CN101425274B - Method for driving LCD device and the LCD device - Google Patents
Method for driving LCD device and the LCD device Download PDFInfo
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- CN101425274B CN101425274B CN 200710185173 CN200710185173A CN101425274B CN 101425274 B CN101425274 B CN 101425274B CN 200710185173 CN200710185173 CN 200710185173 CN 200710185173 A CN200710185173 A CN 200710185173A CN 101425274 B CN101425274 B CN 101425274B
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Abstract
A drive method for a liquid crystal display device is used for driving a liquid crystal display device. Each pixel of the liquid crystal display device comprises a first sub-pixel and a second sub-pixel, and the dumping direction of liquid crystal molecules positioned in the second sub-pixel is parallel to the penetrating shaft of one of polarizers when in a bright state. The drive method for the liquid crystal display device includes the steps of receiving selected signals and determining the display mode of the liquid crystal display device. When the liquid crystal display device is at a mode of normal display, the second sub-pixel is in a dark state. When the liquid crystal display device is at a mode of narrow angle display, part of the selected second sub-pixel is selected and driven and is in a bright state.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and driving method thereof, and be particularly related to a kind of liquid crystal indicator and driving method thereof of being peeped of preventing.
Background technology
Multimedia society significantly improves, and is indebted to the breakthrough progress of semiconductor element or display device mostly.With regard to display device; Have that high image quality, space utilization efficient are good, (Thin Film Transistor Liquid Crystal Display TFT-LCD) becomes the main flow in market to the thin-film transistor LCD device of low consumpting power, advantageous characteristic such as radiationless gradually.
The consumption market is a tool stylishness and light, thin, short, little to be easy to carry about with one for the appearance requirement of liquid crystal indicator.In addition, the performance requirement for liquid crystal indicator is towards characteristics such as height contrast (high contrast ratio), no GTG counter-rotating (no gray scale inversion), low colour cast (low color shift), high brightness (high luminance), high color richness, high color saturation, rapid reaction and wide viewing angles.The technology that can reach the wide viewing angle requirement has at present comprised stable twisted nematic (twisted nematic; TN) liquid crystal adds view film (wide viewing film), copline suitching type (in-plane switching; IPS) liquid crystal indicator, limit suitching type (fringe field switching) liquid crystal indicator and multi-domain perpendicular alignment-type (multi-domain vertically alignment, MVA) liquid crystal indicator etc.
With the liquid crystal indicator of wide viewing angle, the user faces in the dead ahead of liquid crystal indicator or looks side ways liquid crystal indicator in oblique the place ahead of liquid crystal indicator, can see liquid crystal indicator institute images displayed.Yet, because being easy to carry of liquid crystal indicator, thus the user usually the transport fluid crystal device go out, and use continually in public.When the user reads private letter or data in public places,, therefore have private data with being difficult to avoid and receive other people and spy on and the possibility of leaking but because the wide viewing angle characteristic of liquid crystal indicator.
Figure 1A is conventional a kind of anti-synoptic diagram of peeping the liquid crystal indicator of function that has.Show that like Figure 1A conventional liquid crystal indicator 10 disposes visual angle switching device 12 below its display panels 11, this visual angle switching device comprises two glass substrate 12a, 12b and liquid crystal layer 12c.When not opening visual angle switching device 12; Do not have voltage difference between two glass substrate 12a, the 12b; This moment, the major axis of liquid crystal molecule of liquid crystal layer 12c can be parallel to the surface of glass substrate 12a, 12b, and faced or the people of side-looking liquid crystal indicator 10 can see 10 images displayed of liquid crystal indicator.After opening visual angle switching device 12, have voltage difference between two glass substrate 12a, the 12c, make the liquid crystal deflecting element of liquid crystal layer 12c.At this moment; The people who faces liquid crystal indicator 10 can't be affected; Still can see the normal picture that liquid crystal indicator 10 is shown, but the people of side-looking liquid crystal indicator 100 can be affected, what see is not to be the normal picture that liquid crystal indicator 10 shows.
Yet this kind liquid crystal indicator 10 is than the anti-how a pair of glass substrate of liquid crystal indicator of peeping function of general not tool, so cost is higher.In addition, the normal picture deepening that visual angle switching device 12 only can make liquid crystal indicator 10 show, the people of side-looking still can distinguish the profile of general image.
Figure 1B is the anti-synoptic diagram of peeping the liquid crystal indicator of function for conventional another kind has.Show that like Figure 1B this kind liquid crystal indicator is to make each pixel 20 on the display panels have different two subpixels 22 and 24 of lqiuid crystal molecule tipping direction.Toppling over of liquid crystal molecule by in the sub-pixel 24 causes light leakage phenomena, can upset the liquid crystal indicator images displayed, lets the people of side-looking liquid crystal indicator can't watch correct image.Yet the light leak that sub-pixel 24 causes only can let image brighter, so the people of side-looking liquid crystal indicator still can distinguish the overall profile of image.
Another has the anti-synoptic diagram of peeping the liquid crystal indicator of function to Fig. 1 C for routine.Show that like Fig. 1 C the pixel 30 of this kind liquid crystal indicator is to utilize the thickness of liquid crystal layer of two subpixels 32,34 different, make the phase-delay quantity of sub-pixel 32 can be bigger than the phase-delay quantity of sub-pixel 34.Toppling over of liquid crystal molecule by in the sub-pixel 34 cause light leakage phenomena, and then what let the people of side-looking liquid crystal indicator watches is shinny image.Yet the technology of this kind liquid crystal indicator is comparatively complicated, and the people of side-looking liquid crystal indicator still can distinguish the overall profile of image.
Summary of the invention
The present invention provides a kind of driving method of liquid crystal indicator, and it can limit the angle of visibility scope of liquid crystal indicator, leaks secret to prevent other people from peeping.
The present invention provide a kind of have prevent that other people from peeping and leak the liquid crystal indicator of function of secret.
The present invention proposes a kind of driving method of liquid crystal indicator; In order to the driving liquid crystal device; Wherein this liquid crystal indicator has liquid crystal layer and a plurality of pixel, and this liquid crystal layer comprises that liquid crystal molecule and each pixel comprise first sub-pixel and second sub-pixel, wherein; Each first sub-pixel comprises first active component and first pixel electrode that is electrical connected; And each second sub-pixel comprises at least one second pixel electrode and at least one second active component, and this second active component and this second pixel electrode of this second sub-pixel are electrical connected, and this method comprises:
Receive to select signal with determine this liquid crystal indicator be in narrow visual angle display mode and normal displaying mode one of them;
When this liquid crystal indicator is in this normal displaying mode; Then when driving those first sub-pixels demonstration normal pictures, making those second sub-pixels is dark attitude, wherein; When this first sub-pixel is driven by this first active component, the lqiuid crystal molecule tipping of those first sub-pixels; And
When this liquid crystal indicator is in this narrow visual angle display mode; Then when driving those first sub-pixels demonstration normal pictures; Select partly those second sub-pixels, and to drive those second sub-pixels of selecteed part be bright attitude, wherein; When selecteed second sub-pixel is driven by this second active component, the lqiuid crystal molecule tipping of those second sub-pixels;
Wherein, those liquid crystal molecules of those first sub-pixels are toppled over towards different directions with those liquid crystal molecules of those second sub-pixels, and the GTG value that each second sub-pixel shows can be adjusted.
In one embodiment of this invention, select signal to be by user's input, to be additional in the picture signal, to produce or to produce according to the environmental parameter sensing result according to the power supply state of this liquid crystal indicator.
In one embodiment of this invention, selecting also, the method for second sub-pixel of driving part comprises the following steps.At first, liquid crystal indicator is divided into staggered a plurality of first district and a plurality of second district.Then, driving second sub-pixel that is positioned at second district is bright attitude.
The method of in one embodiment of this invention, dividing liquid crystal indicator comprises makes first district and second district be arranged as the gridiron pattern pattern.
In one embodiment of this invention, select the method for part second sub-pixel to comprise the mean flow rate of calculating first sub-pixel adjacent, and when mean flow rate is lower than a default value, then select this second sub-pixel with each second sub-pixel.In addition, default value can be 1/10th of high-high brightness that first sub-pixel can show.
In one embodiment of this invention; When liquid crystal indicator is in narrow visual angle display mode; Driving selecteed part second sub-pixel is bright attitude, and the brightness that driven second sub-pixel is shown is same as the high-high brightness that driven first sub-pixel is shown.
The present invention proposes a kind of liquid crystal indicator, comprising:
Active elements array substrates; Comprise substrate and be configured in the multi-strip scanning line on this substrate, many data lines and a plurality of pixel; And each pixel comprises first sub-pixel and second sub-pixel; Each first sub-pixel comprises first active component and first pixel electrode that is electrical connected; And each second sub-pixel comprises at least one second pixel electrode and is disposed at least one second active component on this active elements array substrates, and this second active component and this second pixel electrode of this second sub-pixel are electrical connected;
The subtend substrate is disposed at this active elements array substrates top;
Liquid crystal layer is disposed between this active elements array substrates and this subtend substrate, and this liquid crystal layer has a plurality of liquid crystal molecules;
Two polaroids are disposed at respectively on this active elements array substrates and this subtend substrate, and wherein, each polaroid has penetrating shaft, and two penetrating shafts of this two polaroid are vertical each other; And
Control module; Be used for when this liquid crystal indicator of driving is narrow visual angle display mode; Selecting those second sub-pixels of part and driving those second sub-pixels of selecteed part is bright attitude;, and the GTG value that each second sub-pixel shows can adjust, and the toppling direction of those liquid crystal molecules when bright attitude that is positioned at selecteed those second sub-pixels can be parallel to this two polaroid those penetrating shafts one of them.
In one embodiment of this invention, each first sub-pixel has the first area partition structure.
In one embodiment of this invention, the first area partition structure is protrusion or slit.
In one embodiment of this invention, the subtend substrate is a colored optical filtering substrates, and has a plurality of color filter films.
In one embodiment of this invention, color filter film corresponding first sub-pixel configuration.
In one embodiment of this invention, also dispose a plurality of color filter films on the active elements array substrates, and color filter film covers active elements array substrates.
In one embodiment of this invention, active elements array substrates also disposes a plurality of color filter films on each first sub-pixel.
In one embodiment of this invention, first active component and/or second active component are thin film transistor (TFT).
In one embodiment of this invention, the area of first sub-pixel and second sub-pixel is different.
In one embodiment of this invention, each second pixel electrode also has the second area partition structure.
In one embodiment of this invention, the second area partition structure is the protrusion towards liquid crystal layer.
In one embodiment of this invention, the second area partition structure is the slit that is depressed in second pixel electrode.
The present invention is by the first sub-pixel images displayed of optionally opening second sub-pixel, can upset the liquid crystal indicator of being watched by the side-looking angle, to reach the purpose that prevents that other people from peeping.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Figure 1A～1C has the anti-synoptic diagram of peeping the liquid crystal indicator of function for conventional three kinds.
Fig. 2 A is the active elements array substrates top view of the liquid crystal indicator of first embodiment of the invention.
Fig. 2 B is the schematic perspective view of single pixel among Fig. 2 A.
Fig. 3 A is the partial enlarged drawing of Fig. 2 A.
Fig. 3 B is light penetrating shaft and the synoptic diagram of lqiuid crystal molecule tipping direction of the polaroid of Fig. 3 A.
Fig. 4 A is not when applying a voltage to the liquid crystal layer of Figure 1B, corresponding to the arrangement synoptic diagram of the liquid crystal molecule of second sub-pixel.
Fig. 4 B applies control voltage in the visual angle of present embodiment during adjustable liquid crystal indicator, corresponding to the synoptic diagram of the lqiuid crystal molecule tipping of second sub-pixel.
Fig. 5 is the driving method block diagram of the liquid crystal indicator of one embodiment of the invention.
Fig. 6 A is the normal images displayed of liquid crystal indicator.
Fig. 6 B is the second whole sub-pixel when being all bright attitude, the image that the user sees.
When Fig. 6 C is bright attitude for partly second sub-pixel, the image that the user sees.
Fig. 7 is for being divided into liquid crystal indicator the synoptic diagram in staggered a plurality of first district and a plurality of second districts.
The main element symbol description
10: liquid crystal indicator
11: display panels
12: the visual angle switching device
12a, 12b: glass substrate
12c: liquid crystal layer
20,30: pixel
22,24,32,34: sub-pixel
200: active elements array substrates
210: substrate
212,302: the surface
220: sweep trace
230: data line
240: pixel
240a: first sub-pixel
240b: second sub-pixel
242: the first active components
244: the first pixel electrodes
246: the second active components
248: the second pixel electrodes
250: the first area partition structure
260: the second area partition structure
300: the subtend substrate
400: liquid crystal layer
410: liquid crystal molecule
410a: corresponding to the liquid crystal molecule of first sub-pixel
410b: corresponding to the liquid crystal molecule of second sub-pixel
500,600: polaroid
1000: liquid crystal indicator
1000a: first district
1000b: second district
A, B, C, D, E, F, G, H: direction
Embodiment
Fig. 2 A is the active elements array substrates top view of the liquid crystal indicator of first embodiment of the invention, and Fig. 2 B is the schematic perspective view of single pixel among Fig. 2 A.Please be simultaneously with reference to figure 2A and 2B, the liquid crystal indicator 1000 of present embodiment can be the liquid crystal indicator of monocrystalline cave spacing or twin crystal cave spacing, according to the demand decision.Liquid crystal indicator 1000 has a plurality of pixels 240, and wherein each pixel 240 has the first sub-pixel 240a and the second sub-pixel 240b.This liquid crystal indicator 1000 comprises active elements array substrates 200, subtend substrate 300, liquid crystal layer 400 and two polaroids 500,600.
Active elements array substrates 200 comprises substrate 210 and is configured in the multi-strip scanning line 220 on the substrate 210, many data lines 230, a plurality of first sub-pixel 240a and a plurality of second sub-pixel 240b, wherein the first sub-pixel 240a and the second sub-pixel 240b and sweep trace 220 and data line 230 corresponding electric connections.Each first sub-pixel 240a comprises first active component 242, first pixel electrode 244, and first active component 242 and first pixel electrode 244 are electrical connected.In the present embodiment, each second sub-pixel 240b comprises second active component 246 and second pixel electrode 248, and second active component 246 and second pixel electrode 248 are electrical connected.In other embodiments, also can be only on active elements array substrates 200, to dispose one second active component, and the second all pixel electrodes 248 be electrical connected in this second active component.
Above-mentioned first active component 242 and second active component 246 are all thin film transistor (TFT).Perhaps, first active component 242 is a thin film transistor (TFT), and second active component 246 can be other active components such as diode.In addition, it is identical or different that the area of the first sub-pixel 240a and the area of the second sub-pixel 240b can be, and need decide according to use.
Polaroid 500,600 is disposed at respectively on active elements array substrates 200 and the surface 212,302 of subtend substrate 300 away from liquid crystal layer 400, and wherein the light penetrating shaft of two polaroids 500,600 is vertical each other.
Fig. 3 A is the partial enlarged drawing of Fig. 2 A.Please be simultaneously with reference to figure 2B and Fig. 3 A; Active elements array substrates 200 has first area partition structure 250 in each first sub-pixel 240a; And the first area partition structure 250 among Fig. 2 B for example is the strip protrusion of arrow type (arrow type), and the first area partition structure that other possibly implemented can be the slit of pixel electrode or the alignment film of patterning.Fig. 3 B is light penetrating shaft and the synoptic diagram of lqiuid crystal molecule tipping direction of the polaroid of Fig. 3 A.For Graphic Expression is clear, so Fig. 3 B only illustrates with the light penetrating shaft and the liquid crystal molecule of polaroid.Show that like Fig. 3 B by first area partition structure 250, liquid crystal molecule 410a can be just like a plurality of pre-dumping directions of A, B, C, D four direction.
In order to limit the angle of visibility scope of liquid crystal indicator 1000, therefore on second pixel electrode 248, dispose second area partition structure 260, and this second area partition structure 260 is the protrusion of strip.By second area partition structure 260, liquid crystal molecule 410b is had be different from the orientation of A, B, C, D four direction, so liquid crystal molecule 410b can be just like the pre-dumping direction of the E shown in Fig. 2 B, F direction.Other the second area partition structure that possibly implement can be the slit of pixel electrode or the alignment film of patterning.
Fig. 4 A is not when applying a voltage to the liquid crystal layer of Fig. 2 B, corresponding to the arrangement synoptic diagram of the liquid crystal molecule of second sub-pixel.For Graphic Expression is clear, so Fig. 4 A is identical with Fig. 3 B, only illustrates with the light penetrating shaft and the liquid crystal molecule of polaroid.Fig. 5 is the driving method block diagram of the liquid crystal indicator of one embodiment of the invention.Please be simultaneously with reference to figure 2B, Fig. 3 B, Fig. 4 A and Fig. 5.
When driving liquid crystal device 1000 not, be positioned at the liquid crystal molecule 410a of the first sub-pixel 210a and the second sub-pixel 210b, the major axis bearing of trend of 410b is approximately perpendicular to the surface 212 of substrate 210.When light through after the polaroid 600, can be absorbed with the polarized light of the light penetrating shaft EF different directions of polaroid 600.Afterwards, the polarization direction is that the light of EF gets into liquid crystal molecule 410, because liquid crystal molecule 410 is not toppled over, the light that therefore penetrates from liquid crystal molecule 410 can not change its polarization direction.At last; Light is through polaroid 500 time; Because the light penetrating shaft GH of polaroid 500 is vertical each other with the light penetrating shaft EF of polaroid 600, so the polarization direction is that the light of EF can be absorbed and can't appear from liquid crystal indicator 1000 by polaroid 500, and the first sub-pixel 210a is dark attitude at this moment.
When desiring driving liquid crystal device 1000, liquid crystal indicator 1000 can receive selects signal, and this selects signal can determine liquid crystal indicator 1000 to show with narrow visual angle display mode or normal displaying mode, like step S100.
The selection signal of present embodiment can be via user's input, be additional in the picture signal, produces according to the power supply state of this liquid crystal indicator or produce according to the environmental parameter sensing result.In detail, when the user thinks that next liquid crystal indicator 1000 want images displayed to belong to secret and can not outflow, the user can utilize manual pressing keys or show with narrow visual angle display mode via software indicator solution crystal device 1000.Perhaps; Indicator solution crystal device 1000 also can be to be additional in the picture signal with the instruction that narrow visual angle display mode shows; For example when the user opened the picture signal of this instruction with the display mode demonstration of narrow visual angle, liquid crystal indicator 1000 just can automatically perform with narrow visual angle display mode and show.Moreover, also can be to determine whether selecting showing with narrow visual angle display mode according to the environmental parameter sensing result, for example be the environmental parameter of ambient brightness and so on.In addition; It also can be the electric power supply condition of Auto-Sensing liquid crystal indicator 1000 and getting; Do not open narrow visual angle display mode when for example liquid crystal indicator 1000 is battery-powered; And when liquid crystal indicator 1000 be when utilizing electric wire to connect external power source, just open narrow visual angle display mode automatically.
When selecting liquid crystal indicator 1000 to show, then when driving first sub-pixel, 2100 demonstration normal pictures, make second sub-pixel 2200 be dark attitude, like step S110 with normal displaying mode.In detail, can apply driving voltage during driving liquid crystal device 1000 so that the liquid crystal molecule 410a that is positioned at the first sub-pixel 240a topples over and makes light to penetrate towards A, B, C, D four direction, the first sub-pixel 240a is bright attitude.At this moment, the liquid crystal molecule 410b in the second sub-pixel 240b does not receive driven and topples over, so light can't penetrate, and is dark attitude.Therefore, liquid crystal indicator 1000 is in normal demonstration mode, is positioned at liquid crystal indicator 1000 dead aheads or the people of side, can see liquid crystal indicator 1000 images displayed.It " dark attitude " described in this instructions is meant that light can't pass through the state of the liquid crystal molecule in this district, and " bright attitude " is meant that then light can pass through the state of the liquid crystal molecule in this district.
When selecting liquid crystal indicator 1000 to show, then when driving first sub-pixel 240a demonstration normal pictures, select the second sub-pixel 240b partly, like step S120 with narrow visual angle display mode.
In one embodiment, the method for selecting the second sub-pixel 240b partly is for calculating the mean flow rate of the first sub-pixel 240a adjacent with each second sub-pixel 240b.When mean flow rate is lower than default value, then select this second sub-pixel 240b, like step S122.This default value can be set at 1/10th of high-high brightness that the first sub-pixel 240a can show.When aforementioned mean flow rate is greater than or equal to this default value, then do not select this second sub-pixel 240b, like step S124.
Driving the selecteed second sub-pixel 240b afterwards is bright attitude, like step S130.Fig. 4 B applies driving voltage during adjustable liquid crystal indicator, to be positioned at the synoptic diagram of the lqiuid crystal molecule tipping of second sub-pixel in the visual angle of present embodiment.Please be simultaneously with reference to figure 2B, Fig. 3 B and Fig. 4 B.The method that to drive the selecteed second sub-pixel 240b be bright attitude is to apply driving voltage so that second active component 246 (showing like Fig. 2 A) conducting of the selecteed second sub-pixel 240b; Can be activated with second pixel electrode, 248 corresponding liquid crystal molecule 410b that second active component 246 is electrically connected and topple over towards E, F direction; Therefore liquid crystal indicator 1000 has the light leak of G, H direction, and the second sub-pixel 240b is bright attitude by G, the sight of H direction.In the present embodiment, the brightness that drives the selecteed second sub-pixel 240b and be bright attitude and can be this second sub-pixel 240b is increased to than mean flow rate for high, with effective interference picture.Wherein, the method that improves the brightness of this second sub-pixel 240b can be that the color filter film with corresponding this second sub-pixel 240b on the subtend substrate 300 removes.
Hold above-mentionedly, in the present embodiment, the selecteed second sub-pixel 240b can be the second whole sub-pixel 240b, also can be the second sub-pixel 240b partly.Fig. 6 A is that the normal images displayed of liquid crystal indicator, Fig. 6 B are the second whole sub-pixel when being all bright attitude, the image that the user sees, and Fig. 6 C is when being bright attitude for second sub-pixel partly, the image that the user sees.Can know that by Fig. 6 A and 6B if when all driving the second all sub-pixel 240b for bright attitude, the people of side-looking sees is a brighter image.Can be known that by Fig. 6 C selecting the second sub-pixel 240b partly is bright attitude, what the people of side-looking saw is image bright, dark skewness, can more effectively upset the display image that the people that watched by liquid crystal indicator 1000 sides can watch.In one embodiment; More can utilize the second lower sub-pixel 240b of mean flow rate of first sub-pixel 2100 around driving is bright attitude; And will around the second higher sub-pixel 240b of mean flow rate of the first sub-pixel 240a remain on dark attitude, can let the Luminance Distribution of the being seen picture of side-looking obviously different with the Luminance Distribution of facing being seen picture.Particularly; The being seen picture of side-looking can be drawn high brightness because of the second sub-pixel 240b is bright attitude in originally darker zone; And upset normal pictures that the first sub-pixel 240a shown effectively by the being seen effect in side-looking angle, to reach the purpose that prevents that other people from peeping.
Though be that bright attitude or dark attitude are explained all in the present embodiment with the second sub-pixel 240b; But those skilled in the art should know that after considering this instructions in light of actual conditions also can drive the second sub-pixel 240b shows various GTG values, but not simple bright attitude or dark attitude.Meaning promptly, the brightness that can drive the second sub-pixel 240b between high-high brightness and complete dark between.For example, when liquid crystal indicator 1000 is in narrow visual angle display mode, is driven to the brightness that the second sub-pixel 240b of bright attitude shown and is same as the high-high brightness that is shown among driven all first sub-pixel 240a.
In addition, the first sub-pixel 240a and the second sub-pixel 240b are staggered.This alleged being staggered be not limited to each first sub-pixel 240a around all in abutting connection with the second sub-pixel 240b; Also can be to arrange mutual again interting after the first sub-pixel 240a and the second sub-pixel 240b are lined up multiple row respectively, also or other suitable arrangement mode.
In addition; Though each of present embodiment second sub-pixel 240b comprises second pixel electrode 248 and second active component 246; But in other embodiment, also can be, and second pixel electrode 248 and second active component 246 of all second sub-pixel 240b is electrical connected at one second active component 246 of active elements array substrates 200 configurations; Let the second sub-pixel 240b present bright attitude simultaneously, to reach the purpose of interfering picture.Perhaps, also can be that second pixel electrode 248 of a plurality of second active components 246 and one second sub-pixel 240b is electrical connected, made a plurality of second sub-pixel 240b simultaneously bright, remaining second sub-pixel 240b is dark simultaneously, looks demand and decides.
In another embodiment, select the second sub-pixel 240b partly following to carry out method of driving.Fig. 7 is for being divided into liquid crystal indicator the synoptic diagram in staggered a plurality of first district and a plurality of second districts.In this mode, be divided into staggered a plurality of first district 1000a and a plurality of second district 1000b to liquid crystal indicator 1000, each the first district 1000a and the second district 1000b comprise a plurality of first sub-pixel 240a and a plurality of second sub-pixel 240b.Simultaneously, selection is positioned at the second sub-pixel 240b of the second district 1000b and is driven to bright attitude.In the present embodiment; The method of dividing liquid crystal indicator 1000 comprises makes the first district 1000a and the second district 1000b be arranged as the gridiron pattern pattern, but the arrangement mode of the first district 1000a and the second district 1000b also can be a plurality of staggered strips zone, a plurality of staggered delta-shaped regions or other suitable mode.Can know that by Fig. 7 the second sub-pixel 240b that is positioned at the second district 1000b is dark attitude, can't receive the interference of the second sub-pixel 240b when therefore the normal pictures of the first sub-pixel 240a of second district 1000b demonstration is watched by the side-looking angle.Therefore and the second sub-pixel 240b that is positioned at the first district 1000a is bright attitude, can receive interference and the confusion of the second sub-pixel 240b when normal pictures of the first sub-pixel 240a of first district 1000a demonstration is watched by the side-looking angle.By this, by the people that the side of liquid crystal indicator 1000 is spied on, can see the normal pictures of second district 1000b demonstration and the picture that the first district 1000a is disturbed simultaneously, and can't understand this chaotic picture.
In sum; Liquid crystal indicator of the present invention and driving method thereof utilize second sub-pixel that optionally drives at least partly, change the Luminance Distribution of display frame with the part; The picture that disturbs other people to see effectively by the side of liquid crystal indicator, and then reach and prevent the purpose peeped.
Though the present invention discloses as above with preferred embodiment; Right its is not in order to limit the present invention; Any those of ordinary skill in the art; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the appended claim person of defining.
Claims (15)
1. the driving method of a liquid crystal indicator; In order to the driving liquid crystal device; Wherein this liquid crystal indicator has liquid crystal layer and a plurality of pixel, and this liquid crystal layer comprises that liquid crystal molecule and each pixel comprise first sub-pixel and second sub-pixel, wherein; Each first sub-pixel comprises first active component and first pixel electrode that is electrical connected; And each second sub-pixel comprises at least one second pixel electrode and at least one second active component, and this second active component and this second pixel electrode of this second sub-pixel are electrical connected, and this method comprises:
Receive to select signal with determine this liquid crystal indicator be in narrow visual angle display mode and normal displaying mode one of them;
When this liquid crystal indicator is in this normal displaying mode; Then when driving those first sub-pixels demonstration normal pictures, making those second sub-pixels is dark attitude, wherein; When this first sub-pixel is driven by this first active component, the lqiuid crystal molecule tipping of those first sub-pixels; And
When this liquid crystal indicator is in this narrow visual angle display mode; Then when driving those first sub-pixels demonstration normal pictures; Select partly those second sub-pixels, and to drive those second sub-pixels of selecteed part be bright attitude, wherein; When selecteed second sub-pixel is driven by this second active component, the lqiuid crystal molecule tipping of those second sub-pixels;
Wherein, those liquid crystal molecules of those first sub-pixels are toppled over towards different directions with those liquid crystal molecules of those second sub-pixels, and the GTG value that each second sub-pixel shows can be adjusted.
2. the driving method of liquid crystal indicator as claimed in claim 1, wherein this selection signal is by user's input, is additional in the picture signal, produces according to the power supply state of this liquid crystal indicator or produces according to the environmental parameter sensing result.
3. the driving method of liquid crystal indicator as claimed in claim 1, wherein select and the method for those second sub-pixels of driving part comprises:
This liquid crystal indicator is divided into staggered a plurality of first district and a plurality of second district; And
Those second sub-pixels that driving is positioned at those second districts are bright attitude.
4. the driving method of liquid crystal indicator as claimed in claim 3, the method for wherein dividing this liquid crystal indicator comprises:
Make those first districts and those second districts be arranged as the gridiron pattern pattern.
5. the driving method of liquid crystal indicator as claimed in claim 1, wherein selecting partly, the method for those second sub-pixels comprises:
The mean flow rate of calculating and those first sub-pixels that respectively this second sub-pixel is adjacent, and when this mean flow rate is lower than default value, then select this second sub-pixel.
6. the driving method of liquid crystal indicator as claimed in claim 5, wherein this default value is 1/10th of those first sub-pixels high-high brightness that can show.
7. the driving method of liquid crystal indicator as claimed in claim 1; Wherein when this liquid crystal indicator is in this narrow visual angle display mode; Driving those second sub-pixels of selecteed part is bright attitude, and the brightness that driven those second sub-pixels are shown is same as the high-high brightness that driven those first sub-pixels are shown.
8. liquid crystal indicator comprises:
Active elements array substrates; Comprise substrate and be configured in the multi-strip scanning line on this substrate, many data lines and a plurality of pixel; And each pixel comprises first sub-pixel and second sub-pixel; Each first sub-pixel comprises first active component and first pixel electrode that is electrical connected; And each second sub-pixel comprises at least one second pixel electrode and is disposed at least one second active component on this active elements array substrates, and this second active component and this second pixel electrode of this second sub-pixel are electrical connected;
The subtend substrate is disposed at this active elements array substrates top;
Liquid crystal layer is disposed between this active elements array substrates and this subtend substrate, and this liquid crystal layer has a plurality of liquid crystal molecules;
Two polaroids are disposed at respectively on this active elements array substrates and this subtend substrate, and wherein, each polaroid has penetrating shaft, and two penetrating shafts of this two polaroid are vertical each other; And
Control module; Be used for when this liquid crystal indicator of driving is narrow visual angle display mode; Selecting those second sub-pixels of part and driving those second sub-pixels of selecteed part is bright attitude;, and the GTG value that each second sub-pixel shows can adjust, and the toppling direction of those liquid crystal molecules when bright attitude that is positioned at selecteed those second sub-pixels can be parallel to this two polaroid those penetrating shafts one of them.
9. liquid crystal indicator as claimed in claim 8, wherein each first sub-pixel has the first area partition structure.
10. liquid crystal indicator as claimed in claim 9, wherein those first area partition structures are protrusion or slit.
11. liquid crystal indicator as claimed in claim 8, wherein those first active components and/or those second active components are thin film transistor (TFT).
12. liquid crystal indicator as claimed in claim 8, wherein the area of those first sub-pixels and those second sub-pixels is different.
13. liquid crystal indicator as claimed in claim 8, wherein each second pixel electrode also has the second area partition structure.
14. liquid crystal indicator as claimed in claim 13, wherein this second area partition structure is a protrusion, and this protrusion is towards this liquid crystal layer.
15. liquid crystal indicator as claimed in claim 13, wherein this second area partition structure is a slit, and this slit is depressed in this second pixel electrode.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5260468B2 (en) * | 2009-10-22 | 2013-08-14 | スタンレー電気株式会社 | Liquid crystal display |
| TWI447490B (en) * | 2011-05-05 | 2014-08-01 | Au Optronics Corp | Liquid crystal display panel |
| TWI428675B (en) * | 2011-05-19 | 2014-03-01 | Au Optronics Corp | Display apparatus |
| CN102855453A (en) * | 2011-06-30 | 2013-01-02 | 网秦无限（北京）科技有限公司 | Method and system for preventing mobile device screen display from being peeped |
| CN102402918B (en) * | 2011-12-20 | 2014-07-09 | 深圳Tcl新技术有限公司 | Method for improving picture quality and liquid crystal display (LCD) |
| TWI488168B (en) * | 2013-01-07 | 2015-06-11 | Au Optronics Corp | Display device with adjustable viewing angle and driving method thereof |
| CN104122705A (en) * | 2014-07-11 | 2014-10-29 | 京东方科技集团股份有限公司 | Display panel, displayer, display device and driving method |
| CN104122726B (en) | 2014-07-11 | 2017-09-26 | 京东方科技集团股份有限公司 | Display panel, display, display device and driving method |
| CN106782371B (en) * | 2016-12-20 | 2018-01-19 | 惠科股份有限公司 | The driving method of liquid crystal display device and its liquid crystal display panel |
| CN107843993B (en) * | 2017-11-09 | 2020-01-10 | 维沃移动通信有限公司 | Control method for visual angle of display screen, mobile terminal and computer storage medium |
| CN110160002B (en) * | 2018-02-12 | 2022-02-25 | 深圳市绎立锐光科技开发有限公司 | Lighting system |
| CN108922490B (en) * | 2018-09-07 | 2021-05-25 | 惠科股份有限公司 | Display panel driving method and display device |
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