CN101661737A - Method for switching between wide screen and general screen of liquid crystal display - Google Patents
Method for switching between wide screen and general screen of liquid crystal display Download PDFInfo
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- CN101661737A CN101661737A CN200910194519A CN200910194519A CN101661737A CN 101661737 A CN101661737 A CN 101661737A CN 200910194519 A CN200910194519 A CN 200910194519A CN 200910194519 A CN200910194519 A CN 200910194519A CN 101661737 A CN101661737 A CN 101661737A
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Abstract
The invention discloses a method for switching between a wide screen and a general screen of a liquid crystal display, which belongs to the technical field of image display. The method comprises the following steps: (1) converting an input image signal into a digital image signal by the liquid crystal display; (2) determining the vertical resolution and the horizontal resolution of a display screen according to a display proportion selected by a user; (3) keeping the vertical pixels of digital images unchanged and scaling the horizontal pixels of the digital images according to the obtained horizontal resolution; and (4) displaying the scaled digital images and outputting. Compared with the prior art, the invention can be used for switching between various display proportions and has strong adaptability; simultaneously, the invention simplifies the production process of a product, lowers the production cost and is more convenient for the upgrade and the maintenance of the product; andin addition, the method fills a technical blank of switching between the wide screen and the general screen of the liquid crystal display of a computer and has extensive market prospect.
Description
Technical field
The present invention relates to a kind of image processing method, relate in particular to the changing method between a kind of LCD widescreen and the general screen, belong to the image display technology field.
Background technology
In recent years, widescreen (present displaying ratio mainly contained 16: 9 and 16: 10) LCD is popular gradually, and price is accepted by the consumer gradually; General screen (main displaying ratio has 4: 3 and 5: 4 at present) the shared ratio of LCD slowly reduces, and price is but more and more higher, until last stopping production.
Yet, though the LCD industry is making the transition to widescreen at present, but the consumer is because of visual custom, and same content display effect under widescreen can become short, so the consumer is buying the displaying ratio effect of sometimes still wishing to obtain general screen behind the widescreen display.Current LCD supplier also provides switching between widescreen and the general screen satisfying consumer's different demands, but present handoff technique mainly concentrates on the LCD TV, and the technical method that adopts mainly is to realize conversion by hardware, can take the photograph at 4: 3 form CRT negative electrodes such as domestic certain famous TV production firm and to show 16: 9 forms on the spool back projection television, realize the switching between widescreen and the general screen, it is based on the hardware circuit realization, it comprises field-scanning circuit and primary colour signal amplifier, a signal recognition circuit and a width of cloth control circuit.Signal recognition circuit is connected with input signal, and according to input signal format output control signal, a width of cloth control circuit is connected with field-scanning circuit, the control signal of a width of cloth control circuit received signal identification circuit output, the sweep amplitude of controlling filed sweep circuit.
Yet never be resolved based on the changing method of computer LCD between widescreen and general screen at present, and, because data and LCD TV when the computer LCD is handled widescreen and switched with general screen in of living in are different, so can not simply directly apply mechanically the changing method between LCD TV widescreen and the general screen; Simultaneously at present changing method relates to a lot of hardware circuits between the widescreen of LCD TV and the general screen, has promptly increased production cost, has wasted resource, makes the production procedure complexity again, and sport technique segment increases, and will produce certain influence to the maintenance in later stage.
Summary of the invention
The object of the present invention is to provide the changing method between a kind of LCD widescreen and the general screen, it is by to wanting video data to handle, the Digital Image Data that will show is being kept under the constant situation of vertical pixel, horizontal pixel to digital picture compresses, obtain general screen scaled image, output on the display.Image beyond the general screen ratio in compression back shows in the black level mode, thereby reaches the switching between widescreen and the general screen, when showing the content of general screen on need the LCD in widescreen, does not cause the display effect change short.
Technical scheme of the present invention is:
Changing method between a kind of LCD widescreen and the general screen the steps include:
1) LCD is converted to data image signal with the picture signal of input;
2) displaying ratio of selecting according to the user is determined the vertical resolution and the horizontal resolution of display screen;
3) keep the digital picture vertical pixel constant, the horizontal pixel of digital picture is carried out convergent-divergent according to the horizontal resolution that obtains;
4) digital picture behind the convergent-divergent is shown output.
In the described method, if the digital picture of exporting behind the convergent-divergent less than LCD, the LCD zone beyond the then described digital picture adopts the black level mode to show.
In the described method, reference position and the end position that scaler shows is set, with digital picture demonstration output placed in the middle on LCD of described output according to the digital picture behind the convergent-divergent.
In the described method, the method of determining display screen vertical resolution and horizontal resolution is: the vertical resolution that at first will import ratio is set at the maximum perpendicular resolution of display, then the horizontal resolution of input is made the equal proportion convergent-divergent, obtain the horizontal resolution behind the convergent-divergent.
The displaying ratio that described user selects comprises the general screen, 16: 9 of 4: 3 or 5: 4 or 16: 10 widescreen.
If the picture signal of described input is an analog picture signal, then utilize AD conversion unit to be converted into data image signal.
Good effect of the present invention is:
The present invention has realized the effect of widescreen to general screen conversion by data to be displayed is carried out pre-service, and can be used for the switching between the various displaying ratios, and adaptability is strong.Method of the present invention has not only been simplified the production procedure of product, and has reduced production cost, make simultaneously product upgrading, safeguard more convenient; In addition, method of the present invention has been filled up the technological gap that switches between computer LCD widescreen and the general screen, has vast market prospect.
Description of drawings
Fig. 1, LCD fundamental diagram;
Fig. 2, scaler displaying ratio are provided with schematic diagram;
Fig. 3, widescreen of the present invention switch to the display effect behind the general screen;
Fig. 4, method flow diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
At present, the host computer output signal is for meeting the signal of VESA (VESA:Video Electronics StandardsAssociation) standard, latest edition is VESA and Industry Standards and Guidelines forComputer Display Monitor Timing (DMT) Version 1.0, Rev.12November 17,2008.
LCD inter-process system mainly is an analog to digital converter, and be made up of two parts: MCU (microcontroller unit) micro-control unit and Scaler scaler, wherein the Scaler scaler is responsible for the convergent-divergent work of data.
During LCD work, AD conversion unit is changed host computer display card signal, becomes digital signal as the analog signal conversion by the input of computer display card; Be input to liquid crystal display by LVDS (Low Voltage Differential Signaling) low-voltage differential signal passage, get final product correct display image, as shown in Figure 1.
The inventive method flow process adopts LCD OSD menu item to control the switching of widescreen and general screen as shown in Figure 4.
Scaler in the AD conversion unit is a scaler, has the zoomed image function.Do not carrying out the liquid crystal display displaying ratio when being provided with, the display resolution of liquid crystal display has muchly usually, and the resolution signal that scaler just imports the main frame display card is scaled to the ultimate resolution of liquid crystal display.
Because decision image size factor is vertical resolution, so according to screen vertical resolution size (the screen vertical resolution in the present embodiment adopts 9 unit representations) can calculated level resolution what, concrete account form is: horizontal resolution is 16 units in the present embodiment, the maximum perpendicular resolution of display is 9 units, since when the widescreen of 16: 9 ratios converts the general screen of 4: 3 ratios to vertical resolution constant still be 9 units, the horizontal resolution that then becomes behind 4: 3 the general screen is 4 ÷ of unit, 3 units * 9 units=12 units; According to the horizontal resolution after calculating pixel is carried out convergent-divergent then, again this horizontal pixel point is presented at center Screen between two parties, and both sides (unit of 16 units-12=4 units) averages filling (every limit is 4 ÷ 2=2 units of unit) with black, if the liquid crystal display display requirement is 4: 3 a resolution, horizontal resolution is exactly 12 units, if the liquid crystal display display requirement is 16: 9 a resolution, horizontal resolution is exactly 16 units.
The liquid crystal display display requirement was being switched at 4: 3 o'clock from 16: 9, the present invention is the image that obtains 4: 3 ratios after under the situation about highly remaining unchanged the pixel of image level direction being carried out a compression algorithm (but concrete compression method application reference number: 200710172931, the patented claim of denomination of invention " non-linear image zooming method and system "), on display, show then, after the compression, 4: 3 ratios image in addition shows in the black level mode, and promptly image is shown as black.In the practical application, scaler is provided with the reference position and the end position of demonstration, and as shown in Figure 2, Fig. 2 is provided with schematic diagram for the scaler displaying ratio.Widescreen switch to behind the general screen display effect as shown in Figure 3, wherein white portion is 4: 3 general screens after switching among the figure, entire image is 16: 9 a widescreen.
The present invention is suitable equally for the switching between other displaying ratio of LCD.
Claims (6)
1. the changing method between a LCD widescreen and the general screen the steps include:
1) LCD is converted to data image signal with the picture signal of input;
2) displaying ratio of selecting according to the user is determined the vertical resolution and the horizontal resolution of display screen;
3) keep the digital picture vertical pixel constant, the horizontal pixel of digital picture is carried out convergent-divergent according to the horizontal resolution that obtains;
4) digital picture behind the convergent-divergent is shown output.
2. the method for claim 1, it is characterized in that if the digital picture of exporting behind the convergent-divergent less than LCD, the LCD zone beyond the then described digital picture adopts the black level mode to show.
3. method as claimed in claim 2 is characterized in that according to the digital picture behind the convergent-divergent reference position and the end position that scaler shows being set, with digital picture demonstration output placed in the middle on LCD of described output.
4. the method for claim 1 is characterized in that the method for determining display screen vertical resolution and horizontal resolution is:
The vertical resolution that at first will import ratio is set at the maximum perpendicular resolution of display, then the horizontal resolution of input is made the equal proportion convergent-divergent, obtains the horizontal resolution behind the convergent-divergent.
5. the method for claim 1 is characterized in that displaying ratio that described user selects comprises the general screen, 16: 9 of 4: 3 or 5: 4 or 16: 10 widescreen.
6. the method for claim 1 is characterized in that then utilizing AD conversion unit to be converted into data image signal if the picture signal of described input is an analog picture signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910194519A CN101661737A (en) | 2009-08-25 | 2009-08-25 | Method for switching between wide screen and general screen of liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910194519A CN101661737A (en) | 2009-08-25 | 2009-08-25 | Method for switching between wide screen and general screen of liquid crystal display |
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| CN101661737A true CN101661737A (en) | 2010-03-03 |
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| CN200910194519A Pending CN101661737A (en) | 2009-08-25 | 2009-08-25 | Method for switching between wide screen and general screen of liquid crystal display |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082951A (en) * | 2010-12-08 | 2011-06-01 | 广东威创视讯科技股份有限公司 | Transmission method and device and formatting method and device of image signals |
| CN103745709A (en) * | 2014-01-24 | 2014-04-23 | 福州瑞芯微电子有限公司 | Embedded self-adaptive screen displaying method |
| CN109410864A (en) * | 2018-12-04 | 2019-03-01 | 惠科股份有限公司 | Driving method and driving module of display panel and display device |
| CN112216248A (en) * | 2020-09-24 | 2021-01-12 | 北京德为智慧科技有限公司 | Control method for self-adaptive adjustment of resolution of display and display system |
-
2009
- 2009-08-25 CN CN200910194519A patent/CN101661737A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082951A (en) * | 2010-12-08 | 2011-06-01 | 广东威创视讯科技股份有限公司 | Transmission method and device and formatting method and device of image signals |
| CN103745709A (en) * | 2014-01-24 | 2014-04-23 | 福州瑞芯微电子有限公司 | Embedded self-adaptive screen displaying method |
| CN109410864A (en) * | 2018-12-04 | 2019-03-01 | 惠科股份有限公司 | Driving method and driving module of display panel and display device |
| CN112216248A (en) * | 2020-09-24 | 2021-01-12 | 北京德为智慧科技有限公司 | Control method for self-adaptive adjustment of resolution of display and display system |
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Owner name: ACER (SHANGHAI) CO., LTD. Free format text: FORMER OWNER: BEIDA FANGZHENG SCIENCE + TECHNOLOGY COMPUTER SYSTEM CO., LTD., SHANGHAI Effective date: 20101020 |
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Effective date of registration: 20101020 Address after: 3, No. 168 middle Tibet Road, No. 200001, Shanghai, Huangpu District Applicant after: Acer Computer (Shanghai) Co., Ltd. Address before: 200120, 36 building, International Building, 360 South Road, Pudong New Area, Pudong, Shanghai, Shanghai Applicant before: Beida Fangzheng Science & Technology Computer System Co., Ltd., Shanghai |
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Application publication date: 20100303 |