CN101887711B - Regulation method of display picture position - Google Patents
Regulation method of display picture position Download PDFInfo
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- CN101887711B CN101887711B CN2010102172004A CN201010217200A CN101887711B CN 101887711 B CN101887711 B CN 101887711B CN 2010102172004 A CN2010102172004 A CN 2010102172004A CN 201010217200 A CN201010217200 A CN 201010217200A CN 101887711 B CN101887711 B CN 101887711B
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Abstract
The invention relates to a regulation method of display picture position, comprising the following steps: calculating the effective pixel number of an image signal within the enabled period of a data enabled signal; comparing the difference of the horizontal resolution of the display with the effective pixel number within the enabled period of the data enabled signal; and according to the difference of the horizontal resolution of the display with the effective pixel number of the image signal, determining a first picture position compensation signal. The method provided by the invention can thoroughly solve the phenomenon of picture deviation because the image signal and the data enabled signal have time difference.
Description
The application is to be on November 28th, 2006 applying date, and application number is 200610144883.9, and denomination of invention is divided an application for the application for a patent for invention of " display menu location regulation method ".
Technical field
The present invention relates to a kind of method of adjustment that is used in picture position on the display, can allow display correctly show the image signal of input, to avoid the generation of picture skew.
Background technology
Along with the progress of science and technology, have big display size, high resolving power, constantly be developed with the display device of frivolous volume, be applied among people's daily life, to promote people's quality of life.No matter be any display device, its signal that is sent to display includes horizontal synchronization signal (Hsync), vertical synchronizing signal (Vsync) and image signal.
Please refer to Fig. 1, Fig. 1 is the sequential chart of screen-picture signal, and to represent vertical synchronizing signal, Hsync to represent horizontal synchronization signal, Video to represent image signal, LE be sweep trace enable signal (Lineenable) to Vsync among Fig. 1.Whenever display is received just new image frame of expression beginning of a Vsync, receive that a Hsync then represents to begin a new sweep trace, and the Hsync signal numerical table between two Vsync signals shows the number of scanning lines of display.And the sweep trace in during the activation of sweep trace enable signal is called effective scanning line (activeline), and effective scanning line is the actual sweep trace that the presentation content of demonstrating is arranged of display.
Please refer to Fig. 2, Fig. 2 is that more detailed level shows the controlling signal explanation, when a Hsync signal occurring, promptly represent sweep trace to finish and another new sweep trace begins, DE signal representative data enable signal (dataenable) signal among Fig. 2, in (during the activation) during the high levle, the Video image signal can be displayed on the display at the DE signal.
The picture position of image signal on display determined by vertical synchronizing signal, horizontal synchronization signal, sweep trace enable signal and data enable signal, vertical synchronizing signal and sweep trace enable signal define the vertical direction scope of display frame, and horizontal synchronization signal and data enable signal then define the horizontal direction scope of display frame.Display is when display frame, sometimes have picture skew but not be presented at correct locational situation, please refer to Fig. 3, Fig. 3 is the origin cause of formation in order to the skew of explanation display frame horizontal direction, when the free drop of image data of data enable signal and image signal, will cause the skew of picture horizontal direction.In like manner, when going up drop if having time between sweep trace enable signal and effective scanning line, will cause the skew of picture vertical direction.This equal time drop may be to cause in the transmission course, also may be the problem in image source itself.
In view of this, the present invention proposes a kind of LCD screen display position method of adjustment at this, to solve the problem of display frame skew.
Summary of the invention
The objective of the invention is to be, a kind of method of adjusting display frame horizontal level and upright position is provided, the problem of picture skew during with solution show image signal.
For achieving the above object, the present invention proposes a kind of display menu location regulation method, is presented at position on the display in order to adjust an image signal, and its step comprises: calculate the effective picture element number at the interval described image signal of a data activation; The difference of effective picture element number of the horizontal resolution of more described display and described image signal; And the difference according to effective picture element number of the horizontal resolution of described display and described image signal determines one first picture position compensation signal.
According to said method, the effective picture element number that wherein calculates described image signal is according to a picture element clock pulse.
According to said method, its step also comprises: on time shaft, move described data activation interval, and calculate effective picture element number of described image signal once more.And described first picture position compensation signal is to determine according to the interval variation of moving effective picture element number of front and back of described data activation.
The present invention proposes a kind of display menu location regulation method in addition, is presented at position on the display in order to adjust an image signal, and its step comprises: calculate in one scan line activation interval the effective scanning line number of described image signal; The difference of the effective scanning line number of the vertical resolution of more described display and described image signal; And the difference according to the effective scanning line number of the vertical resolution of described display and described image signal determines a picture position compensation signal.
According to said method, its step also comprises: on time shaft, move described sweep trace activation interval, and calculate the effective scanning line number of described image signal once more.
According to said method, wherein said picture position compensation signal is to determine according to the interval variation of moving the effective scanning line number of front and back of described line activation.
The present invention proposes a kind of display menu location regulation method in addition, is presented at position on the display in order to adjust an image signal, and its step comprises: define a noise margin value, value is effective picture element greater than the picture element of described noise margin value;
Detect the starting point of effective picture element of described image signal;
Calculate the difference of the starting point of the starting point of effective picture element of described image signal and a data enable signal, obtain one first difference value; And
Utilize described first difference value to adjust a horizontal synchronization signal and described data enable signal, the starting point that makes the leftmost edge of the horizontal display window of described display aim at effective picture element of described image signal.
Description of drawings
Fig. 1 is the sequential chart of screen-picture signal;
Fig. 2 shows the controlling signal sequential chart for level;
Fig. 3 is the synoptic diagram of the free drop of image data of data enable signal and image signal;
The method of adjustment process flow diagram of Fig. 4 horizontal picture skew for the present invention adjusts;
Fig. 5 is the synoptic diagram of mobile data enable signal of the present invention;
Fig. 6 is a free synoptic diagram of going up drop between sweep trace enable signal and effective scanning line;
The method of adjustment process flow diagram of Fig. 7 vertical picture skew for the present invention adjusts;
Fig. 8 is the synoptic diagram of motion scan line enable signal of the present invention;
The synoptic diagram that Fig. 9 has the mistiming for the horizontal display window and the image signal of video data enable signal definition;
Figure 10 is the horizontal picture position method of adjustment process flow diagram of another embodiment of the present invention;
Figure 11 shows horizontal synchronization signal and the data enable signal Td distance that moves right;
The synoptic diagram that the vertical display window of Figure 12 reading scan line enable signal definition and image signal have mistiming Tf;
The process flow diagram of the vertical picture position method of adjustment of Figure 13 another embodiment of the present invention;
Drawing reference numeral explanation: S101～S105 step; S201～S105 step; S301～S104 step; S401～S104 step.
Embodiment
The situation of picture skew taking place when avoiding the display show image, the present invention is directed to the situations of different skews, proposes to adjust the method for picture position.
In one embodiment of this invention, be the method that proposes to adjust picture at the picture drift condition that life period drop between effective picture element of display window and image signal is caused.Please refer to figure three, make picture produce with the image signal section of having mistiming Td by the horizontal display window of data enable signal definition and be offset.Among Fig. 3, the picture element clock pulse is in order to image signal is taken a sample and produce a series of picture element value.When judging effective picture element of image signal, define a noise margin value earlier, value is effective picture element greater than the picture element of described noise margin value.The frequency of the length of data enable signal and picture element clock pulse is that the resolution (true picture element number) according to display device produces, during the activation of data enable signal, the pulse number of picture element clock pulse is the horizontal resolution that equals display device, and should equal the horizontal resolution of display device ideally to the image signal obtained effective picture element number of taking a sample according to the picture element clock pulse, so, because of image signal and the data enable signal section of having mistiming Td, make display frame produce skew.Please refer to Fig. 4, it is the process flow diagram that the present invention is directed to the method for adjustment of this kind situation proposition, at first, defines a noise margin value, and value is effective picture element (step S101) greater than the picture element of described noise margin value.Generally speaking, when if the image signal of input is an analog signal, this image signal can convert signal to a digital signal via analogue-to-digital converters (ADC) after importing a display device, carry out follow-up processing again, and analogue-to-digital converters generally have suitable yield value, so that image signal is moderately amplified, when judging effective picture element of image signal, influence the judgement of effective picture element for avoiding noise to be exaggerated, so can be when judging effective picture element of image signal, appropriateness reduces the yield value of analogue-to-digital converters.Step S102 calculates the effective picture element number of image signal during data enable signal (DE) activation, according to the picture element clock pulse image signal is taken a sample, to obtain the effective picture element number during the activation of data enable signal.
Then, compare the horizontal resolution of display and the difference (step S103) of the effective picture element number during the activation of data enable signal, the gap of the effective picture element number during horizontal resolution and the activation of data enable signal is the degree of picture skew.Next confirm the direction of picture skew, please refer to Fig. 5, on time shaft earlier with the data enable signal to wherein moving (step S104) on one side, suppose to move right earlier, and the scope that moves should be less than the difference value of effective picture element number and horizontal resolution, and then the effective picture element number of calculating during the activation of data enable signal, if the effective picture element number after moving is the words that increase, then definite data enable signal activation interval is moved right can compensate the skew of picture, and can determine a horizontal picture position compensating signature (S105) by the gap value of the effective picture element number during horizontal resolution and the activation of data enable signal, this horizontal frame compensation signal will make the data enable signal described gap value that moves right.If the effective picture element number after moving is the words that reduce, then determine data enable signal activation interval is moved to the left the skew that can compensate picture, similarly, gap value by the effective picture element number during horizontal resolution and the activation of data enable signal can determine the horizontal picture position compensating signature, with the skew of compensation picture.
The present invention also proposes to solve the method for vertical picture skew.Please refer to Fig. 6, when going up drop Tf if having time between sweep trace enable signal and effective scanning line, will cause the skew of picture vertical direction.The method flow diagram of Fig. 7 vertical picture skew for the present invention solves.At first, when judging the effective scanning line of image signal, definition one effective picture element is counted critical value earlier, and when the effective picture element number in the one scan line was counted critical value greater than described effective picture element, then described sweep trace was an effective scanning line (step S201).Effective scanning line (Active Line) number (step S202) of calculating during the activation of sweep trace enable signal.Then, compare the vertical resolution of display and the difference (step S203) of the effective scanning line number of image signal during the activation of sweep trace enable signal, under the vertical unmigrated situation of picture, effective scanning line number during the activation of sweep trace enable signal should equal the horizontal resolution of display device, and under the situation of vertical picture skew, effective scanning line number during the activation of sweep trace enable signal can be less than the vertical resolution of display device, and both difference value promptly are the degree of vertical shift.
Please refer to Fig. 8, on time shaft that the sweep trace enable signal is mobile on one side, suppose the sweep trace enable signal is moved to the right, and the scope that moves should be less than the difference value of effective scanning line number and vertical resolution, then, calculate the effective scanning line number (step S204) during the activation of sweep trace enable signal once more, if the effective scanning line number be before moving for a long time, expression sweep trace enable signal moves right and can compensate the skew of vertical picture, and then determine a vertical picture position compensation signal (step S205) according to the effective scanning line number during the activation of sweep trace enable signal and the difference value of vertical resolution, this vertical picture position compensation signal will make the sweep trace enable signal described difference value that moves right, with the skew of compensation picture.If the effective scanning line number be before moving after a little while, expression sweep trace enable signal will be moved to the left the skew that could compensate vertical picture, and then determine a vertical picture position compensation signal according to the effective scanning line number during the activation of sweep trace enable signal and the difference value of vertical resolution, this vertical picture position compensation signal will make the sweep trace enable signal be moved to the left described difference value, with the skew of compensation picture.
In another embodiment of the present invention, the method that another kind of horizontal picture position is adjusted is proposed, please refer to Fig. 9, it is the horizontal display window of video data enable signal definition and the synoptic diagram that image signal has mistiming Td, is to rely on to adjust the purpose that horizontal synchronization signal reaches the adjustment picture position in the method for this embodiment.Please refer to Figure 10, it is the horizontal picture position method of adjustment process flow diagram of this embodiment.At first, define a noise margin value, value is effective picture element (step S301) greater than the picture element of described noise margin value.A same embodiment, when if the image signal of input is an analog signal, when judging effective picture element of image signal, influence the judgement of effective picture element for avoiding noise to be exaggerated, so can be when judging effective picture element of image signal, appropriateness reduces the yield value of analogue-to-digital converters.Then, the starting point of effective picture element of detecting image signal (step S302), for example the rising edge with horizontal synchronization signal is a benchmark, and then the starting point of the effective picture element of image signal is Tb among Fig. 9, and the purpose of this step is the starting point at the horizontal image of detecting.Calculate the difference value (step S303) of the starting point Ta of the starting point Tb of effective picture element of image signal and data enable signal again, defining its difference value is Td, Td=Tb-Ta then, difference value Td size is the degree of horizontal picture skew, when difference value Td greater than zero the time, representative picture is to right avertence, and when difference value Td less than zero the time, representative picture is to left avertence.Then, utilize described difference value to adjust horizontal synchronization signal and data enable signal, make the starting point (step S304) of the horizontal image signal of leftmost edge aligning of horizontal display window; Please refer to Figure 11,, allow image signal be presented in the middle of the picture horizontal synchronization signal and the data enable signal starting point that the leftmost edge that can make the horizontal display window among this embodiment behind the Td aims at horizontal image signal that moves right.
As the above embodiments, the present invention also proposes the method that a kind of vertical picture position is adjusted, and please refer to Figure 12, and it is the vertical display window of reading scan line enable signal definition and the synoptic diagram that image signal has mistiming Tf.Figure 13 is the process flow diagram of vertical picture position method of adjustment for this reason.Step S401, definition one effective picture element is counted critical value, and when the effective picture element number in the one scan line was counted critical value greater than described effective picture element, then described sweep trace was an effective scanning line.Step S402, the starting point of the effective scanning line of detecting image signal, for example the rising edge with vertical synchronizing signal is a benchmark, and then the starting point of image signal effective scanning line is Te among Figure 12, and the purpose of this step is the starting point at the vertical image of detecting.Step S403, the difference value of the starting point Te of the effective scanning line of calculating image signal and the starting point Tc of sweep trace enable signal, defining its difference value is Tf, Tf=Te-Tc then, difference value Tf size is the degree of vertical picture skew, when difference value Tf greater than zero the time, representative picture downward bias, and when difference value Tf less than zero the time, representative picture is upwards partially.Step S404 utilizes described difference value Tf to adjust vertical synchronizing signal and sweep trace enable signal, makes the starting point of the upper limb aligned perpendicular image signal of vertical display window, allows image signal be presented in the middle of the picture.
Rely on the above-mentioned method that proposes, can judge the degree and the direction of picture skew, and then generation picture position compensation signal, with the situation of compensation picture skew, method proposed by the invention can solve between image signal and data enable signal/sweep trace enable signal up hill and dale has the picture shift phenomenon that the mistiming produces.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. display menu location regulation method is presented at position on the display in order to adjust a picture signal, it is characterized in that its step comprises:
Define a noise margin value, value is a valid pixel greater than the pixel of described noise margin value;
Detect the starting point of the valid pixel of described picture signal;
Calculate the difference of the starting point of the starting point of valid pixel of described picture signal and a data enable signal, obtain one first difference value; And
Utilize described first difference value to adjust a horizontal-drive signal and described data enable signal, the starting point that makes the leftmost edge of the horizontal display window of described display aim at the valid pixel of described picture signal.
2. display menu location regulation method as claimed in claim 1 is characterized in that, the step of starting point of detecting the valid pixel of described picture signal is that the rising edge with described horizontal-drive signal is a reference data.
3. display menu location regulation method as claimed in claim 1 is characterized in that, also comprises step:
Define a valid pixel and count critical value, when the valid pixel number in the one scan line was counted critical value greater than described valid pixel, then described sweep trace was an effective scanning line;
Detect the starting point of the effective scanning line of described picture signal;
Calculate the difference of the starting point of the starting point of effective scanning line of described picture signal and one scan line enable signal, obtain one second difference value; And
Utilize described second difference value to adjust a vertical synchronizing signal and described sweep trace enable signal, the starting point that makes the upper limb of the vertical display window of described display aim at the effective scanning line of described picture signal.
4. display menu location regulation method as claimed in claim 3 is characterized in that, the step of starting point of detecting the effective scanning line of described picture signal is that the rising edge with described vertical synchronizing signal is a reference data.
5. display menu location regulation method as claimed in claim 1 is characterized in that, when the step of the valid pixel of judging described picture signal, reduces the yield value of described picture signal in an analog-digital converter.
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| CN2010102172004A CN101887711B (en) | 2006-11-28 | 2006-11-28 | Regulation method of display picture position |
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| CN2010102172004A CN101887711B (en) | 2006-11-28 | 2006-11-28 | Regulation method of display picture position |
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| CN2006101448839A Division CN101192396B (en) | 2006-11-28 | 2006-11-28 | Display menu location regulation method |
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| CN101887711B true CN101887711B (en) | 2011-10-19 |
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| CN104202551A (en) * | 2014-08-26 | 2014-12-10 | 中安消技术有限公司 | Method and device for video data acquisition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160262A (en) * | 1995-11-06 | 1997-09-24 | 索尼公司 | Video display apparatus having on-screen display and method for controlling position thereof |
| US6271888B1 (en) * | 1997-08-27 | 2001-08-07 | Deutschethomson-Brandt Gmbh | Method for obtaining line synchronization information items from a video signal, and apparatus for carrying out the method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160262A (en) * | 1995-11-06 | 1997-09-24 | 索尼公司 | Video display apparatus having on-screen display and method for controlling position thereof |
| US6271888B1 (en) * | 1997-08-27 | 2001-08-07 | Deutschethomson-Brandt Gmbh | Method for obtaining line synchronization information items from a video signal, and apparatus for carrying out the method |
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Effective date of registration: 20200410 Address after: No.1, Duhang 1st Road, Hsinchu City, Hsinchu Science Park, Taiwan, China Patentee after: MEDIATEK Inc. Address before: Hsinchu County, Taiwan, China Patentee before: MSTAR SEMICONDUCTOR Inc. |
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Granted publication date: 20111019 Termination date: 20211128 |