CN110088671A - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
- Publication number
- CN110088671A CN110088671A CN201780078591.6A CN201780078591A CN110088671A CN 110088671 A CN110088671 A CN 110088671A CN 201780078591 A CN201780078591 A CN 201780078591A CN 110088671 A CN110088671 A CN 110088671A
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- Prior art keywords
- liquid crystal
- mentioned
- light
- display panel
- reflection
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
Abstract
There is provided a kind of liquid crystal display panel, wherein the deformation of the reflection image of reflective condition reduces.Liquid crystal display panel (100) corresponds to the application of voltage, switches between transmissive state and reflective condition.Liquid crystal display panel (100) includes: absorption-type polarizing film (21), which is set to the side of liquid crystal cell (10) via the 1st clear adhesive film (31)；Reflection type polarizer (22), the reflection type polarizer (22) are set to the other side of liquid crystal cell (10) via the 2nd clear adhesive film (32).In reflective condition, it is injected from absorption-type polarizing film (21) side, from the light for the polarization axle that the light transmitted in liquid crystal cell (10) is the axis of reflection along reflection type polarizer (22), reflected by reflection type polarizer (22).In transmissive state, it is injected from absorption-type polarizing film (21) side, from the light for the polarization axle that the light transmitted in liquid crystal cell (10) is the axis of homology to intersect along the axis of reflection with reflection type polarizer (22), from transmission in reflection type polarizer (22), the uneven amounts of absolute value of the film thickness of the 2nd clear adhesive film (32) is 0.5 μm or less.
Description
Technical field
The present invention relates to liquid crystal display panels.
Background technique
In patent document 1, a kind of liquid crystal display panel is disclosed comprising: the liquid crystal layer being sealed between a pair of of substrate；Folder
The absorption-type polarizing film positioned to substrate and reflection type polarizer are held, which can be in transmissive state and specular state
Switch between (reflective condition).The liquid crystal display panel of patent document 1 can recognize the object for being located at behind (in the patent in transmissive state
It is image displaying part in document).
Existing technical literature
Patent document
Patent document 1:JP speciallys permit No. 3419766 bulletin
Summary of the invention
Subject to be solved by the invention
In this liquid crystal display panel, polarizing film is pasted on the substrate for being sealed with liquid crystal via clear adhesive film, but
It is due to the membrane thickness unevenness of clear adhesive film, therefore there is the problem of deformation of the reflection image of reflective condition occurs significantly.
It is proposed the present invention be directed to above-mentioned actual conditions, the object of the present invention is to provide a kind of liquid crystal display panel,
The deformation of its reflection image that can reduce reflective condition.
A technical solution to solve project
To achieve the goals above, the liquid crystal display panel of the 1st aspect of the invention is related to the application corresponding to voltage, is transmiting
The liquid crystal display panel switched between state and reflective condition, which is characterized in that the liquid crystal display panel includes:
Liquid crystal cell, the liquid crystal cell include liquid crystal layer and the transparent electricity for applying above-mentioned voltage on the liquid crystal layer
Pole；
Absorption-type polarizing film, the absorption-type polarizing film are set to the one of above-mentioned liquid crystal cell via the 1st clear adhesive film
Side；
Reflection type polarizer, the reflection type polarizer are set to the another of above-mentioned liquid crystal cell via the 2nd clear adhesive film
Side is faced in a manner of clamping above-mentioned liquid crystal cell with above-mentioned absorption-type polarizing film；
In above-mentioned reflective condition, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is
Along the light of the polarization axle of the axis of reflection of above-mentioned reflection type polarizer, reflected by above-mentioned reflection type polarizer；
In above-mentioned transmissive state, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is
The light of the polarization axle of the axis of homology to intersect along the axis of reflection with above-mentioned reflection type polarizer, from above-mentioned reflection type polarizer thoroughly
It penetrates；
The uneven amounts of absolute value of the film thickness of above-mentioned 2nd clear adhesive film is 0.5 μm or less.
To achieve the goals above, the liquid crystal display panel of the 2nd aspect of the invention is related to the application corresponding to voltage, is transmiting
The liquid crystal display panel switched between state and reflective condition, which is characterized in that the liquid crystal display panel includes:
Liquid crystal cell, the liquid crystal cell include liquid crystal layer and the transparent electricity for applying above-mentioned voltage on the liquid crystal layer
Pole；
Absorption-type polarizing film, the absorption-type polarizing film are set to the one of above-mentioned liquid crystal cell via the 1st clear adhesive film
Side；
Reflection type polarizer, the reflection type polarizer are set to the another of above-mentioned liquid crystal cell via the 2nd clear adhesive film
Side is faced in a manner of clamping above-mentioned liquid crystal cell with above-mentioned absorption-type polarizing film；
In above-mentioned reflective condition, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is
Along the light of the polarization axle of the axis of reflection of above-mentioned reflection type polarizer, reflected by above-mentioned reflection type polarizer；
In above-mentioned transmissive state, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is
The light of the polarization axle of the axis of homology to intersect along the axis of reflection with above-mentioned reflection type polarizer, from above-mentioned reflection type polarizer thoroughly
It penetrates；
In above-mentioned reflective condition, the picture vividness (specification for meeting JIS:K7374) for the occasion that light is injected with 45 degree is full
Foot states at least either condition in condition, the item that it is 50% or more when light comb width is 0.125mm which, which is respectively as follows:,
Part, the condition for being 70% or more when light comb width is 0.25mm.
The effect of invention
According to the present invention, it is possible to provide the liquid crystal display panel of the deformation reduction of the reflection image of reflective condition.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the surface structure of the liquid crystal display panel of an embodiment of the invention；
(a) of Fig. 2 is the figure for illustrating reflective condition, and (b) of Fig. 2 is the figure for illustrating transmissive state；
(a) of Fig. 3 and (b) of Fig. 3 are the figure for indicating the reflection characteristic of each sample made；
Fig. 4 be for illustrate liquid crystal display panel with how degree active region when be optimal figure.
Specific embodiment
Referring to attached drawing, an embodiment of the invention is illustrated.
The liquid crystal display panel 100 of present embodiment is the liquid crystal display panel of twisted-nematic (TN (Twisted Nematic)) type, from
From the point of view of the cross-sectional view of surface structure, constitute as shown in Figure 1.Liquid crystal display panel 100 is with can be in transmissive state and reflective condition
Between the mode that switches over constitute.For being in the liquid crystal display panel 100 of transmissive state, as shown in (a) of Fig. 2, (b) of Fig. 2
As, observer 1 penetrates and recognizes the display picture for being set to the display unit 200 of behind.On the other hand, in reflective condition
Liquid crystal display panel 100 is as shown in (a) of Fig. 2, as the mirror for reflecting outer smooth NL etc. towards observer 1.
In addition, below, 1 side of observer of liquid crystal display panel 100 is " outside " by understanding for ease of description,
In such a way that its opposite side is " inside ", each section is illustrated.In addition, it is contemplated that the viewing convenience of drawing, in Fig. 1 and
In (a) of Fig. 2, (b) of Fig. 2, the hachure for indicating section is suitably omitted.In addition, for illustrating the function of liquid crystal display panel 100
(a) of Fig. 2, in (b) of Fig. 2, omit component appropriate.
Liquid crystal display panel 100 is as shown in Figure 1, comprising: liquid crystal cell 10；Absorption positioned at the outside of liquid crystal cell 10
Type polarizing film 21；Reflection type polarizer 22 positioned at the inside of liquid crystal cell 10.The liquid crystal display panel 100 that plane is seen is such as in substantially
It is rectangular-shaped, although being not shown in figure about this point.
Liquid crystal cell 10 as shown in Figure 1, including the 1st substrate 11, the 2nd substrate 12 and liquid crystal layer 13.
1st substrate 11 and the 2nd substrate 12 are opposed facing a pair of of transparent substrates, are made of such as glass, plastics etc..
1st substrate 11 and the 2nd substrate 12 are put down in such a way that clamping liquid crystal layer 13 faces, and according to mutual interarea (opposite face)
Capable mode is arranged.1st substrate 11 is located at the outside of liquid crystal layer 13.
Transparent electrode 11a is arranged in 13 side of liquid crystal layer in the 1st substrate 11.Liquid crystal layer 13 1 in the 2nd substrate 12
Transparent electrode 12a is arranged in side.Transparent electrode 11a, 12a is formed by the well known mode of sputtering, vapor deposition, etching etc..At this
In embodiment, transparent electrode 11a, 12a is in be formed in corresponding substrate surface throughout shape respectively, in substantially square in terms of plane
Shape.Transparent electrode 11a, 12a by ITO (tin indium oxide) film of principal component etc. of indium oxide by being constituted.Transparent electricity is equipped with to being situated between
The application of the voltage of the liquid crystal layer 13 of pole 11a, 12a can also be the arbitrary driving method in passive and active.To transparent electrode
The voltage of 11a, 12a are applied through the control unit 40 with microcomputer, driving circuit etc. and carry out.
In addition, forming the insulating film being not shown in figure on the respective substrate of the 1st substrate 11 and the 2nd substrate 12, taking
To film.Insulating film is made of the insulating film of silicone resin system, according to from 13 side of liquid crystal layer and covering transparent electrode 11a, 12a it is respective
The mode of electrode is formed.In addition, forming alignment films between insulating film and liquid crystal layer 13.That is, being stacked and shape on the 1st substrate 11
At transparent electrode 11a, insulating film and alignment films.In addition, on the 2nd substrate 12 be stacked and formed transparent electrode 12a, insulating film with
Alignment films.
Alignment films are contacted with liquid crystal layer 13, and the liquid crystal molecule 13a which is used to provide that liquid crystal layer 13 is included (is scheming
Indicated in a schematic way in 2 (a), (b) of Fig. 2) state of orientation, for example formed by polyimide, by well known
Method (for example, flexible printing) and formed.Friction treatment is carried out in alignment films.In the present embodiment, from substrate normal side
To from the point of view of (normal direction of the opposite face of the 1st substrate 11 and the 2nd substrate 12), the alignment films in outside are (that is, be formed in the 1st substrate
Alignment films on 11) frictional direction, with the frictional direction of inside (that is, being formed in the alignment films on the 2nd substrate 12) substantially just
It hands over (further including just orthogonal).Two alignment films of friction treatment are carried out and like this, limitation liquid crystal molecule 13a's takes
To.In addition, the orientation process carried out in alignment films is not limited to friction treatment, light orientation processing, protrusion orientation position can also be passed through
It handles and carries out well known to the others of reason etc..
Liquid crystal layer 13 is formed by following modes, which are as follows: by for by the 1st substrate 11 and the 2nd substrate 12
The sealing material (being not shown in figure) and two substrates of engagement and encapsulated liquid crystals material in the sealing space that is formed.Liquid crystal layer
13 thickness (gap box (cell)) (is not shown in figure by the spacer that is set between the 1st substrate 11 and the 2nd substrate 12
It provides out).The liquid crystal molecule 13a of liquid crystal layer 13 is orientated according to following modes, which are as follows: passes through taking for alignment films
To restraint, the end of 12 side of end and the 2nd substrate of 1st one side of substrate of the direction of long axis in liquid crystal layer 13 is turned round
Turn 90 ° (torsion angle is 90 °), and from one of substrate side to another substrate side, is slightly rotated (revolution) every time
(chiral (chiral) structure).Like this, the liquid crystal layer 13 when voltage does not apply has chirality.
Absorption-type polarizing film 21 includes the axis of homology (below also referred to as the 1st axis of homology) and mutually orthogonal with the 1st axis of homology
Absorption axiss.Absorption-type polarizing film 21 makes the light transmission of the polarization direction parallel with the 1st axis of homology in the light injected.
Reflection type polarizer 22 includes the axis of homology (below also referred to as the 2nd axis of homology) and mutually orthogonal with the 2nd axis of homology
Axis of reflection.Reflection type polarizer 22 makes the light transmission of the polarization direction parallel with the 2nd axis of homology in the light injected, and makes
The light of the polarization direction parallel with axis of reflection reflects.
In the present embodiment, it is watched according to from substrate normal direction, the 1st axis of homology of absorption-type polarizing film 21 and anti-
2 polarizing film (parallel Buddhist nuns are arranged in the mode that 2nd axis of homology of emitting polarizing film 22 is generally parallel to each other (further including just parallel)
Section's ear polariscope configuration).In addition, frictional direction and the suction of the alignment films (that is, being formed in the alignment films on the 1st substrate 11) in outside
The absorption axiss direction of receipts type polarizing film 21 is set in a parallel manner.
Absorption-type polarizing film 21 is pasted on the face in the outside of the 1st substrate 11 via the 1st clear adhesive film 31.Reflection-type
Polarizing film 22 is pasted on the face of the inside of the 2nd substrate 12 via the 2nd clear adhesive film 32.In addition, can also be in liquid crystal cell
Between 10 and each polarizing film, the optical element of setting phase difference film etc..In this occasion, be located at liquid crystal cell 10 and polarizing film it
Between optical element on paste the polarizing film.
1st clear adhesive film 31, the 2nd clear adhesive film 32 are respectively by the transparent adhesive (acrylic acid of such as acrylic acid series
Based polymer) etc. constitute.1st clear adhesive film 31 passes through the face being pasted on the 1st substrate 11 in absorption-type polarizing film 21
The mode of upper coating transparent adhesive is formed.2nd clear adhesive film 32 is by being pasted on the 2nd lining in reflection type polarizer 22
The mode that transparent adhesive is applied on face on bottom 12 is formed.In the present embodiment, according to being formed by the 1st clear adhesive film
31, the uneven amounts of absolute value of the film thickness of the 2nd clear adhesive film 32 is that 0.5 μm of mode below passes through scraper spreader, roller
Device is applied to be applied.As long as in addition, can according to the 1st clear adhesive film 31, the 2nd clear adhesive film 32 film thickness it is uneven amounts of
Absolute value is that 0.5 μm of mode below is applied, then other coating process can also be used.It, will about the uneven amount of film thickness
It is described below.
In the liquid crystal display panel 100 being made of above structure, in transmissive state, as shown in (b) of Fig. 2, make
Display light L (light for indicating display image) transmission of display unit 200.Positioned at the inside of liquid crystal display panel 100 display unit 200 by than
Such as liquid crystal display display, organic EL (electroluminescent) with backlight are constituted with display, are shown towards liquid crystal display panel 100
Image.In addition, through transmissive state liquid crystal display panel 100 and the object recognized is not limited to the display unit 200 of image, can also be
Character board or billboard, landscape.
Herein, liquid crystal display panel 100 can switch between reflective condition and transmissive state as following.
(reflective condition)
In not outer plus driving voltage state, in liquid crystal cell 10, as shown in (a) of Fig. 2, liquid crystal molecule
13a is substantially parallel with substrate surface, and liquid crystal layer 13 is in chiral state.In the state, if outer light NL is from liquid crystal surface
The outside of plate 100 and inject, then formed transmitted from absorption-type polarizing film 21, the rectilinearly polarized light parallel with the 1st axis of homology, such as
Fruit transmits from liquid crystal layer 13, and due to passing through the chirality of liquid crystal layer 13, the polarization direction of 90 ° of transformation is formed along reflective polarizing
The rectilinearly polarized light of the axis of reflection of piece 22, therefore the light is reflected by reflection type polarizer 22.Since the reflected light is from liquid
It is transmitted in crystal layer 13, polarization direction converts 90 ° again, therefore is transmitted from absorption-type polarizing film 21.Like this, liquid crystal display panel
100 use in reflective condition, as mirror.Below, the part as mirror in the liquid crystal display panel of reflective condition 100 is claimed
For active region.
On the other hand, it if display light L is injected from the inside of liquid crystal display panel 100, is formed from reflection type polarizer 22
Middle transmission, the rectilinearly polarized light parallel with the 2nd axis of homology, if transmitted from liquid crystal layer 13, due to forming polarization direction
90 ° of transformation along the rectilinearly polarized light of the absorption axiss of absorption-type polarizing film 21, therefore can not carry out thoroughly from absorption-type polarizing film 21
It penetrates.Like this, since display light L does not advance to the outside of liquid crystal display panel 100, therefore even if liquid crystal display panel 100 is injected in display light L
In in the case where, the display image of display unit 200 can not still be recognized by observer 1.In addition, display light L is from display unit 200
When middle injection, the rectilinearly polarized light parallel with the 2nd axis of homology can also be formed.
(transmissive state)
When applying driving voltage, in liquid crystal display panel 100, as shown in (b) of Fig. 2, liquid crystal molecule 13a according to
Mode along the application direction (substrate normal direction) of voltage is orientated, its chirality is lost.In the state, if display light L
It is injected from the inside of liquid crystal display panel 100, is then formed in reflection type polarizer 22 and is transmitted, it is parallel with the 2nd axis of homology
Rectilinearly polarized light, still, even if due in the case where being transmitted from liquid crystal layer 13, still without transformation polarization direction, therefore
It is transmitted from the absorption-type polarizing film 21 with 1st axis of homology parallel with the 2nd axis of homology.Like this, liquid crystal display panel 100
Make to show light L transmission, the display image of display unit 200 is made to penetrate and recognize.
In addition, if injecting outer light NL from the outside of liquid crystal display panel 100, due to being carried out from absorption-type polarizing film 21
Transmission, the state of the rectilinearly polarized light parallel with the 1st axis of homology transmitted from liquid crystal layer 13, therefore from having and the 1st transmission
It transmits, reflects not over reflection type polarizer 22 (in addition to leakage in the reflection type polarizer 22 of the 2nd parallel axis of homology of axis
Other than the reflection of light).
From here on, the shape referring especially to (a) of Fig. 3, (b) of Fig. 3, to the reflection image for how setting reflective condition
The case where becoming the various conditions of reduced liquid crystal display panel 100 is illustrated.
The deformation that present inventor is conceived to reflection image is the 1st clear adhesive film 31 and the 2nd clear adhesive film
The film thickness of 32 (in particular, the 2nd clear adhesive films 32 for being pasted on reflection type polarizer 22 on liquid crystal cell 10) is not
Caused by uniformly (being also referred to as " membrane thickness unevenness " below), in order to find the optimal conditions of the film thickness, the liquid crystal of 4 kinds of production
The sample (liquid crystal display panel A~D shown in (a) of Fig. 3, (b) of Fig. 3) of panel.
Liquid crystal display panel A~D has structure identical with liquid crystal display panel 100, and still, in respective liquid crystal display panel, the 1st thoroughly
Bright adhesive film 31 is different with the range of the membrane thickness unevenness of the 2nd clear adhesive film 32." side F " in (a) of Fig. 3, (b) of Fig. 3
Indicate and be located at the corresponding 1st clear adhesive film 31 of the absorption-type polarizing film 21 in outside of liquid crystal cell 10, " side R " indicate and
The corresponding 2nd clear adhesive film 32 of reflection type polarizer 22 positioned at the inside of liquid crystal cell 10.In addition, under each sample uses
The material stated and make.1st substrate 11 and the 2nd substrate 12 (with a thickness of the glass substrate of 1.1mm: the production of Japanese plate glass society),
Constitute the liquid crystal material (production of AGC セ イ ミ ケ ミ カ Le society) of liquid crystal layer 13, the 1st clear adhesive film 31 and the 2nd clear adhesive film
32 (25 μm of film thickness: the production of Port ラ テ Network ノ society), absorption-type polarizing film 21 (production of Port ラ テ Network ノ society), reflection type polarizer 22
(3M company production: DBEF).
If using (a) of Fig. 3, Fig. 3 (b) shown in horizontal axis indicate " position (mm) ", the longitudinal axis indicate " non-uniform film thickness
The curve graph of the measurement result of even (μm) " and be illustrated, then membrane thickness unevenness indicate liquid crystal display panel 100 horizontal direction (with
Left and right directions in Fig. 1 is corresponding) base position (realizing the position of film thickness set) as the vertical of the occasion of " 0 (mm) "
Direction is (corresponding with the up and down direction in Fig. 1.It is identical as above-mentioned substrate normal direction) it is uneven.In addition, (a) of Fig. 3, figure
The 2nd clear adhesive that the graphical representation of measurement result shown in 3 (b) especially impacts the deformation of reflection image
The viewpoint of the curve graph of film 32, the membrane thickness unevenness of the 1st clear adhesive film 31 is also identical.In addition, membrane thickness unevenness indicates to absorb
Type polarizing film 21, reflection type polarizer 22 respective polarizing plate sticking in the 1st clear adhesive film of the state on liquid crystal cell 10
31, the membrane thickness unevenness of the 2nd clear adhesive film 32.
If being conceived to membrane thickness unevenness, firstly, as shown in (a) of Fig. 3, for liquid crystal display panel A, the side F,
The side R inhibits in the range of " ± 0.2 μm ", for liquid crystal display panel B, inhibits the range at " ± 0.5 μm " in the side F, the side R
It is interior.In addition, as shown in (b) of Fig. 3, for liquid crystal display panel C, in F lateral inhibition in the range of " ± 1.0 μm ", in the side R
Inhibit in the range of " ± 0.5 μm ", for liquid crystal display panel D, in F lateral inhibition in the range of " ± 0.5 μm ", in the side R, inhibits
In the range of " ± 1.0 μm ".In addition, no matter the side F, the side R, membrane thickness unevenness value " ± 0.2 μm ", " ± 0.5 μm " be scraper apply
Caused by the coating of cloth device or roller spreader.In addition, membrane thickness unevenness value " ± 1.0 μm " is slit coating device or molding coating
Caused by the coating of device.
Observe 4 kinds of the sample (liquid crystal display panel A~D) made like this by visual observation.4 grades are carried out in the observation
Evaluation, the deformation of reflection image is significant, and the bad occasion of commodity is "×", and the deformation of reflection image understands, and can as commodity
The occasion of permission is " Δ ", and the deformation of reflection image understands, and the good occasion of commodity is "○", and the deformation of reflection image is hardly
Clear, the more good occasion of commodity is " ◎ ", carries out the evaluation of the deformation of reflection image.As shown in (b) of Fig. 3,
For liquid crystal display panel D, it is evaluated as "×", commodity is cannot function as and uses, for liquid crystal display panel C, is evaluated as " Δ ", is allowing model
It encloses.In addition, for liquid crystal display panel B, being evaluated as "○" as shown in (a) of Fig. 3, for liquid crystal display panel A, it is evaluated as
“◎”。
Known according to above evaluation result, in order to reduce the deformation of reflection image, at least 22 side of reflection type polarizer
" the uneven amounts of absolute value of the film thickness of the 2nd clear adhesive film 32 necessarily requires to be 0.5 μm or less ", it is especially best, also
The condition of " the uneven amounts of absolute value of the film thickness of the 1st clear adhesive film 31 is 0.5 μm or less " can be met.
In addition, present inventor has also carried out the picture vividness (writing as property) of 4 kinds of sample (liquid crystal display panel A~D)
Measurement.This meets the regulation of " JIS:K7374 " as vividness, for each sample (liquid crystal of the reflective condition as test film
Panel A~D) reflection type polarizer 22, by the light comb moved, by analyzer, (ス ガ tries the ICM-of OmenJi society production
IT the light quantity that the reflected light of occasion of test light is injected with 45 ° of angle) is measured.Herein, it is in the width of light comb
The occasion of " 0.125mm ", the occasion of " 0.25mm " and be measured.As vividness is to make and the light of the reflected light from test film
Learn the mutually orthogonal light comb movement of axis, the shading light part of light quantity M and light comb when being located on optic axis according to the transmissive portion of light comb
Light quantity m when on optic axis, the value (%) calculated by the formula of { (M-m)/(M+m) } × 100.
If being conceived to the picture vividness measured like this, know for sample, in order to make commodity evaluation not be
"×", and realize good commodity, must be requested that meet " in the occasion that light comb tooth is 0.25mm, as vividness be 70% with
On " (referring to liquid crystal display panel A, the column of B, C).In addition know, it is especially best, can also it meet " in the field that light comb tooth is 0.125mm
Close, as vividness is 50% or more " (referring to the column of liquid crystal display panel A, B).
(1) for liquid crystal display panel 100 described above, due to the 2nd clear adhesive film 32 film thickness it is uneven amounts of absolutely
It is 0.5 μm to value hereinafter, therefore the deformation of the reflection image of reflective condition can be reduced.
(2) in addition, if the uneven amounts of absolute value of the film thickness of the 1st clear adhesive film 31 be also 0.5 μm hereinafter, if can
The deformation of the reflection image of reflective condition is reduced more well.
(3) in addition, the film thickness of the film thickness of suitably the 1st clear adhesive film 31 of measurement and the 2nd clear adhesive film 32, is reflecting shape
State, it is 0.125mm that with 45 degree, the picture vividness (specification for meeting JIS:K7374) of the occasion of incident light, which meets in light comb width,
When be 50% or more condition, be 70% or more when light comb width is 0.25mm condition at least any one item
Part can reduce the deformation of the reflection image of reflective condition as a result,.
In addition, the present invention is not limited to above-mentioned embodiment and attached drawings.Obviously, them can be directed to, changes and (further includes
The deletion of structural element).
In the above description, for liquid crystal display panel 100, the 1st transmission for setting absorption-type polarizing film 21 in parallel is provided
2nd axis of homology of axis and reflection type polarizer 22 is in reflective condition in no application driving voltage, is applying driving voltage
When the example (normal reflection) in transmissive state, still, however it is not limited to this.Liquid crystal display panel can also be constituted according to following modes
100, which are as follows: substantially orthogonally set the 2nd transmission of the 1st axis of homology and reflection type polarizer 22 of absorption-type polarizing film 21
Axis is in reflective condition when applying driving voltage, is in transmissive state (normal direction transmission) in no application driving voltage.?
In the example of normal direction transmission, liquid crystal display panel 100 can switch between reflective condition and transmissive state as following.
(reflective condition)
When applying driving voltage, in liquid crystal display panel 100, as aforementioned, liquid crystal molecule 13a is with applying along voltage
Add the mode capture in direction (substrate normal direction), chirality loses.In the state, if outer light NL is from liquid crystal display panel 100
Outside and inject, due to being transmitted from absorption-type polarizing film 21, the state of the rectilinearly polarized light parallel with the 1st axis of homology, from
It is transmitted in liquid crystal layer 13, therefore forms the linear polarization of the axis of reflection along the reflection type polarizer 22 parallel with the 1st axis of homology
Light is reflected by reflection type polarizer 22.The reflected light is transmitted from liquid crystal layer 13 again as former state, from tool
Have and is transmitted with the absorption-type polarizing film 21 of basic the 1st mutually orthogonal axis of homology of axis of reflection.Like this, liquid crystal display panel 100 is anti-
State is penetrated, mirror is used as.
On the other hand, if display light L is injected from the inside of liquid crystal display panel 100, due to being formed from reflection type polarizer
It is transmitted in 22, the rectilinearly polarized light parallel with the 2nd axis of homology is transmitted in liquid crystal layer 13 as former state, therefore can not be from having
It is transmitted in the absorption-type polarizing film 21 of the absorption axiss parallel with the 2nd axis of homology.Since like this, display light L is not advanced to
The outside of liquid crystal display panel 100, therefore even if observer 1 is still beyond recognition in the case where showing that light L is injected in liquid crystal display panel 100
The display image of display unit 200.
(transmissive state)
In no state for applying driving voltage, in liquid crystal display panel 100, as aforementioned, liquid crystal molecule 13a is substantial
Parallel with substrate surface, liquid crystal layer 13 is in chiral state.If showing light L out of liquid crystal display panel 100 in the state
Side and inject, then formed transmitted from reflection type polarizer 22, the rectilinearly polarized light parallel with the 2nd axis of homology, if from
It is transmitted in liquid crystal layer 13, then it is 90 ° of changeable direction of polarization, basic mutually just with the 2nd axis of homology from having by the chirality of liquid crystal layer 13
It is transmitted in the display polarizing film 21 for the 1st axis of homology handed over.Like this, liquid crystal display panel 100 make show light L transmission, through and
Recognize the display image of display unit 200.
In addition, being formed from absorption-type polarizing film 21 thoroughly if outer light NL is injected from the outside of liquid crystal display panel 100
It penetrates, the rectilinearly polarized light parallel with the 1st axis of homology, if transmitted from liquid crystal layer 13, passes through the chirality of liquid crystal layer 13, polarization
90 ° of direction transformation, form 2nd transmission substantially orthogonal along the axis of reflection of the reflection type polarizer 22 parallel with the 1st axis of homology
The rectilinearly polarized light of axis, from the 2nd axis of homology reflection type polarizer 22 in transmit, not by reflection type polarizer 22 into
Row reflection (other than the reflection of leak light).
In addition, the purposes of liquid crystal display panel 100 is also arbitrary.Can be used for clock and watch, portable terminal (for example, in transmissive state,
Show positioned at the information of display unit 200 of the inside of liquid crystal display panel 100, in reflective condition, as mirror), it is specified that window
Transflective control (for example, in transmissive state, constituting the window for transmiting scenery, in reflective condition, be used as mirror), vehicle
Side-view mirror, Room Mirror (for example, in transmissive state, show vehicle letter by being located at the display unit 200 of inside of liquid crystal display panel 100
Breath, camera image) etc. various purposes.But in the liquid crystal display panel of reflective condition 100 as be used as mirror part
Active region area (area watched from substrate normal direction) be 40cm2Above occasion, liquid crystal described above
Panel 100 is particularly preferred.Below, its reason is described referring to Fig. 4.
Present inventor is equipped with multiple liquid crystal display panels, and (as shown in Figure 4, membrane thickness unevenness value is ± 1.0 μ
The liquid crystal display panel of the range of m), in the liquid crystal display panel, structure is identical as liquid crystal display panel 100, still, the 1st clear adhesive film
31 and the 2nd clear adhesive film 32 is unsatisfactory for the condition of " the uneven amounts of absolute value of film thickness is 0.5 μm or less ".Like this, match
The area of multiple liquid crystal display panels that the deformation of standby reflection image generates significantly, respective active region it is different and be respectively " 3 ",
“7”、“40”、“135”(cm2).In addition, observing the 4 kinds of panels made like this by visual observation, the evaluation of 3 grades is carried out.
In the evaluation, the significant occasion of the deformation of reflection image is "×", and the deformation of reflection image understands, it is noted that less than occasion be
" Δ ", the deformation of reflection image almost without noticing of occasion be "○".
Know referring to Fig. 4, active region area in 3cm2~40cm2Range occasion, even if being easy to produce
Still pay attention to not in the case where film thickness (film thickness of the 1st clear adhesive film 31, the 2nd clear adhesive film 32) condition of the deformation of reflection image
To the deformation of reflection image.On the other hand know, if the area of active region is 40cm2More than, then notice the shape of reflection image
Become.Know, is 40cm in the area of active region2Above occasion, the importance for reducing the deformation of reflection image are high.
Then, the purposes of liquid crystal display panel 100 does not limit, and still, being especially preferably used in active region (can be at reflecting
The part of state) area be 40cm2Above occasion.
In addition, the area ratio of active region is for example from substrate normal direction (with absorption-type polarizing film 21 and reflective polarizing
The normal direction of the opposite face of piece 22 is identical) and the area of the occasion of viewing.In addition, being according to when applying driving voltage
Reflective condition, the mode in transmissive state constitutes the occasion of liquid crystal display panel 100 when no application driving voltage, to liquid crystal layer
13 to apply alive region (in substrate normal direction, region that transparent electrode 11a and transparent electrode 12a are overlapped) be active area
Domain.
In addition, in the above description, the liquid crystal display panel 100 for the coincidence watched from substrate normal direction is in rectangle substantially
Shape still can also be circle, multilateral shape etc., correspond to purposes, shape is arbitrary.Similarly, from substrate normal side
To and the shape of transparent electrode 11a, 12a watched also is arbitrary.
In addition, in the above description, provide liquid crystal cell 10 be torsion angle be 90 ° TN type liquid crystal example, but
It is not limited to this.If the application for the voltage that reflective condition above-mentioned and transmissive state can correspond on liquid crystal layer 13 and realize,
Then torsion angle is also smaller than 90 °, can also be greater than 90 °.For example, liquid crystal cell 10 can also be STN (super twisted nematic, Super
Twisted Nematic) type.In addition, if reflective condition and transmissive state can correspond to the application of the voltage on liquid crystal layer 13
And realize, then the 1st axis of homology of absorption-type polarizing film 21 and the 2nd axis of homology of reflection type polarizer 22 can not also be parallel or just
The relationship of friendship, their optic axis can not also be parallel or orthogonal relationship with the frictional direction of alignment films.Transmission can also be investigated
The reflection characteristic of the viewing angle characteristic of state, reflective condition, suitably makes each optic axis be staggered.
In the above description, to facilitate the understanding of the present invention, the appropriate explanation for omitting well known technology item.
The explanation of label:
Label 100 indicates liquid crystal display panel；
Label 10 indicates liquid crystal cell；
Label 11 indicates the 1st substrate；
Label 11a indicates transparent electrode；
Label 12 indicates the 2nd substrate；
Label 12a indicates transparent electrode；
Label 13 indicates liquid crystal layer；
Label 13a indicates liquid crystal molecule；
Label 21 indicates absorption-type polarizing film；
Label 22 indicates reflection type polarizer；
Label 31 indicates the 1st clear adhesive film；
Label 32 indicates the 2nd clear adhesive film；
Label 40 indicates control unit.
Claims (5)
1. a kind of liquid crystal display panel, which corresponds to the application of voltage, switches between transmissive state and reflective condition,
It is characterized in that, which includes:
Liquid crystal cell, the liquid crystal cell include liquid crystal layer and the transparent electrode for applying above-mentioned voltage on the liquid crystal layer；
Absorption-type polarizing film, the absorption-type polarizing film are set to the side of above-mentioned liquid crystal cell via the 1st clear adhesive film；
Reflection type polarizer, the reflection type polarizer are set to the other side of above-mentioned liquid crystal cell via the 2nd clear adhesive film,
It is faced in a manner of clamping above-mentioned liquid crystal cell with above-mentioned absorption-type polarizing film；
In above-mentioned reflective condition, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is along upper
The light for stating the polarization axle of the axis of reflection of reflection type polarizer is reflected by above-mentioned reflection type polarizer；
In above-mentioned transmissive state, injected from above-mentioned absorption-type polarizing film side, the light that is transmitted from above-mentioned liquid crystal cell for along with
The light of the polarization axle for the axis of homology that the axis of reflection of above-mentioned reflection type polarizer intersects is transmitted from above-mentioned reflection type polarizer；
The uneven amounts of absolute value of the film thickness of above-mentioned 2nd clear adhesive film is 0.5 μm or less.
2. liquid crystal display panel according to claim 1, which is characterized in that the film thickness of above-mentioned 1st clear adhesive film it is uneven
The absolute value of amount is 0.5 μm or less.
3. liquid crystal display panel according to claim 1 or 2, which is characterized in that in above-mentioned reflective condition, light is injected with 45 degree
The picture vividness (specification for meeting JIS:K7374) of occasion meet at least either condition in following conditions, condition difference
Are as follows: the condition for being 50% or more when light comb width is 0.125mm, the item for being 70% or more when light comb width is 0.25mm
Part.
4. liquid crystal display panel described in any one of claim 1 to 3, which is characterized in that from above-mentioned absorption-type polarizing film and
The normal direction of the opposite face of above-mentioned reflection type polarizer and watch, can be in the area of part of above-mentioned reflective condition
40cm2More than.
5. a kind of liquid crystal display panel, which corresponds to the application of voltage, switches between transmissive state and reflective condition,
It is characterized in that, which includes:
Liquid crystal cell, the liquid crystal cell include liquid crystal layer and the transparent electrode for applying above-mentioned voltage on the liquid crystal layer；
Absorption-type polarizing film, the absorption-type polarizing film are set to the side of above-mentioned liquid crystal cell via the 1st clear adhesive film；
Reflection type polarizer, the reflection type polarizer are set to the other side of above-mentioned liquid crystal cell via the 2nd clear adhesive film,
It is faced in a manner of clamping above-mentioned liquid crystal cell with above-mentioned absorption-type polarizing film；
In above-mentioned reflective condition, injected from above-mentioned absorption-type polarizing film side, the light that transmits from above-mentioned liquid crystal cell is along upper
The light for stating the polarization axle of the axis of reflection of reflection type polarizer is reflected by above-mentioned reflection type polarizer；
In above-mentioned transmissive state, injected from above-mentioned absorption-type polarizing film side, the light that is transmitted from above-mentioned liquid crystal cell for along with
The light of the polarization axle for the axis of homology that the axis of reflection of above-mentioned reflection type polarizer intersects is transmitted from above-mentioned reflection type polarizer；
In above-mentioned reflective condition, under the picture vividness (specification for meeting JIS:K7374) for the occasion that light is injected with 45 degree meets
State at least either condition in condition, condition that it is 50% or more when light comb width is 0.125mm which, which is respectively as follows:,
The condition that light comb width is 70% or more when being 0.25mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-246432 | 2016-12-20 | ||
| JP2016246432 | 2016-12-20 | ||
| PCT/JP2017/044467 WO2018116895A1 (en) | 2016-12-20 | 2017-12-12 | Liquid crystal panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110088671A true CN110088671A (en) | 2019-08-02 |
Family
ID=62627368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780078591.6A Pending CN110088671A (en) | 2016-12-20 | 2017-12-12 | Liquid crystal display panel |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2018116895A1 (en) |
| CN (1) | CN110088671A (en) |
| WO (1) | WO2018116895A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018146958A1 (en) * | 2017-02-09 | 2018-08-16 | 富士フイルム株式会社 | Half mirror, method for producing half mirror, and mirror provided with image display function |
| JP7461217B2 (en) * | 2020-05-22 | 2024-04-03 | スタンレー電気株式会社 | optical device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1172782A (en) * | 1997-08-27 | 1999-03-16 | Citizen Watch Co Ltd | Liquid crystal display device |
| CN1234878A (en) * | 1997-07-18 | 1999-11-10 | 时至准钟表股份有限公司 | Liquid crystal display |
| CN1470914A (en) * | 2002-07-04 | 2004-01-28 | 精工爱普生株式会社 | Displaying apparatus and electronic apparatus with said device |
| CN104240608A (en) * | 2014-09-29 | 2014-12-24 | 深圳市华星光电技术有限公司 | Display device |
-
2017
- 2017-12-12 WO PCT/JP2017/044467 patent/WO2018116895A1/en active Application Filing
- 2017-12-12 JP JP2018557690A patent/JPWO2018116895A1/en not_active Abandoned
- 2017-12-12 CN CN201780078591.6A patent/CN110088671A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1234878A (en) * | 1997-07-18 | 1999-11-10 | 时至准钟表股份有限公司 | Liquid crystal display |
| JPH1172782A (en) * | 1997-08-27 | 1999-03-16 | Citizen Watch Co Ltd | Liquid crystal display device |
| CN1470914A (en) * | 2002-07-04 | 2004-01-28 | 精工爱普生株式会社 | Displaying apparatus and electronic apparatus with said device |
| JP2004037944A (en) * | 2002-07-04 | 2004-02-05 | Seiko Epson Corp | Display arrangement and electronic apparatus equipped with same |
| CN104240608A (en) * | 2014-09-29 | 2014-12-24 | 深圳市华星光电技术有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2018116895A1 (en) | 2019-10-24 |
| WO2018116895A1 (en) | 2018-06-28 |
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Application publication date: 20190802 |