CN205301766U - Liquid crystal disply device at changeable visual angle - Google Patents
Liquid crystal disply device at changeable visual angle Download PDFInfo
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- CN205301766U CN205301766U CN201620011719.XU CN201620011719U CN205301766U CN 205301766 U CN205301766 U CN 205301766U CN 201620011719 U CN201620011719 U CN 201620011719U CN 205301766 U CN205301766 U CN 205301766U
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Abstract
The utility model provides a liquid crystal disply device at changeable visual angle, including the backlight, cholesteric liquid crystal membrane and the liquid crystal display panel, this cholesteric liquid crystal membrane inserts and puts between this backlight and this the liquid crystal display panel, this cholesteric liquid crystal membrane includes first base plate, second base plate and seal the cholesteric liquid crystal between this first base plate and this second base plate, be equipped with the first electrode in the one side that is close to this second base plate on this first base plate, be equipped with the second electrode in the one side that is close to this first base plate on this second base plate, can make this cholesteric liquid crystal present transparent attitude in plane or burnt awl scattering attitude between this first electrode and this second electrode when applying different electric field and change this liquid crystal disply device's visual angle. The conversion of cholesteric liquid crystal between the transparent attitude of plane texture and focal conic texture's scattering attitude in the cholesteric liquid crystal membrane is utilized to this embodiment, realizes the switching of display device between narrow visual angle and wide viewing angle, increases product thickness hardly, and it is more convenient to use, and the realization cost is also lower.
Description
Technical field
This utility model relates to the technical field of liquid crystal display, particularly relates to the liquid crystal indicator of a kind of switchable viewing angle.
Background technology
Liquid crystal indicator (liquidcrystaldisplay, LCD) has that image quality is good, volume is little, lightweight, low driving voltage, low-power consumption, the advantage that radiationless and manufacturing cost is relatively low, occupy an leading position in flat display field.
Current liquid crystal indicator develops towards wide viewing angle direction gradually, as adopted the liquid crystal indicator of in-plane-switching mode (IPS) or fringe field switching mode (FFS) all can realize wider visual angle. The design of wide viewing angle makes user from all directions all it can be seen that complete and distortionless picture. But, society people increasingly focus on protecting the privacy of oneself, have a lot of thing and do not like to take out and share with people. In public, always wish that oneself content when seeing the mobile phone or browsing computer is secrecy. Therefore, except the demand of wide viewing angle, under the occasion needing peep-proof, it is also desirable to display device can be switched to narrow field-of-view mode.
There are following three kinds of modes that the wide viewing angle of liquid crystal indicator is switched over narrow visual angle at present: the first is to be realized by BAIYE Protective film, when needs carry out peep-proof, utilizes BAIYE Protective film to cover screen and can reduce visual angle; The second is the visual angle arranging double; two light source back light system in a liquid crystal display for adjustable liquid crystal display display. This pair of light source back light system is made up of in conjunction with anti-prismatic lens the light guide plate of two-layer laminate, the trend that top layer light guide plate (LGP-T) changes light in conjunction with anti-prismatic lens makes light be limited in narrow angular range, realizing the narrow visual angle of liquid crystal display, bottom light guide plate (LGP-B) then realizes the wide viewing angle of liquid crystal display in conjunction with the function of anti-prismatic lens; The third is that the drive electrode on the panel of liquid crystal indicator is divided into two kinds, one of which is wide viewing angle display drive electrode, another kind is to control visual angle electrode, when liquid crystal indicator can be made to produce suitable light leak when controlling and visual angle electrode applying suitable voltage, and then realize the switching of wide viewing angle and narrow visual angle.
But, above-mentioned first kind of way has the disadvantage that this mode needs additionally preparation BAIYE Protective film, and needs user to carry with, and causes great inconvenience to user, and can only realize display pattern in narrow visual angle after having pasted anti-peeping film;The above-mentioned second way has the disadvantage that this kind of double; two light source back light systems can cause that the thickness of liquid crystal display and cost all increase, and does not meet the development trend that liquid crystal display is lightening; The third mode above-mentioned has the disadvantage that and need to arrange wide viewing angle display drive electrode on liquid crystal indicator and control visual angle two kinds of electrodes of electrode, it makes the aperture opening ratio of liquid crystal indicator reduce, the panel luminance causing liquid crystal indicator declines, and processing procedure is also more complicated, relatively costly.
Utility model content
The purpose of this utility model is in that to provide the liquid crystal indicator of a kind of switchable viewing angle, and it can realize narrow visual angle and show the switching shown with wide viewing angle, increases product thickness hardly, uses more convenient, it is achieved cost is relatively low.
This utility model embodiment provides the liquid crystal indicator of a kind of switchable viewing angle, including backlight and display panels, this liquid crystal indicator also includes cholesteric liquid crystal film, this cholesteric liquid crystal film is interposed between this backlight and this display panels, this cholesteric liquid crystal film includes first substrate, second substrate and be sealed in the cholesteric liquid crystal between this first substrate and this second substrate, this first substrate is provided with the first electrode in the side near this second substrate, this second substrate is provided with the second electrode in the side near this first substrate, this cholesteric liquid crystal can be made between this first electrode and this second electrode to present planar transparent state or burnt cone scattering states and change the visual angle of this liquid crystal indicator when applying not same electric field.
Further, between this first electrode and this second electrode when applying the first voltage, this cholesteric liquid crystal presents planar transparent state and this liquid crystal indicator realizes narrow visual angle and shows; Between this first electrode and this second electrode when applying the second voltage, this cholesteric liquid crystal presents burnt cone scattering states and this liquid crystal indicator realizes wide viewing angle and shows.
Further, this backlight has the narrow angle of divergence less than 60 degree.
Further, this display panels includes opposed thin-film transistor array base-plate and colored filter substrate and is interposed in the liquid crystal layer between this thin-film transistor array base-plate and this colored filter substrate.
Further, this first substrate and this second substrate are flexible base board.
Further, this first substrate and this second substrate are packaged as a whole by frame glue in edge, and this cholesteric liquid crystal is sealed in the box body between this first substrate and this second substrate by this frame glue.
Further, it is additionally provided with supporter in the box body between this first substrate and this second substrate.
Further, this first electrode and this second electrode are whole setting.
Further, this cholesteric liquid crystal is cholesterol liquid crystal.
The liquid crystal indicator of the switchable viewing angle that this utility model embodiment provides, by arranging cholesteric liquid crystal film in liquid crystal indicator, utilize the conversion between the clear state and the scattering states of conical texture of planar texture of the cholesteric liquid crystal in cholesteric liquid crystal film, realize liquid crystal indicator switching between narrow visual angle and wide viewing angle to show, the thickness of cholesteric liquid crystal film is little, increase the thickness of liquid crystal indicator hardly, use more convenient during view angle switch, it is achieved cost is relatively low.
Accompanying drawing explanation
Fig. 1 a to Fig. 1 d is the schematic diagram of four kinds of organizational structuries of cholesteric liquid crystal.
Fig. 2 is the assembling schematic diagram of the liquid crystal indicator of switchable viewing angle in this utility model embodiment.
Fig. 3 is the decomposing schematic representation of Fig. 2.
Fig. 4 is the structural representation of the cholesteric liquid crystal film in Fig. 2.
Fig. 5 a is that the liquid crystal indicator in Fig. 2 realizes the schematic diagram that narrow visual angle shows when cholesteric liquid crystal is in planar transparent state.
The liquid crystal indicator that Fig. 5 b is in Fig. 2 realizes, when cholesteric liquid crystal is in burnt cone scattering states, the schematic diagram that wide viewing angle shows.
Detailed description of the invention
For further setting forth that this utility model is reach technical approach and effect that predetermined utility model purpose is taked, below in conjunction with drawings and Examples, to detailed description of the invention of the present utility model, structure, feature and effect thereof, describe in detail as after.
Fig. 1 a to Fig. 1 d is the schematic diagram of four kinds of organizational structuries of cholesteric liquid crystal, and the first is planar texture state (planartexture), is called p state; The second is focal conic structure (focalconictexture), is called fc state; The third is vertical texture (homeotropictexture) or is called that field causes nematic phase, is called h state; 4th kind is of short duration plane state (transientplanartexture), is called p* state.
P state cholesteric liquid crystal applies the electric field of some strength, then cholesteric liquid crystal can be converted to fc state from p state, and its helical axis distribution is disorderly and unsystematic, is substantially oriented and substrate-parallel. When this electric field vanishing, fc state constitutes another null field stable state under certain condition. The periodicity of the cholesteric liquid crystal helical structure being in fc state has not existed, and presents multidomain state, but the helical structure in each farmland still suffers from, and therefore incident illumination is produced scattering by it. If cholesteric liquid crystal is applied sufficiently high electric field, cholesteric liquid crystal will change to h state, and this state liquid crystal molecule all arranges along direction of an electric field, and liquid crystal is transparent. To the cholesteric liquid crystal being in h state, when voltage drops to zero rapidly, liquid crystal molecule returns to p state; When voltage slowly reduces, liquid crystal molecule is then changed into fc state. In these states of cholesteric liquid crystal, only p state and fc state are stable when without external electric field. State arranged vertically (h state) only when there being external electric field just exist, p* state exist mainly in liquid crystal molecule from state arranged vertically to the process of plane state transition.
The switching that this utility model realizes narrow visual angle and wide viewing angle mainly by the clear state of the planar texture of cholesteric liquid crystal and the scattering states of conical texture shows. When the cholesteric liquid crystal being in planar texture is applied a low-frequency current field, cholesteric liquid crystal meeting occurrence dynamics scattering, become conical texture; When the cholesteric liquid crystal being in conical texture is applied a high-frequency electric field again, cholesteric liquid crystal can become transparent at once, is in planar texture. Additionally, cholesteric liquid crystal has memory effect, and when turning off electric field, the clear state of planar texture or the scattering states of conical texture can continue to keep a period of time (several days even several years), therefore this can realize relative energy-saving also referred to as bistable state (bistability).
Fig. 2 is the assembling schematic diagram of the liquid crystal indicator of switchable viewing angle in this utility model embodiment, Fig. 3 is the decomposing schematic representation of Fig. 2, please join Fig. 2 and Fig. 3, the liquid crystal indicator of this utility model embodiment includes backlight 10, cholesteric liquid crystal film 20 and display panels 30, and cholesteric liquid crystal film 20 is interposed between backlight 10 and display panels 30.
Backlight 10 is such as side incident type or direct-light-type backlight. In the present embodiment, backlight 10 has the feature of the narrow angle of divergence, for instance the angle of divergence of backlight 10, less than 60 degree, its objective is to allow liquid crystal indicator can obtain narrow visual angle.And when needs wide viewing angle, the Focal conic state of cholesteric liquid crystal is scattered expanding visual angle in recycling cholesteric liquid crystal film 20, obtain wide viewing angle. It addition, there is reflector plate at the back side of backlight 10, with by luminous reflectance to towards display panels 30 outgoing.
Display panels 30 includes opposed thin-film transistor array base-plate 31 (TFTarray) and colored filter substrate 32 (colorfilter, CF) and is interposed in liquid crystal layer 33 (LClayer) between the two. Such as being formed with scanning line and data wire on thin-film transistor array base-plate 31, wherein multi-strip scanning line and a plurality of data lines intersect to arrange and limit multiple pixel regions, are provided with pixel electrode (pixelelectrode) in each pixel region. Colored filter substrate 32 is such as formed the trichroism filter coating of black matrix and red (R), green (G), blue (B). Being provided with thin film transistor (TFT) near the position that scanning line and data wire intersect, each thin film transistor (TFT) includes grid, active layer, source electrode and drain electrode. Thin-film transistor array base-plate 31 or colored filter substrate 32 are additionally provided with public electrode (commonelectrode). Each pixel electrode is by thin film transistor (TFT) control, when thin film transistor (TFT) is opened by scanning line, pixel electrode is charged by data wire in thin film transistor (TFT) opening time, after charging terminates, the voltage of pixel electrode holds up to and charges next time by storing electric capacity (Cs), voltage between pixel electrode and public electrode produces to drive the electric field of liquid crystal molecule deflection, to drive display panels 30 to display.
Fig. 4 is the structural representation of the cholesteric liquid crystal film 20 in Fig. 2, and incorporated by reference to Fig. 4, cholesteric liquid crystal film 20 includes first substrate 21, second substrate 22 and the cholesteric liquid crystal 23 being sealed between first substrate 21 and second substrate 22. First substrate 21 and second substrate 22 are such as glass, quartz, silicon chip or other flexible base board such as plastics, rustless steel etc., in the present embodiment, first substrate 21 and second substrate 22 are flexible base board, make cholesteric liquid crystal film 20 when being arranged between backlight 10 and display panels 30, attach more convenient and laminating is tightr. First substrate 21 is provided with the first electrode 24 in the side near second substrate 22, second substrate 22 is provided with the second electrode 25 in the side near first substrate 21. First electrode 24 and the second electrode 25 are such as whole setting, and are transparent material such as tin indium oxide (ITO), indium zinc oxide (IZO) or aluminum zinc oxide etc. First substrate 21 and second substrate 22 are packaged as a whole by frame glue 26 in edge, and cholesteric liquid crystal 23 is sealed in the box body between first substrate 21 and second substrate 22 by frame glue 26. Cholesteric liquid crystal 23 is such as cholesterol liquid crystal (cholestericliquidcrystal). In the present embodiment, in the box body between first substrate 21 and second substrate 22, it is additionally provided with supporter 27 (spacer), plays the effect supporting two substrates 21,22.
As shown in Figure 5 a, when applying the first voltage (the first voltage is such as high frequency voltage) between the first electrode 24 and second electrode 25 of cholesteric liquid crystal film 20, cholesteric liquid crystal 23 in cholesteric liquid crystal film 20 is in planar transparent state, scattering is there is not when the light of backlight 10 is by cholesteric liquid crystal film 20, liquid crystal indicator can realize narrow visual angle and show, now the angle of divergence of the visual angle of liquid crystal indicator and backlight 10 is quite (namely 60 degree).
As shown in Figure 5 b, when the electric field changed between the first electrode 24 and the second electrode 25, when applying the second voltage (the second voltage is such as low-frequency voltage) between the first electrode 24 and the second electrode 25, cholesteric liquid crystal 23 in cholesteric liquid crystal film 20 is in Jiao's cone scattering states, scattering is there is when the light of backlight 10 is by cholesteric liquid crystal film 20, making the light being incident to display panels 30 occur significantly spreading, liquid crystal indicator can realize wide viewing angle and show.
People are when using various kinds of equipment (such as mobile phone, the panel computer etc.) with this liquid crystal indicator, when the narrow visual angle of needs, only need to be triggered by the mode of button or software set makes cholesteric liquid crystal film 20 be in planar transparent state, when needs wide viewing angle, only need to trigger and make cholesteric liquid crystal film 20 be in burnt cone scattering states, the switching between narrow visual angle and wide viewing angle can be realized.
This utility model embodiment also provides for a kind of view angle switch method of above-mentioned liquid crystal indicator, specifically includes following steps:
Receive the view angle switch control instruction of user's input, this view angle switch control instruction button that can be operated by this liquid crystal indicator for controlling visual angle sends, or sent by software set mode, such as preset " narrow visual angle " and " wide viewing angle " two options in software, user select;
When this view angle switch control instruction is for showing narrow visual angle, to applying the first voltage between the first electrode 24 and the second electrode 25, making the cholesteric liquid crystal 23 in cholesteric liquid crystal film 20 present planar transparent state, this liquid crystal indicator realizes narrow visual angle and shows;
When this view angle switch control instruction is for display wide viewing angle, to applying the second voltage between the first electrode 24 and the second electrode 25, making the cholesteric liquid crystal 23 in cholesteric liquid crystal film 20 present burnt cone scattering states, this liquid crystal indicator realizes wide viewing angle and shows.
The liquid crystal indicator of the switchable viewing angle that the present embodiment provides, by arranging cholesteric liquid crystal film in liquid crystal indicator, utilize the conversion between the clear state and the scattering states of conical texture of planar texture of the cholesteric liquid crystal in cholesteric liquid crystal film, realize liquid crystal indicator switching between narrow visual angle and wide viewing angle to show, the thickness of cholesteric liquid crystal film is little, increase the thickness of liquid crystal indicator hardly, use more convenient during view angle switch, it is achieved cost is relatively low.
The above, it it is only preferred embodiment of the present utility model, not this utility model is done any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but it is not limited to this utility model, any those skilled in the art, without departing within the scope of technical solutions of the utility model, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solutions of the utility model content, any simple modification above example made according to technical spirit of the present utility model, equivalent variations and modification, all still fall within the scope of technical solutions of the utility model.
Claims (9)
1. the liquid crystal indicator of a switchable viewing angle, including backlight (10) and display panels (30), it is characterized in that, this liquid crystal indicator also includes cholesteric liquid crystal film (20), this cholesteric liquid crystal film (20) is interposed between this backlight (10) and this display panels (30), this cholesteric liquid crystal film (20) includes first substrate (21), second substrate (22) and be sealed in the cholesteric liquid crystal (23) between this first substrate (21) and this second substrate (22), this first substrate (21) is provided with the first electrode (24) in the side near this second substrate (22), this second substrate (22) is provided with the second electrode (25) in the side near this first substrate (21), this cholesteric liquid crystal (23) can be made between this first electrode (24) and this second electrode (25) to present planar transparent state or burnt cone scattering states and change the visual angle of this liquid crystal indicator when applying not same electric field.
2. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterized in that, between this first electrode (24) and this second electrode (25) when applying the first voltage, this cholesteric liquid crystal (23) presents planar transparent state and this liquid crystal indicator realizes narrow visual angle and shows; Between this first electrode (24) and this second electrode (25) when applying the second voltage, this cholesteric liquid crystal (23) presents burnt cone scattering states and this liquid crystal indicator realizes wide viewing angle and shows.
3. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterised in that this backlight (10) has the narrow angle of divergence less than 60 degree.
4. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterized in that, this display panels (30) includes opposed thin-film transistor array base-plate (31) and colored filter substrate (32) and the liquid crystal layer (33) being interposed between this thin-film transistor array base-plate (31) and this colored filter substrate (32).
5. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterised in that this first substrate (21) and this second substrate (22) are flexible base board.
6. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterized in that, this first substrate (21) and this second substrate (22) are packaged as a whole by frame glue (26) in edge, and this cholesteric liquid crystal is sealed in the box body between this first substrate (21) and this second substrate (22) by this frame glue (26).
7. the liquid crystal indicator of switchable viewing angle according to claim 6, it is characterised in that be additionally provided with supporter (27) in the box body between this first substrate (21) and this second substrate (22).
8. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterised in that this first electrode (24) and this second electrode (25) are whole setting.
9. the liquid crystal indicator of switchable viewing angle according to claim 1, it is characterised in that this cholesteric liquid crystal (23) is cholesterol liquid crystal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620011719.XU CN205301766U (en) | 2016-01-07 | 2016-01-07 | Liquid crystal disply device at changeable visual angle |
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| CN201620011719.XU CN205301766U (en) | 2016-01-07 | 2016-01-07 | Liquid crystal disply device at changeable visual angle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107466376A (en) * | 2016-12-01 | 2017-12-12 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle and view angle switch method |
| CN108121104A (en) * | 2016-11-30 | 2018-06-05 | 乐金显示有限公司 | Polarizer, its manufacturing method and with its display device |
| CN110534069A (en) * | 2019-08-01 | 2019-12-03 | 昆山龙腾光电股份有限公司 | Display driver circuit, display driving method and liquid crystal display device |
| CN111323975A (en) * | 2020-04-09 | 2020-06-23 | Tcl华星光电技术有限公司 | Optical film with dimming characteristic and manufacturing method thereof |
-
2016
- 2016-01-07 CN CN201620011719.XU patent/CN205301766U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108121104A (en) * | 2016-11-30 | 2018-06-05 | 乐金显示有限公司 | Polarizer, its manufacturing method and with its display device |
| CN108121104B (en) * | 2016-11-30 | 2021-07-27 | 乐金显示有限公司 | Polarizer, method of manufacturing the same, and display device having the same |
| CN107466376A (en) * | 2016-12-01 | 2017-12-12 | 昆山龙腾光电有限公司 | The changeable liquid crystal display device in visual angle and view angle switch method |
| CN107466376B (en) * | 2016-12-01 | 2021-01-15 | 昆山龙腾光电股份有限公司 | Liquid crystal display device with switchable viewing angle and viewing angle switching method |
| US11269204B2 (en) | 2016-12-01 | 2022-03-08 | Infovision Optoelectronics (Kunshan) Co., Ltd. | Viewing angle switchable liquid crystal display device and viewing angle switching method |
| CN110534069A (en) * | 2019-08-01 | 2019-12-03 | 昆山龙腾光电股份有限公司 | Display driver circuit, display driving method and liquid crystal display device |
| CN110534069B (en) * | 2019-08-01 | 2021-09-14 | 昆山龙腾光电股份有限公司 | Display driving circuit, display driving method, and liquid crystal display device |
| CN111323975A (en) * | 2020-04-09 | 2020-06-23 | Tcl华星光电技术有限公司 | Optical film with dimming characteristic and manufacturing method thereof |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |
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