CN101311800A - Colourful cholesterin liquid-crystal display device and the drive method - Google Patents
Colourful cholesterin liquid-crystal display device and the drive method Download PDFInfo
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- CN101311800A CN101311800A CNA200810109138XA CN200810109138A CN101311800A CN 101311800 A CN101311800 A CN 101311800A CN A200810109138X A CNA200810109138X A CN A200810109138XA CN 200810109138 A CN200810109138 A CN 200810109138A CN 101311800 A CN101311800 A CN 101311800A
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- HVYWMOMLDIMFJA-UHFFFAOYSA-N 3-cholesterol Natural products C1C=C2CC(O)CCC2(C)C2C1C1CCC(C(C)CCCC(C)C)C1(C)CC2 HVYWMOMLDIMFJA-UHFFFAOYSA-N 0.000 title claims description 105
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Abstract
The invention provides a color cholesteric liquid crystal display device and a method for driving the color cholesteric liquid display. The color cholesteric liquid crystal display is provided with a color cholesteric liquid crystal display panel which is provided with a plurality of pixels, a drive module and an input device. The drive module exerts first voltage on part of the pixels of the cholesteric liquid crystal display panel to keep the display status of the part of the pixels. The input device exerts pressure on the color cholesteric liquid crystal display panel to change the display status of the other part of the pixels without the first voltage exerted on.
Description
Technical field
The present invention relates to a kind of cholesterol shape LCD device, the driving method that particularly a kind of colourful cholesterin liquid-crystal display device and image write.
Background technology
LCD (LCD) has many advantages, and for example volume is little, in light weight, low power consumption or the like.Therefore, LCD has been applied to electronic products such as hand-held computer, mobile phone widely.That is LCD Technology is just continuing towards field development light, thin and that be easy to carry about with one.
The touch-control liquid crystal display device is applied to the display device screen as mobile computer, personal computer usually, especially as on the portable electronic products such as personal digital assistant.Wherein some flat-panel screens is the location sensing escope, when stylus directly contacts display pannel, but the position of this this stylus of location sensing escope sensing.
For instance, known electric resistance touch-control location sensing escope comprises electric resistance touch-control panel and stylus.When stylus directly or entity when contacting the electric resistance touch-control panel of this electric resistance touch-control location sensing escope, electric resistance touch-control panel receives and comes from touching of stylus, so that the position of electric resistance touch-control location sensing escope sensing stylus.
Traditional touch-control liquid crystal display device is single input type LCD device by integrated touch panel (touch panel) with display panels (LCD panel).And, touch panel is arranged between eyes of user and the display panels, to reach the display that possesses hand-write input function.Yet incident light through touch panel, causes partial reflection earlier, causes the user to see and dazzles light (glaringlight), and then cause the image contrast of touch-control liquid crystal display device to reduce.
For the image contrast reduction that light causes is dazzled in solution, United States Patent (USP) US 6,982, disclose another kind of touch-control liquid crystal display device for No. 432 and comprise combination of touch control formula panel and display panels, and display panels is arranged between eyes of user and the touch panel, reaches the display that possesses hand-write input function.
Fig. 1 is for showing the diagrammatic cross-section of traditional touch-control liquid crystal display device.In Fig. 1, traditional touch-control liquid crystal display device comprises touch panel 4 and display panels 3A, and display panels 3A is arranged between user and the touch panel 4.Display panels 3A comprises that colorized optical filtering laminar substrate 31 has electrode layer 32 thereon, and transparency carrier 36 has transparent electrode layer 35 thereon, and 34 sealing 33 of scintilla dispersion type liquid crystal layer are between colorized optical filtering laminar substrate 31 and transparency carrier 36.
Moreover, United States Patent (USP) US 6,392, disclose a kind of colourful cholesterin liquid-crystal display No. 725, pile up by three layers of monochromatic cholesteric liquid crystal layer of difference and to constitute, and arrange in pairs or groups and a pair ofly write the outside that electrode is arranged at the stack of panels structure, and utilize extra electric field control to write image.
Fig. 2 piles up the synoptic diagram of display for showing three layers of cholesteric liquid crystal layer of tradition.See also Fig. 2, tradition writes the formula cholesterin liquid-crystal display device and comprises stack panel of LCD 50 and writing station 60.The stack panel of LCD comprises that a pair of subtend substrate 52,53 inserts and puts liquid crystal layer 58A, 58B and the 58C vertical stacking of three layers of different colours therebetween.Every with isolated substrate 54,55, and insert gap (spacer) 59A, 59B and 59C in each liquid crystal layer between each liquid crystal layer to keep the gap of each liquid crystal layer.Baffle 56 is arranged at the back side of infrabasal plate 53.
In addition, known technology is the chromatic colour cholesterin liquid-crystal display still, is imported by the back side by optical input device, need additional light source as the input media, be difficult for using, and the light that need add detecting layer, cause complex structure, so ease of use is low and manufacturing cost is high.
Summary of the invention
In view of this, the invention provides a kind of colourful cholesterin liquid-crystal display device, utilize input media to bestow the pressure drive unit of arranging in pairs or groups simultaneously and apply driving voltage waveform, arrange and show state to change cholesteric liquid crystal molecule.Owing to cholesteric liquid crystal molecule is arranged decision capacitance and light reflectivity, and have bistable characteristic, thereby make it have chromatic image demonstration and input function concurrently because cholesteric liquid crystal molecule is arranged.
The present invention also provides a kind of colourful cholesterin liquid-crystal display device, comprising: the color cholesterol display panels, and it has a plurality of pixels; Driver module imposes partial pixel one first voltage of this color cholesterol display panels, to keep the show state of this partial pixel; And input media, impose a pressure on this color cholesterol display panels, to change the show state of another part pixel that does not apply this first voltage.
The invention provides another kind of colourful cholesterin liquid-crystal display device, comprise a kind of colourful cholesterin liquid-crystal display device, comprising: the color cholesterol display panels, it has a plurality of colour elements; Driver module provides this color cholesterol display panels one first voltage, keeps the state of colour element; Input media presses on this color cholesterol display panels, to change the state of another colour element that does not apply this first voltage; And capacitance sensor, the show state of this each colour element of difference sensing, and be stored in the storer.
The present invention provides a kind of driving method of colourful cholesterin liquid-crystal display device in addition, comprising: a kind of colourful cholesterin liquid-crystal display device is provided, and it has a plurality of colored sub-pixels and comprises first look time pixel, second look time pixel and the 3rd look time pixel; Export first voltage waveform to this colourful cholesterin liquid-crystal display by this driver module, make each color cholesterol liquid crystal layer all be dark attitude; And import the first look image, the second look image, the 3rd look image in this colourful cholesterin liquid-crystal display with input media.
For the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is for showing the diagrammatic cross-section of traditional touch-control liquid crystal display device;
Fig. 2 piles up the synoptic diagram of display for showing three layers of cholesteric liquid crystal layer of tradition;
Fig. 3 is for showing the diagrammatic cross-section according to the cholesterol type LCD device of the embodiment of the invention;
Fig. 4 A and 4B show the molecules align synoptic diagram of plane attitude texture (planar texture state) with the burnt awl attitude texture (focal conic texture state) of cholesterol liquid crystal respectively;
Fig. 5 for show cholesterol type LCD under the impressed voltage by the synoptic diagram that concerns of voltage of changing mutually between plane attitude texture and the burnt awl attitude texture and reflectivity;
Fig. 6 A and 6B show the plane attitude texture of cholesterol liquid crystal and the diagrammatic cross-section of the capacitance value measuring principle of burnt awl attitude texture respectively;
Fig. 7 A-7C is for showing the diagrammatic cross-section according to the individual layer color cholesterol type LCD device device of one embodiment of the invention;
Fig. 7 D-7F shows the diagrammatic cross-section of multi layer colour cholesterol type LCD device according to another embodiment of the present invention;
Fig. 8 for show according to each liquid crystal layer of correspondence of the color cholesterol type LCD device of the embodiment of the invention under the impressed voltage by the synoptic diagram that concerns of voltage of changing mutually between plane attitude texture and the burnt awl attitude texture and reflectivity;
Fig. 9 A is for showing the block schematic diagram according to the color cholesterol type LCD device device of one embodiment of the invention;
Fig. 9 B shows the block schematic diagram of color cholesterol type LCD device device according to another embodiment of the present invention;
Figure 10 A is the process flow diagram of demonstration according to the driving method of the colourful cholesterin liquid-crystal display device of one embodiment of the invention;
Figure 10 B is the process flow diagram of demonstration according to the driving method of the colourful cholesterin liquid-crystal display device of the embodiment of the invention; And
Figure 11 A-11E is for showing that cholesterol type LCD according to the embodiment of the invention is in the show state synoptic diagram in each stage of handwriting input.
Description of reference numerals
Known portions (Fig. 1～2)
3A～display panels; 4～touch panel;
31～colorized optical filtering laminar substrate; 32～electrode layer;
33～sealing; 34～scintilla dispersion type liquid crystal layer;
35～transparent electrode layer; 36～transparency carrier;
41～electrode; 42～sealing;
43～electrode; 44～substrate;
F～pressure; 50～stack panel of LCD;
52,53～subtend substrate; 54,55～isolated substrate;
58A, 58B, 58C～gap; The liquid crystal layer of 58A, 58B, 58C～different colours;
60～writing station; 61,62～write electrode;
63～controller.
The application's part (Fig. 3～11E)
100～cholesterol type LCD; 110～the first substrates;
120～the first electrodes; 130～liquid crystal layer;
140～the second electrodes; 150～the second substrates;
310～infrabasal plate; 320～upper substrate;
330～absorption layer; 350～liquid crystal layer;
L
I～incident light; L
R～reflected light;
700a, 700b～color cholesterol type LCD device;
701～the first substrates;
702R, 702G, 702B～colored sub-pixels layer;
703R, 705R～redness time pixel electrode is right;
704R～red liquid crystal layer; 703G, 705G～green time pixel electrode is right;
704G～green liquid crystal layer; 703B, 705B～blue sub-pixels electrode pair;
704B～blue liquid crystal layer; 707,708,725,735～insulation course;
710～the first substrates; 720～the first electrodes;
730～liquid crystal layer; 740～the second electrodes;
750～the second substrates; R, G, B～colored sub-pixels;
Liquid crystal molecule is changed the curve of coking awl attitude texture in 800R, 800G, each color liquid crystal layer of 800B～correspondence by plane attitude texture;
900～color cholesterol type LCD device device;
910a, 900b～color cholesterol type LCD device panel;
920～row controller; 930～line control unit;
940～input media; 950～driver module;
960～capacitance sensor; 970～storer;
The process step of S1001-S1003 driving method;
The process step of S1010-S1090～driving method;
1100R～red display zone; 1100G～green viewing area;
1100B～blue viewing area; 1110R, 1110G, 1110B～erase area.
Embodiment
The embodiment of the invention provides a kind of colourful cholesterin liquid-crystal display device, utilizes the characteristic of cholesterol liquid crystal, for example if there is not impressed voltage, then bestows pressure and can make it bore attitude texture (F-state) by Jiao to become plane attitude texture (P-state).And if bestow specific impressed voltage, then ambient pressure can not make it bore attitude texture (F-state) by Jiao to become plane attitude texture (P-state).And possesses the colourful cholesterin liquid-crystal display of colored hand-write input function according to this characteristics design.
Fig. 3 is for showing the diagrammatic cross-section according to the cholesterol type LCD device of the embodiment of the invention.See also Fig. 3, cholesterol type LCD 100 comprises first substrate 110 and the 150 subtend settings of second substrate, inserts and puts cholesteric liquid crystal layer 130 therebetween.Cholesterol type LCD 100 has single area or a plurality of zone, wherein each corresponding one or more pixel in zone of this cholesterin liquid-crystal display.
Perhaps, cholesterol type LCD 100 is active cholesterol type LCD, comprises the array that a plurality of pixel constitutes.Each pixel of active cholesterol type LCD comprises thin film transistor (TFT) and storage capacitors.Liquid crystal layer 130 is a cholesterol liquid crystal, and tool plane attitude texture (planar texture state) and burnt awl attitude texture (focal conic texture state) bistable state.Perhaps, liquid crystal layer can be the stable twisted nematic liquid crystal that contains chiral dope.After liquid crystal layer is stressed, the ordered state of its liquid crystal molecule is changed into second state (for example plane attitude texture) by first state (for example burnt awl attitude texture), wherein liquid crystal layer 130 has first capacitance (for example Cf) under first state, reach liquid crystal layer and under second state, have second capacitance (for example Cp), and the first capacitance Cf is not equal to the second capacitance Cp in fact.
At least have bistable state because cholesteric liquid crystal molecule is arranged, behind the update displayed picture, power supply is removed, still can keep display frame, so be fit to be used for making Electronic Paper and e-book.
Fig. 4 A and 4B show the molecules align synoptic diagram of plane attitude texture (planar texture state) with the burnt awl attitude texture (focal conic texture state) of cholesterol liquid crystal respectively.In Fig. 4 A and 4B, cholesterol type LCD comprises that upper substrate 320, infrabasal plate 310, absorption layer 330 are arranged at the back side of infrabasal plate 310, reach liquid crystal layer 350 between upper and lower base plate.At least have bistable state because cholesteric liquid crystal molecule is arranged, for example during plane attitude texture (planar texture state), liquid crystal molecule is conforming with incident light L in original state
IReflection, reflected light L
RShow bright attitude, shown in Fig. 4 A.Along with impressed voltage increases, liquid crystal molecule conversion coking awl attitude texture (focal conic texture state), liquid crystal molecule is with incident light L
IScattering and show dark attitude is shown in Fig. 4 B.
Fig. 5 for show cholesterol type LCD under the impressed voltage by the synoptic diagram that concerns of voltage of changing mutually between plane attitude texture (planartexture state) and the burnt awl attitude texture (focal conic texture state) and reflectivity.The original state of liquid crystal molecule can be plane attitude texture or burnt awl attitude texture, along with voltage is cumulative, the ordered state of liquid crystal molecule can change coking awl attitude texture by plane attitude texture, or bores attitude texture by Jiao and be transformed into plane attitude texture, as the conversion between voltage V1, V2, V3, the V4 among Fig. 5.
According to the embodiment of the invention, liquid crystal layer has first capacitance (for example Cf) under this first state, reach this liquid crystal layer and have second capacitance (for example Cp) under this second state, and this first capacitance Cf is not equal to this second capacitance Cp in fact.By measuring the capacitance variations between capacitance Cf and the capacitance Cp, can know the display specific region after being subjected to impressed pressure, the state of liquid crystal layer molecule is for the principle of operation foundation of cholesterol type LCD.
Fig. 6 A and 6B show the plane attitude texture (planar texture state) of cholesterol liquid crystal and the diagrammatic cross-section of the capacitance value measuring principle of burnt awl attitude texture (focal conic texture state) respectively.By relatively low voltage is provided, 1-5V for example, this voltage can be for the capacitance that measures liquid crystal state of living in, the unlikely metamorphosis that causes between phase and phase.By this voltage signal is provided, cause the induced charge of different liquid crystal, and then measure capacitance Cp and Cf by capacitance sensor, be shown in respectively among Fig. 6 A and the 6B.According to a preferred embodiment of the invention, the capacitance Cp of plane attitude texture is 2.9nF, and the capacitance Cf of burnt awl attitude texture is 5.2nF.
Fig. 7 A-7C is for showing the diagrammatic cross-section according to the individual layer color cholesterol type LCD device device of one embodiment of the invention.See also Fig. 7 A, color cholesterol type LCD device 700a comprises the color cholesterol display panels of individual layer pattern, and it has a plurality of colored sub-pixels R, G, B.Each colored sub-pixels comprises between first substrate 710 and the 750 subtend settings of second substrate having the gap, and 730 pairs of color cholesterol liquid crystal layers should colored sub-pixels be folded between first substrate 710 and second substrate 750.Color cholesterol liquid crystal layer 730 has first show state and second show state at least, and first show state is not equal to second show state in fact.
Color cholesterol type LCD device 700a can be passive cholesterol type LCD, be positioned at first electrode 720 that has on first substrate 710 along first direction, and on second substrate 750, have second electrode 740, and first direction is vertical mutually with second direction along second direction.
Perhaps, being positioned at first electrode 720 on first substrate 710, is whole electrode, is positioned at second electrode 740 on second substrate 750, is to strip shaped electric poles that should color cholesterol liquid crystal layer 730.
According to the embodiment of the invention, second substrate (for example upper substrate) 750 is a flexible base plate, for example polycarbonate (PC) substrate, polyethersulfone resin (PES) substrate, polyethylene terephthalate (PET) substrate, pi (PI) substrate, poly-norbornene (PNB) substrate, polyetheretherketone (PEEK) substrate, polyethylene naphthalenedicarboxylate (polyethylene napthalate, PEN) substrate, polyetherimide (PEI) substrate or Aromatic polyester (PAR) substrate.
Perhaps, color cholesterol type LCD device 700a is active cholesterol type LCD, comprises the array that a plurality of pixel constitutes.Each pixel of active cholesterol type LCD comprises thin film transistor (TFT) and storage capacitors.
See also Fig. 7 B, color cholesterol type LCD device 700b has insulation course 725, between the color cholesterol liquid crystal 730 and first electrode 720.
See also Fig. 7 C, color cholesterol type LCD device 700c has insulation course 735, between the color cholesterol liquid crystal 730 and second electrode 740.
Fig. 7 D-7F shows the diagrammatic cross-section of multi layer colour cholesterol type LCD device according to another embodiment of the present invention.See also Fig. 7 D, color cholesterol type LCD device 700bd is the color cholesterol display panels of multilayer pattern, and it comprises between first substrate 701 and the 706 subtend settings of second substrate having a plurality of colored sub-pixels layer 702R, 702G, 702B.Each colored sub-pixels layer 702R, 702G, 702B have at least one first show state and second show state respectively, and first show state is not equal to second show state in fact.
Each colored sub-pixels layer 702R, 702G, 702B comprise pair of electrodes, and for example red time pixel electrode is to pressing from both sides between 703R, the 705R with red liquid crystal layer 704R; Green time pixel electrode is to pressing from both sides between 703G, the 705G with green liquid crystal layer 704G; And folder is with blue liquid crystal layer 704B between blue sub-pixels electrode pair 703B, the 705B.Each electrode pair electrically connects this driver module respectively, wherein has insulation course (not shown) on each electrode surface, to prevent directly contact between the electrode.Wherein, each is to electrode, and 703R, 705R and 703G, 705G and 703B, 705B can be whole electrode or passive matrix (passive matrix) electrode.
According to the embodiment of the invention, second substrate (for example upper substrate) 706 is a flexible base plate, for example polycarbonate (PC) substrate, polyethersulfone resin (PES) substrate, polyethylene terephthalate (PET) substrate, pi (PI) substrate, poly-norbornene (PNB) substrate, polyetheretherketone (PEEK) substrate, polyethylene naphthalenedicarboxylate (PEN) substrate, polyetherimide (PEI) substrate or Aromatic polyester (PAR) substrate.
See also Fig. 7 E, color cholesterol type LCD device 700e has insulation course 707, is positioned at liquid crystal layer of all kinds (704R, 704G, 704B) and each is between the electrode (703R, 705R and 703G, 705G and 703B, 705B).
See also Fig. 7 F, color cholesterol type LCD device 700f has insulation course 708, is positioned at each between the electrode (703R, 705R and 703G, 705G and 703B, 705B).
The liquid crystal layer of each colored sub-pixels is a cholesterol liquid crystal, and tool plane attitude texture (planar texturestate) and burnt awl attitude texture (focal conic texture state) bistable state.Perhaps, liquid crystal layer can be the stable twisted nematic liquid crystal that contains chiral dope.After liquid crystal layer was stressed, the ordered state of its liquid crystal molecule was changed into second state (for example plane attitude texture) by first state (for example burnt awl attitude texture).
According to the characteristic of cholesterol liquid crystal, for example, then bestow pressure in liquid crystal layer if there is not impressed voltage, can make it bore attitude texture (F-state) and become plane attitude texture (P-state) by Jiao.And if bestow specific impressed voltage, then ambient pressure can not make it bore attitude texture (F-state) by Jiao to become plane attitude texture (P-state).And possesses the colourful cholesterin liquid-crystal display of colored hand-write input function according to this characteristics design.The state of cholesterol liquid crystal is listed in table one with the relation that applies voltage and ambient pressure.
Table one
| Cholesterol liquid crystal is the F-attitude, and exerts pressure | Cholesterol liquid crystal is the P-attitude, and exerts pressure | |
| No impressed voltage | Transfer the P-attitude to by the F-attitude | Still keep the P-attitude |
| Impressed voltage is arranged | Still keep the F-attitude | Transfer the F-attitude to by the P-attitude |
Fig. 8 for show according to each liquid crystal layer of correspondence of the color cholesterol type LCD device of the embodiment of the invention under the impressed voltage by the synoptic diagram that concerns of voltage of changing mutually between plane attitude texture (planar texture state) and the burnt awl attitude texture (focal conictexture state) and reflectivity.Curve 800R, 800G, 800B represent that respectively the original state of liquid crystal molecule in each color liquid crystal layer can be plane attitude texture or burnt awl attitude texture, along with voltage is cumulative, the ordered state of liquid crystal molecule can change coking awl attitude texture by plane attitude texture, or bores attitude texture by Jiao and be transformed into plane attitude texture.It should be noted that each liquid crystal color layer is also inconsistent to the reaction of voltage, therefore in part embodiment, needing provide different driving voltage and waveforms at different colored liquid crystal layers.
Fig. 9 A is for showing the block schematic diagram according to the color cholesterol type LCD device device of one embodiment of the invention.See also Fig. 9 A, a kind of color cholesterol type LCD device device 900a comprises color cholesterol type LCD device 910, and it has a plurality of pixels.Driver module 950 imposes partial pixel one first voltage of this colourful cholesterin liquid-crystal display 910, to keep the show state of this partial pixel.Input media 940 presses on this colourful cholesterin liquid-crystal display 910, to change the show state of another part pixel that does not apply this first voltage.That is, make the show state of this cholesteric liquid crystal layer bore the attitude TEXTURE STATE by this Jiao, become this plane attitude TEXTURE STATE.
Fig. 9 B shows the block schematic diagram of color cholesterol type LCD device device according to another embodiment of the present invention.See also Fig. 9 B, a kind of color cholesterol type LCD device device 900b, comprise that color cholesterol type LCD device 910 has first substrate and the second substrate subtend setting, insert and put cholesteric liquid crystal layer therebetween, wherein this cholesteric liquid crystal layer has first show state and second show state at least, and this first show state is not equal to this second show state in fact.Input media 940 is bestowed pressure in this cholesterin liquid-crystal display 910, makes the show state of this cholesteric liquid crystal layer bore the attitude TEXTURE STATE by this Jiao, becomes this plane attitude TEXTURE STATE.The picture of color cholesterol type LCD device 910 shows by row controller 920 and line control unit 930 control image informations.The show state of capacitance sensor 960 sensing cholesteric liquid crystal layers, and export first sensing result or second sensing result, be stored in storer 970.Driver module 950 provides this cholesterin liquid-crystal display one voltage waveform, to upgrade the show state of this cholesterol type LCD, becomes this Jiao and bores the attitude TEXTURE STATE.According to a preferred embodiment of the invention, storer 970 is built in colourful cholesterin liquid-crystal display 910 in being.Perhaps, storer 970 can in be built in driver module 950 or capacitance sensor 960.Moreover capacitance sensor 960 can be selected built-in in driver module 950.
Figure 10 A is the process flow diagram of demonstration according to the driving method of the colourful cholesterin liquid-crystal display device of one embodiment of the invention.At first, provide colourful cholesterin liquid-crystal display device (as step S1001), it has a plurality of pixels.These a plurality of pixels comprise first look time pixel, second look time pixel and the 3rd look time pixel, cooperate driver module.Then, export the partial pixel of first voltage waveform, to keep its show state (as step S1002) to this colourful cholesterin liquid-crystal display by this dynamic model piece.Then, bestow with pressure on this color cholesterol display panels, to change the show state (as step S1003) of another part pixel that does not apply this first voltage by input media.For example, import the first look image, the second look image, the 3rd look image in regular turn in this colourful cholesterin liquid-crystal display with hand input device.
Figure 10 B is the process flow diagram of demonstration according to the driving method of the colourful cholesterin liquid-crystal display device of the embodiment of the invention.At first, provide colourful cholesterin liquid-crystal display device, these a plurality of colored sub-pixels comprise first look time pixel, second look time pixel and the 3rd look time pixel, and wherein this capacitance sensor cooperates a driver module.Then, export first voltage waveform to this colourful cholesterin liquid-crystal display, make each color cholesterol liquid crystal layer all present dark attitude (S1010) by this driver module.Import the first look image in this colourful cholesterin liquid-crystal display (S1020) with input media, import the second look image in this colourful cholesterin liquid-crystal display (S1030) with this input media, import the 3rd look image in this colourful cholesterin liquid-crystal display (S1040) with this input media, import black image in this colourful cholesterin liquid-crystal display (S1050) with this input media.By this driver module output capacitance sensing voltage waveform to this cholesterin liquid-crystal display (S1060).With this capacitance sensor capacitance (S1070) of each color cholesterol liquid crystal layer of sensing respectively, through special algorithm (A1gorithm), the show state that can learn each pixel be dark attitude (F-state) or bright attitude (P-state) (S1080).And store the show state (S1090) in this storer of each color cholesterol liquid crystal layer.
More particularly, cholesterol type LCD device of the present invention can be by following control method operation.At first, carry out more new element (reset), upgrade the video data of colour liquid crystal display device panel.For example, export first voltage waveform (for example F-attitude control waveform), each pixel of colour liquid crystal display device panel is updated to F-attitude (promptly showing dark attitude), as the warming-up exercise before the colored handwriting input, shown in Figure 11 A by driver module.Then, see also Figure 11 B, carry out first write activity, import first look (redness) image 1100R in colourful cholesterin liquid-crystal display with hand input device.For example, export specific voltage (for example 5 volts (V)) at the inferior pixel of second look (green) and the 3rd look (blueness) respectively by driver module, then with input media, for example first look (redness) handwriting input is directly carried out at pointer or other any hard tips on the display pannel surface.The cholesterol liquid crystal characteristic listed according to table one, this moment, the zone of pressurized can present first look (redness, P-attitude), and the inferior pixel of pressurized does not still present dark attitude (F-attitude).Again for example, provide redness to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of greens time pixel is less than 1000 volts, and the impressed voltage of these a plurality of blue sub-pixels is less than 1000 volts.Then, bestow the subregion of pressure, make a plurality of colored sub-pixels in this subregion present redness in this colourful cholesterin liquid-crystal display by this input media.
Then, see also Figure 11 C, carry out second write activity, import second look (green) image 1100G in colourful cholesterin liquid-crystal display with hand input device.For example, export specific voltage (for example 5 volts (V)) at the inferior pixel of first look (redness) and the 3rd look (blueness) respectively by driver module, then with input media, for example second look (green) handwriting input is directly carried out at pointer or other any hard tips on the display pannel surface.The zone of pressurized was respectively previous and was shown red zone by handwriting input this moment, can be wiped free of (erase) once more behind the pressurized and reply dark attitude (F-state), this zone indicator only show second look (green, P-state).And the zone of another kind of pressurized is previous not become red zone by hand-written, behind pressurized directly demonstration second look (green, P-state).And the zone of pressurized also is not divided into two kinds: the first still keeps first look (redness, show state P-state) before by the zone of hand-written one-tenth first look (redness).Another is before not by the zone of hand-written demonstration first look (redness), keeps dark attitude (F-state).Again for example, provide green to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of redness time pixel is less than 1000 volts, and the impressed voltage of these a plurality of blue sub-pixels is less than 1000 volts.Then, bestow the subregion of pressure, make a plurality of colored sub-pixels in this subregion present green in this colourful cholesterin liquid-crystal display by this input media.
Then, see also Figure 11 D, carry out the 3rd write activity, import the 3rd look (blueness) image 1100B in colourful cholesterin liquid-crystal display with hand input device.For example, respectively at the inferior pixel output of first look (redness) and second look (green) specific voltage (for example 5 volts (V)),, directly carry out the 3rd look (blueness) handwriting input by driver module on the display pannel surface then with input media.This moment pressurized the zone, be divided into three kinds: one is before by the zone of hand-written demonstration first look (redness), the cholesterol liquid crystal characteristic listed according to table one, behind pressurized once more, redness can be wiped free of (erase) and return dark attitude (F-state), this zone indicator only shows the 3rd look (blueness, P-state), another was for before being shown the zone of second look (green) by hand-written one-tenth, behind pressurized once more, green can be wiped free of and reply dark attitude (F-state), this zone indicator only show the 3rd look (blueness, P-state), another kind is before not by the zone of hand-written one-tenth first look (redness) or second look (green), behind the first pressurized, this zone indicator only show the 3rd look (blueness, P-state).On the other hand, the zone of pressurized does not still keep former show state.Again for example, provide blueness to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of redness time pixel is less than 1000 volts, and the impressed voltage of these a plurality of greens time pixel is less than 1000 volts.Then, bestow the subregion of pressure, make these a plurality of colored sub-pixels in this subregion present blueness in colourful cholesterin liquid-crystal display by this input media.
Then, carry out sensing and memory (sense and memory) action, the video data of detecting and stored user handwriting input.For example, utilize Drive and Control Circuit,, detect its state of living at each pixel of display pannel.Method for detecting is as follows: at first at each pixel of display pannel, voltage waveform with the specific detecting pixel capacitance value of Drive and Control Circuit output, collocation storer and special algorithm (Algorithm), the show state that can learn each pixel is dark attitude (F-state) or bright attitude (P-state), and the voltage waveform of this detecting pixel capacitance value possesses the function of correct detecting pixel status in the shortest time.After detecting pixel state of living in, it is stored in the storer, then at next pixel, repeat above-mentioned action, up to the detecting and the storage of the state of finishing whole pixels.
(Algorithm) is as follows for this special algorithm: the first step, detect the capacitance of this pixel, and obtain capacitance C1, and C1 is stored in this storer; Second step was dark attitude F-state (or bright attitude P-state) with this pixel drive; The 3rd goes on foot, and detects the capacitance of this pixel once more, obtains capacitance C2, and C2 is stored in this storer; The 4th step, compare C1 and C2, if C1=C2, then the show state of this pixel is dark attitude F-state (or bright attitude P-state) as can be known, if C1 ≠ C2, then the show state of this pixel is bright attitude P-state (or dark attitude F-state) as can be known, at this moment, must be bright attitude P-state (or dark attitude F-state) again with this pixel drive.
Then, as when desiring to carry out erasing move, hand input device can be carried out the pattern erasing move.For example, see also Figure 11 E, driver module is at the inferior pixel region of all color cholesterol liquid crystal panels, and output specific voltage (for example 5V) then with hand input device, directly at panel surface, at the pattern of desiring to wipe, is carried out and carried out hand-written erasing move.The cholesterol liquid crystal characteristic listed according to table one, the zone of pressurized, dark attitude (F-state) still keeps dark attitude (F-state), and bright attitude (P-state) can transfer dark attitude (F-state) to, shown in regional 1110R, 1110G, 1110B, thereby can reach the purpose and the effect of wiping pattern.
For example, import black image in this colourful cholesterin liquid-crystal display with this hand input device.Can provide black to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of redness time pixel be less than 1000 volts, and the impressed voltage of the inferior pixel of this a plurality of greens is less than 1000 volts, and the impressed voltage of these a plurality of blue sub-pixels is less than 1000 volts.Then, bestow the subregion of pressure, make a plurality of colored sub-pixels in this subregion present black in this colourful cholesterin liquid-crystal display by this input media.
The embodiment of the invention is means by " specially designed impressed voltage cooperation impressed pressure " with " detecting cholesterol liquid crystal capacitance variation ", reach the function that has handwriting input and demonstration concurrently, can reach hand-write input function and Presentation Function simultaneously with single cholesterol type LCD panel.Moreover, can change cholesteric liquid crystal molecule by ambient pressure arranges, and because cholesteric liquid crystal molecule is arranged decision capacitance and light reflectivity, has bistable principle with the cholesteric liquid crystal molecule arrangement, make the cholesterol liquid crystal of display mediums, have the detecting medium of detecting handwriting input data concurrently, cholesterin liquid-crystal display is had concurrently show and input function.Moreover, simplify because its structure is relative with technology, therefore its manufacturing cost is declined to a great extent.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit scope of the present invention; any the technical staff in the technical field without departing 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 when looking being as the criterion that claim of the present invention defines.
Claims (40)
1. colourful cholesterin liquid-crystal display device comprises:
The color cholesterol display panels, it has a plurality of pixels;
Driver module imposes partial pixel one first voltage of this color cholesterol display panels, to keep the show state of this partial pixel; And
Input media imposes a pressure on this color cholesterol display panels, to change the show state of another part pixel that does not apply this first voltage.
2. colourful cholesterin liquid-crystal display device as claimed in claim 1, wherein this color cholesterol display panels is a single layer structure, it comprises:
Have the weir wall construction between first substrate and the second substrate subtend setting, separate a plurality of colored sub-pixels; And
Corresponding each this colored sub-pixels of a plurality of color cholesterol liquid crystal layers is folded between this first substrate and this second substrate, and is isolated by this weir wall construction.
3. colourful cholesterin liquid-crystal display device as claimed in claim 2 wherein has first electrode on this first substrate, has second electrode on this second substrate, and this first electrode or this second electrode, corresponding each this colored sub-pixels.
4. colourful cholesterin liquid-crystal display device as claimed in claim 3 also comprises insulation course, between these a plurality of color cholesterol liquid crystal layers and this first electrode or this second electrode.
5. colourful cholesterin liquid-crystal display device as claimed in claim 2, wherein this color cholesterol display panels is passive cholesterin liquid-crystal display, wherein has first electrode on this first substrate along first direction, have second electrode on this second substrate, and first direction is vertical in fact mutually with second direction along second direction.
6. colourful cholesterin liquid-crystal display device as claimed in claim 2, wherein this colourful cholesterin liquid-crystal display is active color cholesterol type LCD device.
7. colourful cholesterin liquid-crystal display device as claimed in claim 2, wherein this first substrate or this second substrate are flexible base plate.
8. colourful cholesterin liquid-crystal display device as claimed in claim 1, wherein each color cholesterol liquid crystal layer comprises corresponding coloured dye or contains the twisted nematic liquid crystal of chiral dope.
9. colourful cholesterin liquid-crystal display device as claimed in claim 1, wherein this color cholesterol display panels is a sandwich construction, it comprises:
Substrate; And
The multi layer colour cholesteric liquid crystal layer is stacked and placed on this substrate.
10. colourful cholesterin liquid-crystal display device as claimed in claim 9, wherein each color cholesterol liquid crystal layer all has first electrode and second electrode, and each color cholesterol liquid crystal layer is folded between this first electrode and this second electrode.
11. colourful cholesterin liquid-crystal display device as claimed in claim 10 also comprises insulation course, between this each color cholesterol liquid crystal layer and this first electrode or this second electrode.
12. colourful cholesterin liquid-crystal display device as claimed in claim 9 also comprises insulation course, between this each color cholesterol liquid crystal layer.
13. colourful cholesterin liquid-crystal display device as claimed in claim 9 also comprises protective seam, is stacked and placed on this multi layer colour cholesteric liquid crystal layer.
14. colourful cholesterin liquid-crystal display device as claimed in claim 9, wherein this substrate is a flexible base plate.
15. colourful cholesterin liquid-crystal display device as claimed in claim 13, wherein this protective seam or this substrate are flexible base plate.
16. colourful cholesterin liquid-crystal display device as claimed in claim 1, wherein each pixel comprises pair of electrodes, and it electrically connects this driver module, wherein has insulation course on this surface at least one electrode in the electrode.
17. cholesterin liquid-crystal display device as claimed in claim 1, wherein this driver module provides this color cholesterol display panels one capacitance sensing voltage waveform, for the show state of each color cholesterol liquid crystal layer of capacitance sensor sensing.
18. colourful cholesterin liquid-crystal display device as claimed in claim 17, wherein this capacitance sensor is built in this driver module in being.
19. colourful cholesterin liquid-crystal display device as claimed in claim 17 also comprises the liquid crystal arrangement state of this each color cholesterol liquid crystal layer of capacitance sensor sensing of memory storage, wherein this storer is built in this driver module or this capacitance sensor in being.
20. a colourful cholesterin liquid-crystal display device comprises:
The color cholesterol display panels, it has a plurality of colour elements;
Driver module provides this color cholesterol display panels one first voltage, keeps the state of partial colour pixel;
Input media imposes a pressure on this color cholesterol display panels, to change the state of another part colour element that does not apply this first voltage; And
Capacitance sensor, the show state of this each colour element of difference sensing, and be stored in the storer.
21. colourful cholesterin liquid-crystal display device as claimed in claim 20, wherein this color cholesterol display panels is a single layer structure, and it comprises:
Have the weir wall construction between first substrate and the second substrate subtend setting, separate a plurality of colored sub-pixels; And
Corresponding each this colored sub-pixels of a plurality of color cholesterol liquid crystal layers is folded between this first substrate and this second substrate, and is isolated by this weir wall construction.
22. colourful cholesterin liquid-crystal display device as claimed in claim 21, wherein this color cholesterol display panels is passive cholesterin liquid-crystal display, wherein has first electrode on this first substrate along first direction, have second electrode on this second substrate, and first direction is vertical in fact mutually with second direction along second direction.
23. colourful cholesterin liquid-crystal display device as claimed in claim 22 also comprises insulation course, between these a plurality of color cholesterol liquid crystal layers and this first electrode or this second electrode.
24. colourful cholesterin liquid-crystal display device as claimed in claim 21, wherein this first substrate or this second substrate are flexible base plate.
25. colourful cholesterin liquid-crystal display device as claimed in claim 20, wherein this color cholesterol display panels is a sandwich construction, and it comprises:
Substrate; And
The multi layer colour cholesteric liquid crystal layer is stacked and placed on this substrate.
26. colourful cholesterin liquid-crystal display device as claimed in claim 25, wherein each color cholesterol liquid crystal layer all has first electrode and second electrode, and each color cholesterol liquid crystal layer is folded between this first electrode and this second electrode.
27. colourful cholesterin liquid-crystal display device as claimed in claim 26 also comprises insulation course, between this each color cholesterol liquid crystal layer and this first electrode or this second electrode.
28. colourful cholesterin liquid-crystal display device as claimed in claim 25 also comprises insulation course, between this each color cholesterol liquid crystal layer.
29. colourful cholesterin liquid-crystal display device as claimed in claim 25 also comprises protective seam, is stacked and placed on this multi layer colour cholesteric liquid crystal layer.
30. colourful cholesterin liquid-crystal display device as claimed in claim 25, wherein this substrate is a flexible base plate.
31. colourful cholesterin liquid-crystal display device as claimed in claim 29, wherein this protective seam or this substrate are flexible base plate.
32. colourful cholesterin liquid-crystal display device as claimed in claim 25, wherein each color cholesterol liquid crystal layer comprises pair of electrodes, and it electrically connects this driver module, and wherein this is to having insulation course on the surface that has an electrode in the electrode at least.
33. the driving method of a colourful cholesterin liquid-crystal display device comprises:
A kind of colourful cholesterin liquid-crystal display device as claimed in claim 1 is provided, and these a plurality of pixels comprise first look time pixel, second look time pixel and the 3rd look time pixel;
Export first voltage waveform to this colourful cholesterin liquid-crystal display by this driver module, make these a plurality of pixels all be dark attitude; And
Import the first look image, the second look image, the 3rd look image in this colourful cholesterin liquid-crystal display with input media.
34. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 33 also comprises;
By this driver module output capacitance sensing voltage waveform to this cholesterin liquid-crystal display; And
With the show state of each pixel of capacitance sensor difference sensing, and export first sensing result or second sensing result respectively, be stored in the storer.
35. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 33 also comprises with this input media input black image in this color cholesterol display panels.
36. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 33 is wherein imported the first look image with this input media and is comprised in the step of this colourful cholesterin liquid-crystal display:
Provide first look to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of second looks time pixel is less than 1000 volts, and the impressed voltage of these a plurality of the 3rd looks time pixel is less than 1000 volts; And
Bestow the subregion of pressure by this input media, make this subregion present first look in this colourful cholesterin liquid-crystal display.
37. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 33 is wherein imported the second look image with this input media and is comprised in the step of this colourful cholesterin liquid-crystal display:
Provide second look to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of first looks time pixel is less than 1000 volts, and the impressed voltage of these a plurality of the 3rd looks time pixel is less than 1000 volts; And
Bestow the subregion of pressure by this input media, make this subregion present second look in this colourful cholesterin liquid-crystal display.
38. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 33 is wherein imported the 3rd look image with this input media and is comprised in the step of this colourful cholesterin liquid-crystal display:
Provide the 3rd look to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of first looks time pixel is less than 1000 volts, and the impressed voltage of these a plurality of second looks time pixel is less than 1000 volts; And
Bestow the subregion of pressure by this input media, make this subregion present the 3rd look in colourful cholesterin liquid-crystal display.
39. the driving method of colourful cholesterin liquid-crystal display device as claimed in claim 35 wherein comprises in the step of this colourful cholesterin liquid-crystal display with this input media input black image:
Provide black to write voltage waveform by this driver module, the impressed voltage that makes these a plurality of first looks time pixel is less than 1000 volts, and the impressed voltage of these a plurality of second looks time pixel is less than 1000 volts, and the impressed voltage of these a plurality of the 3rd looks time pixel is less than 1000 volts; And
Bestow the subregion of pressure by this input media, make this subregion present black in this colourful cholesterin liquid-crystal display.
40. the driving method of a colourful cholesterin liquid-crystal display device comprises:
A kind of colourful cholesterin liquid-crystal display device as claimed in claim 20 is provided, and these a plurality of colour elements comprise first look time pixel, second look time pixel and the 3rd look time pixel;
Export first voltage waveform to this colourful cholesterin liquid-crystal display by this driver module, make these a plurality of colour elements all be dark attitude;
Import the first look image, the second look image, the 3rd look image in this colourful cholesterin liquid-crystal display with input media.
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| CN200810109138XA CN101311800B (en) | 2007-05-25 | 2008-05-23 | Colourful cholesterin liquid-crystal display device and the drive method |
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