CN101393358B - LCD structure - Google Patents

LCD structure Download PDF

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CN101393358B
CN101393358B CN2008101755766A CN200810175576A CN101393358B CN 101393358 B CN101393358 B CN 101393358B CN 2008101755766 A CN2008101755766 A CN 2008101755766A CN 200810175576 A CN200810175576 A CN 200810175576A CN 101393358 B CN101393358 B CN 101393358B
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liquid crystal
light
chemical formula
polymerization type
display device
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CN101393358A (en
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丘至和
郑德胜
谢忠憬
白家瑄
黄晟玮
杉浦规生
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AU Optronics Corp
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Abstract

The present invention discloses a liquid crystal display structure, which comprises a liquid crystal panel and a backlight module. The liquid crystal panel is provided with a liquid crystal layer, wherein the liquid crystal layer comprises light polymerization type monomers. The backlight module comprises a luminous unit, and the minimum value of the frequency spectrum interval of output light produced by the luminous unit and the maximum value of the frequency spectrum interval of the absorption peak of the light polymerization type monomer are more than or equal to about 40 nanometers.

Description

Liquid crystal display device structure
Technical field
The present invention relates to a kind of liquid crystal display device structure; Particularly, the present invention relates to a kind of liquid crystal display device structure that is used for the stabilizing polymer alignment liquid crystal display monitor, have less image residue problem.
Background technology
(Liquid Crystal Display, LCD), (Polymer Stabilized Alignment, PSA) technology has the light leak of minimizing, improves advantages such as contrasting, reduce cost and increase penetrance in the stabilizing polymer orientation for LCD.This technology is that crosslinkable monomer (monomer) is mixed in the middle of the liquid crystal, by applying a voltage in the liquid crystal cell (liquid crystal cell), makes that being blended in monomer in the liquid crystal follows liquid crystal molecule and arrange under the voltage that applies.Via the ultraviolet-crosslinkable curing monomer, can produce specific tilt angle (pre-tilt angle) again, and then the orientation ability of control liquid crystal, reach the function that replaces projection (bump).Therefore, when dark attitude, just can overcome vertical orientation type between multi-region (Multi-domain Vertical Alignment mode, MVA mode) projection, so as to reaching the effect that improves contrast etc. to the light leakage phenomena that liquid crystal caused.
Because aforementioned use ultraviolet-crosslinkable solidifies in the reasonable time of being blended in the process need of monomer in the liquid crystal, therefore, comprises the uncrosslinked curing of monomer in interior factor can make the part liquid crystal of deficiency set time.The monomer of these uncrosslinked curing may be subjected to cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL) irradiate light of being exported and carry out cross-linking and curing reaction, produce different tilt angles, and then cause the phenomenon of image residue (image sticking), so the above uses the LCD of stabilizing polymer alignment technique still to remain to be improved.Avoid the method that image residue takes place to be at present, in making the LCD process, make the monomer reaction in the liquid crystal complete as far as possible, that is, reduce the monomer concentration that is blended in the LCD in the liquid crystal, but this method can cause complicated and processing procedure time of processing procedure significantly to increase as far as possible.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of liquid crystal display device structure, can reduce the image residue problem, simplifies the technology of LCD and shorten the process time.
Liquid crystal display device structure of the present invention comprises liquid crystal panel and backlight module.Liquid crystal panel has liquid crystal layer, and liquid crystal layer comprises light polymerization type monomers.Backlight module comprises luminescence unit, and luminescence unit produces output light.Minimum value between the spectrum region of this output light is greater than the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of this liquid crystal layer, and the difference between the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of the minimum value between the spectrum region of output light and this liquid crystal layer is more than or equal to 40nm.
According to one embodiment of the invention, luminescence unit comprises light source and filter coating.Filter coating is arranged at the bright dipping side of light source.Light source sends original light, and original light is by forming output light behind the filter coating.Minimum value between the spectrum region of this output light is greater than the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of this liquid crystal layer, and the difference between the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of the minimum value between the spectrum region of output light and liquid crystal layer is more than or equal to 40nm.Light source is that (light-emitting diode, LED) or cathode fluorescent tube, filter coating comprises macromolecule and absorbing agent to light-emitting diode (LED) module.
This luminescence unit is a light-emitting diode (LED) module.
The concentration of the light polymerization type monomers that liquid crystal layer is contained is between 0.1 weight % to 10 weight %.The maximal value in the absorption spectrum interval of the light polymerization type monomers that liquid crystal layer is contained is less than or equal to 340nm approximately.Minimum value between the spectrum region of output light is approximately more than or equal to 380nm.
The contained light polymerization type monomers of this liquid crystal layer be selected from Chemical formula 1,2,3,4 and 5 groups that formed wherein one:
[Chemical formula 1]
Figure DEST_PATH_GSB00000009231700011
[Chemical formula 2]
Figure DEST_PATH_GSB00000009231700012
[chemical formula 3]
Figure DEST_PATH_GSB00000009231700013
[chemical formula 4]
Figure DEST_PATH_GSB00000009231700014
[chemical formula 5]
Figure GA20182567200810175576601D00031
Wherein, substituent R be-H ,-F ,-Cl ,-CN ,-SCN ,-SF 5H ,-NO 2, have the straight or branched bond alkyl or-X 2-Sp 2-P 2
Substituent X 1 and X2 independently be-O-,-S-,-OCH 2-,-CO-,-COO-,-OCO-,-CO-N 0R-,-N 0R-CO-,-OCH 2-,-SH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-or single bond;
Sp1 and Sp2 independently are interval body (spacer group) or single base (single group);
Lm is fluorine-based, chloro, cyano group (CN) or alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or the alkane carboxyl (alkylcarbonyloxy) that contains 1 to 7 carbon atom, and alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or alkane carboxyl (alkylcarbonyloxy) wherein at least one hydrogen atom can be replaced by fluorine or chlorine, wherein, m 〉=1;
n≥1；
Q 1With Q 2Independently be-O-,-S-,-CO-,-COO-,-OCO-,-OCH 2-,-SCH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-,-CF 2O-,-OCF 2-,-CF 2S-,-SCF 2-,-C 2H 4-,-CF 2-CH 2-,-CH 2-CF 2-,-CF 2-CF 2-,-CH=CH-,-CF=CF-,-C ≡ C-or single bond; And
P1 and P2 independently are polymerizable group (polymerizable group), and be selected from chemical formula 6,7,8,9 and 10 groups that formed wherein one:
Figure GA20182567200810175576601D00032
Substituent R is to have 1 a straight or branched alkyl (alkyl) to twelve carbon atom, wherein one or two non-adjacent-CH 2-can by-O-,-S-,-CH=CH-,-CO-,-OCO-,-COO-,-S-CO-,-CO-S-or alkynes class (alkyne) replace, and oxygen (O) atom and sulphur (S) atom direct bond each other not.
Adopt liquid crystal display device structure of the present invention, can reduce the image residue problem, simplify the technology of LCD and shorten the process time.
Description of drawings
Fig. 1 is a preferred embodiment synoptic diagram of the present invention;
Fig. 2 is the absorption spectrum figure of the cathode fluorescent tube of preferred embodiment of the present invention;
Fig. 3 is the absorption spectrum figure of the light polymerization type monomers of preferred embodiment of the present invention;
Fig. 4 is the penetrance spectrogram of the filter coating of preferred embodiment of the present invention;
Fig. 5 is the different embodiments of the invention synoptic diagram;
Wherein, Reference numeral:
100: liquid crystal display device structure
300: liquid crystal panel
310: liquid crystal layer
500: backlight module
510: luminescence unit
511: original light
512: light source
512a: bright dipping side
513: output light
514: filter coating
Embodiment
The invention provides a kind of liquid crystal display device structure.Preferred embodiment as shown in Figure 1, liquid crystal display device structure 100 of the present invention comprises liquid crystal panel 300 and backlight module 500.Liquid crystal panel 300 has liquid crystal layer 310, and liquid crystal layer 310 comprises light polymerization type monomers (not illustrating).In preferred embodiment, the concentration of the light polymerization type monomers that liquid crystal layer is contained is between 0.1 weight % to 10 weight %.
Light polymerization type monomers is preferable to comprise following Chemical formula 1,2,3,4 or 5 compound:
Figure GA20182567200810175576601D00051
Figure GA20182567200810175576601D00061
Wherein, substituent R be-H ,-F ,-Cl ,-CN ,-SCN ,-SF 5H ,-NO 2, have the straight or branched bond alkyl (alkyl) or-X 2-Sp 2-P 2And when substituent R was the alkyl (alkyl) with straight or branched bond, substituent R is preferably had the 1 straight or branched alkyl to twelve carbon atom, and central one or two non-adjacent-CH 2-can by-O-,-S-,-CH=CH-,-CO-,-OCO-,-COO-,-S-CO-,-CO-S-or alkynes class (alkyne) replace, and oxygen (O) atom and sulphur (S) atom direct bond each other not.And substituent X 1And X 2Independently be-O-,-S-,-OCH 2-,-CO-,-COO-,-OCO-,-CO-N 0R-,-N 0R-CO-,-OCH 2-,-SH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-or single bond.Sp1 and Sp2 independently are interval body (spacer group) or single base (single group); Lm (m 〉=1) is for fluorine-based, chloro, cyano group (CN) or contain alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or the alkane carboxyl (alkylcarbonyloxy) of 1 to 7 carbon atom, and alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or alkane carboxyl (alkylcarbonyloxy) wherein at least one hydrogen atom can replace by fluorine or chlorine; N 〉=1; Q 1With Q 2Independently be-O-,-S-,-CO-,-COO-,-OCO-,-OCH 2-,-SCH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-,-CF 2O-,-OCF 2-,-CF 2S-,-SCF 2-,-C 2H 4-,-CF 2-CH 2-,-CH 2-CF 2-,-CF 2-CF 2-,-CH=CH-,-CF=CF-,-C ≡ C-or single bond; P 1And P 2Independent is polymerizable group (polymerizable group), and comprises the compound of following chemical formula 6,7,8,9 or 10:
Figure GA20182567200810175576601D00062
[chemical formula 8]
Figure DEST_PATH_GSB00000009231700021
[chemical formula 9]
Wherein, substituting group Y is fluorine-based, trifluoromethyl (CF3) or phenyl (Ph);
[Chemical formula 1 0]
Figure DEST_PATH_GSB00000009231700023
Wherein, substituting group Q is methyl (CH3), fluorine-based, trifluoromethyl (CF3) or phenyl (Ph);
Backlight module 500 comprises luminescence unit 510, and luminescence unit 510 produces output light 513.Difference between the maximal value in the absorption spectrum interval of the light polymerization type monomers that minimum value between the spectrum region of output light 513 and liquid crystal layer 310 are contained is approximately more than or equal to 40nm.In preferred embodiment as shown in Figure 1, luminescence unit 510 comprises light source 512 and filter coating 514, and filter coating 514 is arranged at the bright dipping side 512a of light source 512.Wherein, light source 512 sends original light 511, original light 511 forms output light 513 by filter coating 514 backs, and the difference between the maximal value in the absorption spectrum interval of the light polymerization type monomers that the minimum value between the spectrum region of output light 513 and liquid crystal layer 310 are contained is approximately more than or equal to 40nm.Because the absorption spectrum interval with light polymerization type monomers between the spectrum region of output light 513 does not overlap, can reduce light polymerization type monomers residual in the liquid crystal panel 300 whereby and carry out the probability that photopolymerization reaction produces ghost because of being subjected to exporting light 513 irradiations.
Particularly, in this preferred embodiment, light source 512 is a cathode fluorescent tube.Yet in different embodiment, light source 512 can be light-emitting diode (LED) module.Filter coating 514 comprises macromolecule (not illustrating) and absorbing agent (not illustrating).Macromolecule is in order to the typing film forming, and absorbing agent then is used to absorb the light between the specific absorption spectrum region.Wherein, the absorption spectrum figure of cathode fluorescent tube and the absorption spectrum figure of light polymerization type monomers distinguish as shown in Figures 2 and 3, and light polymerization type monomers then is the compound of above-mentioned [Chemical formula 2].In this preferred embodiment, the absorption spectrum interval of cathode fluorescent tube is approximately greater than 360nm, and the maximal value in the absorption spectrum interval of light polymerization type monomers is less than or equal to 340nm approximately, though overlap to occur simultaneously, owing to the absorption spectrum of light polymerization type monomers may produce offset phenomena along with the place solution environmental changes.Therefore, the absorption spectrum of residual light polymerization type monomers still may be when the panel start and the absorption spectrum of cathode fluorescent tube overlap and occur simultaneously.
The penetrance spectrogram of filter coating as shown in Figure 4, in preferred embodiment, but the light that filter coating filtering 380nm is following makes the original light that sent by cathode fluorescent tube form minimum value between the spectrum region of exporting light by institute behind the filter coating approximately more than or equal to 380nm.In other words, filter coating can be with in the middle of the light that cathode fluorescent tube sent, may be absorbed by light polymerization type monomers and carry out the part filtering of photopolymerization reaction, and the difference between the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of the minimum value between the spectrum region of output light 513 and liquid crystal layer 310 is approximately more than or equal to 40nm.Whereby, can reduce light polymerization type monomers residual in technology carries out photopolymerization reaction because of the irradiate light that is subjected to cathode fluorescent tube and sends and produces ghost.
Preferable polyethylene terephthalate (the polyethylene terephthalate that comprises of macromolecule, PTFE), Polyethylene Naphthalate (polyethylene-2,6-naphthalate, PEN), Triafol T (cellulose triacetate, TAC), polypropylene (polypropylene, PP), tygon (polyethylene, PE), polycarbonate (polycarbonate, PC), polymethylmethacrylate (polymethyl methacrylate), Polyvinylchloride (poly (vinyl chloride), PVC) or Nuo Bainei resin (norbornene resins) etc.The preferable derivant that comprises benzotriazole (benzotriazole), salicylic acid (salicylate), benzophenone (benzophenone) or ammonia butadiene (aminobutadiene) or above-claimed cpd of absorbing agent.
In different embodiment, the luminescence unit 510 among Fig. 1 can be the light-emitting diode (LED) module that does not comprise filter coating 514, that is, as shown in Figure 5.In these different embodiment, light-emitting diode (LED) module as luminescence unit 510 for example is the mixed light light emitting diode of ruddiness, green glow and blue light, minimum value is approximately more than or equal to 470nm between the spectrum region of its output light 513, and the maximal value in the absorption spectrum interval of light polymerization type monomers is less than or equal to 340nm approximately.Therefore the two does not have overlapping, can reduce light polymerization type monomers residual in technology equally and carry out photopolymerization reaction because of the irradiate light that is subjected to cathode fluorescent tube and sends and produce ghost.And above-mentioned light-emitting diode (LED) module is not limited to the mixed light light emitting diode of ruddiness, green glow and blue light, so long as the difference between the maximal value in the absorption spectrum interval of minimum value between the spectrum region of output light and the contained light polymerization type monomers of liquid crystal layer gets final product more than or equal to the light-emitting diode (LED) module of 40nm approximately.For example, in different embodiment, light-emitting diode (LED) module can comprise ultraviolet light-emitting diodes and phosphor blends, and wherein phosphor blends comprises red-emitting phosphor, green phosphor and blue phosphor.In another different embodiment, light-emitting diode (LED) module can comprise blue light-emitting diode and yellow phosphor.
Certainly; the present invention also can have other various embodiments; can be used in the modification of many forms, structure, layout, ratio, material, assembly and assembly; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims (10)

1. a liquid crystal display device structure is characterized in that, comprises:
One liquid crystal panel, this liquid crystal panel has a liquid crystal layer, and this liquid crystal layer comprises light polymerization type monomers; And
One backlight module, comprise a luminescence unit, this luminescence unit produces an output light, minimum value between the spectrum region of this output light is greater than the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of this liquid crystal layer, and the difference between the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of the minimum value between should the spectrum region of output light and this liquid crystal layer is more than or equal to 40nm.
2. liquid crystal display device structure according to claim 1 is characterized in that, this luminescence unit comprises:
One light source; And
One filter coating, be arranged at the bright dipping side of this light source, wherein this light source sends an original light, this original light is by forming this output light behind this filter coating, minimum value between the spectrum region of this output light is greater than the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of this liquid crystal layer, and the difference between the maximal value in the absorption spectrum interval of the contained light polymerization type monomers of the minimum value between should the spectrum region of output light and this liquid crystal layer is more than or equal to 40nm.
3. liquid crystal display device structure according to claim 2 is characterized in that, this light source is cathode fluorescent tube or light-emitting diode (LED) module.
4. liquid crystal display device structure according to claim 2 is characterized in that, this filter coating comprises a macromolecule and an absorbing agent.
5. liquid crystal display device structure according to claim 1 is characterized in that, this luminescence unit is a light-emitting diode (LED) module.
6. liquid crystal display device structure according to claim 1 is characterized in that, the concentration of the light polymerization type monomers that this liquid crystal layer is contained is between 0.1 weight % to 10 weight %.
7. liquid crystal display device structure according to claim 1 is characterized in that, the maximal value in the absorption spectrum interval of the light polymerization type monomers that this liquid crystal layer is contained is less than or equal to 340nm approximately.
8. liquid crystal display device structure according to claim 1 is characterized in that, the minimum value between the spectrum region of this output light is approximately more than or equal to 380nm.
9. liquid crystal display device structure according to claim 1 is characterized in that, the contained light polymerization type monomers of this liquid crystal layer be selected from Chemical formula 1,2,3,4 and 5 groups that formed wherein one:
[Chemical formula 1]
Figure FSB00000009231600021
[Chemical formula 2]
Figure FSB00000009231600022
[chemical formula 3]
Figure FSB00000009231600023
[chemical formula 4]
[chemical formula 5]
Figure FSB00000009231600025
Wherein, substituent R be-H ,-F ,-Cl ,-CN ,-SCN ,-SF 5H ,-NO 2, have the straight or branched bond alkyl or-X 2-Sp 2-P 2
Substituent X 1 and X2 independently be-O-,-S-,-OCH 2-,-CO-,-COO-,-OCO-,-CO-N 0R-,-N 0R-CO-,-OCH 2-,-SH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-or single bond;
Sp1 and Sp2 independently are interval body (spacer group) or single base (single group);
Lm is fluorine-based, chloro, cyano group (CN) or alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or the alkane carboxyl (alkylcarbonyloxy) that contains 1 to 7 carbon atom, and alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or alkane carboxyl (alkylcarbonyloxy) wherein at least one hydrogen atom can be replaced by fluorine or chlorine, wherein, m 〉=1;
n≥1；
Q 1With Q 2Independently be-O-,-S-,-CO-,-COO-,-OCO-,-OCH 2-,-SCH 2-,-CH 2S-,-CH=CH-COO-,-OOC-CH=CH-,-CF 2O-,-OCF 2-,-CF 2S-,-SCF 2-,-C 2H 4-,-CF 2-CH 2-,-CH 2-CF 2-,-CF 2-CF 2-,-CH=CH-,-CF=CF-,-C ≡ C-or single bond; And
P1 and P2 independently are polymerizable group (polymerizable group), and be selected from chemical formula 6,7,8,9 and 10 groups that formed wherein one:
[chemical formula 6]
Figure FSB00000009231600031
Wherein, substituting group W is hydrogen base, methyl (CH 3), fluorine-based, trifluoromethyl (CF3) or phenyl (Ph);
[chemical formula 7]
Figure FSB00000009231600032
Wherein, substituting group Z is hydrogen base, methyl (CH3), fluorine-based, trifluoromethyl (CF3) or phenyl (Ph);
[chemical formula 8]
[chemical formula 9]
Wherein, substituting group Y is fluorine-based, trifluoromethyl (CF3) or phenyl (Ph);
[Chemical formula 1 0]
Figure FSB00000009231600035
Wherein, substituting group Q is methyl (CH3), fluorine-based, trifluoromethyl (CF3) or phenyl (Ph).
10. liquid crystal display device structure according to claim 9 is characterized in that, substituent R is to have 1 a straight or branched alkyl (alkyl) to twelve carbon atom, wherein one or two non-adjacent-CH 2-can by-O-,-S-,-CH=CH-,-CO-,-OCO-,-COO-,-S-CO-,-CO-S-or alkynes class (alkyne) replace, and oxygen (O) atom and sulphur (S) atom direct bond each other not.
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