CN101320162B - Liquid crystal display device capable of low temperature use - Google Patents
Liquid crystal display device capable of low temperature use Download PDFInfo
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- CN101320162B CN101320162B CN2008101089267A CN200810108926A CN101320162B CN 101320162 B CN101320162 B CN 101320162B CN 2008101089267 A CN2008101089267 A CN 2008101089267A CN 200810108926 A CN200810108926 A CN 200810108926A CN 101320162 B CN101320162 B CN 101320162B
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Abstract
The invention discloses a liquid crystal display device used at a low temperature, comprising: a liquid crystal display element comprising a pair of glass substrates facing to each other, transparent electrode patterns, each transparent electrode pattern being formed on a facing surface of each one of said pair of glass substrates film structures, each film structure including an oriented film and being formed on each one of said pair of glass substrates with covering said transparent electrode, and a liquid crystal layer held between the pair of glass substrates; and a light source that can radiate near infrared rays to said liquid crystal display element, and wherein at least one of said liquid crystal layer and said film structures include near infrared ray absorption material. A response time of the liquid crystal display device can be improved at a low temperature.
Description
Technical field
The present invention relates to liquid crystal display, more particularly, relate to the liquid crystal display that is suitable for using at low temperatures.
Background technology
Because liquid crystal viscosity becomes higher, thus the response time of LCD become quite slow at low temperatures.If response speed is slow, fuzzy or afterimage possibly appear in the motion picture, and make display quality obviously reduce.The liquid crystal display that is used for mobile unit, outdoor display board, mobile phone, mobile television etc. need improve the response speed under the low temperature.JPA 2000-93841 has disclosed a kind of liquid crystal display, wherein on glass substrate, is equipped with panel heater, heats whole liquid crystal cells with dull and stereotyped heating source.Because through glass substrate and Polarization filter heating fluid crystal layer, the thermal efficiency is considered to lower.Therefore, be difficult to have only power-limited mobile phone.
JPA 2005-24866 has disclosed liquid crystal display, and the whole liquid crystal cells of rayed that wherein sends with infrared ray (IR) light emitting diode (LED) through light pipe is with the heating fluid crystal layer.Can think that the infrared ray major part of irradiation is absorbed by Polarization filter.Liquid crystal layer depends on the infrared absorption character of liquid crystal material to ultrared absorption.The thermal efficiency is considered to lower.
Summary of the invention
The purpose of this invention is to provide liquid crystal display with the low temperature response speed that has improved.
According to the present invention, a kind of liquid crystal display is provided, this liquid crystal display comprises liquid crystal display cells and light source, this liquid crystal display cells comprises: a pair of glass substrate respect to one another; Transparent electrode pattern, each transparent electrode pattern forms on each facing surfaces of described a pair of glass substrate; Membrane structure, each membrane structure comprises alignment film, and is formed on each glass substrate of said a pair of glass substrate, and covers said transparency electrode; And the liquid crystal layer that between described a pair of glass substrate, keeps; Said light source can be to described liquid crystal display cells irradiation near infrared ray, and comprises one of at least near-infrared-absorbing material in wherein said liquid crystal layer and the described membrane structure.
According to the present invention, can improve the response speed of the liquid crystal display under the low temperature.
Description of drawings
Fig. 1 is the schematic cross-section of liquid crystal display.
Fig. 2 is the sectional view of the liquid crystal display cells of first embodiment of the invention.
Fig. 3 A and Fig. 3 B are the synoptic diagram of measuring system.
Fig. 4 illustrates the figure according to the transmitted spectrum of the sample S1 of the liquid crystal cells of first embodiment with the transmitted spectrum of the sample SC1 of comparative example with comparing.
Fig. 5 A and Fig. 5 B be according to the sample S1 of the liquid crystal display cells of first embodiment-20 with-30 degrees centigrade response time correspondence table as the near infrared irradiation time of parameter.
Fig. 6 is the sectional view of liquid crystal display cells second embodiment of the invention.
Fig. 7 illustrates the figure according to the transmitted spectrum of the sample S2 of the liquid crystal cells of second embodiment with the transmitted spectrum of the sample SC2 of comparative example with comparing.
Fig. 8 is at-30 degrees centigrade the response time correspondence table as the near infrared irradiation time of parameter according to the sample S2 of the liquid crystal display cells of second embodiment.
Fig. 9 is according to the sample S2a of the liquid crystal display cells of the modified example of second embodiment table-30 degrees centigrade response time.
Figure 10 is the sectional view according to the liquid crystal display cells of the 3rd embodiment of the present invention.
Figure 11 illustrates the figure according to the transmitted spectrum of the sample S3A of the liquid crystal cells of the 3rd embodiment and S3B with the transmitted spectrum of the sample SC3 of comparative example with comparing.
Figure 12 shows the figure of voltage-transmitted spectrum of sample S3A, S3B and SC3.
Figure 13 shows the figure of the response characteristic of sample S3A, S3B and SC3.
Figure 14 is the front elevation that the outdoor display board of liquid crystal display is housed.
Figure 15 A and Figure 15 B are the side views that light unit example is shown.
Embodiment
Fig. 1 is the schematic cross-section of the basic structure of liquid crystal display.Liquid crystal display mainly comprises liquid crystal display cells 101 and light unit 102.Shown in the figure is that the light unit is a situation backlight.For example, the light source of light unit 102 is made up of visible light LED and infrared (IR) LED, and visible light LED is used for back lighting, and infrared (IR) LED irradiation near infrared ray is used for heating.Configuration scatter plate 103 between liquid crystal display cells 101 and light unit 102.
Usually, in LCD, between glass substrate, place liquid crystal.About 3 μ m of wavelength or above ultrared transmissivity are low.With infrared ray heating fluid crystal layer the time, preferably infrared ray is not absorbed by glass substrate, but absorbs by liquid crystal layer or near the film (that is, alignment film or dielectric film) of liquid crystal layer.
The infrared ray that inventor of the present invention considers to use wavelength 3 μ m or be shorter than 3 μ m to be reducing the absorption of glass substrate, and adds the ultrared material that absorbs irradiation to liquid crystal layer or to the film near liquid crystal layer.For example, in liquid crystal, add metallic particles, be used to make liquid crystal layer absorbing wavelength 3 μ m or shorter infrared ray, thereby improve the response speed of liquid crystal display.Again for example, in the basement membrane of alignment film (near that tunic of liquid crystal layer) or alignment film, add the ultrared material of absorption, be used to make film absorbing wavelength 3 μ m or shorter infrared ray, thereby improve the response speed of liquid crystal display near liquid crystal layer.
(first embodiment)
Fig. 2 is the sectional view according to the liquid crystal display cells 101 of first embodiment.With the situation of describing the yellow pattern of positivity, wherein liquid crystal cells is super-twist nematic (STN) liquid crystal cells.
On each of two glass substrate 1A and 1B, form indium tin oxidation (ITO) film through CVD, vapour deposition or sputtering technology, make the required ITO electrode pattern 2 and outlet line 2t of the patterned formation of film of formation through photoetching process as hyaline membrane.On glass substrate, form the dielectric film 4 that covers ITO electrode pattern 2 through flexographic printing (flexoprinting).Dielectric film 4 is not essential, but is preferably formed, to prevent the short circuit between the upper and lower base plate.Can be through forming dielectric film with the vapour deposition that utilizes metal mask outside the non-flexographic printing, sputter etc.
Form on dielectric film 4 through flexographic printing and to have and the insulating film pattern horizontal direction matching film 5h of pattern (horizontally-oriented film 5h) much at one.In the situation of STN-LCD, tilt angle (angle of liquid crystal molecule relative standard face tilt) is preferably 2 to 8 degree.For example, horizontal direction matching film 5h can be from Nissan Chemical Industries, and Ltd. company obtains, and to the enforcement friction process.Friction process is the technology that the cylinder rolled with cloth comes level of friction film 5h of rolling fast.Implement this technology, be set to 240 degree (left-handed) with the windup-degree of liquid crystal 3x.
Serigraphy through with predetermined pattern forms encapsulant 6.Can also be through dispensing device but not serigraphy forms encapsulant 6.For example, the thermosetting ES-7500 that obtains from Mitsui chemical Inc company can be used as encapsulant.Also can use photocuring or photo-thermal curing type encapsulant.The spun glass that in encapsulant 6, comprises the diameter 6 μ m of several number percents.
Printing conductive material on the precalculated position.For example, the material that will be processed by the encapsulant ES-7500 of the gold-plated styrene ball of 6.5 μ m that contains several number percents is printed on the precalculated position, as conductive material 7.
Only on top substrate layer 1B, form encapsulant pattern 7 and patterns of conductive materials 7, and disperse (dry dispersion) technology to disperse the slit control material through dry type.The slit control material can be processed by 6 μ m baton rounds.Also can use the fine pearl of quartz type (silica type micro-pearl).
On the precalculated position of substrate 1A and 1B, place horizontal direction matching film 5h each other with the formation unit, and under the state of pressurization, heat-treat to solidify encapsulant 6.
Through scriber line glass substrate, and be divided into the dummy cell of preliminary dimension and shape through disconnection.
Through using the liquid crystal 3x that fill process capillaceous will contain the nano level metal particle to be filled in the dummy cell, use end seal material seal filling point then.After this, cutting (chamfer) and glass cleaning substrate are to form liquid crystal cells 101c.In this manual, be not known as liquid crystal cells with the structure of Polarization filter.
The liquid crystal of the nanosize metal-containing particle that is filled below is described.For example, can use LC4 (birefringence n:0.118, anisotropy specific inductive capacity Δ ε: 9.2), LC4 normally is used for the liquid crystal of STN, and can be from Dai Nippon Printing Co, Ltd. company obtains.Can obtain shaft-like nanoscale gold (Au) particle of minor axis 10 to 20nm, major axis 50 to 100nm from MitsubishiMaterials Coperation company.Can process the liquid crystal LC4+Au (liquid crystal that hereinafter referred to as contains nm of gold) that contains the nanoscale gold grain through the nanoscale gold grain that in liquid crystal LC4, adds 0.5 weight %.
Make the sample S1 that uses the liquid crystal that contains nm of gold to process liquid crystal cells 101c (the liquid crystal cells 101c that hereinafter referred to as contains nm of gold).Be used for contrast, also made the sample SC1 that is filled with liquid crystal LC4 and does not use the liquid crystal cells 101c of nanoscale gold grain.The transmissivity of measuring samples S1 and SC1.
Fig. 3 A shows measuring system.Detect the irradiates light that sends from the light source 9 of band monochromator through detecting device 10.When not having object between light source 9 and the detecting device 10, light intensity is made as 100%.When liquid crystal cells 101c being placed between light source 9 and the detecting device 10 not making alive, measure transmitted lights with detecting device 10, the relative light intensity of gained is transmissivity (%).
Fig. 4 shows sample S1 and the transmitted spectrum of SC1 from the visible light scope near infra red region.The near infrared ray transmittance rate of adding the sample S1 of nanoscale gold grain is lower than the transmissivity of comparative sample SC1.Thus, should understand the liquid crystal absorption near infrared ray that contains nm of gold.Because first embodiment is a yellow mode, so pay close attention to yellow, at 780nm or lower visible-range, the transmissivity of sample S1 and comparative sample SC1 does not have essence difference.Can think thus, add the nanoscale gold grain the not influence of transmissivity of liquid crystal in yellow.
Mode with cross Nicols (crossed Nicol) is connected Polarization filter 8 with each liquid crystal cells 101c, to process STN type liquid crystal display cells 101.
Under the condition that the voltage of optimizing, 1/64 dutycycle drive, measure low temperature (20 with-30 degrees centigrade) response characteristic of the liquid crystal display cells of processing 101.
Fig. 3 B shows measuring system.LCD-5000 (Ohtsuka Electronics Co., Ltd. company) is used to measure.At first, along with applying voltage, through detecting device 10 detection light source 9 emission and light that pass liquid crystal display cells 101, with the measuring voltage comparative.Obtain to obtain the optimization voltage of maximum-contrast according to the characteristic of measuring.To liquid crystal display cells 101 irradiation near infrared rays, measure the response characteristic of its optimization voltage at low temperatures from dorsal part.The LED of emission wavelength 940nm, output power 50mW is used to send near infrared ray.Distance between liquid crystal cells and the LED is about 50mm.Measure respectively that (irradiation time is designated as " 0 ") before the near infrared ray irradiation beginning, irradiation take place after 1 minute, 3 minutes, 5 minutes response, and subsequently each response is compared.
The sample S1 that Fig. 5 A and Fig. 5 B show the liquid crystal display cells of having filled LC4+Au-20 with the table of response time of-30 degrees centigrade.In each table, irradiation time representes to shine the near infrared time.The response time (prolong and shorten) of relatively depending on the near infrared ray irradiation time.Shown in Fig. 5 A and Fig. 5 B, and compare without near infrared ray irradiation, the liquid crystal display cells of use liquid crystal LC4+Au has quicker response when near infrared ray shine.Compare with 1 minute situation of irradiation, do not have essence difference through the near infrared ray irradiation 3 minutes response time during with 5 minutes, the response time then becomes than the situation of shining without near infrared ray soon at least 8%.Therefore, we can say that one minute irradiation is enough to obtain to accelerate the effect of response speed.Process the liquid crystal cells of difference corresponding diagram 5A and Fig. 5 B independently of one another, and without optimization; Therefore the response time in two tables can not compare each other.According to The above results, can think that this is because of nanoscale gold grain absorption near infrared ray, and the near infrared energy that absorbs becomes the heat energy of heating fluid crystal layer through adding the response time that nanogold particle can shorten liquid crystal to liquid crystal.
(second embodiment)
Fig. 6 shows vertical orientation type liquid crystal display cells second embodiment of the invention.Below the main difference of explaining first embodiment and second embodiment.On dielectric film 4, form vertical orientation film 5v.For example, the use SE-1211 that can obtain from Nissan Chemical Industries Ltd. company is as vertical orientation film 5v.Carry out the friction of vertical orientation film 5v, so that upper substrate and infrabasal plate are not parallel.The method that discloses among the JPA 2005-234254 can be used to obtain uniform single domain orientation.And the allocating process method of alignment film is not limited to friction process.And light orientation method, ion beam orientation method, beam-plasma orientation method, inclination vapour deposition method etc. may be used to the allocating process of alignment film.
For example, the diameter that contains several number percents is that the ES-7500 of the spun glass of 3.9 μ m can be used for encapsulant 6, can obtain this ES-7500 from Mitsui chemical Inc company.The diameter that contains several number percents is that the ES-7500 of the gold goal of 4.4 μ m can be used as conductive material.Diameter is that the baton round of 3.75 μ m can be used as the slit control material.
3z is filled into liquid crystal cells with vertical orientation type liquid crystal.For example, the use liquid crystal M4 commonly used that is used for vertical orientation LCD (birefringence n:0.094, the anisotropic specific inductive capacity Δ ε :-3.3) that can obtain from Merck Ltd. company.Can be from Ube Industries, Ltd. company obtains the nanoscale Ag/Pd alloying pellet (nanometer Ag/Pb alloying pellet hereinafter referred to as) of the alloying pellet of the Ag that is of a size of 2nm to 10nm and Pb.In liquid crystal M4, add above-mentioned nanometer Ag/Pb alloying pellet of 0.1 weight %, contain the liquid crystal M4+Ag/Pd of nanometer Ag/Pb alloying pellet, thereby form vertical orientation type liquid crystal 3z with manufacturing.
The sample S2 of vertical orientation liquid crystal cells processes through the liquid crystal M4+Ag/Pb that use contains nanometer Ag/Pb alloying pellet.Through filling the liquid crystal M4 that does not add nanometer Ag/Pb alloying pellet, process comparative sample SC2, be used for comparison.
Fig. 7 shows the sample S2 and the transmitted spectrum of SC2 from the visible-range to the near infra red region of liquid crystal cells.Measure transmitted spectrum through the measuring system shown in Fig. 3 A.As shown in the figure, SC2 compares with comparative sample, and the sample S2 of liquid crystal cells that has added the liquid crystal M4+Ag/Pb that contains nanometer Ag/Pb alloying pellet is lower in the near infra red region transmissivity.Unique difference of sample S2 and comparative sample SC2 is exactly whether to add nanometer Ag/Pb alloying pellet.Can think the light in nanometer Ag/Pb alloying pellet absorption near infrared ray scope.
At visible-range, the transmissivity of sample S2 and comparative sample SC2 much at one; Therefore, can think the light that the liquid crystal cells that is added with the liquid crystal M4+Ag/Pb that contains nanometer Ag/Pb alloying pellet and liquid crystal cells M4 transmission are measured much at one.And the reason of transmitted spectrum fluctuation is to have the interference of depending on liquid crystal cell thickness among Fig. 7.
Through the mode with cross Nicols connects Polarization filter in the both sides up and down of liquid crystal cells, and with this wave filter towards frictional direction rotation 45 degree, process common-black type vertical orientation liquid crystal display cells.Can be to the additional viewing angle compensation plate of Polarization filter.
Optimizing under voltage, the 1/4 dutycycle drive condition, measure the response characteristic of sample S2 under low temperature (30 degrees centigrade) of liquid crystal display cells through the measuring system shown in Fig. 3 B.
Fig. 8 shows sample S2 and depends on the table as the response time of the irradiation time of parameter.Be used for shining the identical of near infrared LED and first embodiment.From this table be appreciated that through the irradiation near infrared ray can shorten the response time about at least 14%.Shine after 1 minute roughly the same with the response time of irradiation after 3 minutes.The response time of shining after 5 minutes is short according to the response time of penetrating after 1 minute.Can also be through in vertical orientation LCD, adding the effect that metallic particles obtains shortening the response time.
(another example of the nano level metal particle that will add)
Although can use all types of nano-metal particles in embodiments of the present invention, can use thallium as another nano level metal particle, obtain to shorten the effect of response time to utilize it.Through add the nanometer thallium particle of 0.1 weight % to vertical orientation type liquid crystal M4, process the sample S2a of vertical orientation type liquid crystal display cells.The same in the method for making of vertical orientation type liquid crystal display cells and measuring method and second embodiment.
Fig. 9 shows sample S2a response time of-30 degrees centigrade.Through the irradiation near infrared ray, the response time shortens about 10% at least.Much at one, therefore, enough irradiation times are about 1 minute in the time of 1 minute for response time after the near infrared ray irradiation surpasses 1 minute and near infrared ray irradiation.
The another example of the nano-metal particle of response time can be shortened and use REE (scandium and yttrium) and transition metal (nickel etc.) can be mentioned.These nano level metal particles have good dissolubility in liquid crystal.
In the above-described embodiment, the dosage of nano level metal particle is 0.1 weight % to 0.5 weight %.Because, can think that lowest dose level is about 0.02 weight % with the effect that the about 0.1 weight % of dosage can fully obtain to shorten the response time.And if dosage is too big, liquid crystal property possibly change, and therefore can think that maximum dose level is 1.0 weight %.
Preferably select the size of nano level metal particle in the scope of 1nm to 100nm.According to thinking that if be of a size of 1nm or littler, the effect of absorption near infrared ray is insufficient.And if be of a size of 100nm or bigger, then think to be difficult in the medium-term and long-term stable dispersion of liquid crystal.
As implement described in the mode, through shine the liquid crystal layer of the liquid crystal that has added the nano level metal particle with wavelength 3 μ m or shorter near infrared ray, can shorten the response time at least 8% of liquid crystal display cells.
Explained the embodiment that in liquid crystal layer, adds the nano level metal particle.Also can such as alignment film near the film of liquid crystal layer in add the material of wave band with absorption near infrared ray scope.
(the 3rd embodiment)
Figure 10 shows twisted nematic (TN) liquid crystal display cells 101 of third embodiment of the invention.With the difference of mainly explaining with the stn liquid crystal unit of first embodiment.
Similar in glass substrate 1A and 1B, ITO electrode pattern 2, output line 2t and dielectric film 4 and the liquid crystal cells shown in Figure 2.
In TN-LCD, tilt angle preferably lower (becoming 2 degree or lower with real estate).Use can be from Nissan Chemical Industries, and the SE-410 that Ltd. company obtains is as the material of horizontal direction matching film.Through mixing, form the near-infrared-absorbing material that adds 5 weight % in the material at the horizontal alignment film of liquid state.The details of near-infrared-absorbing material will be described below.On dielectric film 4, form horizontal direction matching film 5x through spin coat method, and with the pattern of dielectric film 4 much at one.For example; Implement spin coat method with 30 seconds spinner revolution of the rotating speed of 2000rpm rotation, with generate thickness be about 700
horizontal direction matching film 5x.In addition, can pass through flexographic printing, inkjet printing etc. and form horizontal direction matching film 5x.
Horizontal direction matching film 5x is implemented friction process.Friction process is a technology of coming level of friction alignment film 5x of rolling fast and wrapping up with cloth.Implement this technology, be set to 90 degree (left-handed) with the liquid crystal 3 in the two-layer substrate about inciting somebody to action.
Identical in the filling of the dispersion of the formation of the formation of encapsulant 6, conductive material 7, slit control material, the formation of dummy cell, liquid crystal and sealing technology and first embodiment.Through arranging that on the outer surface of last lower glass substrate the Polarization filter of arranging with the mode of parallel or cross Nicols 8 forms liquid crystal display cells 101.
Make the sample S3A of liquid crystal cells and the sample S3B of liquid crystal cells; The alignment film of the sample S3A of liquid crystal cells is added with benzo two furan ketone compounds (materials A hereinafter referred to as) as near-infrared-absorbing material; The alignment film of the sample S3B of liquid crystal cells adds polyaniline (material B hereinafter referred to as) as near-infrared-absorbing material.And, also made the sample SC3 that does not add the liquid crystal cells of near-infrared-absorbing material, as comparative sample to alignment film.Under the state of this liquid crystal cells, there is not polarizing coating.
Measure the transmitted spectrum of sample S3A, S3B and the SC3 of liquid crystal cells 101c through the measuring system shown in Fig. 3 A.
Figure 11 shows the transmitted spectrum of each sample from the visible-range to the near infra red region.The sample S3A of liquid crystal cells and the transmissivity of S3B are low near infra red region than sample SC3 frequently near infra red region.Can think that materials A and material B have absorbed the light of near infrared range.
Figure 12 shows voltage-transmissison characteristic.Voltage-the transmissison characteristic of the comparative sample SC3 of liquid crystal display cells and the sample S3A of liquid crystal display cells and voltage-transmissison characteristic of S3B do not have significant difference, and wherein the sample S3A of liquid crystal display cells and the alignment film of S3B are added with near-infrared-absorbing material.
Can obtain to have the optimization voltage of maximum-contrast according to voltage-transmissison characteristic of measuring.Near infrared ray under low temperature (30 degrees centigrade), optimization voltage, 1/4 dutycycle drive condition, is measured response characteristic from the liquid crystal layer of back side illuminaton liquid crystal display cells 101.Response characteristic when measuring after (irradiation time is designated as " 0 ") before the near infrared ray irradiation beginning, irradiation 1 minute, 2 minutes, 3 minutes, 4 minutes and 10 minutes respectively.
Figure 13 shows the response characteristic of each sample.The longitudinal axis is represented the rise time (millisecond), transverse axis represent near infrared ray LED irradiation time (minute).The response speed of sample S3A and S3B is fast than sample SC3 frequently, that is, the rise time of sample S3A and S3B is compared the weak point than sample SC3.The response time of sample S3A and S3B has begun to shorten rapidly and tend towards stability in 1 minute in the near infrared ray irradiation, therefore, we can say that the response time shortens rapidly behind the primer fluid crystal display element.
Be appreciated that; Through adding the response time that near-infrared-absorbing material has shortened liquid crystal to alignment film; This is that the near infrared energy of absorption has changed into the heat energy of the heating liquid crystal layer adjacent with alignment film because the near-infrared-absorbing material in the alignment film has absorbed near infrared ray.
(other embodiment of near-infrared-absorbing material)
In addition, materials A solubleness in organic solvent is high, material B good heat resistance (about 300 degrees centigrade).Can use the material that has with materials A and material B similar quality as near-infrared-absorbing material.
Can use following material as near-infrared-absorbing material: benzo two furanones (benzodifuranone) compound; Polyaniline; Cyanine class pigment; Polymethine class pigment (polymethin group pigment); Phthalocyanine color; Ammonium pigment; Diimmonium pigment; The dithionic acid nickel compound; Triazo-compound; Imonium class pigment; Diimmonium class pigment; Triallyl methane class pigment; Naphthoquinones class pigment; Anthraquinone class pigment; Side's acids pigment; Phthalocyanine pigment; The naphthalene phthalocyanine pigment; And dithionic acid nickel complex (nickel dithiolene complex).
Figure 14 shows the outdoor display board that liquid crystal display is housed, and it can be counted as application example.Outdoor display board needs to show fast at low temperatures.For example, detect to find that for detecting device the driver has surpassed speed limit, be used to warn this driver and need demonstrate the warning such as " deceleration " time,, possibly before warning shows, opened by automobile if the liquid crystal response time is slow.At cold district, if shorten the response time (improving the travelling speed of liquid crystal display) of liquid crystal then Presentation Function is remained under the good situation.
Break at low temperatures when being added in the voltage on the liquid crystal display cells 101, if open infrared LED, then liquid crystal layer can not cool off, and makes liquid crystal display cells 101 to respond to the shows signal of importing fast.
Though can add near-infrared-absorbing material to alignment film, the film that add near-infrared-absorbing material is not limited to alignment film.Add near-infrared-absorbing material also can for dielectric film 4, this film is the basement membrane of alignment film 5.Can form the basement membrane that has added near-infrared-absorbing material, as the basement membrane of the alignment film of non-said alignment film and dielectric film.
In the 3rd embodiment, explained TN type liquid crystal display cells.This embodiment can be applied to the liquid crystal display cells of other types, like super (S) TN type, vertical orientation type, plate intra (IPS) type, optical compensation curved (OCB) type, polymer network (PN) type, host and guest (GH) type etc.
And, except as the 3rd embodiment, adding the near-infrared-absorbing material, also can as first embodiment and second embodiment, add near-infrared-absorbing material to liquid crystal layer near the film the liquid crystal layer.
Combined preferred implementation to describe the present invention.The present invention is not limited in above-mentioned embodiment.
Figure 15 A and Figure 15 B show other embodiment of light unit 102.In the embodiment shown in Figure 15 A, have the light that sends the two sidelight unit of cold-cathode fluorescence lamp and infrared light supply and absorbed by liquid crystal display cells 101 through the side of optical plate 103b.
In the example shown in Figure 15 B; Light unit 102 is placed in before the liquid crystal display cells 101; Have the light that sends the two sidelight unit of cold-cathode fluorescence lamp and infrared light supply and absorbed by liquid crystal display cells 101, inject liquid crystal display cells 101 (light unit promptly) once more through the light of reflecting surface 104 reflections that place liquid crystal display cells 101 back sides through optical plate 103b.Usually, reflective liquid crystal display device does not have the backlight such as incandescent lamp, so liquid crystal layer can not be heated.Yet, like the described infrared light supply of these embodiment, can pass through infrared ray heating fluid crystal layer through equipment.Its heating energy consumption is low, and can keep response characteristic.
Can be with vacuum packing or drip (ODF) filling liquid crystal.When using vacuum packing, only need a filling point.When making by drip, do not need filling point, and fill and before upper and lower base plate connects, to accomplish.
In order to reduce because of Polarization filter absorbs the thermal efficiency loss that causes, can use polarization beam apparatus, the polarized light that radiation source is sent is parallel with the axis of homology of Polarization filter.And obviously those skilled in the art can carry out various changes, improvement, combination etc.
The application is based on Japanese patent application 2007-150124 number and Japanese patent application 2007-332293 number of submitting on Dec 25th, 2007 of submission on June 6th, 2007, and the full content with them is incorporated herein by reference.
Claims (7)
1. liquid crystal display, this liquid crystal display comprises:
Liquid crystal display cells, it comprises: a pair of glass substrate respect to one another; Transparent electrode pattern, each transparent electrode pattern forms on the facing surfaces of each glass substrate of said a pair of glass substrate; Membrane structure, each membrane structure comprises alignment film, and is formed on each glass substrate of said a pair of glass substrate, and covers said transparency electrode; And the liquid crystal layer that between said a pair of glass substrate, keeps;
And
Light source, it can shine near infrared ray to said liquid crystal display cells,
And wherein said liquid crystal layer comprises that the nano level metal particle is as near-infrared-absorbing material.
2. liquid crystal display as claimed in claim 1 wherein adds the said nano level metal particle of 0.02 weight % to 1.0 weight % to the liquid crystal of the said liquid crystal layer of main formation.
3. liquid crystal display as claimed in claim 1, wherein said nano level metal particle are a kind of in gold, silver/lead alloy, the thallium.
4. liquid crystal display as claimed in claim 3 wherein adds the said nano level metal particle of 0.02 weight % to 1.0 weight % to the liquid crystal of the said liquid crystal layer of main formation.
5. liquid crystal display as claimed in claim 1, wherein said membrane structure comprises near-infrared-absorbing material.
6. liquid crystal display as claimed in claim 5, the said near-infrared-absorbing material that comprises in the wherein said membrane structure are a kind of in benzo two furan ketone compounds, polyaniline, cyanine class pigment, polymethine class pigment, phthalocyanine color, ammonium pigment, diimmonium pigment, dithionic acid nickel compound, triazo-compound, imonium class pigment, triallyl methane class pigment, naphthoquinones class pigment, anthraquinone class pigment, square acids pigment and the dithionic acid nickel complex.
7. liquid crystal display as claimed in claim 6, the said membrane structure of wherein having added said near-infrared-absorbing material are formed in the alignment film of said a pair of glass substrate on both.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007150124A JP4942037B2 (en) | 2007-06-06 | 2007-06-06 | Liquid crystal display |
| JP2007150124 | 2007-06-06 | ||
| JP2007-150124 | 2007-06-06 | ||
| JP2007-332293 | 2007-12-25 | ||
| JP2007332293A JP5237625B2 (en) | 2007-12-25 | 2007-12-25 | Liquid crystal display device and manufacturing method thereof |
| JP2007332293 | 2007-12-25 |
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| Publication Number | Publication Date |
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| CN101320162A CN101320162A (en) | 2008-12-10 |
| CN101320162B true CN101320162B (en) | 2012-11-07 |
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| CN2008101089267A Expired - Fee Related CN101320162B (en) | 2007-06-06 | 2008-06-06 | Liquid crystal display device capable of low temperature use |
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|---|---|---|---|---|
| JP5566109B2 (en) * | 2007-10-25 | 2014-08-06 | スタンレー電気株式会社 | Liquid crystal display |
| JP5253981B2 (en) * | 2008-11-27 | 2013-07-31 | スタンレー電気株式会社 | Liquid crystal display |
| CN102328592A (en) * | 2011-07-28 | 2012-01-25 | 奇瑞汽车股份有限公司 | Low-temperature heating system of liquid crystal display screen of automotive combined instrument |
| CN103778864A (en) * | 2012-10-25 | 2014-05-07 | 严守权 | Laser scattering displayer |
| CN105572946A (en) * | 2016-03-14 | 2016-05-11 | 京东方科技集团股份有限公司 | Low-temperature-resistant display device |
| JP6787681B2 (en) * | 2016-03-30 | 2020-11-18 | シチズンファインデバイス株式会社 | Liquid crystal display device |
| CN109496278A (en) * | 2017-05-08 | 2019-03-19 | 京东方科技集团股份有限公司 | Display base plate, liquid crystal display panel, liquid crystal display device and its operating method |
| CN109050029A (en) * | 2018-06-04 | 2018-12-21 | 刘丙炎 | A kind of vial rapid-curing cutback character printing method |
| JP7193270B2 (en) * | 2018-08-22 | 2022-12-20 | スタンレー電気株式会社 | Vehicle lighting control device, vehicle lighting control method, vehicle lighting system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6133979A (en) * | 1996-09-23 | 2000-10-17 | Lg Electronics Inc. | Liquid crystal display device with internal heating element |
| CN2503560Y (en) * | 2001-09-21 | 2002-07-31 | 深圳深辉技术有限公司 | Liquid crystal display module able to normal working at ultra-low temp. |
| JP2005024866A (en) * | 2003-07-02 | 2005-01-27 | Casio Comput Co Ltd | Liquid crystal display |
| CN1979267A (en) * | 2005-12-07 | 2007-06-13 | 群康科技(深圳)有限公司 | Liquid crystal display device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08297303A (en) * | 1995-04-27 | 1996-11-12 | Casio Comput Co Ltd | Liquid crystal display element |
| JP2006292970A (en) * | 2005-04-08 | 2006-10-26 | Nano Opt Kenkyusho:Kk | Liquid crystal electro-optical element and method for stabilizing temperature characteristics thereof |
-
2007
- 2007-06-06 JP JP2007150124A patent/JP4942037B2/en not_active Expired - Fee Related
-
2008
- 2008-06-06 CN CN2008101089267A patent/CN101320162B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6133979A (en) * | 1996-09-23 | 2000-10-17 | Lg Electronics Inc. | Liquid crystal display device with internal heating element |
| CN2503560Y (en) * | 2001-09-21 | 2002-07-31 | 深圳深辉技术有限公司 | Liquid crystal display module able to normal working at ultra-low temp. |
| JP2005024866A (en) * | 2003-07-02 | 2005-01-27 | Casio Comput Co Ltd | Liquid crystal display |
| CN1979267A (en) * | 2005-12-07 | 2007-06-13 | 群康科技(深圳)有限公司 | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4942037B2 (en) | 2012-05-30 |
| JP2008304589A (en) | 2008-12-18 |
| CN101320162A (en) | 2008-12-10 |
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