CN103913912B - A kind of display floater and its display control method - Google Patents
A kind of display floater and its display control method Download PDFInfo
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- CN103913912B CN103913912B CN201410125844.9A CN201410125844A CN103913912B CN 103913912 B CN103913912 B CN 103913912B CN 201410125844 A CN201410125844 A CN 201410125844A CN 103913912 B CN103913912 B CN 103913912B
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Abstract
The invention discloses a kind of display floater and its display control method, in the present invention, display floater includes backlight, the first substrate being oppositely arranged and second substrate, and the cholesteric liquid crystal between first substrate and second substrate, also include the first electrically conerolled birefringence ECB liquid crystal cells between cholesteric liquid crystal and backlight, wherein, the backlight launch wavelength incident illumination equal with the pitch of the cholesteric liquid crystal, and incide on the cholesteric liquid crystal through an ECB liquid crystal cells；Liquid crystal molecule in first ECB liquid crystal cells is presented two kinds of arrangement modes under electric field action, one of which arrangement mode make incident illumination after an ECB liquid crystal cells with cholesteric liquid crystal polarity identical polarity, another kind of arrangement mode makes incident illumination after an ECB liquid crystal cells with the polarity contrary with cholesteric liquid crystal polarity.By the present invention, the display control of display floater is capable of achieving without using larger driving voltage, is realized simple.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of display floater and its display control method.
Background technology
Cholesteric liquid crystal has unique bistability, is more and more paid close attention to by people in the industry.
Cholesteric liquid crystal perpendicular TEXTURE STATE under electric field action（Hometropic Texture）, referred to as H states, cholesteric
When phase liquid crystal is in H states, the light for inciding its surface can be wholly transmissive.Cholesteric liquid crystal in the case where electric field is not added with, in flat
Plane texture state（Planar Texture）, referred to as P states, if the light for now having wavelength equal with the pitch of cholesteric liquid crystal is incident
During to cholesteric liquid crystal surface, cholesteric liquid crystal can present selection reflection characteristic, i.e., left-handed cholesteric liquid crystal transmission dextrorotation circle
Polarized light, reflects left circularly polarized light, and the left circularly polarized light of reflection is reflected in the form of right-circularly polarized light；Dextrorotation cholesteric
Phase liquid crystal transmits left circularly polarized light, reflects right-circularly polarized light, and the right-circularly polarized light of reflection is with the shape of left circularly polarized light
Formula is by reflective.
Using the property of above-mentioned cholesteric liquid crystal, cholesteric liquid crystal can be applied in display floater, realize display floater
Colored display.
Fig. 1 constitutes schematic diagram using the display floater of cholesteric liquid crystal in showing prior art, as shown in figure 1, existing
Cholesteric liquid crystal display floater includes lower glass substrate, the cholesteric liquid crystal between upper lower glass substrate and drives gallbladder
The electrode of steroid phase liquid crystal generating state change, and the light absorbing zone for being arranged at non-light incidence side.Cholesteric liquid crystal shown in Fig. 1 shows
When showing that panel realizes that on state of shows, not applied voltage on electrode makes cholesteric liquid crystal in P states, incident light is selected
Reflection, and then reflect from incident side, realize that on state of shows.When cholesteric liquid crystal display floater shown in Fig. 1 realizes that dark-state shows,
To electrode applied voltage, make cholesteric liquid crystal in H states, make the light of incidence wholly transmissive, and absorbed by light absorbing zone, realize dark
State shows.
Existing display floater, needs the change of electrode drive cholesteric liquid crystal generating state realize showing, but gallbladder
The saturation voltage of steroid phase liquid crystal is typically in more than 40V, therefore drives cholesteric liquid crystal to need larger driving voltage, realization to be relatively stranded
It is difficult.
The content of the invention
It is an object of the invention to provide a kind of display floater and its display control method, to realize the cholesteric of low voltage drive
Phase display panels.
The purpose of the present invention is achieved through the following technical solutions：
On the one hand, the invention provides a kind of display floater, including backlight, the first substrate being oppositely arranged and the second base
Plate, and the cholesteric liquid crystal between first substrate and second substrate, are also included positioned at the cholesteric liquid crystal and described
The first electrically conerolled birefringence ECB liquid crystal cells between backlight, wherein,
The backlight launch wavelength incident illumination equal with the pitch of the cholesteric liquid crystal, and through described first
ECB liquid crystal cells are incided on the cholesteric liquid crystal；
Liquid crystal molecule in the first ECB liquid crystal cells is presented two kinds of arrangement modes, one of which row under electric field action
Row mode make the incident illumination after an ECB liquid crystal cells with the cholesteric liquid crystal polarity identical polarisation
Property, another kind of arrangement mode make the incident illumination after an ECB liquid crystal cells with the cholesteric liquid crystal polarisation
The contrary polarity of property.
Display floater provided in an embodiment of the present invention, the wavelength of the incident illumination of backlight transmitting and the pitch of cholesteric liquid crystal
It is equal, therefore cholesteric liquid crystal can be reflected or be transmitted to the light that incides its surface, and arrange in the embodiment of the present invention
There are an ECB liquid crystal cells, the liquid crystal in an ECB liquid crystal cells can be driven by relatively low voltage and realize different arrangement sides
Formula, the liquid crystal of different arrangement modes make have different polarities by the light of an ECB liquid crystal cells, by control in the present invention
The arrangement mode of liquid crystal in first ECB liquid crystal cells, obtains identical with cholesteric liquid crystal polarity or contrary polarized light, coordinates
The selection reflection characteristic of cholesteric liquid crystal, is reflected to incident illumination or is transmitted, and realizes the display function of display floater, is driven
The driving voltage of ECB liquid crystal cells is little for the driving voltage than driving cholesteric liquid crystal, therefore by the present invention without using larger
Driving voltage be capable of achieving the display control of display floater, realize simple.
Preferably, an ECB liquid crystal cells include the first plane-shape electrode, the second plane-shape electrode and are arranged at described
Liquid crystal between one plane-shape electrode and second plane-shape electrode, wherein,
The liquid crystal under the electric field action that first plane-shape electrode and second plane-shape electrode are formed, in the first base
The direction Shang Yan faces arrangement or arranged vertically of plate and second substrate place plane, obtains polarity and cholesteric with more preferable control
The identical or contrary polarized light of phase liquid crystal polarity.
Preferably, the backlight is disposed in proximity to the outside of the substrate of an ECB liquid crystal cells side, with the substrate it
Between have setting spacing, to avoid shading, the whole face of display floater is shown.
Preferably, the display floater also includes first be arranged between the backlight and an ECB liquid crystal cells
Rotatory polarization piece, makes incident illumination all be changed into circularly polarized light, improves the contrast of display floater.
Further, in the present invention, display floater also includes the second rotatory polarization piece, wherein,
The second rotatory polarization piece is arranged at the outside of the substrate for being not provided with backlight side, prevents ambient light from entering and shows
Panel is reflected by cholesteric liquid crystal, declines display quality.
Further, the first rotatory polarization piece is different from the polarity of the second rotatory polarization piece, and the display floater is also
Including the 2nd ECB liquid crystal cells, wherein,
The 2nd ECB liquid crystal cells are located between the cholesteric liquid crystal and the second rotatory polarization piece, so that cholesteric phase
The circularly polarized light of liquid crystal transmission obtains the polarized light as the second rotatory polarization piece polarity after the 2nd ECB liquid crystal cells, real
Existing on state of shows.
On the other hand, the embodiment of the present invention provides a kind of display control method, and the display control method is applied to above-mentioned relating to
And display floater, including：
The control backlight launch wavelength incident illumination equal with cholesteric liquid crystal pitch；
The liquid crystal in the first electrically conerolled birefringence ECB liquid crystal cells is controlled in particular arrangement mode, the incident illumination is made with polarisation
Property the form mutually contrary with the cholesteric liquid crystal polarity incide on cholesteric liquid crystal, realize that the on state of of display floater shows
Show；Or
The liquid crystal in the first electrically conerolled birefringence ECB liquid crystal cells is controlled in particular arrangement mode, the incident illumination is made with polarisation
Property is incided on cholesteric liquid crystal with the cholesteric liquid crystal polarity identical form, realizes that the dark-state of display floater shows.
Display control method provided in an embodiment of the present invention, controls the wavelength and cholesteric phase liquid of the incident illumination of backlight transmitting
Brilliant pitch is equal, therefore cholesteric liquid crystal can be reflected or be transmitted to the light that incides its surface, and the present invention is implemented
An ECB liquid crystal cells are provided with example, the liquid crystal in an ECB liquid crystal cells can be realized different by relatively low voltage driving
Arrangement mode, the liquid crystal of different arrangement modes make have different polarities by the light of an ECB liquid crystal cells, lead in the present invention
The arrangement mode of liquid crystal in the first ECB liquid crystal cells of control is crossed, identical with cholesteric liquid crystal polarity or contrary polarization is obtained
Light, coordinates the selection reflection characteristic of cholesteric liquid crystal, incident illumination is reflected or is transmitted, realize the display work(of display floater
Can, drive the driving voltage of ECB liquid crystal cells than drive cholesteric liquid crystal driving voltage for it is little, therefore need not be made by the present invention
The display control of display floater is capable of achieving with larger driving voltage, is realized simple.
Preferably, make the incident illumination being entered with the polarity form identical or contrary with the cholesteric liquid crystal polarity
Before being mapped on cholesteric liquid crystal, the method also includes：
By the first rotatory polarization piece, the light that backlight is launched is become into identical with cholesteric liquid crystal polarity or contrary circle
Polarized light, makes incident illumination be changed into circularly polarized light, and raising is displayed contrast.
Preferably, control the first ECB liquid crystal cells in liquid crystal be in particular arrangement mode, make the incident illumination with polarity with
The contrary form of the cholesteric liquid crystal polarity is incided on cholesteric liquid crystal, realizes the mistake that the on state of of display floater shows
Journey, specifically includes：
The liquid crystal molecule controlled in an ECB liquid crystal cells is arranged vertically, makes the circle contrary with cholesteric liquid crystal polarity inclined
The light that shakes does not change phase place and is directly incident on cholesteric liquid crystal；Or the liquid crystal molecule in the first ECB liquid crystal cells of control prolongs face row
Row, are made to be produced after the Phase delay of λ/2 with cholesteric liquid crystal polarity identical circularly polarized light, are obtained and cholesteric liquid crystal polarity
Contrary circularly polarized light, incides on cholesteric liquid crystal；
The cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, realizes that the on state of of display floater shows.
By the arrangement mode of liquid crystal molecule in the first ECB liquid crystal cells of control in the embodiment of the present invention, can be simply real
Now the polarity polarized light contrary with cholesteric liquid crystal polarity is incided on cholesteric liquid crystal, is transmitted by cholesteric liquid crystal,
Realize that the on state of of display floater shows.
Preferably, the display floater includes the second rotatory polarization pieces different from the polarity of the first rotatory polarization piece, Yi Ji
Two ECB liquid crystal cells, wherein,
After the cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, the method also includes：
Control the liquid crystal molecule in the 2nd ECB liquid crystal cells and prolong face arrangement, make the circular polarization transmitted by the cholesteric liquid crystal
Light produces λ/2 Phase delay, obtains and the second rotatory polarization piece polarity identical circularly polarized light.
By the arrangement mode of liquid crystal molecule in the first ECB liquid crystal cells of control in the embodiment of the present invention, can be simply real
Now polarity and cholesteric liquid crystal polarity identical polarized light are incided on cholesteric liquid crystal, are reflected by cholesteric liquid crystal,
Realize that the dark-state of display floater shows, and drive cholesteric liquid crystal to be changed into H states without the need for larger driving voltage and realize dark-state, realize
Simply.
Further, the liquid crystal controlled in an ECB liquid crystal cells is in particular arrangement mode, makes the incident illumination with polarity
Incide on cholesteric liquid crystal with the cholesteric liquid crystal polarity identical form, realize the mistake that the dark-state of display floater shows
Journey, specifically includes：
Control the liquid crystal molecule in an ECB liquid crystal cells and prolong face arrangement, make the circle contrary with cholesteric liquid crystal polarity inclined
The light that shakes produces λ/2 Phase delay, obtains polarity with cholesteric liquid crystal polarity identical circularly polarized light and incides the gallbladder
On steroid phase liquid crystal；Or the liquid crystal molecule in the first ECB liquid crystal cells of control is arranged vertically, makes polarity and cholesteric liquid crystal polarisation
Property identical circularly polarized light is incided on the cholesteric liquid crystal；
The cholesteric liquid crystal reflection and its polarity identical circularly polarized light, prevent light from through the cholesteric phase liquid
Crystalline substance, realizes that the dark-state of display floater shows.
The display control method of cholesteric liquid crystal display floater provided in an embodiment of the present invention, controls entering for backlight transmitting
The wavelength for penetrating light is equal with the pitch of cholesteric liquid crystal, thus cholesteric liquid crystal the light that incides its surface can be reflected or
Transmission, and an ECB liquid crystal cells and/or the 2nd ECB liquid crystal cells in the embodiment of the present invention, are provided with, by controlling an ECB
Liquid crystal cell and/or the 2nd ECB liquid crystal cells are in different on off states so that the liquid crystal in ECB liquid crystal cells can pass through relatively low
Voltage drive and realize different arrangement modes, the liquid crystal of different arrangement modes makes to have by the light of ECB liquid crystal cells different
Phase place, coordinates the selection reflection characteristic of cholesteric liquid crystal, you can realize the display function of display floater, without using larger drive
Galvanic electricity pressure drives, and realizes simple.
Description of the drawings
Fig. 1 constitutes schematic diagram for the display floater in prior art using cholesteric liquid crystal；
Fig. 2 is that display floater provided in an embodiment of the present invention constitutes schematic diagram；
Fig. 3 A- Fig. 3 B are ECB liquid crystal cells liquid crystal molecule arrangement mode schematic diagram provided in an embodiment of the present invention；
Fig. 4 constitutes schematic diagram for another display floater provided in an embodiment of the present invention；
Fig. 5 is the composition schematic diagram of another display floater provided in an embodiment of the present invention；
Fig. 6 A- Fig. 6 B are dextrorotation rotatory polarization piece composition schematic diagram provided in an embodiment of the present invention;
Fig. 7 A- Fig. 7 B are the composition schematic diagram of left-handed rotatory polarization piece provided in an embodiment of the present invention；
Fig. 8 is that display floater provided in an embodiment of the present invention constitutes schematic diagram；
Fig. 9 A realize on state of display control process schematic for provided in an embodiment of the present invention；
Fig. 9 B realize dark-state display control process schematic for provided in an embodiment of the present invention；
Figure 10 is the another schematic diagram for realizing on state of display control process provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, is not whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 2 show display floater provided in an embodiment of the present invention and constitutes schematic diagram, as shown in Fig. 2 the display floater bag
Include first substrate, second substrate, the backlight 1 on the outside of substrate, and the gallbladder between first substrate and second substrate
Steroid phase liquid crystal 3, also includes the ECB liquid crystal cells 2 between cholesteric liquid crystal and backlight.
ECB（Electronically controlled birefringence, electrically conerolled birefringence）Base is located in liquid crystal cell
Liquid crystal molecule between plate is easy to specific arrangement mode is presented under electric field action, when light is through there is particular arrangement mode
Phase place change can be produced during liquid crystal molecule, in the embodiment of the present invention, a kind of cholesteric liquid crystal display surface is designed using ECB liquid crystal cells
Plate, by driving ECB liquid crystal cells, the liquid crystal molecule controlled in ECB liquid crystal cells produces different arrangement modes, makes through ECB liquid
The light phase of brilliant box changes, and obtains identical with cholesteric liquid crystal polarity or contrary polarized light, and utilizes cholesteric
The selection reflection characteristic of phase liquid crystal, realizes the display control of cholesteric liquid crystal display floater, without the need for larger driving voltage.
As shown in Fig. 2 backlight 1 is divided into an ECB liquid crystal cells 2 with cholesteric liquid crystal 3 and prolongs face in the embodiment of the present invention
Two sides on direction；1 launch wavelength of the backlight incident illumination equal with the pitch of cholesteric liquid crystal, and through an ECB liquid
Brilliant box 2 is incided on cholesteric liquid crystal 3；Liquid crystal in first ECB liquid crystal cells 2 is presented two kinds of arrangement modes under electric field action,
One of which arrangement mode make incident illumination after an ECB liquid crystal cells 2 with 3 polarity identical polarisation of cholesteric liquid crystal
Property, another kind of arrangement mode make incident illumination after an ECB liquid crystal cells 2 with contrary with 3 polarity of cholesteric liquid crystal inclined
Photosensitiveness, so make cholesteric liquid crystal present select reflection characteristic, to reflecting with its polarity identical incident illumination, to its
The contrary incident illumination of polarity is transmitted, and then realizes the display control of cholesteric liquid crystal display floater, without the need for larger drive
Galvanic electricity pressure.
Preferably, an ECB liquid crystal cells 2 in the embodiment of the present invention, be provided between upper and lower base plate the first plane-shape electrode,
Second plane-shape electrode and the liquid crystal being arranged between the first plane-shape electrode and the second plane-shape electrode.In the embodiment of the present invention
Electrode in one ECB liquid crystal cells 2 selects plane-shape electrode, can form uniform electric field in the whole face of display floater, making
Light phase change in display floater everywhere is close to equal, brightness uniformity, further, the is arranged in the embodiment of the present invention
The electric field action that liquid crystal between one plane-shape electrode and the second plane-shape electrode is formed in the first plane-shape electrode and the second plane-shape electrode
Lower is in prolong face arrangement or arranged vertically, so that light can produce λ/2 Phase delay, left-hand polarization light is changed into dextrorotation by realization
Polarized light, right-handed polarized light are changed into left-hand polarization light.
It should be noted that what is be related in the embodiment of the present invention prolongs face arrangement or arranged vertically, be with first substrate and
On the basis of the in-plane that second substrate is located.
Specifically, the liquid crystal being arranged in the embodiment of the present invention between the first plane-shape electrode and the second plane-shape electrode can be
Positivity liquid crystal, or negative liquid crystal, it is following in the embodiment of the present invention to illustrate by taking positivity liquid crystal as an example.The present invention is implemented
To ECB liquid crystal cell applied voltages in example, ECB liquid crystal cells are in ON state, as shown in Figure 3A, in the ECB liquid crystal cells of ON state
Liquid crystal molecule is arranged vertically, when ECB liquid crystal cell of the light by ON state, does not change the polarization state of light；ECB liquid crystal cells are not applied
Power-up pole, ECB liquid crystal cells are in OFF state, and as shown in Figure 3 B, the liquid crystal molecule in the ECB liquid crystal cells of OFF state is arranged along face,
When ECB liquid crystal cell of the light light by OFF state, Phase delay can be produced, such that it is able to change the polarization state of light.
In the embodiment of the present invention, cholesteric liquid crystal 3 is planar texture state, in wavelength and the cholesteric liquid crystal of incident illumination
When pitch is equal, cholesteric liquid crystal can present selection reflection characteristic, i.e., left-handed cholesteric liquid crystal transmits right-circularly polarized light, instead
Left circularly polarized light is penetrated, the left circularly polarized light of reflection is reflected in the form of right-circularly polarized light；Dextrorotation cholesteric liquid crystal is saturating
Left circularly polarized light is penetrated, right-circularly polarized light is reflected, the right-circularly polarized light of reflection is reflected in the form of left circularly polarized light.
Therefore, specific backlight can be set in the embodiment of the present invention, makes backlight launch the incidence equal with cholesteric liquid crystal wavelength
Light, and then allow cholesteric liquid crystal to transmit or reflect the light that backlight is launched, realize one side on state of or
Dark-state shows, and for other light in addition to the light equal with its pitch can realize two-sided Transparence Display with wholly transmissive.
Further, in the embodiment of the present invention, backlight 1 can be arranged on the front of display floater, it is also possible to be arranged on aobvious
Show that the back side of panel, i.e. backlight 1 can be arranged on the side of first substrate, it is also possible to be arranged on the side of second substrate.This
When backlight 1 is arranged on first substrate side in inventive embodiments, there is between first substrate the spacing of setting, backlight 1
When being arranged on second substrate side, there is between second substrate the spacing of setting.
There is between backlight and substrate in the embodiment of the present invention spacing of setting, rather than the side for being attached at display floater
On substrate, display floater will not be blocked so that Transparence Display can be realized in the whole face of display floater.
Preferably, the first rotatory polarization piece 4, the first rotatory polarization piece are additionally provided with the embodiment of the present invention in display floater
4 are arranged between an ECB liquid crystal cells 2 and backlight 1, as shown in Figure 4.In the embodiment of the present invention, the first rotatory polarization piece 4 is arranged
Between an ECB liquid crystal cells 2 and backlight 1, and polarity can be identical with the polarity of cholesteric liquid crystal 3, it is also possible to
With the polarity of cholesteric liquid crystal 3 conversely, the light of the transmitting of backlight 1 can be formed and cholesteric phase after the first rotatory polarization piece 4
The identical or contrary circularly polarized light of 3 polarity of liquid crystal, preferably can be reflected or be transmitted by cholesteric liquid crystal.
Further, the display floater for providing in the embodiment of the present invention also includes the second rotatory polarization piece 5, as shown in figure 5, should
Second rotatory polarization piece 5 is arranged on the side of the substrate for being not provided with backlight, therefore when there is ambient light to incide in display floater, the
Two rotatory polarization pieces 5 can prevent cholesteric liquid crystal to anti-by cholesteric liquid crystal 3 from the incident ambient light in 5 side of the second rotatory polarization piece
Penetrate, to improve the display quality of display floater.
It should be noted that in Fig. 4 and Fig. 5, the first rotatory polarization piece 4 and the second rotatory polarization piece 5 are arranged in the embodiment of the present invention
In the outside of substrate, simply schematically illustrated, if conditions permit can also be arranged on the outside of substrate.
In the embodiment of the present invention, the second rotatory polarization piece 5 can be with identical with the polarity of the first rotatory polarization piece 4, it is also possible to phase
Instead, i.e., in the embodiment of the present invention, the first rotatory polarization piece 4 and the second rotatory polarization piece 5 can be all left-handed rotatory polarization piece or be all dextrorotation circle
Polaroid, can also be that one of them is left-handed rotatory polarization piece, and another is dextrorotation rotatory polarization piece.It is left-handed in the embodiment of the present invention
Rotatory polarization piece and dextrorotation rotatory polarization piece can be realized using line polarisation piece and (λ/4) slide, as shown in Figure 6 A and 6 B, be this
The dextrorotation rotatory polarization piece composition schematic diagram that bright embodiment is provided, Fig. 7 A and Fig. 7 B show left-handed circle provided in an embodiment of the present invention
The composition schematic diagram of polaroid.
If in the embodiment of the present invention, the second rotatory polarization piece 5 is identical with the polarity of the first rotatory polarization piece 4, by cholesteric phase liquid
The circularly polarized light of brilliant transmission then can directly pass through the second rotatory polarization piece 5, realize that on state of shows, if the second rotatory polarization piece 5 and first
The polarity of rotatory polarization piece 4 is different, then will be unable to pass through by the circularly polarized light that cholesteric liquid crystal is transmitted, therefore, the present invention is implemented
Example provides another kind of display floater, as shown in figure 8, the display floater also includes being arranged at the second rotatory polarization piece 5 and cholesteric phase liquid
The 2nd ECB liquid crystal cells 6 between crystalline substance, by the arrangement mode for controlling liquid crystal molecule in the 2nd ECB liquid crystal cells 6, the cholesteric phase for making
The circularly polarized light of liquid crystal transmission after the 2nd ECB liquid crystal cells 6 becomes to polarize with 5 polarity identical of the second rotatory polarization piece
Light so as to can realize that on state of shows by the second rotatory polarization piece 5.
It should be noted that the accompanying drawing in the embodiment of the present invention is all carried out so that ECB liquid crystal cells are arranged on the inside of substrate as an example
Illustrate, if conditions permit, ECB liquid crystal cells can also be arranged on the outside of substrate.
Cholesteric liquid crystal display floater provided in an embodiment of the present invention, the wavelength and cholesteric phase of the incident illumination of backlight transmitting
The pitch of liquid crystal is equal, therefore cholesteric liquid crystal can be reflected or be transmitted to the light that incides its surface, and the present invention is real
An ECB liquid crystal cells and the 2nd ECB liquid crystal cells are provided with applying example, the liquid crystal in ECB liquid crystal cells can pass through relatively low voltage
Different arrangement modes are realized in driving, and the liquid crystal of different arrangement modes makes have different phase places by the light of ECB liquid crystal cells, matches somebody with somebody
Close the selection reflection characteristic of cholesteric liquid crystal, you can realize the display function of display floater, without using larger driving voltage
Drive, realize simple.
Based on the display floater of above-mentioned offer, the embodiment of the present invention additionally provides a kind of display control method, and the present invention is real
The display control method of example offer is applied, as cholesteric liquid crystal can be carried out to other light in addition to the light equal with its pitch
Completely through, and then Transparence Display can be realized, therefore the process of Transparence Display is no longer described in detail, the present invention is implemented
With regard to display floater, example realizes that the process that dark-state shows and on state of shows is described in detail.
Specifically, the launch wavelength incidence equal with cholesteric liquid crystal pitch in controlling back light source in the embodiment of the present invention
Light；The liquid crystal in an ECB liquid crystal cells is controlled in particular arrangement mode, it is inclined with the cholesteric liquid crystal with polarity to make incident illumination
The mutually contrary form of photosensitiveness is incided on cholesteric liquid crystal, realizes that the on state of of display floater shows；Or the first ECB liquid crystal of control
Liquid crystal in box is in particular arrangement mode, makes incident illumination with polarity and cholesteric liquid crystal polarity identical form and incides gallbladder
On steroid phase liquid crystal, realize that the dark-state of display floater shows.
Further, when in the embodiment of the present invention using the display floater with the first rotatory polarization piece shown in Fig. 4, can lead to
Cross the first rotatory polarization piece and the light that backlight is launched is become into circularly polarized light, so that cholesteric liquid crystal pair and the circle for inciding its surface
Polarized light can carry out preferably reflecting or transmiting.
Specifically, realize to display floater in the embodiment of the present invention that the control process that on state of shows can be in the following way：
The liquid crystal molecule controlled in an ECB liquid crystal cells is arranged vertically, makes the circle contrary with cholesteric liquid crystal polarity inclined
The light that shakes does not change phase place and is directly incident on cholesteric liquid crystal；Or the liquid crystal molecule in the first ECB liquid crystal cells of control prolongs face row
Row, are made to be produced after the Phase delay of λ/2 with cholesteric liquid crystal polarity identical circularly polarized light, are obtained and cholesteric liquid crystal polarity
Contrary circularly polarized light, incides on cholesteric liquid crystal；Cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, realizes
The on state of of display floater shows.
Specifically, in the embodiment of the present invention by taking the display panel structure shown in Fig. 5 as an example, display floater is realized on state of and
Dark-state realizes that process is illustrated.
The first rotatory polarization piece is assumed for dextrorotation rotatory polarization piece, the second rotatory polarization piece is dextrorotation rotatory polarization piece, cholesteric liquid crystal
To illustrate as a example by left-handed cholesteric liquid crystal, for the first rotatory polarization piece is left-handed rotatory polarization piece, the second rotatory polarization piece is left
Rounding polaroid, cholesteric liquid crystal realize the similar process that on state of and dark-state show for dextrorotation cholesteric liquid crystal, and here is no longer gone to live in the household of one's in-laws on getting married
State.
On state of realizes process
As shown in Figure 9 A, ON state is to an ECB liquid crystal cell applied voltages, then the polarization state of light changes process
Dextrorotation can be represented in Fig. 9 A counterclockwise, is represented clockwise left-handed as shown in Figure 9 A.
Specifically, in the embodiment of the present invention backlight transmitting light when the first rotatory polarization piece, the first rotatory polarization piece
For dextrorotation rotatory polarization piece, therefore the light of backlight becomes right-circularly polarized light, and right-circularly polarized light is through first in ON state
During ECB liquid crystal cells, due to liquid crystal molecule it is arranged vertically, so right-circularly polarized light after an ECB liquid crystal cells still be dextrorotation
Circularly polarized light, can be transmitted by left-handed cholesteric liquid crystal when right-circularly polarized light is incided on left-handed cholesteric liquid crystal, finally with the right side
The form of rounding polarization state is by left-handed cholesteric liquid crystal, and the second rotatory polarization piece is dextrorotation rotatory polarization piece, therefore by left-handed cholesteric
The right-circularly polarized light of phase liquid crystal transmission can be by projecting from the second rotatory polarization piece, so as to realize in the second rotatory polarization piece side
On state of shows.
Certainly, if backlight is arranged on the second rotatory polarization piece side, according to the reversibility of light, in the first polaroid side
Can equally realize that on state of shows, its concrete principle is as noted above, will not be described here.
Dark-state realizes process
As shown in Figure 9 B, an ECB liquid crystal cells are controlled and is in OFF state, then the polarization state change process of light can be such as Fig. 9 B institutes
Show, Fig. 9 B6 represent dextrorotation counterclockwise, represent left-handed clockwise.
Specifically, when the first rotatory polarization piece, the first rotatory polarization piece is the light that backlight is launched in the embodiment of the present invention
Dextrorotation rotatory polarization piece, therefore the light of backlight becomes right-circularly polarized light, and right-circularly polarized light is through the ECB in OFF state
During liquid crystal cell, as liquid crystal molecule prolongs face arrangement, therefore right-circularly polarized light becomes left circularly polarized light, and left circularly polarized light is incident
During on left-handed cholesteric liquid crystal, it is impossible to by left-handed cholesteric liquid crystal, can be reflected by left-handed cholesteric liquid crystal, final light is
Cholesteric liquid crystal is can't pass, therefore can not realize that dark-state show in the second rotatory polarization piece side by the second rotatory polarization piece.
Certainly, if backlight is arranged on the second rotatory polarization piece side, can equally realize that the first rotatory polarization piece side is in
Existing dark-state, specifically repeats no more.
Further, if the first rotatory polarization piece is different from the polarity of the second rotatory polarization piece in the embodiment of the present invention, i.e.,
Using the display panel structure shown in Fig. 8, for the process that dark-state is realized is realized secretly with the display panel structure shown in above-mentioned Fig. 5
Process that state shows is similar to, and will not be described here, for realizing that the process that on state of shows then see shown in Figure 10.
One first rotatory polarization piece of the embodiment of the present invention is dextrorotation rotatory polarization piece, and the second rotatory polarization piece is left-handed rotatory polarization piece,
To illustrate as a example by left-handed cholesteric liquid crystal, for the first rotatory polarization piece is left-handed rotatory polarization piece, second justifies cholesteric liquid crystal
Polaroid is dextrorotation rotatory polarization piece, and cholesteric liquid crystal is realized similar process for dextrorotation cholesteric liquid crystal, be will not be described here.
Specifically, during on state of as shown in Figure 10 is realized, the incident light of backlight incides quilt on cholesteric liquid crystal
The process of cholesteric liquid crystal transmission, see Fig. 9 A, after cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, this
Liquid crystal molecule of the 2nd ECB liquid crystal cells in OFF state, i.e. the 2nd ECB liquid crystal cells is can control in inventive embodiments and prolongs face arrangement,
Make the circularly polarized light transmitted by cholesteric liquid crystal produce λ/2 Phase delay, obtain justifying with the second rotatory polarization piece polarity identical
The right-circularly polarized light transmitted by left-handed cholesteric liquid crystal in polarized light, the i.e. embodiment of the present invention, through second in OFF state
After ECB liquid crystal cells, it is changed into left circularly polarized light, through the second circularly polarized light, left circularly polarized light can realize that on state of shows.
The display control method of cholesteric liquid crystal display floater provided in an embodiment of the present invention, controls entering for backlight transmitting
The wavelength for penetrating light is equal with the pitch of cholesteric liquid crystal, thus cholesteric liquid crystal the light that incides its surface can be reflected or
Transmission, and an ECB liquid crystal cells and/or the 2nd ECB liquid crystal cells in the embodiment of the present invention, are provided with, by controlling an ECB
Liquid crystal cell and/or the 2nd ECB liquid crystal cells are in different on off states so that the liquid crystal in ECB liquid crystal cells can pass through relatively low
Voltage drive and realize different arrangement modes, the liquid crystal of different arrangement modes makes to have by the light of ECB liquid crystal cells different
Phase place, coordinates the selection reflection characteristic of cholesteric liquid crystal, you can realize the display function of display floater, without using larger drive
Galvanic electricity pressure drives, and realizes simple.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention
God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (10)
1. a kind of display floater, including backlight, the first substrate being oppositely arranged and second substrate, and be located at first substrate and
Cholesteric liquid crystal between second substrate, it is characterised in that also include between the cholesteric liquid crystal and the backlight
The first electrically conerolled birefringence ECB liquid crystal cells, wherein,
The backlight launch wavelength incident illumination equal with the pitch of the cholesteric liquid crystal, and through an ECB liquid
Brilliant box is incided on the cholesteric liquid crystal；
Liquid crystal molecule in the first ECB liquid crystal cells is presented two kinds of arrangement modes, one of which arrangement side under electric field action
Formula make the incident illumination after an ECB liquid crystal cells with the cholesteric liquid crystal polarity identical polarity,
Another kind of arrangement mode make the incident illumination after an ECB liquid crystal cells with the cholesteric liquid crystal polarity phase
Anti- polarity；
Also include the second rotatory polarization piece,
The second rotatory polarization piece is arranged at the outside of the substrate for being not provided with backlight side.
2. display floater as claimed in claim 1, it is characterised in that an ECB liquid crystal cells include the first plane-shape electrode,
Second plane-shape electrode and the liquid crystal being arranged between first plane-shape electrode and second plane-shape electrode, wherein,
The liquid crystal under the electric field action that first plane-shape electrode and second plane-shape electrode are formed, in first substrate and
The direction Shang Yan faces arrangement or arranged vertically of second substrate place plane.
3. display floater as claimed in claim 1, it is characterised in that
The backlight is disposed in proximity to the outside of the substrate of an ECB liquid crystal cells side, has setting between the substrate
Spacing.
4. the display floater as described in any one of claim 1-3, it is characterised in that also including being arranged at the backlight and institute
State the first rotatory polarization piece between an ECB liquid crystal cells.
5. display floater as claimed in claim 4, it is characterised in that the first rotatory polarization piece and the second rotatory polarization piece
Polarity it is different, the display floater also includes the 2nd ECB liquid crystal cells, wherein,
The 2nd ECB liquid crystal cells are located between the cholesteric liquid crystal and the second rotatory polarization piece.
6. a kind of display control method, the display floater being applied to described in any one of claim 1-5, it is characterised in that include：
The control backlight launch wavelength incident illumination equal with cholesteric liquid crystal pitch；
Liquid crystal in the first electrically conerolled birefringence ECB liquid crystal cells is controlled in particular arrangement mode, make the incident illumination with polarity with
The mutually contrary form of the cholesteric liquid crystal polarity is incided on cholesteric liquid crystal, realizes that the on state of of display floater shows；Or
Person
Liquid crystal in the first electrically conerolled birefringence ECB liquid crystal cells is controlled in particular arrangement mode, make the incident illumination with polarity with
The cholesteric liquid crystal polarity identical form is incided on cholesteric liquid crystal, realizes that the dark-state of display floater shows.
7. method as claimed in claim 6, it is characterised in that it is inclined with the cholesteric liquid crystal with polarity to make the incident illumination
Before the identical or contrary form of photosensitiveness is incided on cholesteric liquid crystal, the method also includes：
By the first rotatory polarization piece, the light that backlight is launched is become into identical with cholesteric liquid crystal polarity or contrary circular polarization
Light.
8. method as claimed in claim 7, it is characterised in that the liquid crystal in the first ECB liquid crystal cells of control is in particular arrangement side
Formula, is made the incident illumination and is incided on cholesteric liquid crystal with the polarity form contrary with the cholesteric liquid crystal polarity, real
The process that the on state of of existing display floater shows, specifically includes：
The liquid crystal molecule controlled in an ECB liquid crystal cells is arranged vertically, makes the circularly polarized light contrary with cholesteric liquid crystal polarity
Do not change phase place to be directly incident on cholesteric liquid crystal；Or the liquid crystal molecule in the first ECB liquid crystal cells of control prolongs face arrangement, makes
Produce after the Phase delay of λ/2 with cholesteric liquid crystal polarity identical circularly polarized light, obtain contrary with cholesteric liquid crystal polarity
Circularly polarized light, incide on cholesteric liquid crystal；
The cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, realizes that the on state of of display floater shows.
9. method as claimed in claim 8, it is characterised in that the display floater is included with the polarity of the first rotatory polarization piece not
The second same rotatory polarization piece, and the 2nd ECB liquid crystal cells, wherein,
After the cholesteric liquid crystal transmits the circularly polarized light contrary with its polarity, the method also includes：
Control the liquid crystal molecule in the 2nd ECB liquid crystal cells and prolong face arrangement, produce the circularly polarized light transmitted by the cholesteric liquid crystal
Raw λ/2 Phase delay, obtains and the second rotatory polarization piece polarity identical circularly polarized light.
10. method as claimed in claim 6, it is characterised in that the liquid crystal in the first ECB liquid crystal cells of control is in particular arrangement side
Formula, is made the incident illumination and is incided on cholesteric liquid crystal with the cholesteric liquid crystal polarity identical form with polarity, real
The process that the dark-state of existing display floater shows, specifically includes：
Control the liquid crystal molecule in an ECB liquid crystal cells and prolong face arrangement, make the circularly polarized light contrary with cholesteric liquid crystal polarity
λ/2 Phase delay is produced, and polarity is obtained with cholesteric liquid crystal polarity identical circularly polarized light and is incided the cholesteric phase
On liquid crystal；Or the liquid crystal molecule in the first ECB liquid crystal cells of control is arranged vertically, makes polarity with cholesteric liquid crystal polarity phase
Same circularly polarized light is incided on the cholesteric liquid crystal；
The cholesteric liquid crystal reflection and its polarity identical circularly polarized light, prevent light from passing through the cholesteric liquid crystal,
Realize that the dark-state of display floater shows.
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| CN104749811B (en) * | 2015-04-21 | 2018-09-21 | 京东方科技集团股份有限公司 | A kind of liquid crystal display panel and display device |
| CN108054185A (en) * | 2017-12-12 | 2018-05-18 | 武汉华星光电半导体显示技术有限公司 | Oled display device and display device |
| CN109814316B (en) * | 2019-03-08 | 2022-04-12 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| US20220163828A1 (en) * | 2020-11-25 | 2022-05-26 | Innolux Corporation | Electronic device |
| TWI776576B (en) * | 2021-07-02 | 2022-09-01 | 友達光電股份有限公司 | Display device |
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