CN101916552A - Anti-peeping display method - Google Patents
Anti-peeping display method Download PDFInfo
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- CN101916552A CN101916552A CN 201010214939 CN201010214939A CN101916552A CN 101916552 A CN101916552 A CN 101916552A CN 201010214939 CN201010214939 CN 201010214939 CN 201010214939 A CN201010214939 A CN 201010214939A CN 101916552 A CN101916552 A CN 101916552A
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Abstract
The invention discloses an anti-peeping display method which comprises the steps of: displaying a single picture by using a plurality of continuously displayed subframes; and providing various different drive signals by using same gray level of pixels in the picture in a process of displaying the picture, wherein the drive signals express that the same gray level of pixels provide different pixel voltages when the subframes are displayed.
Description
Technical field
The invention relates to the display technique field, and particularly relevant for a kind of anti-peeping display method.
Background technology
At present, LCD because of have high image quality, volume is little, in light weight and advantage such as applied range is widely used in consumption electronic products such as mobile phone, mobile computer, desktop display and TV, and replaced traditional cathode ray tube (CRT) display gradually and become the main flow of display.
For example vertical orientation type (VA mode) LCD is because of having the characteristics of wide visual angle (wideviewing angle) for LCD, and when the user used individual display in public places, the private data in the display may be spied on by neighbor.Therefore in the prior art LCD that proposes tool embedded (In-cell) peep-proof function is arranged.Particularly, be to produce glitch to disturb correct signal in the prior art in the mode that increases the peep-proof sub-pixel, allow the user can see correct signal at positive visual angle, then can be subjected to signal in (visual angle also promptly tilts) with great visual angle and disturb and can't see correct signal.Yet therefore such peep-proof mode can sacrifice the brightness of display panel because must show undesired signal by increasing additional subpixels, also can sacrifice contrast.
Summary of the invention
The purpose of this invention is to provide a kind of anti-peeping display method, can realize that the peep-proof effect also can be improved the problem that influences display panel brightness and contrast that exists in the prior art with great visual angle.
A kind of anti-peeping display method that the embodiment of the invention proposes comprises step: utilize a plurality of sub-picture frame that shows continuously to show individual picture; And in the picture procedure for displaying, the pixel of same gray level provides multiple different drive signal in the picture.Wherein, the pixel of different driving signal representative same gray level when this a little picture frame shows provides different pixel voltages.
In one embodiment of this invention, above-mentioned drive signal comprises at least one pulsed drive signal.
In one embodiment of this invention, above-mentioned drive signal also comprises the continuous schedule drive signal.
In one embodiment of this invention, above-mentioned picture comprises picture background and image information, has same gray level in the picture background and adopts relevant with image information with a kind of pattern that pixel constituted of drive signal.
In one embodiment of this invention, above-mentioned picture comprises picture background and image information, has same gray level in the picture background and adopts the pattern that pixel constituted with a kind of drive signal not have relevant with image information.
A kind of anti-peeping display method that another embodiment of the present invention proposes is applicable to LCD; And the shown picture of LCD be suitable for the user with first visual angle but not second visual angle that is different from first visual angle watch.The anti-peeping display method of present embodiment comprises step: show that continuously a plurality of sub-picture frames are to show individual picture; And in the procedure for displaying of picture, the pixel voltage that each pixel is adopted when this a little picture frame shows in the modulation picture presents different GTG so that watch the pixel with same gray level to watch from second visual angle from first visual angle.
In one embodiment of this invention, the first above-mentioned visual angle is positive visual angle, and second visual angle is the inclination visual angle.
In one embodiment of this invention, in the procedure for displaying of picture, watch the pixel voltage the pixel with same gray level to change to small part from first visual angle.
In one embodiment of this invention, in the procedure for displaying of picture, watching the pixel voltage of the other parts the pixel with same gray level from first visual angle is constant.
The embodiment of the invention utilizes a plurality of continuous sub-picture frames to show individual picture and make the pixel with same gray level provide different drive signals in the picture procedure for displaying, so that the pixel voltage of the pixel of same gray level when this a little picture frame shows is by modulation, and then make these pixels when watching with great visual angle, present different GTG, reach peep-proof effect with great visual angle.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A and Figure 1B are respectively showing continuously and adopt continuous schedule drive signal and pulsed drive signal to drive that the GTG value is the light transmission features that pixel presented of L128 under the positive visual angle in four sub-picture frame SF1～SF4 processes;
The GTG value is the light transmission features that pixel presented of L192 to Fig. 2 under the positive visual angle for employing pulsed drive signal in four sub-picture frame SF1～SF4 processes of continuous demonstration drives;
Fig. 3 is the picture to display of the embodiment of the invention;
0 degree visual angle of adopting continuous schedule drive signal and pulsed drive signal to drive when Fig. 4 A and Fig. 4 B are respectively the picture background that shows picture shown in Figure 3 and getting and the emulation display result under the 45 degree visual angles;
0 degree visual angle of adopting continuous schedule drive signal and pulsed drive signal to drive when Fig. 4 C and Fig. 4 D are respectively the image information that shows picture shown in Figure 3 and getting and the emulation display result under the 45 degree visual angles;
45 another emulation display result of spending under the visual angles that Fig. 5 adopts continuous schedule drive signal and pulsed drive signal to drive when showing the picture background of picture shown in Figure 3 get.
Wherein, Reference numeral:
SF1～SF4: sub-picture frame
Embodiment
The embodiment of the invention will specify a kind of anti-peeping display method in conjunction with Fig. 1 to Fig. 5, and it can be realized with great visual angle peep-proof and can improve the problem that influences display panel brightness and contrast that exists in the prior art.The anti-peeping display method that the embodiment of the invention proposes mainly is to utilize LCD different characteristic of pixel transmittance (transmittance) under different visual angles.As everyone knows, for plane internal conversion LCD, its pixel transmittance and visual angle size are parabolic relation, that is 0 degree position, visual angle transmittance is the highest and the big more transmittance in visual angle is low more; Therefore, the anti-peeping display method that the embodiment of the invention proposes can be applicable to vertical alignment mode (VA mode) LCD, but the present invention is not as limit.
In embodiments of the present invention, it is to utilize the sub-picture frame of a plurality of continuous demonstrations to show individual picture, below will show individual picture as an example to utilize four sub-picture frames that show continuously, but the present invention is not as limit, those skilled in the art can be provided with the quantity of sub-picture frame according to the picture frame frequency (frame frequency) of LCD, for example working as the picture frame frequency is 240HZ, and the quantity that sub-picture frame can be set is four.
Referring to Figure 1A and Figure 1B, it is respectively out showing continuously and adopts continuous schedule drive signal and pulsed drive signal to drive that the GTG value is the light transmission features that pixel presented of L128 under the positive visual angle in four sub-picture frame SF1～SF4 processes.
Shown in Figure 1A, under the situation that adopts continuous schedule drive pixel, it is identical that the transmittance that pixel is presented in each sub-picture frame SF1～SF4 keeps, just the value of transmittance is different under positive visual angle and inclination visual angle, for example the transmittance under 0 degree visual angle and the 45 degree visual angles is about 0.227 and 0.131 respectively, correspondingly the final GTG value that presents under positive visual angle and inclination visual angle is also different, and for example 0 degree visual angle and the 45 final GTG values of spending under the visual angles are about L128 and L99 respectively.
At this, the transmittance that is presented among each sub-picture frame SF1～SF4 is identical, and representative offers pixel in each sub-picture frame SF1～SF4 procedure for displaying pixel voltage is identical, that is pixel voltage is constant.In addition, need to prove that positive visual angle and inclination visual angle can be thought an angular field of view usually, its value is not limited to be respectively 0 degree and 45 degree.
Shown in Figure 1B, adopting the pulsed drive signal to drive under the situation of pixel, pixel is different with the transmittance that is presented in sub-picture frame SF4 at sub-picture frame SF1～SF3, at this, the different representatives of transmittance that presented among sub-picture frame SF1～SF3 and the sub-picture frame SF4 offer the pixel voltage of pixel in sub-picture frame SF1～SF3 procedure for displaying different with the pixel voltage that offers pixel in sub-picture frame SF4 procedure for displaying, the pixel voltage that offers pixel when for example showing sub-picture frame SF4 offers the pixel voltage of pixel when showing sub-picture frame SF1～SF3, that is pixel voltage changes.In Figure 1B, the average transmittance under 0 degree visual angle and the 45 degree visual angles is about 0.229 and 0.073 respectively, and correspondingly the final GTG value (that is average GTG value) under 0 degree visual angle and the 45 degree visual angles is about L128 and L76 respectively.
Relatively Figure 1A can find with Figure 1B: when adopting different drive signals to drive positive visual angle to have the pixel of same gray level value, the final GTG value that presents is different under the inclination visual angle, GTG value when for example adopting the continuous schedule drive signal to drive is L99, and the GTG value when adopting the pulsed drive signal to drive then is L76.
Need to prove, only be for example shown in Figure 1A and Figure 1B, for the pixel of any GTG value under showing positive visual angle, the kenel that the designer can set the pulsed drive signal according to the pixel transmittance and the relation between the size of visual angle of LCD, for example show when the GTG value is the pixel of L192 under the positive visual angle, can adopt the kenel of pulsed drive signal shown in Figure 2, that is the pixel voltage that offers pixel when showing sub-picture frame SF2 offers the pixel voltage of pixel when showing sub-picture frame SF1 and offers the pixel voltage of pixel when showing sub-pixel SF3 and SF4.
Referring to Fig. 3, it is individual picture to display of the embodiment of the invention.Picture shown in Figure 3 comprises image information " AB " and grey screen background, and image information " AB " is positioned at picture background.At this, the GTG value supposition of each pixel under positive visual angle is all L128 in the picture background, the GTG value supposition of each pixel under positive visual angle is all L64 in the image information " A ", and the GTG value supposition of each pixel under positive visual angle is all L96 in the image information " B ".
Referring to Fig. 4 A and Fig. 4 B, its picture background that is respectively no image information adopts continuous schedule drive signal and two kinds of drive signals of pulsed drive signal to drive the 0 emulation display result of spending under visual angle and the 45 degree visual angles that show and get.Particularly, under 0 degree visual angle, shown in Fig. 4 A, the final GTG value that shows of each pixel is all identical in the picture background, that is L128.Yet, under 45 degree visual angles, shown in Fig. 4 B, demonstrate pattern " BA " in the picture background, at this, each pixel of forming pattern " BA " adopts the pulsed drive signal to drive, and its GTG value is L76; And each pixel except that the pixel of forming pattern " BA " adopts the continuous schedule drive signal to drive, and its GTG value is L99.Need to prove at this, picture background in the present embodiment is actually and does not comprise among Fig. 3 by the occupied part of image information " AB ", in order to make pattern " BA " be easy to identification and be convenient to purpose of description, just in Fig. 4 A and 4B, the occupied part of image information " AB " is presented, and get complete pattern " BA ".
Referring to Fig. 4 C and Fig. 4 D, it is respectively image information " A " and all adopts continuous schedule drive signal and two kinds of drive signals of pulsed drive signal to drive the 0 emulation display result of spending under visual angle and the 45 degree visual angles that show and get with " B ".Particularly, under 0 degree visual angle, shown in Fig. 4 C, the final GTG value that shows of each pixel is all identical in the image information " A ", that is L64; The final GTG value that shows of each pixel is all identical in the image information " B ", that is L96.Yet under 45 degree visual angles, shown in Fig. 4 D, each pixel of image information " A " bend filling part adopts the pulsed drive signal to drive, and its GTG value is L51; Each pixel of other filling part in the image information " A " except that the oblique line filling part adopts the continuous schedule drive signal to drive, and its GTG value is L73; Each pixel of image information " B " bend filling part adopts the pulsed drive signal to drive, and its GTG value is L61; Each pixel of other parts in the image information " B " except that the oblique line filling part adopts the continuous schedule drive signal to drive, and its GTG value is L87.
So far, in four sub-picture frames that show continuously, adopt a plurality of different drive signals to drive by each pixel that has same gray level under the positive visual angle to picture background in the picture and image information, the pixel voltage of each pixel of modulation in the picture procedure for displaying by this, make under the inclination visual angle and to disturb and can't see correct picture, reach peep-proof effect with great visual angle by the pattern in the picture background.
In addition, the pattern that under the inclination visual angle, shows in the picture background in the foregoing description relevant with image information (for example pattern " BA " is the mirror image of image information " AB "), the pattern that the right embodiment of the invention is not limited to show in the picture background under the visual angle is relevant with image information, it is irrelevant that it can not have image information yet, for example shown in Figure 5.Particularly, in Fig. 5, the pattern that picture background shows under the 45 degree visual angles comprises the Q-RING that a plurality of arrays are arranged, and itself and image information for example " AB " are irrelevant; In other words, when showing any picture, have the same gray level value under the positive visual angle and adopt each locations of pixels to need not to be adjusted accordingly, help simplified design with the change of image information with a kind of drive signal.Moreover, the drive signal that pixel adopted that drives same gray level under the positive visual angle in the foregoing description comprises continuous schedule drive signal and pulsed drive signal, but the present invention is as limit, also can adopt the pulsed drive signal of a plurality of different kenels to drive the pixel that has same gray level under the positive visual angle and realize the peep-proof effect.
In sum, the embodiment of the invention is utilized a plurality of sub-picture frames to show individual picture and is made the pixel with same gray level provide different drive signals in the picture procedure for displaying, so that the pixel voltage of the pixel of same gray level when this a little picture frame shows is by modulation, and then make these pixels when watching with great visual angle, present different GTG, reach peep-proof effect with great visual angle.
Though the present invention with preferred embodiment openly as above; but be not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and modification, so protection scope of the present invention is as the criterion when looking the accompanying Claim book person of defining.
Claims (9)
1. an anti-peeping display method is characterized in that, comprises step:
Utilize a plurality of sub-picture frame that shows continuously to show individual picture; And
In this picture procedure for displaying, the pixel of same gray level provides multiple different drive signal in this picture;
Wherein, the pixel of this different drive signals representative this same gray level when this sub-picture frame shows provides different pixel voltages.
2. anti-peeping display method as claimed in claim 1 is characterized in that, this drive signal comprises at least one pulsed drive signal.
3. anti-peeping display method as claimed in claim 2 is characterized in that, this drive signal also comprises a continuous schedule drive signal.
4. anti-peeping display method as claimed in claim 1, it is characterized in that, this picture comprises a picture background and an image information, has same gray level in this picture background and adopts relevant with this image information with a kind of pattern that pixel constituted of this drive signal.
5. anti-peeping display method as claimed in claim 1, it is characterized in that, this picture comprises a picture background and an image information, has same gray level in this picture background and adopts with a kind of pattern that pixel constituted and this image information of this drive signal irrelevant.
6. an anti-peeping display method is applicable to LCD, the shown picture of this LCD be suitable for the user with one first visual angle but not second visual angle that is different from this first visual angle watch, it is characterized in that this anti-peeping display method comprises step:
Show that continuously a plurality of sub-picture frames are to show individual picture; And
In the procedure for displaying of this picture, the pixel voltage that each pixel is adopted when this a little picture frame shows in this picture of modulation presents different GTG so that watch the pixel with same gray level to watch from this second visual angle from this first visual angle.
7. anti-peeping display method as claimed in claim 6 is characterized in that, this first visual angle is positive visual angle, and this second visual angle is the inclination visual angle.
8. anti-peeping display method as claimed in claim 6 is characterized in that, in the procedure for displaying of this picture, watches the pixel voltage to small part the pixel with same gray level to change from this first visual angle.
9. anti-peeping display method as claimed in claim 8 is characterized in that, in the procedure for displaying of this picture, it is constant watching the pixel voltage of the other parts the pixel with same gray level from this first visual angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010214939XA CN101916552B (en) | 2010-06-28 | 2010-06-28 | Anti-peeping display method |
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| CN201010214939XA CN101916552B (en) | 2010-06-28 | 2010-06-28 | Anti-peeping display method |
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| CN101916552A true CN101916552A (en) | 2010-12-15 |
| CN101916552B CN101916552B (en) | 2012-03-28 |
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| CN201010214939XA Expired - Fee Related CN101916552B (en) | 2010-06-28 | 2010-06-28 | Anti-peeping display method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103237113A (en) * | 2013-03-04 | 2013-08-07 | 东莞宇龙通信科技有限公司 | Information display method and electronic equipment |
| CN110646945A (en) * | 2019-09-29 | 2020-01-03 | 京东方科技集团股份有限公司 | Display device and display method |
| CN116682379A (en) * | 2023-06-20 | 2023-09-01 | 惠科股份有限公司 | Display panel, display driving method and display device |
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| US20090135173A1 (en) * | 2007-11-27 | 2009-05-28 | Funai Electric Co., Ltd. | Liquid crystal display and method of driving liquid crystal display |
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| US20070152930A1 (en) * | 2005-12-29 | 2007-07-05 | Lg Philips Lcd Co., Ltd. | Method for driving LCD device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103237113A (en) * | 2013-03-04 | 2013-08-07 | 东莞宇龙通信科技有限公司 | Information display method and electronic equipment |
| CN110646945A (en) * | 2019-09-29 | 2020-01-03 | 京东方科技集团股份有限公司 | Display device and display method |
| CN116682379A (en) * | 2023-06-20 | 2023-09-01 | 惠科股份有限公司 | Display panel, display driving method and display device |
| CN116682379B (en) * | 2023-06-20 | 2024-04-12 | 惠科股份有限公司 | Display panel, display driving method and display device |
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| CN101916552B (en) | 2012-03-28 |
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