CN101923227A - Thermotropic display element and thermotropic display device - Google Patents
Thermotropic display element and thermotropic display device Download PDFInfo
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- CN101923227A CN101923227A CN 201010262550 CN201010262550A CN101923227A CN 101923227 A CN101923227 A CN 101923227A CN 201010262550 CN201010262550 CN 201010262550 CN 201010262550 A CN201010262550 A CN 201010262550A CN 101923227 A CN101923227 A CN 101923227A
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Abstract
The invention provides a thermotropic display element, which comprises a sealed shell, a first heating element and a second heating element, wherein the sealed shell comprises an upper substrate and a lower substrate which are oppositely arranged; the first heating element is arranged on the upper substrate; and the second heating element is arranged on the lower substrate. The upper substrate has a semitransparent structure and comprises a first surface and a second surface opposite to the first surface. The thermotropic display element also comprises a color material layer, wherein the color material layer is arranged inside the sealed shell and is converted through phase change between the upper substrate and the lower substrate under alternative heating action of the first heating element and the second heating element. The invention also provides a thermotropic display device which applies the thermotropic display element.
Description
Technical field
The present invention relates to a kind of thermotropic display element and use the thermotropic display device of this thermotropic display element.
Background technology
At present, Electronic Paper is a kind of display device that does not need backlight relatively more commonly used.Electronic Paper is a kind of novel information carrier, owing to can substitute traditional paper, has a wide range of applications and huge commercial value in multiple fields such as advertisement, newspaper, books.The Electronic Paper of Chu Xianing mainly adopts electrophoretic display technology in the market.Electrophoretic display technology comprises microcapsule-type electrophoretic techniques, little glass of type electrophoretic techniques and electronics powder fluid technology.
The microcapsule-type electrophoretic techniques is the charged particle of black, white dichromatism and electrophoretic medium to be packaged in the microencapsulation drop structure form microcapsules, conductive backings and transparency conducting layer is set two ends respectively up and down at each microcapsules then.By conductive backings and transparency conducting layer microcapsules are applied the lifting moving that electric field is controlled different electric charge black and white particles in the microcapsules, to present the display effect of black and white monochrome.
Little glass of type electrophoretic techniques is that coating pressing mold liquid on the plastic sheeting of transparency conducting layer is being arranged, produce little glass of array through the molded journey of continous way minute-pressure, after inserting the white particle of electrophoretic medium and positively charged, the coating seal fluid is solidified again, and then conductive backings and transparency conducting layer are set.Form positive negative electric field by power supply to conductive backings and transparency conducting layer and come the white particle of rotating band positive electricity to move, form the pattern that eyes are seen.
Electronics powder fluid technology be with electrophoretic medium and the band positive and negative charge the black-and-white two color powder-tight between two base plates with electrode.By applying electric field having between two base plates of electrode, make respectively black-and-white two color flow of powder, to reach show image with positive and negative charge.
Yet owing to all need to use charged particle in the Electronic Paper of above-mentioned application electrophoretic display technology, charged particle generally only be white and two kinds of black, causes Electronic Paper can not realize the colour demonstration.
Summary of the invention
In view of this, the necessary cost that provides is lower, can realize colored thermotropic display element and the display device that shows.
A kind of thermotropic display element, it comprises: a closure casing, this closure casing comprise a upper substrate and an infrabasal plate, and this infrabasal plate and upper substrate are oppositely arranged; One first heating element, this first heating element is arranged on this upper substrate; One second heating element, this second heating element is arranged on this infrabasal plate; Wherein, described upper substrate is translucent structure, and it comprises a first surface and one and the first surface opposing second surface; This thermotropic display element further comprises a colored materials layer, and this colored materials layer is arranged in this closure casing and under the alternately heat effect of first heating element and second heating element and changes by phase transformation position between upper substrate and infrabasal plate.
With respect to prior art, thermotropic display element provided by the invention and thermotropic display device are by heating element heating colored materials layer, the colored materials layer is undergone phase transition become gas, thereby the colored materials layer of this gaseous state is realized colored the demonstration by evolution, because the color of colored materials layer is abundanter, therefore, the color of this thermotropic display element is than horn of plenty.
Description of drawings
Fig. 1 is the schematic top plan view of the thermotropic display element that first embodiment of the invention provided.
Fig. 2 is the side sectional view of the thermotropic display element that first embodiment of the invention provided.
Fig. 3 is for being used as the stereoscan photograph of the carbon nano-tube membrane of heating element in the thermotropic display element of first embodiment of the invention.
Fig. 4 is for being used as the stereoscan photograph of the carbon nano-tube waddingization film of heating element in the thermotropic display element of first embodiment of the invention.
Fig. 5 is for being used as the stereoscan photograph of the carbon nano-tube laminate of heating element in the thermotropic display element of first embodiment of the invention.
Fig. 6 is the side-looking diagrammatic cross-section of the thermotropic display element that second embodiment of the invention provided.
Fig. 7 is the schematic side view of thermotropic display device provided by the present invention.
Fig. 8 is the structural representation that first battery lead plate is electrically connected with first heating element of thermotropic display element in Fig. 7 thermotropic display device.
Fig. 9 is the structural representation that second battery lead plate is electrically connected with second heating element of thermotropic display element in Fig. 7 thermotropic display device.
The main element symbol description
Thermotropic display element 100,200
Closure casing 102,202
First heating element 106,206
Second heating element 108,208
Colored materials layer 110,210
First electrode 114,214
Second electrode 116,216
Space 120,220
Thermotropic display device 40
First battery lead plate 42
Second battery lead plate 44
The first row electrode 424
Second column electrode 442
Embodiment
Below with reference to accompanying drawing thermotropic display element of the present invention and thermotropic display device are done further
Describe in detail.
See also Fig. 1 and Fig. 2, first embodiment of the invention provides a kind of thermotropic display element 100, and this thermotropic display element 100 comprises a closure casing 102, and this closure casing 102 comprises a upper substrate 1022 and an infrabasal plate 1024; This closure casing 102 comprises a space 120, and this space 120 is between upper substrate 1022 and infrabasal plate 1024; One colored materials layer 110, this colored materials layer 110 is arranged in the space 120, and contacts with this infrabasal plate 1024, and this colored materials layer 110 is the solid colored materials, and it undergoes phase transition at a certain temperature and becomes gaseous state; One first heating element 106, this first heating element 106 is arranged at upper substrate; One second heating element 108, this second heating element 108 is arranged at infrabasal plate; First heating element 106 and second heating element 108 all are used to heat colored materials layer 110.This thermotropic display element 100 further comprises at least two first electrodes 114 and at least two second electrodes 116.These at least two first electrodes 114 are electrically connected with this first heating element 106 respectively, and these at least two second electrodes 116 are electrically connected with this second heating element 108 respectively.
The shape of described closure casing 102 is not limit, and can be structures such as cube, rectangular parallelepiped, triangular prism, right cylinder.Described closure casing 102 further comprises side plate 1026, and closure casing 102 is formed by described upper substrate 1022, described infrabasal plate 1024 and side plate 1026 encapsulation.The shape of described upper substrate 1022, infrabasal plate 1024 or side plate 1026 is not limit, and can be the plane tabular structure, can be curved slab shape structure yet.In the present embodiment, described closure casing 102 is a cube structure, and described upper substrate 1022 and this infrabasal plate 1024 are oppositely arranged.This closure casing 102 comprises four side plates 1026, and these four side plates 1026 are arranged between upper substrate 1022 and the infrabasal plate 1024.Described upper substrate 1022, infrabasal plate 1024 and four side plate 1026 encapsulation form this closure casing 102, and described space 120 is surrounded by upper substrate 1022, infrabasal plate 1024 and four side plates 1026.Described upper substrate 1022 is a translucent substrate, and described upper substrate 1022 comprises a first surface 1022a and a second surface 1022b, and described second surface 1022b is intended for this closure casing 102 inside.At least one is a rough surface among described first surface 1022a and the second surface 1022b, promptly comprises three kinds of situations: described first surface 1022a is a rough surface, and described second surface 1022b is a plane; Described second surface 1022b is a rough surface, and described first surface 1022a is a plane; Described first surface 1022a and second surface 1022b are rough surface.In the present embodiment, described second surface 1022b is a rough surface, thereby the penetrability of this upper substrate 1022 is reduced, and transmittance probably is about 40%～80%.The material of described upper substrate can or have the transparent polymer material of rough surface for frosted glass (ground glass or sand blasting glass etc.).Described transparent polymer material comprises polyphenyl dioctyl phthalate glycol ester (PET), polyimide (PI), polystyrene (PS), polypropylene (PP), tygon (PE), polychloroprene (PC) or Polyvinylchloride (PVC).In the present embodiment, upper substrate 1022 is the frosted glass substrate that a single face is thrown hair.The material of described infrabasal plate 1024 and four side plates 1026 is an insulating material, can be pottery, plastics, rubber etc.The material of described upper substrate 1022 and infrabasal plate 1024 is preferably resistant to elevated temperatures material.
The material of described colored materials layer 110 is a colored materials, and this colored materials is in solid state at normal temperatures.Be heated under the fixed temperature, this colored materials layer 110 undergoes phase transition and becomes gaseous state.The material of this colored materials layer 110 can be for the solid that easily distils, as iodine or naphthalene etc.The material of this colored materials layer 110 can also be easy distillation colored pigment, as indigo, and gentian violet, magenta, lemon yellow etc.This colored materials layer 110 is arranged at 120 inside, space.
Described first heating element 106 can be arranged at upper substrate 1022 first surface 1022a.Described first heating element 106 also should be a transparent layered structure.Described first heating element 106 can be a tin indium oxide (ITO) film or a carbon nano-tube stratiform structure.Described second heating element 108 can be arranged at the outside surface or the inside surface of infrabasal plate 1024.The outside surface of described infrabasal plate 1024 refers to a surface that is positioned at closure casing 102 outsides of infrabasal plate 1024, and the inside surface of described infrabasal plate 1024 refers to a surface that is positioned at closure casing 102 inside of infrabasal plate 1024.In the present embodiment, described second heating element 108 is arranged at the outside surface of infrabasal plate 1024, provides heat by this infrabasal plate 1024 to second space 122.This second heating element 108 is a stratiform structure, can be transparent also can be opaque.Described second heating element 108 can be a metal level, an ito thin film or a carbon nano-tube stratiform structure.By the effect of first heating element 106 and second heating element 108, gas-solid phase transformation position conversion between upper substrate 1022 and infrabasal plate 1024 alternately takes place in described colored materials layer 110 in 120 inside, described space.
Described carbon nano-tube stratiform structure comprises one deck carbon nano-tube film at least.When carbon nano-tube stratiform structure comprises at least two-layer carbon nano-tube film, this two-layer at least carbon nano-tube film-stack setting or be arranged side by side.Described carbon nano-tube film comprises equally distributed carbon nano-tube, combines closely by Van der Waals force between the carbon nano-tube.Carbon nano-tube in this carbon nano-tube film is unordered or orderly arrangement.The lack of alignment here refers to that the orientation of carbon nano-tube is irregular, and the orderly arrangement here refers to that the orientation of most at least carbon nano-tube has certain rule.Particularly, when carbon nano-tube film comprised the carbon nano-tube of lack of alignment, carbon nano-tube was twined mutually or isotropy is arranged; When carbon nano-tube stratiform structure comprised orderly carbon nanotubes arranged, carbon nano-tube was arranged of preferred orient along a direction or a plurality of direction.In the present embodiment, preferably, described carbon nano-tube stratiform structure comprises the carbon nano-tube film of a plurality of stacked settings, and this carbon nano-tube stratiform thickness of structure is preferably 0.5 nanometer～1 millimeter.Preferably, this carbon nano-tube stratiform thickness of structure is 100 nanometers～0.1 millimeter.The transparency that is appreciated that carbon nano-tube stratiform structure is relevant with carbon nano-tube stratiform thickness of structure, when carbon nano-tube stratiform thickness of structure more hour, the penetrability of this carbon nano-tube stratiform structure is good more.The unit area thermal capacitance of described carbon nano-tube stratiform structure is less than 2 * 10
-4Every square centimeter of Kelvin of joule.Preferably, the unit area thermal capacitance of described carbon nano-tube stratiform structure can be smaller or equal to 1.7 * 10
-6Every square centimeter of Kelvin of joule.Because the thermal capacitance of carbon nano-tube is less, so the heating element that is made of this carbon nano-tube stratiform structure has thermal response speed faster, can be used for object is carried out Fast Heating.The thermal response speed that is appreciated that carbon nano-tube stratiform structure is relevant with its thickness.Under situation of the same area, carbon nano-tube stratiform thickness of structure is big more, and thermal response speed is slow more; Otherwise carbon nano-tube stratiform thickness of structure is more little, and thermal response speed is fast more.
See also Fig. 3, described carbon nano-tube film can be a carbon nano-tube membrane.This carbon nano-tube membrane is for directly pulling a kind of carbon nano-tube film of acquisition from carbon nano pipe array.The self supporting structure that each carbon nano-tube film is made up of some carbon nano-tube.Described some carbon nano-tube are for being arranged of preferred orient along same direction substantially.The whole bearing of trend that described preferred orientation is meant most of carbon nano-tube in carbon nano-tube film substantially in the same direction.And the whole bearing of trend of described most of carbon nano-tube is basically parallel to the surface of carbon nano-tube film.Further, most carbon nano-tube are to join end to end by Van der Waals force in the described carbon nano-tube film.Particularly, each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend in most of carbon nano-tube of extending substantially in the same direction in the described carbon nano-tube film.Certainly, have the carbon nano-tube of minority random alignment in the described carbon nano-tube film, these carbon nano-tube can not arranged the overall orientation of most of carbon nano-tube in the carbon nano-tube film and be constituted obviously influence.Described self-supporting is that carbon nano-tube film does not need large-area carrier supported, and as long as the relative both sides power of providing support can be unsettled on the whole and keep self membranaceous state, when being about to this carbon nano-tube film and placing (or being fixed in) at interval on two supporters being provided with of a fixed range, the carbon nano-tube film between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting is mainly by existing the continuous Van der Waals force that passes through to join end to end and extend carbon nanotubes arranged and realize in the carbon nano-tube film.
Particularly, most carbon nano-tube of extending substantially in the same direction in the described carbon nano-tube film, and nisi linearity, bending that can be suitable; Perhaps be not fully according to arranging on the bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between the carbon nano-tube arranged side by side in most carbon nano-tube of extending substantially in the same direction of carbon nano-tube film and may have the part contact.
The thickness of described carbon nano-tube membrane is 0.5 nanometer～100 micron, and width is relevant with the size of the carbon nano pipe array that pulls this carbon nano-tube membrane, and length is not limit.Concrete structure of described carbon nano-tube membrane and preparation method thereof saw also people such as Fan Shoushan in application on February 9th, 2007, in disclosed CN101239712A China's Mainland publication application in Augusts 13 in 2008.For saving space, only be incorporated in this, but all technology of described application disclose the part that also should be considered as the exposure of the present patent application technology.
When described carbon nano-tube stratiform structure adopts the carbon nano-tube membrane, it can comprise the multilayer carbon nanotube membrane of stacked setting, and along the axial formation one intersecting angle α of carbon nano-tube in each layer, α spends (0 °≤α≤90 °) more than or equal to 0 degree smaller or equal to 90 between the carbon nano-tube in the adjacent two layers carbon nano-tube membrane.Have the gap between described a plurality of carbon nano-tube membrane or between the adjacent carbon nano-tube among carbon nano-tube membrane, thereby form a plurality of micropores in carbon nano tube structure, the aperture of micropore is approximately less than 10 microns.
See also Fig. 4, described carbon nano-tube film can also be a carbon nano-tube waddingization film.The carbon nano-tube film of described carbon nano-tube waddingization film for forming by a waddingization method.This carbon nano-tube waddingization film comprises mutual winding and equally distributed carbon nano-tube.Attract each other, twine by Van der Waals force between the described carbon nano-tube, form network-like structure.Described carbon nano-tube waddingization film isotropy.The length and the width of described carbon nano-tube waddingization film are not limit.Because in carbon nano-tube waddingization film, carbon nano-tube is twined mutually, so this carbon nano-tube waddingization film has good flexible, and is a self supporting structure, can bending fold becomes arbitrary shape and does not break.The area and the thickness of described carbon nano-tube waddingization film are not all limit, and thickness is 1 micron～1 millimeter.
Described carbon nano-tube film can also be for by rolling the carbon nano-tube laminate that a carbon nano pipe array forms.This carbon nano-tube laminate comprises equally distributed carbon nano-tube, and carbon nano-tube is arranged of preferred orient along same direction or different directions.Carbon nano-tube also can be isotropic.Carbon nano-tube in described carbon nano-tube laminate part mutually overlaps, and attracts each other by Van der Waals force, combines closely.Carbon nano-tube in the described carbon nano-tube laminate forms an angle β with the surface of the growth substrate that forms carbon nano pipe array, and wherein, β is more than or equal to 0 degree and smaller or equal to 15 degree (0≤β≤15 °).According to the mode difference that rolls, the carbon nano-tube in this carbon nano-tube laminate has different spread patterns.See also Fig. 5, when when same direction rolls, carbon nano-tube is arranged of preferred orient along a fixed-direction.Be appreciated that carbon nano-tube can be arranged of preferred orient along a plurality of directions when when different directions rolls.This carbon nano-tube laminate thickness is not limit, and being preferably is 1 micron～1 millimeter.The area of this carbon nano-tube laminate is not limit, by the size decision of the carbon nano pipe array that rolls membrane.When the size of carbon nano pipe array is big, can rolls and make larger area carbon nano-tube laminate.
Have the following advantages when adopting carbon nano-tube stratiform structure: one as first heating element 106 or second heating element 108, because carbon nano-tube stratiform structure is made of carbon nano-tube, carbon nano-tube is difficult for oxidized, and therefore the life-span of first heating element 106 or second heating element 108 is longer; Its two, the density of described carbon nano-tube shape structure is less, so the lighter weight of this thermotropic display element 100; Its three, carbon nano-tube stratiform structure has pliability preferably, can bend arbitrarily and is not destroyed, therefore, this thermotropic display element 100 can be made flexible structure; Its four, the thermal capacitance of carbon nano-tube stratiform structure is less, thermal response speed is fast, and thermotropic display element 100 is quick on the draw, and realizes faster display effect and wiping effect.
Described at least two first electrodes 114 are used to connect first heating element 106 and the external circuit, make external circuit pass through these at least two first electrodes 114 and feed electric current to first heating element 106, thereby make this first heating element 106 produce Joule heat, play heat effect.Described at least two first electrodes 114 are arranged at the surface of first heating element 106.Described at least two first electrodes 114 can be arranged at the surface of this first heating element 106 by a conductive adhesive (figure does not show), conductive adhesive is realizing that first electrode 114 is fixed in the surface while of first heating element 106 better, can also make between first electrode 114 and first heating element 106 to keep good electrical contact.This conductive adhesive can be elargol.Described at least two first electrodes 114 are made by conductive material, and its shape is not limit, and can be conducting film, sheet metal or metal lead wire.When these at least two first electrodes 114 are arranged at this first heating element 106 surperficial, for preventing that these at least two first electrodes 114 from influencing the light transmission of first heating element 106, the quantity of this first electrode 114 is preferably two, and this first electrode 114 is that wire or banded structure or first electrode 114 are for being the good material of light transmission.These at least two first electrodes 114 are respectively one deck conducting film.The material of this conducting film can be metal, alloy, indium tin oxide (ITO), antimony tin oxide (ATO), conductive silver glue, conducting polymer or conductive carbon nanotube etc.This metal or alloy material can be the alloy of aluminium, copper, tungsten, molybdenum, gold, titanium, neodymium, palladium, caesium or its combination in any.In the present embodiment, the quantity of first electrode 114 is two, and its material is a strip metal palladium film, and thickness is 5 microns, and these two first electrodes 114 are arranged at the two ends of first heating element 106 respectively, and are parallel to each other.When first heating element 106 adopts a carbon nano-tube stratiform structure, when this carbon nano-tube stratiform structure comprises a plurality of orderly carbon nano-tube, these a plurality of ordered carbon nanotubes axially be basically perpendicular to this at least two first electrodes 114.Further, described at least two first electrodes 114 are electrically connected with external circuit by contact conductor (figure does not show) respectively.
Described at least two second electrodes 116 are used to connect second heating element 108 and the external circuit, make external circuit pass through these at least two second electrodes 116 and feed electric current to second heating element 108, thereby make this second heating element 108 produce Joule heat, play heat effect.Described at least two second electrodes 116 are arranged at the surface of second heating element 108.The material of described at least two second electrodes 116 is identical with the material of first electrode 114, between the set-up mode between second electrode 116 and second heating element 108 and first electrode 114 and first heating element 106 that relation is set is identical.Further, described at least two second electrodes 116 are electrically connected with external circuit by contact conductor (figure does not show) respectively.
The principle of work of this thermotropic display element 100 is based on colored materials layer 110 and is arranged at replacing under the heat effect by phase transformation position conversion between upper substrate 1022 and infrabasal plate 1024 in this closure casing and at first heating element 106 and second heating element 108, be specially: at non-show state, colored materials layer 110 is positioned at described infrabasal plate, because upper substrate 1022 is half transparent configuration, there is certain distance between colored materials layer 110 and the upper substrate 1022, therefore can't passes through upper substrate 1022 Show Colors.When passing through infrabasal plate 1024 to 110 heating of colored materials layer by second heating element 108, this colored materials layer 110 is undergone phase transition under a fixed temperature become gaseous state, the colored materials layer 110 of this gaseous state touches upper substrate 1022, because the temperature of upper substrate 1022 is lower, the colored materials layer 110 of this gaseous state becomes again solid-state on the second surface 1022b of upper substrate 1022.At this moment, because upper substrate 1022 be half transparent configuration, colored materials layer 110 can show the color of color material layer 110 by upper substrate 1022 after being formed on the surface of upper substrate 1022, thereby can realize the color demonstration of thermotropic display element 100.And because the second surface 1022b of upper substrate 1022 is a rough surface, the colored materials layer more easily adheres on this second surface 1022b.When thermotropic display element 100 needs erasure color, by the colored materials layer 110 on first heating element, the 106 heating upper substrates 1022, colored materials layer 110 is undergone phase transition under a fixed temperature become gaseous state, because the temperature of infrabasal plate 1024 is lower, the colored materials layer 110 of this gaseous state becomes again solid-state on the surface of infrabasal plate 1024.At this moment,, there is certain distance between colored materials layer 110 and the upper substrate 1022, therefore can't pass through upper substrate 1022 Show Colors, thereby the color that has realized thermotropic display element 100 wiped because upper substrate 1022 is half transparent configuration.
Thermotropic display element provided by the invention has the following advantages: first, described thermotropic display element and thermotropic display device are by heating element heating colored materials layer, the colored materials layer is undergone phase transition become gas, thereby the colored materials layer of this gaseous state is realized colored the demonstration by evolution, because the color of colored materials layer is abundanter, therefore, the color of this thermotropic display element is than horn of plenty; The second, described thermotropic display element and thermotropic display device need not charged particle, and cost is lower; The 3rd, even described thermic thermotropic display element under the situation of outage, also can make the colored materials layer keep certain color, still can realize colored the demonstration, help energy savings.Described thermotropic display element and thermotropic display device can be applied to fields such as advertisement, newspaper, books.
See also Fig. 6, second embodiment of the invention provides a kind of thermotropic display element 200, and this thermotropic display element 200 comprises a closure casing 202, and this closure casing 202 comprises a upper substrate 2022 and an infrabasal plate 2024; This closure casing 202 comprises a space 220, and this space 220 is between upper substrate 1022 and infrabasal plate 2024; One colored materials layer 210, this colored materials layer 210 is arranged in the space 220, and contacts with this infrabasal plate 2024; One first heating element 206 is arranged at upper substrate; One second heating element 108 is arranged at infrabasal plate 2024.This thermotropic display element 200 further comprises at least two first electrodes 214 and at least two second electrodes 216.These at least two first electrodes 214 are electrically connected with this first heating element 206 respectively, and these at least two second electrodes 216 are electrically connected with this second heating element 208 respectively.
The structure of the thermotropic display element 100 that the thermotropic display element 200 that present embodiment provided and first embodiment are provided is basic identical, its difference is, the position of described first heating element 206 and second heating element 208 and the set-up mode of first electrode 214 and second electrode 216.
Described first heating element 206 is arranged at the inside surface of upper substrate 2022, is positioned at the inside in space 220, directly contacts with colored materials layer 210.Described at least two first electrodes 214 are electrically connected with first heating element 206 respectively.In the present embodiment, the quantity of first electrode 214 is two, and these two first electrodes 214 lay respectively at the two ends of first heating element 206, and each first electrode 214 and first heating element 206 are in contact with one another.First electrode 214 comprises an extension 2142, and this extension 2142 extends to the outside of closure casing 202.The extension 2142 of this first electrode 214 makes this first electrode 214 be electrically connected with external circuit.
Described second heating element 208 is arranged at the inside surface of infrabasal plate 2024, is positioned at the inside in space 220, directly contacts with colored materials layer 210.Described at least two second electrodes 216 are electrically connected with second heating element 208 respectively.In the present embodiment, the quantity of second electrode 216 is two, lays respectively at the two ends of second heating element 208, and each second electrode 216 and second heating element 208 are in contact with one another.Second electrode 216 comprises an extension 2162, and this extension 2162 extends to the outside of closure casing 202.The extension 2162 of this second electrode 216 makes this second electrode 216 be electrically connected with external circuit.
The thermotropic display element 200 that present embodiment provided, because first heating element 206 and second heating element 208 lay respectively at the inside in space 220, can distinguish directly to 210 heating of colored materials layer, thermal losses is less, and firing rate is very fast, makes the display speed of thermotropic display element 200 very fast.
The present invention further provides a kind of thermotropic display device of using above-mentioned thermotropic display element.Described thermotropic display device comprises that a plurality of thermotropic display elements are arranged by determinant and forms a pel array; And one drive circuit and a plurality of contact conductor, the heating element that this driving circuit is controlled each thermotropic display element respectively by described a plurality of contact conductors works alone.Particularly, the embodiment of the invention is with shared one first battery lead plate of first heating element in a plurality of thermotropic display elements, shared one second battery lead plate of second heating element of a plurality of thermotropic display elements, and independently control each thermotropic display element work with the realization display effect by the addressing circuit that the row-column electrode on first battery lead plate and second battery lead plate forms.To be example below, thermochromatic display device of the present invention will be described in further detail with the thermochromatic display device of the thermotropic display element 100 of using first embodiment of the invention.
See also Fig. 7, the invention provides a kind of thermotropic display device 40 that uses above-mentioned thermotropic display element 100.This thermotropic display device comprise one first battery lead plate 42, one second battery lead plate 44 and be arranged at this first battery lead plate 42 and second battery lead plate 44 between a plurality of thermotropic display elements 100.Described first battery lead plate 42 and second battery lead plate 44 are oppositely arranged.
See also Fig. 8, described first battery lead plate 42 is a transparency carrier, and it comprises a first surface 420.Described first battery lead plate 42 comprises a plurality of first column electrodes 422 and a plurality of first row electrode 424, and these a plurality of first column electrodes 422 and a plurality of first row electrode 424 are arranged in a crossed manner in the first surface 420 of this first battery lead plate 42.Mutually insulated between these a plurality of first column electrodes 422 and a plurality of first row electrode 424.Be provided with at interval between described a plurality of first column electrode 422, be provided with at interval between described a plurality of first row electrodes 424.Form one first grid 426 between adjacent two first column electrodes 422 and adjacent two the first row electrodes 424.See also Fig. 9, described second battery lead plate 44 comprises a second surface 440.The structure of described second battery lead plate 44 is identical with the structure of first battery lead plate 42, and it comprises a plurality of second column electrodes 442 of the second surface 440 that is arranged on second battery lead plate 44, a plurality of secondary series electrode 444 and a plurality of second grid 446.
The first surface 420 of described first battery lead plate 42 and the second surface of second battery lead plate 44 440 are in the face of being provided with, and a plurality of first column electrodes 422 on the described first surface 420, a plurality of first row electrode 424 and a plurality of first grid 426 are corresponding one by one with a plurality of second column electrodes 442, a plurality of secondary series electrode 444 and a plurality of second grid, 446 difference on the second surface 440.Per two corresponding first grids 426 that are provided with and second grid 446 constitute a display unit.Each thermotropic display element 100 is arranged in the display unit, between first battery lead plate 42 and second battery lead plate 44.These a plurality of thermotropic display elements 100 are arranged and are formed a plurality of row and columns.100 pairs of each thermotropic display elements should thermotropic display device 40 a pixel.Please in the lump referring to Fig. 2, the upper substrate 1022 of each thermotropic display element 100 is arranged in first grid 426 of first battery lead plate 42, and is in contact with one another with the first surface 420 of this first battery lead plate 42.Because first heating element 106 is arranged at the surface of upper substrate 1022, first heating element 106 is arranged in first grid 426, and is electrically connected with first column electrode 422 and the first row electrode 424 respectively by two first electrodes 114.The infrabasal plate 1024 of this thermotropic display element 100 is positioned at second grid 446 with the 426 corresponding settings of this first grid, and is in contact with one another with second battery lead plate 44.Because second heating element 108 is arranged at the surface of infrabasal plate 1024, second heating element 108 is arranged in first grid 426, and is electrically connected with second column electrode 442 and secondary series electrode 444 respectively by two second electrodes 116.Two first electrodes 114 on the described upper substrate 1022 are electrically connected with one first column electrode 422 and one first row electrode 424 of forming this first grid 426 respectively.These two first electrodes 114 can be electrically connected with this first column electrode 422 and the first row electrode 424 by contact conductor respectively.That is, one first electrode 114 of the thermotropic display element 100 of each row is electrically connected with one first column electrode 422, and one first electrode 114 of the thermotropic display element 100 of each row is electrically connected with one first row electrode 424.Two second electrodes 116 on each described infrabasal plate 1024 are electrically connected with one second column electrode 442 and a secondary series electrode 444 of forming this second grid 446 respectively, promptly, one second electrode 116 of the thermotropic display element 100 of each row is electrically connected with one second column electrode 442, and one second electrode 116 of the thermotropic display element 100 of each row is electrically connected with a secondary series electrode 444.
Further, can further comprise at least one supporting construction (figure does not show) between described first battery lead plate 42 and second battery lead plate 44.This at least one supporting construction is used to support first battery lead plate 42 and second battery lead plate 44, first battery lead plate 42 and second battery lead plate 44 is provided with at interval, thereby makes thermotropic display element 100 between first battery lead plate 42 and second battery lead plate 44.This at least one supporting construction can prevent that first battery lead plate 42 or 44 pairs of thermotropic display elements of second battery lead plate from producing pressure, has protective effect to thermotropic display element 100.Particularly, this at least one supporting construction can be for being arranged on the frame between first battery lead plate 42 and second battery lead plate 44, this at least one supporting construction and first battery lead plate 42 and 44 encapsulation of second battery lead plate form an enclosed construction, and these a plurality of thermotropic display elements 100 are positioned at this enclosed construction.
This thermotropic display device is by the row-column electrode on first battery lead plate and second battery lead plate, and first heating element and second heating element are realized the display effect and the wiping effect of this thermotropic display device.Simultaneously, by controlling the conducting of different row-column electrodes, realize the demonstration of different pixels point, thereby show different patterns or font.By the colored materials layer of different colours is set, can realize the demonstration of a plurality of colors in different thermotropic display elements.
In addition, those skilled in the art also can do other variations in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (14)
1. thermotropic display element, it comprises:
One closure casing, this closure casing comprise a upper substrate and an infrabasal plate, and described upper substrate comprises a first surface and one and the first surface opposing second surface, and described infrabasal plate and upper substrate are oppositely arranged;
One first heating element, this first heating element is arranged at this upper substrate;
One second heating element, this second heating element is arranged at this infrabasal plate;
It is characterized in that, described upper substrate is translucent structure, this thermotropic display element further comprises a colored materials layer, and this colored materials layer is arranged in this closure casing and under the alternately heat effect of first heating element and second heating element and changes by phase transformation position between upper substrate and infrabasal plate.
2. thermotropic display element as claimed in claim 1 is characterized in that, at least one surface is a rough surface in described first surface and the second surface.
3. thermotropic display element as claimed in claim 1, it is characterized in that, described closure casing further comprises side plate, this side plate and this upper substrate, infrabasal plate encapsulation form described closure casing, this closure casing has a space that is surrounded by upper substrate, infrabasal plate and side plate, and described colored materials layer is arranged in this space.
4. thermotropic display element as claimed in claim 1 is characterized in that, the penetrability of described upper substrate is 40%～80%.
5. thermotropic display element as claimed in claim 1 is characterized in that, described upper substrate is frosted glass or the transparent polymer material with rough surface.
6. thermotropic display element as claimed in claim 5 is characterized in that, described transparent polymer material is polyphenyl dioctyl phthalate glycol ester, polyimide, polystyrene, polypropylene, tygon, polychloroprene or Polyvinylchloride.
7. thermotropic display element as claimed in claim 1 is characterized in that, described first heating element is a transparent layered structure, and this first heating element is arranged at the first surface or the second surface of described upper substrate.
8. thermotropic display element as claimed in claim 7 is characterized in that, described first heating element is indium tin oxide films or carbon nano-tube stratiform structure.
9. thermotropic display element as claimed in claim 1 is characterized in that, described second heating element is arranged at the inside surface or the outside surface of described infrabasal plate, and described second heating element is metal level, indium tin oxide films or carbon nano-tube stratiform structure.
10. thermotropic display element as claimed in claim 8 or 9 is characterized in that described carbon nano-tube stratiform structure comprises one deck carbon nano-tube film at least, and this carbon nano-tube film comprises that a plurality of carbon nano-tube interconnect by Van der Waals force.
11. thermotropic display element as claimed in claim 10, it is characterized in that, the same direction of the most of carbon nanotube-based present dynasty in the described carbon nano-tube film is extended, and each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend in most of carbon nano-tube of extending substantially in the same direction.
12. thermotropic display element as claimed in claim 10 is characterized in that, the unit area thermal capacitance of described carbon nano-tube stratiform structure is less than 2 * 10
-4Every square centimeter of Kelvin of joule.
13. thermotropic display element as claimed in claim 1 is characterized in that, the material of described colored materials layer is iodine or naphthalene.
14. a thermotropic display device, it comprises:
One first battery lead plate, this first battery lead plate comprise a plurality of first column electrodes and a plurality of first row electrode, and these a plurality of first column electrodes and a plurality of first row electrode crossing are provided with and form a plurality of first grids;
One second battery lead plate, this second battery lead plate comprises a plurality of second column electrodes and a plurality of secondary series electrode, these a plurality of second column electrodes and a plurality of secondary series electrode crossing are provided with and form a plurality of second grids, described second battery lead plate and first battery lead plate are oppositely arranged, first grid and second grid are corresponding one by one, and first grid of every pair of correspondence and second grid constitute a display unit;
A plurality of thermotropic display elements, each thermotropic display element correspondence respectively are arranged in each colour developing unit, and between first battery lead plate and second battery lead plate, this thermotropic display element is any described thermotropic display element in the claim 1 to 17;
First heating element of each thermotropic display element is electrically connected with one first column electrode and the one first row electrode of first battery lead plate respectively;
Second heating element of each thermotropic display element is electrically connected with one second column electrode and a secondary series electrode of second battery lead plate respectively.
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| CN2010102625502A CN101923227B (en) | 2010-08-25 | 2010-08-25 | Thermotropic display element and thermotropic display device |
| US12/913,977 US8432602B2 (en) | 2010-06-24 | 2010-10-28 | Chromatic element and chromatic display device using the same |
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| CN2010102625502A CN101923227B (en) | 2010-08-25 | 2010-08-25 | Thermotropic display element and thermotropic display device |
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