CN1244859C - Method for automatically regulating image display quality - Google Patents
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Abstract
The present invention relates to a method for automatically regulating image display quality to adjust a visualization result of a display. The method comprises the following procedures: according to the input image data, the phase is automatically adjusted to obtain phase data. A display format of the phase data is compared with a prestored system format; when the two formats are matched, the phase data is stored; if the two formats are not matched, the phase data leaves. The horizontal resolution of the image data is compared with the prestored system horizontal resolution; when the two system resolutions are not matched, the horizontal resolution of the image data leave, if the two resolutions are matched, a horizontal position is adjusted automatically to obtain horizontal position data, and the horizontal position data is stored, and then leaves.
Description
Technical field
The present invention relates to a kind of method of adjusting image display quality, particularly a kind of can be automatically and the method for rapid adjustment display image display quality.
Background technology
Along with the progress of science and technology and the innovation of technology, the development of imaging technique is maked rapid progress especially, and is at a tremendous pace.With the display is example, and traditional cathode ray tube (CRT) display is because bulky and radiation is serious, and the market of the high-order display that fades out gradually in recent years replaces, and is low radiation, low power consumption and compact LCD (LCD).Because LCD has above-mentioned advantage, so become the main flow machine in high-order market already, becomes the synonym of high-order display.Present mobile computer, single rifle projector all is to use LCD, even the user of more and more desktop PCs also selects LCD to replace traditional cathode ray tube screen.
The screen of display is made up of bright spot one by one, and these bright spots are called pixel.Pixel is the most basic unit of screen, by in the pixel data of input display to the ratio of Red signal that should pixel, the color and the brightness that decide this pixel to show.Whole screen-picture is made up of the pixel of each different colours and brightness, and the number of whole screen bright spot is many more, represents that the shared area of each bright spot is more little, and the picture that presents is just careful more.Generally our number of pixels that is multiplied by each row (column) of screen vertical direction with the number of pixels of each row of screen level direction (row) is represented the resolution (resolution) of an indicator screen, the just careful degree of display institute energy picture displayed.For example: resolution is 1024 * 768 display, represent this display the screen level direction each show 1024 pixels, each row of vertical direction has 768 pixels, and whole screen always has 1024 * 768 pixels.
The picture data of input display can be divided into pixel data and display format two parts.Pixel data is the ratio of the Red signal that each pixel shows on the screen, with color and the brightness that determines that each pixel is shown.Except pixel data, picture data also comprises one group of display format (timing), and three parameters are arranged in this group display format, is respectively horizontal-drive signal Hs, vertical synchronizing signal Vs and pixel clock (pixel clock) CK.The unit of these three parameters all is a frequency, but pixel clock CK is the pixel count of per second Show Color, determines certain pixel Show Color to the next pixel Show Color length of interval time.When the pairing pixel of pixel data of input was the pixel of this row last column, the pixel basis pixel data of being gone by horizontal-drive signal Hs control wraparound next column first came Show Color.So horizontal-drive signal Hs can determine the pixel columns of per second Show Color.When the pairing pixel of pixel data of input is the pixel of last row last column of screen, is listed as first pixel basis pixel data by first of vertical synchronizing signal Vs control wraparound screen and comes Show Color.So vertical synchronizing signal Vs can determine per second picture displayed number.
When the picture data input display, display is just begun by the pixel of upper left side first row, first row, according in the picture data of being imported to pixel data Show Color that should pixel, be the pixel of first row, second row afterwards in regular turn, the pixel of first row the third line, after the pairing pixel data Show Color of the pixel basis of first row last column, the pixel Show Color of wraparound secondary series first row again, it then is the pixel of secondary series second row,, the pixel Show Color of a row last column to the last by that analogy.So the color that each pixel is shown is pieced together and is promptly formed picture to display.And when another picture data input display, then the pixel of being gone by upper left side first row first again begins, and determines each pixel color to display according to identical order, pieces together out another picture thus.
Because people's eyes have the phenomenon of persistence of vision, so if the renewal speed of display picture arrives certain degree greatly, then the picture of fast updating is not the picture that flashes fast one by one just by the human eye finding, but continuous dynamic picture composition, just film.The speed that different pictures is changed on indicator screen is called renewal frequency (refresh rate), the just frequency of vertical synchronizing signal.The frame updating frequency of at present general main frame is more than the 60Hz, and promptly indicator screen can show 60 picture datas in one second at least.
In the prior art, for the picture data of low resolution is shown in screen.Because the shown picture of LCD is all the full frame picture of full screen usually, but the resolution format of the picture data of input display all the resolution with indicator screen is identical.So display can receive the picture data of different resolution form, and carry out after the calculation process full frame picture at the screen display full screen by the micro-control unit (MCU) of display itself.For instance, if the resolution format of picture data 100 is 800 * 600, and the resolution of indicator screen is 1024 * 768, because the number of pixels of picture data 100 is less than the displayable pixel number of indicator screen, must be filled in picture whole screen if picture data 100 is directly presented this moment.Therefore, show, just must the pixel count of picture data 100 be extended to 1024 * 768 by algorithm if picture data 100 will be made full screen; The algorithm that can reach this purpose has many kinds, and interpolation method is one of practice commonly used.When making interpolation method, can earlier the pixel Pn of first row, first row in the picture data 100 be presented at the Pm place, position of first row, first row of indicator screen, then in regular turn with the pixel of picture data 100 and the computing of mat interpolation method and pixel show, can form 1024 * 768 picture data 102, screen is filled up.
When the user uses LCD, may occur that picture flashes, image quality is unintelligible or the picture skew is not presented at the middle position of screen ... etc. problem, make that display output picture quality is not good.Can carry out suitable adjustment this moment to improve the quality of picture.The quality of general display output picture can be adjusted by following four parameters, be respectively: horizontal level (H-pos) adjustment, upright position (V-pos) adjustment, phase place adjustment and pixel clock adjustment ... Deng the adjustment mode, to reach the purpose that makes picture quality stable, because general display card is when dispatching from the factory, its pixel clock and upright position are very correct usually, pretending pixel clock adjustment and upright position adjusts the effect of picture quality improvement limited, horizontal level and phase place then have confidential relation with picture quality, need accurately to adjust.Hereinafter, will be illustrated at traditional automatic adjusting method.
When the user thought that the picture quality of display is not good, the user can utilize the automatic adjustment button on indicator screen next door, carries out the automatic adjustment of image quality.The signal that this moment, the automatic regulating apparatus in the display just can capture the input picture data is made horizontal position adjustment, upright position adjustment, phase place adjustment and pixel clock respectively and is adjusted the quality that picture is adjusted in these four actions.The automatic regulating apparatus of some display is by software control, and when picture data feed-in display, this automatic regulating apparatus can be done to adjust automatically according to the signal of input picture data automatically, to improve the quality of display picture.
The problem that the quality of using classic method to adjust picture can take place is, for most of users, owing to be unfamiliar with operation of LCD, so when seeing the display picture bad, as long as and unclearly press the quality that automatic adjustment button just can be adjusted picture.The user can take for and buy faulty materials and seek help from the attendant who produces or sell the company of this display, even requires to return goods to company.Though the explanation by the attendant gets final product head it off, can cause user and the production of buying display or sell the associate's of display puzzlement and waste of time.
In addition, when display is carried out self-adjusting action with classic method, all intactly executive level position adjustment, upright position adjustment, phase place adjustment and pixel clock are adjusted four actions, make the self-adjusting time become very long, carry out once adjustment automatically and approximately need spend about seven seconds.When doing self-adjusting action, do not need to adjust whole parameters usually, actual as long as the adjustment member parameter can make display frame reach desired quality.In the display format of the picture data of at present general display card input display, usually the parameter that least needs to adjust is a pixel clock, but when carrying out adjustment automatically according to classic method, the adjustment pixel clock but can be used up the time at most, approximately needs about three seconds.And the parameter of doing to need most when adjusting automatically adjustment is a phase place, and making phase place, to adjust the required time very short.If when doing self-adjusting action, the display format of input picture data changes, and this moment is because the restriction of time, makes self-adjusting action not finish and does not carry out the adjustment of phase place, then causes phase place incorrect, film flicker.Do not reach the effect of adjusting picture quality.
Moreover, when adjusting automatically traditionally, will inevitably carry out horizontal position adjustment at picture data; So-called horizontal position adjustment, promptly above move the pixel of first row, first row in the picture data to step that the screen upper left corner shows, if the resolution of picture data is the resolution that can full screen shows, then horizontal position adjustment can reach the purpose that full screen shows, does not have query; Otherwise, if the non-special resolution that shows for full screen of the resolution of picture data 104, for example 950 * 700, display frame is offset, can't be shown in center Screen.So, not only the full frame picture of seeing with user's custom is not inconsistent the inconvenience the when skew of picture also can cause the user to use.
In addition, the automatic regulating apparatus of some display is by software control, can do to adjust automatically according to the data of the display format group of importing picture data.After automatic adjustment, the parameter of this picture quality just can store.But traditional automatic regulating apparatus can only be stored the parameter of a group of pictures quality.Because every display card display format parameter might not be identical, so in case the user uses different signal sources, for example: when main frame that more renews or new display card, if the display format parameter of the display format parameter of new signal source and original storage is not simultaneously, the picture quality that display presented equally can variation.
By above narrating as can be known, traditional picture automated process has following shortcoming at least:
One, causes user and attendant's puzzlement and waste of time easily.
Two, it is oversize to adjust required time automatically, and time waste on the pixel clock that not too needs to adjust and not carry out and need most the phase place adjustment of doing, cause film flicker.Do not reach the effect of automatic adjustment picture quality.
Three, if the used display format of user is not the standard form in the storer, then picture can be offset to the upper left corner, causes user's inconvenience.
Four, when signal source that the user more renews, if display format and original display format are not simultaneously, picture quality is understood variation.
Summary of the invention
In view of this, purpose of the present invention is exactly in the method that a kind of automatic adjustment image display quality is provided.Can reach following purpose:
One. do not need user's manual adjustment, can adjust picture quality automatically.
Two. can save the required time of automatic adjustment.
Three. if display format is the standard form that is pre-stored in the storer, then picture is shown in the central authorities of screen.
Four. can repeatedly carry out automatic adjustment, to determine preferable picture quality.
According to the foregoing invention purpose, the present invention proposes a kind of method of automatic adjustment image display quality, to do the image adjustment at display with automatic regulating apparatus, the method that should adjust image display quality automatically comprises the steps: at first, one picture data is provided, wherein this picture data has a display format, and this display format has a display resolution; Picture data according to input is done the automatic phase adjustment, to get a phase data.Then this display format and a plurality of standard forms that prestore are compared, then store this phase data when form conforms to, then do not leave when form is inconsistent, wherein, each standard form respectively has a standard resolution; And with the horizontal resolution of this picture data and the standard resolution comparison that prestores, if then do not leave when horizontal resolution and standard resolution are inconsistent, then carry out if conform to the automatic horizontal position adjust with a horizontal location data, and will leave after this horizontal location data storage.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below.
Synoptic diagram when the picture data that Figure 1A illustrates low resolution is shown in screen.
It is synoptic diagram when the picture data of low resolution fills up screen among Figure 1A that Figure 1B illustrates.
Synoptic diagram when Fig. 1 C illustrates picture data skew center Screen.
Fig. 2 illustrates a kind of automatic regulating apparatus calcspar of display.
Fig. 3 A illustrates a kind of synoptic diagram that locks the method for simulating signal.
Fig. 3 B illustrates the synoptic diagram of the method for another kind of locking simulating signal.
Fig. 3 C illustrates the synoptic diagram by two kinds of locking signal gained phase data.
Embodiment
Tradition influences in horizontal level, upright position, phase place and four parameters of pixel clock of picture quality.Usually pixel clock and upright position are all very accurate, are not unlikely to that also picture quality is had too much influence even do not adjust.To picture quality influence bigger be horizontal level and phase place, adjust horizontal level and can make picture be presented at the central authorities of indicator screen, adjust phase place and then can make picture more clear and can not flash.So the method for the automatic adjustment picture quality that the present invention is carried only adjusts at the horizontal level of phase place and picture.So, the time of required cost when adjusting automatically, the self-adjusting action of execution that can be very fast when picture data is imported are carried out in saving that can be a large amount of.Avoid making self-adjusting action lose effect because of the quick change of picture data form of input.
With reference to Fig. 2, it illustrates is the automatic regulating apparatus calcspar of a display.Automatic regulating apparatus 200 comprises pre-amplifier 202, phase-locked loop (PLL) 204, analog-digital converter (ADC) 206, ratio processor (scaler) 208 and micro-control unit (MCU) 210, each interelement relation of coupling is as illustrating among the figure, do not repeat them here, to be example hereinafter, the method for automatic adjustment image display quality of the present invention will be described with the structure of automatic regulating apparatus 200.
As everyone knows, display frame is made of red (R), green (G), blue (B) three primary colors, and the pixel data P1 in the picture data, is the simulating signal of the trichromatic ratio of RGB.Generally speaking, the voltage rating of input signal is that 0.7 volt of peak is to peak value (Vpp), if input signal is not that the peak is to 0.7 volt of peak value, then can be by the effect of pre-amplifier 202, with pixel data be adjusted into 0.7 volt of peak to peak value after, in the feed-in analog-digital converter 206, to carry out analog/digital conversion.
On the other hand, after phase-locked loop 204 receives horizontal-drive signal Hs, can pin the frequency of horizontal-drive signal Hs earlier, be benchmark with horizontal-drive signal Hs again, produces the identical locking signal LH with input pixel clock CK.Afterwards, in this locking signal LH feed-in analog-digital converter 206, to carry out analog/digital conversion at pixel data P1.When carrying out analog/digital conversion, analog-digital converter 206 can be according to locking signal LH acquisition through pre-amplifier 202 adjusted pixel data P1, use that simulating signal is changed into digital signal, and send in the ratio processor 208, to carry out the adjustment work of picture data.
Display format with the XGA specification is an example, and the display resolution of picture data should be 1024 * 768, and horizontal-drive signal Hs is 48.36KHz, and vertical synchronizing signal Vs is 60Hz, and pixel clock CK then is 65MHz.After phase-locked loop 204 receives the horizontal-drive signal Hs of 48.36KHz, can produce the locking signal LH of 65MHz according to this, because the frequency of locking signal LH is identical with pixel clock CK, therefore analog-digital converter 206 can accurately be read the data of each pixel when utilizing locking signal LH acquisition pixel data P1.
When the adjustment work of carrying out picture data, micro-control unit 210 can receive the display format of picture data, and adjust phase-locked loop 204 according to the operation result of 208 pairs of picture datas of ratio processor, to make the phase deviation of locking signal LH, so, can change the sampled position of each pixel, and then adjust the degree of stability of sampling result.So by the running of these back coupling systems, can make display reach optimal display result as can be known, this step is the automatic phase adjustment, and its principle of operation then waits until hereinafter describing in detail.
With reference to Fig. 3 A, it illustrates is a kind of synoptic diagram that locks the method for simulating signal.As indicated above, when analog-digital converter 206 receives the pixel data P1 that pre-amplifiers 202 are imported, because of pixel data P1 is a simulating signal, so during the execution analog/digital conversion, just must in regular turn the value of each pixel be captured out by locking signal LH, this step also be referred to as sampling.In practice is used, be that the synchronous signal of employing and pixel data P1 is as locking signal LH, in order to pixel data P1 is taken a sample.With this figure is example, the mode that we can utilize negative edge to trigger (negative-edged trigger) captures the numerical value of pixel data P1, so, the data-signal that can obtain dispersing, again that this is discrete data-signal value converts to digital mode to be represented, can be digital signal with analog signal conversion.It should be noted that phase-locked loop 204 except determining the sampling frequency of simulating signal, also determined the position of sampling action on the contiguous pixels data-signal of fixed cycle.If the position of each sampling action is as shown in Figure 3A, because the signal stabilization of the pixel data of this sample position, can be more clear by the picture that sampling result is formed, picture is also comparatively stable, is difficult for flicker.
On the other hand,, just can have a strong impact on the degree of stability of sampling result, picture quality is reduced if the sample position of locking signal is not good enough.Then with reference to Fig. 3 B, it illustrates the method synoptic diagram of another kind of locking simulating signal.As shown in the figure, the negative edge of locking signal LH ' just drops near the state exchange place of pixel data P1, and so, the pixel data P1 that locking signal LH ' locked onto is just stable inadequately, makes film flicker.If locking signal LH is compared with locking signal LH ', i.e. this two phase place difference as can be known, that is differed phase place between two locking signals, shown in Fig. 3 C.So micro-control unit 210 is when adjusting phase-locked loop 204, promptly the phase place at locking signal is adjusted, so that the pixel data that locking signal captured is the value under the steady state (SS), so can obtain optimized display effect; After the phase place adjustment finishes, last phase data can be noted, can continue to continue to use the phase data last time adjusted when starting shooting next time, makes picture maintain optimized state.
It should be noted that automatic regulating apparatus will do once to adjust automatically the action of picture quality again when new display format input is arranged at every turn.In addition, if the user connects different signal sources with display, for example: different main frames or different display cards just the display format of input display can change to some extent at this moment, need to do to adjust to obtain preferable display result automatically.Characteristic of the present invention promptly is to have the function of repeatedly adjusting, and can adjust the action of picture quality along with the change of input picture data form automatically, and the result is stored in the programmable read only memory of electrically can erasing.
General user is accustomed to the full frame picture of the screen display full screen of display.If can not be adjusted to full frame picture, also wish picture to be presented at the middle position of screen, use to make things convenient for the user.So, except doing the automatic phase adjustment, also must do the adjustment of automatic horizontal position in order to keep the quality of picture.Display manufacturer can be pre-stored in several groups of display formats of using always in the storer of micro-control unit 210.The storer that meets function required for the present invention is of a great variety, for example: electrically erasable programmable ROM (EEPROM) and flash read only memory (Flash ROM) ... or the like.If the horizontal resolution form of input picture data conforms to the display format that is pre-stored in storer, then adjust the horizontal level of this picture data, make picture be presented at the center Screen position.And if the resolution format of input picture data does not conform to the standard resolution format that is pre-stored in storer, then do not make horizontal position adjustment.Hereinafter, will be illustrated at the method for adjustment of horizontal level.When judging whether to carry out horizontal position adjustment, micro-control unit 210 can read the display format of the picture data of ratio processor 208 computing gained, and with it with micro-control unit 210 in electrically erasable programmable ROM in the standard form that prestores compare, whether conform to, whether carry out the adjustment of automatic horizontal position with decision with a certain standard form wherein.If do not conform to, then jump out automatic regulating apparatus 200, do not carry out the adjustment of automatic horizontal position.Otherwise, if a certain standard form that prestores in display format and the storer conforms to, then this moment, micro-control unit 210 can calculate the horizontal level of importing picture data according to the value that ratio processor 208 is read, micro-control unit 210 executive level position is again adjusted, the pixel data of first row in the whole image pixel data is presented on the first row pixel of indicator screen, to obtain best demonstration.For example: if the resolution format of the picture data of input is 800 * 600, and the resolution of indicator screen is 1024 * 768.This moment, micro-control unit 210 can calculate the display resolution of input picture data according to the value that ratio processor 208 is read, and the standard horizontal resolution that prestores in itself and the storer compared, learn that the horizontal resolution form in 800 * 600 is one of standard form that prestores in the storer.Micro-control unit 210 can obtain a horizontal location data according to result of calculation, and according to this horizontal location data resize ratio processor 208, the pixel data of first row in the whole image pixel data can be presented on the first row pixel of indicator screen, is to be the adjustment of automatic horizontal position.
The method of the disclosed a kind of automatic adjustment display picture quality of the above embodiment of the present invention can reach following effect:
One. can automatically adjust picture quality, not need the user manually to adjust, to reduce user and life Produce or sell the associate's of this display puzzlement and waste of time.
Two. can save the self-adjusting time, avoid because the quick change of picture data form so that from Moving adjustment action loses due effect.
Three. can repeatedly adjust picture quality, avoid when the user changes different signal sources, producing picture The problem of face bad.
Four. if display format is the standard horizontal resolution form that is pre-stored in the memory, and is then that picture is aobvious Be shown in the central authorities of screen.
In sum, although the present invention discloses as above with a preferred embodiment, so it is not in order to limit Decide the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention, when Can do various changes and retouching, so protection scope of the present invention should be defined with the claim scope Be as the criterion.
Claims (8)
1. method of automatically adjusting image display quality, in order to adjust the video picture result of a display, this method of adjusting image display quality automatically may further comprise the steps:
One picture data is provided, and wherein, this picture data has a display format, and this display format has a display resolution;
Do the automatic phase adjustment according to this picture data, to get a phase data;
Compare with this display format and a plurality of standard forms that prestore, then store this phase data when form conforms to, then do not leave when form is inconsistent, wherein, each described standard form respectively has a standard resolution; And
Compare with this display resolution and the standard resolution that prestores, when being inconsistent, this display resolution and this standard resolution then do not leave, when this display resolution conforms to this standard resolution, Fang Zhihang automatic horizontal position adjust with a horizontal location data, and will leave after this horizontal location data storage.
2. the method for automatic adjustment image display quality as claimed in claim 1, wherein this display is a LCD.
3. the method for automatic adjustment image display quality as claimed in claim 1, wherein this display is a projector.
4. the method for automatic adjustment image display quality as claimed in claim 1, this method can repeat to implement, and image display quality is repeatedly adjusted.
5. the method for automatic adjustment image display quality as claimed in claim 1, wherein this display resolution is 1024 * 768.
6. the method for automatic adjustment image display quality as claimed in claim 1, wherein those standard forms are to be stored in the storer of this display.
7. the method for automatic adjustment image display quality as claimed in claim 6, wherein this storer is a flash read only memory.
8. the method for automatic adjustment image display quality as claimed in claim 6, wherein this storer is an electrically erasable programmable ROM.
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| CN 01103345 CN1244859C (en) | 2001-02-01 | 2001-02-01 | Method for automatically regulating image display quality |
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| CN 01103345 CN1244859C (en) | 2001-02-01 | 2001-02-01 | Method for automatically regulating image display quality |
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| CN1294479C (en) * | 2004-03-25 | 2007-01-10 | 四川长虹电器股份有限公司 | Auto recognition method of simulating video signal mode |
| CN100390725C (en) * | 2005-08-23 | 2008-05-28 | 明基电通股份有限公司 | Method and system for information signal display and media for storing program for implementing such method |
| KR101206418B1 (en) | 2005-11-03 | 2012-11-29 | 삼성전자주식회사 | Monit0r and display mode auto adjustment mathod |
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| CX01 | Expiry of patent term |
Granted publication date: 20060308 |
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| CX01 | Expiry of patent term |