CN102097064A - Method and system for controlling scanning pause and reply of liquid crystal display - Google Patents
Method and system for controlling scanning pause and reply of liquid crystal display Download PDFInfo
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- CN102097064A CN102097064A CN2009102590089A CN200910259008A CN102097064A CN 102097064 A CN102097064 A CN 102097064A CN 2009102590089 A CN2009102590089 A CN 2009102590089A CN 200910259008 A CN200910259008 A CN 200910259008A CN 102097064 A CN102097064 A CN 102097064A
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Abstract
The invention discloses a method and a system for controlling scanning pause and reply of a liquid crystal display. The method comprises the following steps of: monitoring a video source, and recording current scanning line position and corresponding polarity; when an abnormal video source is detected, stopping scanning of a liquid crystal panel from the pause scanning line of a pause frame, wherein the pause scanning position corresponds to a pause polarity; when a normal video source is detected, determining a reply scanning line or/and a reply polarity; replying the scanning of the liquid crystal panel from the reply scanning line, wherein the replying position is as same as the pause scanning line; or/and when the reply polarity is matched with the pause polarity, performing reply.
Description
Technical field
The present invention relates to LCD, particularly relate to the system and method that a kind of scanning of controlling LCD suspends and replys.
Background technology
LCD generally is used in televisor and the various electronic installation.Characteristic according to liquid crystal molecule; usually can be in fixed intervals; for example each frame (frame), each row, each row or each pixel; use reversal of poles (polarity inversion) mechanism to change the direction of electric field, make electric polarity to obtain changing in each frame, each row, each row or each pixel.Fig. 1 shows two consecutive frames that use row counter-rotatings (row inversion).In frame N, the polarity of first row is just "+", that the polarity of secondary series then becomes is negative " ", by that analogy.In frame N+1, the polarity of first row is negative "-", and it is in contrast to the first row polarity of former frame N.
In television broadcasting or general electronic communication, can be subjected to the influence of noise or interference usually.After liquid crystal TV set receives this noise, can cause onlooker's interference.The 4th row that Fig. 2 is illustrated in frame N are subjected to interference of noise, thereby suspend the demonstration of remaining columns.After interrupting answer, frame N+1 promptly begins to show from first row.It should be noted that the last display column (that is, the 3rd row) of frame N and next row that continue of frame N+1 (that is the 4th is listed as) have identical polarity "+", as arrow indication among the figure, this kind situation can allow the onlooker feel flicker.
In view of conventional liquid crystal can't be replied effectively from the interruption that noise causes, therefore need badly and propose a kind of novel mechanism, in order to flicker or other interference of avoiding causing, and promoted the quality that video signal shows because of Recovery Process.
Summary of the invention
In view of above-mentioned, one of purpose of the embodiment of the invention is to propose a kind of scanning time-out of LCD and system and method for replying controlled, and makes that the Recovery Process of interrupting can be more steady or continuous, to reduce or to avoid glimmering.
According to the embodiment of the invention, the video signal source that monitors is detecting the unusual of video signal source, and record current scanline line position and corresponding polarity.When detecting when unusual, i.e. the scanning of stop solution crystal panel, wherein the liquid crystal panel location definition that begins to stop to scan is one to suspend sweep trace, its corresponding polarity is defined as one and suspends polarity, and corresponding frame definition is a pause frame.When detecting the video signal source for just often, promptly determine one of following parameters or reply sweep traces at two: one, its position is same as the time-out sweep trace; Reach one and reply polarity, it makes the polarity of replying frame be same as the polarity of pause frame.According to one of following condition or two to reply the scannings of liquid crystal panel: reply in replying the sweep trace place; And the polarities match of working as the answer frame is replied in the polarity chron of pause frame.
Description of drawings
Fig. 1 shows two consecutive frames that use the row counter-rotating.
Fig. 2 is illustrated in frame N and is subjected to interference of noise, and replys from interruption in frame N+1.
Fig. 3 shows the functional block diagram of LCD.
The functional block diagram of Fig. 4 shows the system that the scanning of control LCD suspends and replys.
The process flow diagram of Fig. 5 shows the method that the scanning of control LCD suspends and replys.
The sequential chart of Fig. 6 A view similar, it has shown start signal STV and output enable signal OE.
Fig. 6 B shows that start signal STV, output enable signal OE, polarity inversion signal POL are near the expansion sequential chart the time t1 (Fig. 6 A).
Fig. 6 C shows that start signal STV, output enable signal OE, polarity inversion signal POL are near the expansion sequential chart the time t2 (Fig. 6 A).
The reference numeral explanation
30 time schedule controllers
32 scanner drivers
34 liquid crystal panels
36 data drivers
The system that 4 gated sweeps suspend and reply
41 detecting units
43 record cells
45 control signal generators
47 positions/polarity decision unit
The method that 5 gated sweeps suspend and reply
The 51-57 step
LV LVDS video signal
LVCLK video signal frequency
The OE output enable signal
The POL polarity inversion signal
The STV start signal
Embodiment
Fig. 3 shows the functional block diagram of LCD.Time schedule controller (Tcon) 30 receiving video sources, for example Low Voltage Differential Signal form (low-voltage differential signaling, LVDS) video signal LV and corresponding video signal frequency LVCLK.Time schedule controller 30 produces output enable signal OE to scanner driver (or gate drivers) 32.When output enable signal OE was active (for example " 0 "), scanner driver 32 promptly scanned each pixel column of liquid crystal panel 34 in regular turn; When output enable signal OE was non-active (for example " 1 "), scanner driver 32 was the scanning of stop solution crystal panel 34.Time schedule controller 30 is gone back polarization reverse signal POL to data driver (or source electrode driver) 36, and the video signal data that makes data driver 36 be exported has the suitable potential corresponding to pixel polarity.
The functional block diagram of Fig. 4 shows the system 4 that the scanning of control LCD suspends and replys, and LCD wherein can be LCD shown in Figure 3.The process flow diagram of Fig. 5 shows the method 5 that the scanning of control LCD suspends and replys.
In the present embodiment, system 4 can be implemented on time schedule controller 30 inside of Fig. 3.Detecting unit 41 monitors that the video signal source is to detect unusual (step 51) in video signal source.In the present embodiment, detecting unit 41 monitors video signal frequency LVCLK, whether is positioned at the confining spectrum of normal video signal frequency LVCLK with the frequency of decision video signal frequency LVCLK.Unusual video signal frequency LVCLK represents that video signal LV may just be subjected to the influence of noise or interference.
When monitoring, record cell 43 writes down current scanline line position and corresponding polarity (step 52) constantly or off and on.For example, for the row inversion mechanism, be record current scanline line position (or number) and corresponding polarity.
When detecting unit 41 when to detect video signal frequency LVCLK be unusual (step 53), control signal generator 45 promptly produces time-out/answer control signal, in order to output enable signal OE being become non-active (or draw high its current potential), thereby the scanning (step 54) of stop solution crystal panel 34.By this, the scanning demonstration promptly is suspended.In this simultaneously, this time-out sweep trace also is recorded unit 43 and notes.In other words, liquid crystal panel 43 begins to stop the special annotation of scan lines displayed quilt for suspending sweep trace.Moreover this time-out sweep trace suspends polarity accordingly or the corresponding first pixel polarity of pause frame also goes on record.
The sequential chart of Fig. 6 A view similar, it has shown start signal STV and output enable signal OE.Start signal STV was normally according to vertical synchronizing signal produced, in order to representing the initial of a frame.Among the preface figure, the n sweep trace of (originating in time t1's) pause frame is subjected to noise, thereby the current potential of output enable signal OE is drawn high at this moment.In other words, in this example, the time-out sweep trace is the n sweep trace.Fig. 6 B shows that start signal STV, output enable signal OE, polarity inversion signal POL are near the expansion sequential chart the time t1 (Fig. 6 A).According to the illustrated sequential chart of Fig. 6 B, be negative "-" corresponding to the first pixel polarity of this pause frame.
Next, when detecting unit 41 detects video signal frequency LVCLK and replied (step 55), position/polarity decision unit 47 promptly determines an appropriate location (or sweep trace) and polarity, in order to reply the scanning of liquid crystal panel 34.In the present embodiment, position/polarity decision unit 47 can be kept the state of time-out, can mate (identical) till suspending polarity (step 56) up to the answer polarity of a frame.In polarities match the time, output enable signal OE promptly becomes initiatively (or current potential drags down), makes to be same as when suspending scan line position when replying scan line position, begins to reply to scan (step 57).At this moment, control signal generator 45 is that the polarization control signal is given time schedule controller 30, in order to export a suitable polarity inversion signal POL to data driver 36.According to another embodiment, it does not wait for the coupling of polarity, but is replying the scan line position place, and the forcibly changing electric polarity makes it become required answer polarity.
Consult Fig. 6 A, after polarities match, output enable signal OE is dragged down in the n sweep trace place of (originating in time t2's) answer frame.In other words, the answer sweep trace is the n sweep trace, and it is same as the time-out sweep trace.Fig. 6 C shows that start signal STV, output enable signal OE, polarity inversion signal POL are near the expansion sequential chart the time t2 (Fig. 6 A).According to the illustrated sequential chart of Fig. 6 C, be negative "-" corresponding to this answer polarity of replying first pixel of frame.
According to the foregoing description, reply the same position that sweep trace originates in the time-out sweep trace by allowing, thereby make liquid crystal panel 34 be replied scanning reposefully.Except same position, the polarity of replying sweep trace also is same as the polarity of suspending sweep trace.By this, can avoid the flicker that causes as traditional Recovery Process or other to disturb, thereby be promoted the quality that video signal shows.
According to another embodiment of the present invention, it uses the polarity determination device but not position/polarity decision unit 47 shown in Figure 4.In the present embodiment, do not need to write down the position of suspending sweep trace, need not determine to reply the position of sweep trace yet.In the present embodiment, in case after the polarities match (step 56), promptly locate to begin to reply scanning in article one sweep trace (but not answer sweep trace of last embodiment) of replying frame.
According to further embodiment of this invention, its use location determination device but not position shown in Figure 4/polarity decision unit 47.In the present embodiment, do not need record to suspend polarity, need not determine to reply polarity yet.In the present embodiment, replied back (step 55), promptly, begun to reply scanning (step 57) in the answer scan line position of (present frame or next frame) (that is, be same as the position of suspending sweep trace) in case detecting unit 41 detects video signal frequency LVCLK.
The above is preferred embodiment of the present invention only, is not in order to limit claim of the present invention; All other do not break away from the equivalence of being finished under the spirit that invention discloses and changes or modify, and all should be included in the claim of the present invention.
Claims (20)
1. control the scanning time-out of LCD and the method for replying for one kind, comprise:
Monitor a video signal source, to detect the unusual of this video signal source;
Record current scanline line position and corresponding polarity;
When detecting this when unusual, promptly stop the scanning of a liquid crystal panel, wherein this liquid crystal panel location definition of beginning to stop to scan is one to suspend sweep trace, its corresponding polarity is defined as one and suspends polarity, and corresponding frame definition is a pause frame;
When detecting this video signal source for just often, promptly determine one of following parameters or reply sweep traces at two: one, its position is same as this time-out sweep trace; Reach one and reply polarity, it makes a polarity of replying frame be same as the polarity of this pause frame; And
According to one of following condition or two to reply the scanning of this liquid crystal panel: reply in this answer sweep trace place; And work as this polarities match of replying frame in the polarity chron of this pause frame, reply.
2. control the scanning time-out of LCD and the method for replying according to claim 1, wherein above-mentioned video signal source comprises a video signal frequency.
3. the method for suspending and replying as the scanning of control LCD as described in the claim 2, the frequency of wherein above-mentioned video signal frequency is monitored whether be positioned at the confining spectrum of normal video signal frequency to determine it.
4. control the scanning time-out of LCD and the method for replying according to claim 1,, an output enable signal that is fed to the scanner driver of this LCD is become non-active in stopping in the scanning step of above-mentioned liquid crystal panel.
5. the method for suspending and replying as the scanning of control LCD as described in the claim 4 in the answer scanning step of above-mentioned liquid crystal panel, becomes this output enable signal initiatively.
6. control the scanning time-out of LCD and the method for replying according to claim 1, the polarity of wherein above-mentioned answer frame is the electric polarity by this liquid crystal panel of forcibly changing, makes it be matched with the polarity of this pause frame.
7. control the method that the scanning of LCD suspends and replys according to claim 1, wherein the polarity of above-mentioned sweep trace is a polarity inversion signal that is decided by to be fed to the data driver of this LCD.
8. control the scanning time-out of LCD and the method for replying according to claim 1, when this answer scanning did not originate in this answer sweep trace, then this answer frame was promptly replied since first sweep trace.
9. control the scanning time-out of LCD and the method for replying according to claim 1, wherein the time-out polarity of above-mentioned pause frame is the polarity that is defined as first pixel of this time-out sweep trace or this first sweep trace.
10. control the method that the scanning of LCD suspends and replys according to claim 1, wherein first pixel of above-mentioned frame is defined by an initial signal, and this start signal is that the vertical synchronizing signal according to this video signal source produces.
11. control the scanning time-out of LCD and the system of replying, comprise for one kind:
One detecting unit in order to monitoring a video signal source, to detect the unusual of this video signal source, by this, when detecting this when unusual, promptly stops the scanning of a liquid crystal panel;
One record cell, in order to record current scanline line position and corresponding polarity, wherein this liquid crystal panel location definition of beginning to stop to scan is one to suspend sweep trace, its corresponding polarity is defined as one and suspends polarity, and corresponding frame definition is a pause frame;
Decision unit, one position/polarity, when detecting this video signal source for just often, promptly determine one of following parameters or two: one answer sweep traces, its position is same as this time-out sweep trace; Reach one and reply polarity, it makes a polarity of replying frame be same as the polarity of this pause frame; And
One control signal generator, its according to the result of this detecting unit and this position/polarity decision unit producing control signal, and according to one of following condition or two to reply the scanning of this liquid crystal panel: reply in this answer sweep trace place; And work as this polarities match of replying frame in the polarity chron of this pause frame, reply.
12. as the system that the scanning of control LCD as described in the claim 11 suspends and replys, wherein above-mentioned video signal source comprises a video signal frequency.
13. as the system that the scanning of control LCD as described in the claim 12 suspends and replys, the frequency of wherein above-mentioned video signal frequency is monitored whether be positioned at the confining spectrum of normal video signal frequency to determine it.
14. the system that suspends and reply as the scanning of control LCD as described in the claim 11, wherein above-mentioned liquid crystal panel to stop scanning be according to this control signal, an output enable signal that is fed to the scanner driver of this LCD is become non-active.
15. as the system that the scanning of control LCD as described in the claim 14 suspends and replys, wherein the answer of above-mentioned liquid crystal panel scanning is according to this control signal, and this output enable signal is become initiatively.
16. as the system that the scanning of control LCD as described in the claim 11 suspends and replys, the polarity of wherein above-mentioned answer frame is the electric polarity by this liquid crystal panel of forcibly changing, makes it be matched with the polarity of this pause frame.
17. the system that suspends and reply as the scanning of control LCD as described in the claim 11, wherein the polarity of above-mentioned sweep trace is a polarity inversion signal that is decided by to be fed to the data driver of this LCD.
18. the system that suspends and reply as the scanning of control LCD as described in the claim 11, when this answers scans when not originating in this answer sweep trace, then this answer frame is promptly replied since first sweep trace.
19. as the system that the scanning of control LCD as described in the claim 11 suspends and replys, wherein the time-out polarity of above-mentioned pause frame is the polarity that is defined as first pixel of this time-out sweep trace or this first sweep trace.
20. as the system that the scanning of control LCD as described in the claim 11 suspends and replys, wherein first pixel of above-mentioned frame is defined by an initial signal, this start signal is that the vertical synchronizing signal according to this video signal source produces.
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| CN 200910259008 CN102097064B (en) | 2009-12-09 | 2009-12-09 | Method and system for controlling scanning pause and reply of liquid crystal display |
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| CN 200910259008 CN102097064B (en) | 2009-12-09 | 2009-12-09 | Method and system for controlling scanning pause and reply of liquid crystal display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398838A (en) * | 2018-02-09 | 2018-08-14 | 友达光电股份有限公司 | Image display device, image display device drive control circuit and drive method thereof |
| CN109830213A (en) * | 2017-11-23 | 2019-05-31 | 奇景光电股份有限公司 | Show equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365094A (en) * | 2000-12-04 | 2002-08-21 | 株式会社日立制作所 | Liquid crystal display device |
| CN1470930A (en) * | 2002-06-27 | 2004-01-28 | 株式会社日立显示器 | Dispalying device and its driving method |
| CN1873745A (en) * | 2005-05-31 | 2006-12-06 | 三星Sdi株式会社 | Electron emission display and driving method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6084562A (en) * | 1997-04-02 | 2000-07-04 | Kabushiki Kaisha Toshiba | Flat-panel display device and display method |
| US6469684B1 (en) * | 1999-09-13 | 2002-10-22 | Hewlett-Packard Company | Cole sequence inversion circuitry for active matrix device |
| CN101276536B (en) * | 2004-09-06 | 2010-04-14 | 索尼株式会社 | Image display unit and method of driving the same |
| JP2007183464A (en) * | 2006-01-10 | 2007-07-19 | Nec Lcd Technologies Ltd | Flicker adjusting system for liquid crystal display device |
-
2009
- 2009-12-09 CN CN 200910259008 patent/CN102097064B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1365094A (en) * | 2000-12-04 | 2002-08-21 | 株式会社日立制作所 | Liquid crystal display device |
| CN1470930A (en) * | 2002-06-27 | 2004-01-28 | 株式会社日立显示器 | Dispalying device and its driving method |
| CN1873745A (en) * | 2005-05-31 | 2006-12-06 | 三星Sdi株式会社 | Electron emission display and driving method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830213A (en) * | 2017-11-23 | 2019-05-31 | 奇景光电股份有限公司 | Show equipment |
| CN108398838A (en) * | 2018-02-09 | 2018-08-14 | 友达光电股份有限公司 | Image display device, image display device drive control circuit and drive method thereof |
| CN108398838B (en) * | 2018-02-09 | 2021-06-04 | 友达光电股份有限公司 | Image display device, image display device drive control circuit and drive method thereof |
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