregoing, the data transmission interface method of the embodiment of the invention, except transmit four data bit D0, D1, D2 and D3, more can increase extra data bit D4, D5 and D6.Just four pairs of data lines can transmit seven data bit.
According to data transmission interface method proposed by the invention, can solve the disappearance that existing a pair of data line only can grasp 1 data bit, and make the N group data line of the differential wave P that respectively has oneself and N and the accurate position of direct current Vcom, change by accurate position and can produce the data line of 2N-1 group altogether.Allow to limited data line, create the data bit that grasp more.When the data transmission amount heals when big, save data line the more, can reduce the space, also can reduce cost.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, thus protection scope of the present invention when with claims were defined is as the criterion.
Claims (8)
1. the method for a data transmission interface is the data transmission architecture of utilization differential wave, and the method for wherein said data transmission interface comprises:
Select the accurate position of one first direct current in one first pair of differential wave source, as one first differential wave, wherein said first pair of differential wave source is in order to produce one first data bit;
Select the accurate position of one second direct current in one second pair of differential wave source, as one second differential wave, wherein said second pair of differential wave source is in order to produce one second data bit; And
Accurate position according to described first differential wave and described second differential wave produces one the 3rd data bit.
2. the method for data transmission interface as claimed in claim 1, wherein when the accurate position of described first direct current is higher than the accurate position of described second direct current, described the 3rd data bit is a logical zero, and when the accurate position of described first direct current was lower than the accurate position of described second direct current, described the 3rd data bit was a logical one.
3. the method for a data transmission interface is the data transmission architecture of utilization differential wave, and the data transmission architecture of wherein said differential wave comprises the differential wave source that plural number is right, and the method for wherein said data transmission interface comprises:
The accurate position of two direct currents that had according to per two pairs differential wave source produces the right differential wave source of extra plural number, and produces corresponding plurality of data position according to the accurate position in described extra right differential wave source.
4. the method for data transmission interface as claimed in claim 3 is wherein also selected the accurate position of direct current in per two pairs differential wave source in described extra right differential wave source, produces extra data bit again.
5. the method for a data transmission interface is the data transmission architecture of utilization differential wave, and the data transmission architecture of described differential wave comprises the differential wave source that plural number is right, and the method for wherein said data transmission interface comprises:
Select the accurate position of one first direct current in one first pair of differential wave source, as one first differential wave, wherein said first pair of differential wave source is in order to produce one first data bit;
Select the accurate position of one second direct current in one second pair of differential wave source, as one second differential wave, wherein said second pair of differential wave source is in order to produce one second data bit;
Select the accurate position of one the 3rd direct current in one the 3rd pair of differential wave source, as one the 3rd differential wave, wherein said the 3rd pair of differential wave source is in order to produce one the 3rd data bit;
Select the accurate position of one the 4th direct current in one the 4th pair of differential wave source, as one the 4th differential wave, wherein said the 4th pair of differential wave source is in order to produce one the 4th data bit; And
Accurate position according to described first differential wave and described second differential wave produces one the 5th data bit;
Accurate position according to described the 3rd differential wave and described the 4th differential wave produces one the 6th data bit;
According to the accurate position of one the 5th direct current of described first differential wave and described second differential wave, and the accurate position of one the 6th direct current of described the 3rd differential wave and described the 4th differential wave, one the 7th data bit produced.
6. the method for data transmission interface as claimed in claim 5, wherein when the accurate position of described first direct current is higher than the accurate position of this second direct current, described the 5th data bit is a logical zero, and when the accurate position of described first direct current was lower than the accurate position of described second direct current, described the 5th data bit was a logical one.
7. the method for data transmission interface as claimed in claim 5, wherein when the accurate position of described the 3rd direct current is higher than the accurate position of described the 4th direct current, described the 6th data bit is a logical zero, and when the accurate position of described the 3rd direct current was lower than the accurate position of described the 4th direct current, described the 6th data bit was a logical one.
8. the method for data transmission interface as claimed in claim 5, wherein when the accurate position of described the 5th direct current is higher than the accurate position of described the 6th direct current, described the 7th data bit is a logical zero, and when the accurate position of described the 5th direct current was lower than the accurate position of described the 6th direct current, described the 7th data bit was a logical one.
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| CNB2004100379086A CN100338567C (en) | 2004-05-10 | 2004-05-10 | Method for data transmission interface |
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| CNB2004100379086A CN100338567C (en) | 2004-05-10 | 2004-05-10 | Method for data transmission interface |
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| CN100338567C true CN100338567C (en) | 2007-09-19 |
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| CN101226511B (en) * | 2007-01-18 | 2010-09-29 | 鸿富锦精密工业（深圳）有限公司 | Signal transmission structure |
| CN101295991B (en) * | 2007-04-25 | 2011-08-17 | 瑞鼎科技股份有限公司 | Receiving circuit and signal receiving method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10198316A (en) * | 1997-01-10 | 1998-07-31 | Toshiba Corp | Liquid crystal display device |
| CN1104676C (en) * | 1999-11-25 | 2003-04-02 | 神达电脑股份有限公司 | Display system capable of accepting several kinds of input signal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10198316A (en) * | 1997-01-10 | 1998-07-31 | Toshiba Corp | Liquid crystal display device |
| CN1104676C (en) * | 1999-11-25 | 2003-04-02 | 神达电脑股份有限公司 | Display system capable of accepting several kinds of input signal |
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