1507 results about "Electrochromism" patented technology

The invention discloses an intelligent interactive electrochromic projection glass control method and system, and the method comprises the steps: determining an interaction intention of a user, and calling a corresponding target projection parameter; querying a target transmittance value corresponding to the updated target projection parameter according to a preset transmittance projection mapping table; the light transmittance of the electrochromic glass is controlled to reach the target light transmittance value, and actual display parameters of the projection picture are collected; when the deviation between the actual display parameter and the updated target projection parameter exceeds a preset range, generating an RGB compensation coefficient according to the current environment illumination intensity value and the target transmittance value; and sending the RGB compensation coefficient to the projection unit to adjust the RGB three-color light output intensity of the projection light source. According to the method and the device, the environment illumination, the user interaction requirement and the voice instruction are sensed in real time, the glass transmittance is adaptively adjusted, and the RGB light source output is dynamically compensated, so that the consistent display effect of the projection picture is improved, and the conference cooperation difficulty is reduced.

The invention relates to the technical field of electrochromism coating, in particular to an electrochromism device coating process and method, and the electrochromism device coating process comprises the following steps: step 1, substrate pretreatment: cleaning attachments on the surface of a flexible substrate through ultrasonic cleaning and plasma treatment; step 2, conducting layer deposition treatment: depositing an indium tin oxide (ITO) conducting layer on the substrate at the deposition temperature of 100-380 DEG C, the thickness of 200-350 nm and the vacuum degree of less than or equal to 10 <-5 > Pa; step 3, electrochromic layer deposition treatment: sequentially depositing a tungsten oxide (WO3) layer and a nickel oxide (NiO) layer through a magnetron sputtering process, and controlling the film thickness ratio of NiO to WO3 to enable the ratio of NiO / W to be 0.25-0.357; 4, annealing treatment is conducted, specifically, annealing is conducted for the first time at the temperature of 200-500 DEG C, and the annealing time is 200-300 seconds; and secondary annealing is conducted, specifically, annealing is conducted at the temperature of 400 DEG C, and the annealing time ranges from 200 seconds to 800 seconds. The effect of improving the yellow ground color of the electrochromic device is achieved.

The invention relates to an electrochromic window multi-scene control method, system and device based on indoor human body thermal comfort and a medium. The method comprises the steps that a perception data set is constructed; based on the sensing data set, performing multi-parameter coupling calculation of solar incidence azimuth deviation constraint and dynamic projection overlapping to obtain a direct radiation component, performing window space coupling analysis and double space compensation calculation to obtain a scattered radiation component, and performing fusion to obtain an individual thermal radiation influence value; determining a scene category based on the perception data set, and establishing a thermal radiation evaluation benchmark by adopting a mode matched with the scene category; and if the thermal radiation evaluation benchmark exceeds a preset threshold value, the required transmissivity of the window faces is obtained through a full-transmissivity radiation distribution method, the corresponding window faces are adjusted to the target transmission gradient according to the required transmissivity, and coupling control over the wind direction and / or power of the air conditioning system is selectively triggered. According to the invention, by constructing a multi-dimensional dynamic sensing system and an intelligent control framework, collaborative optimization of human body thermal comfort and building energy efficiency is realized.

The invention relates to the field of application of electrochromic glass, in particular to an environment response type self-powered electrochromic glass intelligent collaborative transparent enclosure structure which comprises an enclosure structure body, and the enclosure structure body is of a sandwich type structure with a hollow interlayer. A self-powered module, an electrochromic glass unit, an environment sensing module and an intelligent regulation and control module are arranged on the enclosure structure main body; in addition, the invention further discloses a dynamic regulation and control method which comprises the steps of collecting data in real time, calculating an energy state and a dynamic regulation and control strategy and the like. The high-efficiency laminated photovoltaic glass and the energy storage unit are integrated, a dynamic regulation and control algorithm is combined, environment response type self power supply is achieved, the light transmittance is adjusted in real time to meet the illumination requirement, the operation cost and the energy consumption are remarkably reduced, modular design is combined with the flexible circuit interconnection technology, and the flexible circuit interconnection technology is optimized. The whole system gets rid of the limitation of complex wiring when being applied to building external windows, curtain walls or daylighting roofs, the installation process is greatly simplified, and the convenience of later maintenance is improved.

An electrochromic device includes: two electrodes with an electrochromic material therebetween; switching elements, a source or a drain of each of which is coupled to one of the two electrodes; scanning lines coupled to gates of the switching elements; transmission lines coupled to the other one of the source and the drain of each switching element; and first switches capable of individually switching coupling between a first wiring and each transmission line. A first period and a second period are alternately provided. In the first period, reset potentials of the transmission lines are given at either a first timing before a signal to be transmitted to the gates is given to the scanning lines or a second timing after the signal is given to the scanning lines. In the second period, the signal potential is given to the transmission lines at the other timing of the first and second timings.

Various embodiments of systems and methods for remote monitoring and controlling of electrochromic glass are described. In some embodiments, a device monitoring and control system can receive messages via a communication hub from a plurality of remote installation sites for electrochromic glass units. The messages include telemetry data associated with the electrochromic glass units. The system can stream the telemetry data to a data analytics engine that can perform analytics functions on the telemetry data. The system provides results of the analytics functions to remote destinations via a data analytics interface. The system can also receive, via a control interface, control instructions from remote sources to control one or more of the electrochromic glass units. The system can transmit control messages to the installation sites to implement the control instructions. The system can also establish a connection for a requestor to an installation site using a site's specific connection protocol.

Embodiments described include adhesive bus bars for electrochromic or other optical state changing devices. The bus bars are configured to color match and / or provide minimal optical contrast with their surrounding environment in the optical device, provide better adhesion than ink based bus bars, as well as obviate the need to mitigate defects in underlaying layers.

A smart mobility vehicle includes a windshield including an electrochromic film having adjustable transparency based on power applied thereto, and a projector configured to project vehicle driving information onto the windshield, wherein the windshield comprises an internal display area and an external display area, the internal display area being configured to display an image toward an inside of the vehicle, the external display area being configured to display an image toward an outside of the vehicle.

The invention discloses an electrochromic medium composition and application thereof.The electrochromic medium composition comprises at least one anode electrochromic material and at least one cathode electrochromic material, and the cathode electrochromic material comprises viologen derivatives. The viologen derivative is fluorenyl viologen prepared by introducing fluorene into a viologen structure, the compound can show different coloring states under different voltages, the compound is matched with a ferrocene derivative, a red and blue mixed coloring state can be realized, and the color of the viologen derivative is improved. Or the compound, dimethyl dihydrophenazine and a ferrocene derivative are matched, so that a neutral gray coloring state can be realized, and the application value of the compound in the field of electrochromism is greatly expanded.

The embodiment of the invention provides a preparation method of a peep-proof display screen, the peep-proof display screen, equipment and a peep-proof method. In the embodiment of the invention, a light-transmitting material layer is formed on the light-emitting side of the display module; the display module comprises a substrate and a plurality of pixel units arranged on the substrate in an array mode. Patterning the light-transmitting material layer so as to form a plurality of light-transmitting island structures arranged in an array on the light-emitting side of the display module; the plurality of light-transmitting island structures are in one-to-one correspondence with the plurality of pixel units; the orthographic projection of the light-transmitting island structure on the substrate coincides with the orthographic projection of the corresponding pixel unit on the substrate. Filling gaps among the plurality of light-transmitting island structures arranged in the array with an electrochromic material to form an electrochromic layer; the plurality of light-transmitting island structures are located in the electrochromic layer; the electrochromic layer varies light transmittance in response to a voltage applied thereon. According to the technical scheme, good peep-proof performance can be achieved, the thickness of the peep-proof structure is small, and the influence on display brightness is small.

The invention provides an all-solid-state inorganic electrochromic glass preparation method and a monitoring regulation and control system, and relates to the technical field of glass preparation, and the method comprises the following steps: APCVD deposition of a film layer: plating a glass substrate with a first conductive film layer; plating a first insulating layer on the first conductive film layer; plating a main color-changing layer on the first insulating layer to obtain an electrochromic layer; pVD film layer deposition: plating a second insulating layer on the electrochromic layer; plating an electrochromic storage layer on the second insulating layer; and plating a second conductive layer on the electrochromic storage layer. By combining the APCVD and PVD processes, double reduction of equipment investment and material cost is realized, accurate control of the APCVD process and high deposition rate of the PVD process are combined, effective deposition rate is increased, uniformity and quality of a film layer are ensured, and two insulating layers are added on two sides of the electrochromic layer, so that electric leakage is effectively reduced, and the electrochromic effect is improved. The energy loss is reduced, and the aging process of the film layer is slowed down.

The invention provides a preparation method of a flexible integrated electrochromic device, which comprises the following steps: S1) mixing a crosslinking component A and a solvent to prepare a crosslinking component A premixing system; mixing the crosslinking component B with a solvent to prepare a crosslinking component B premixing system; the premixing system of the crosslinking component A and / or the premixing system of the crosslinking component B also comprises a non-crosslinking component; compounding a conductive layer on the surface of the flexible substrate layer to obtain a conductive film layer; s2) uniformly mixing the premixing system of the crosslinking component A and the premixing system of the crosslinking component B to form electrochromic slurry, and coating the electrochromic slurry on the surface of the conductive film layer; s3) combining the films, curing the electrochromic slurry, and forming a composite layer sequentially comprising a first flexible substrate surface, a first conductive layer, an integrated electrochromic layer, a second conductive layer and a second flexible substrate surface; and S4) performing laser slicing, electrode pasting and packaging to obtain the flexible integrated electrochromic device. According to the invention, the preparation of the flexible integrated electrochromic device can be completed very simply.

The invention discloses a vehicle film filtering degree adjusting system based on an electrochromic film, the electrochromic film is installed on a front windshield of a vehicle, and the system comprises a first acquisition module used for acquiring illumination intensity data in real time; the second acquisition module is used for acquiring a driver behavior image in real time; the control instruction module is used for setting an illumination intensity threshold value, judging whether the sunlight illumination intensity collected in real time exceeds the threshold value or not, further judging whether the filtering degree of the electrochromic film needs to be adjusted or not, and issuing a luminosity adjusting instruction; the processor is further used for analyzing driver behaviors according to the behavior recognition model, judging whether the filtering degree of the electrochromic film needs to be adjusted or not and issuing a luminosity adjusting instruction; and the filtering adjustment module is used for adjusting the filtering degree of the electrochromic film according to the luminosity adjustment instruction. The invention further discloses a vehicle film filtering degree adjusting method based on the electrochromic film. The driving safety is improved by adjusting the filtering degree of the vehicle film.

The invention discloses an intelligent color regulation and control method and system based on electrochromic glass, and relates to the technical field of electrochromism, and the method comprises the following steps: collecting spectral data of a current environment in real time; analyzing the solar energy conversion efficiency by using the spectral data, and calculating an electric energy value which can be used for regulation and control currently; analyzing the historical environment data and the historical regulation and control data of the user through a self-learning algorithm in combination with the usable electric energy value, and predicting the preference of the user; generating a glass color intelligent regulation and control scheme according to the user preference prediction result and the spectral data; based on a glass color intelligent regulation and control scheme, dynamic voltage is applied to each area through a distributed circuit, and color regulation and control are carried out. The current available electric energy value is calculated by embedding the multispectral sensor and combining the solar energy conversion efficiency, and meanwhile, the driving voltage of each region is dynamically calculated according to the user preference and the environmental spectral data, so that the problem of regulation and control deviation caused by material aging or uneven voltage distribution is solved.

The invention relates to a dual-band silver-based electrochromic device for dynamically regulating and controlling sun and mid-infrared radiation and application thereof.The device comprises two transparent conductive electrodes, silver-based gel electrolyte and a transparent packaging material, the two transparent conductive electrodes serve as a working electrode and a counter electrode respectively, the transparent conductive electrodes are indium tin oxide-quartz glass electrodes, and the silver-based gel electrolyte is arranged between the two transparent conductive electrodes. The working electrode is made of single-sided indium tin oxide-quartz glass, the counter electrode is made of double-sided indium tin oxide-quartz glass, the working electrode and the counter electrode are arranged in parallel and in a staggered manner and are bonded and fixed through a transparent packaging material, and then a silver-based gel electrolyte is injected between the two transparent conductive electrodes, so that the silver-based gel electrolyte is formed. And an electrode-electrolyte-electrode three-layer structure is formed. Compared with the prior art, the device has excellent sunlight and mid-infrared dual-band radiation modulation capability, is controllable in composition and structure and easy to expand, and has great application prospects in the aspect of all-season dynamic thermal management of transparent enclosure structures such as buildings and automobiles.

The invention relates to a display panel and a display device. The display panel comprises a substrate layer and a plurality of pixel units distributed on the substrate layer in an array mode, a light conversion assembly and an electrochromic layer are arranged between every two adjacent pixel units, and the light conversion assemblies are used for converting light energy into electric energy; the display panel further comprises a packaging layer, the electrochromic layer is located on the side, close to the substrate layer, of the packaging layer, the light conversion assemblies are located on the side, close to the packaging layer, of the substrate layer, and one light conversion assembly and one electrochromic layer are oppositely arranged. A light-emitting layer is arranged between every two adjacent photoelectric conversion assemblies. When the electrochromic layer is in the peep-proof mode, light rays obliquely emitted from the light-emitting layer act on the electrochromic layer and are reflected back to the photoelectric conversion assembly, so that the display panel has a narrow visual angle relative to a user. When the electrochromism layer is in a conventional display mode, external incident ambient light is emitted to the photoelectric conversion assembly through the electrochromism layer.

The invention relates to a multiband electrochromic composite film and a preparation method and application thereof, and belongs to the technical field of optical devices and preparation thereof. In order to solve the technical problem that in the prior art, the optical performance and the like of an electrochromic film in visible / near-infrared / mid-infrared areas need to be improved, the multiband electrochromic composite film has the optical modulation amplitude of 70%-78% under the light wavelength of 700 nm; and / or, the optical modulation amplitude is 65%-72% under the condition that the optical wavelength is 1200 nm; and / or in the bright hot mode, the light transmittance is 75%-82% under the light wavelength of 550 nm, and the light transmittance is 70%-75% under the light wavelength of 1200 nm; and / or in the bright cold mode, the light transmittance is 65%-72% under the light wavelength of 550 nm, and the light transmittance is 28%-35% under the light wavelength of 1200 nm; and / or in the dark cold mode, the light transmittance is 23%-28% under the light wavelength of 550 nm, and the light transmittance is 0.8%-2% under the light wavelength of 1200 nm. The method can be applied to intelligent window and spacecraft thermal management. The invention further provides a preparation method of the multiband electrochromic composite film.

The invention provides an electrochromic film, an electrochromic device and a preparation method of the electrochromic film, and relates to the technical field of electrochromic materials.The preparation method of the electrochromic film comprises the steps that a conjugated polymer is dissolved in a good solvent, and an electrochromic medium is obtained; preparing the electrochromic medium into an electrochromic film by adopting a spin coating method or a blade coating method; the electrochromic film is placed in a dopant solution to be doped, and the final electrochromic film is obtained. The invention provides a novel color changing mode of the polythiophene-based electrochromic film, and can improve the problem of poor bistable performance of the existing polythiophene-based electrochromic film.

The invention discloses a heat-preservation and heat-insulation composite window and a ventilation method. The heat-preservation and heat-insulation composite window comprises a window frame; the window frame is provided with a window frame top cavity and a window frame bottom cavity. A glass assembly; the glass assembly comprises electrochromic glass, first glass and second glass which are sequentially assembled in the notch of the window frame at intervals in the first direction; a first cavity is formed between the electrochromic glass and the first glass, and a second cavity is formed between the first glass and the second glass; a top opening and a bottom opening are formed between the electrochromic glass and the first glass; the window frame top cavity is provided with a first opening, and the window frame bottom cavity is provided with a second opening. The first opening, the top opening, the second opening and the bottom opening are communicated in sequence; a fan; the fan is arranged in the bottom cavity of the window frame. According to the scheme, the draught fan is arranged, heat absorbed in the first cavity is discharged out of a room so as to take away heat of the electrochromic glass, meanwhile, the second cavity is arranged to be a sealed cavity, the effects of heat preservation and heat conduction restraining are achieved, and the heat insulation effect is enhanced.

The invention relates to the technical field of electrochromism devices, and provides an electrochromism device, an electrochromism device and an electrochromism product, and the electrochromism device comprises a bonding assembly, a bus bar, and a first conductive substrate layer, an electrochromism layer and a second conductive substrate layer which are stacked; the bus bar is arranged on the peripheral edge of at least one of the first conductive substrate layer and the second conductive substrate layer; the bonding assembly is arranged on the peripheral edge of at least one of the first conductive substrate layer and the second conductive substrate layer and at least partially covers the bus bar; the bonding assembly comprises at least two sub-bonding pieces, and the at least two sub-bonding pieces are arranged on the peripheral edge of at least one of the first conductive substrate layer and the second conductive substrate layer in the first direction; the first direction is perpendicular to the stacking direction of the first conductive substrate layer, the electrochromic layer and the second conductive substrate layer. And the width of each sub-bonding piece is set in a reasonable range convenient to attach, so that the bonding difficulty when the bonding assembly is arranged is effectively reduced.

The invention relates to the technical field of electrochromic materials, in particular to a long-life electrochromic intelligent window and a preparation method thereof. Comprising a conductive substrate and an electrochromic device, the electrochromic device is arranged above the conductive substrate and comprises a transparent conductive film, an anode electrochromic film, a cathode electrochromic film and an electrolyte layer, and a plurality of layers of visible near-infrared anti-reflection infrared high-emission multilayer films are arranged above the electrochromic device. According to the structure, the optical regulation and control amplitude of the electrochromic device can be increased, visible infrared rays, near infrared rays and middle and far infrared rays are effectively blocked, the temperature of the colored electrochromic device is reduced, and the service life of the electrochromic intelligent window is prolonged.

The invention belongs to the technical field of device detection, and provides a defect identification method and system for an electrochromic device and a computer readable storage medium, and the method comprises the steps: firstly determining at least one of the charging voltage and the discharging voltage of the electrochromic device and at least one of the charging duration and the discharging duration of the electrochromic device; then, the electrochromic device is charged within the charging duration by adopting the charging voltage, and the electrochromic device can be discharged within the discharging duration by adopting the discharging voltage; and finally, detecting whether the electrochromic device has a predetermined defect in the charging treatment process or after the charging treatment or the discharging treatment process or after the discharging treatment is completed, so that the defect detection of the device is realized in a short time, and the device is prevented from being put into the market for use. And the problems that the aesthetic degree is reduced, the service life is short or the reliability is poor and the like caused by the defect in the use process of the electrochromic device are avoided.

The invention relates to the field of solar cells and electrochromism, in particular to electrochromic glass integrated with a semitransparent organic solar cell and a preparation method of the electrochromic glass. The electrochromism glass comprises an electrochromism layer and an organic solar cell layer stacked on the electrochromism layer, and the organic solar cell layer supplies power to the electrochromism layer; the electrochromic glass is further provided with a control circuit, and the control circuit can change the electrode connection mode of the cathode and the anode of the organic solar cell layer and the electrochromic layer so as to regulate and control the current direction in the electrochromic layer to achieve coloring or color fading. The electrochromic glass can realize self-energization, can regulate and control transparency according to illumination intensity, and has good photoelectric conversion performance and heat insulation performance.

The invention provides an electrochromic material, a preparation method thereof and a low-emissivity glass assembly. The electrochromic material comprises an electrochromic glass base material and an electrochromic film layer which are arranged in a laminated mode. The film layer structure of the electrochromic film layer comprises a first transparent conductive layer, a cathode electrochromic layer, an ion conduction layer, an anode electrochromic layer, a dielectric layer and a second transparent conductive layer which are sequentially laminated in the direction from the electrochromic glass substrate to the outside; and the material of the ion conduction layer comprises NiWOx or WOx. By optimizing the material of the thin film in the electrochromic material, the optical modulation performance of the electrochromic material is improved, the modulation amplitude is further increased, and the coloring time is shortened; and meanwhile, the radiance of the glass assembly is further reduced.

The invention belongs to the technical field of optical glass. The invention relates to an electrochromic glass device, in particular to a preparation method of the electrochromic glass device. The preparation method comprises the following specific preparation steps: cleaning the surface of a glass substrate, and depositing an indium tin oxide transparent conductive layer on the surface of the glass substrate by adopting magnetron sputtering; the preparation method comprises the following steps: by taking nano spherical silicon dioxide as a template, dispersing the nano spherical silicon dioxide in an ethanol solution, then adding a sodium tungstate solution, then adjusting the pH value to 2-3, carrying out a stirring reaction, and then cleaning with a sodium hydroxide solution to remove the template so as to obtain a hollow spherical precursor dispersion liquid; coating the hollow spherical precursor dispersion liquid on the surface of the transparent conductive layer in a spin coating mode, drying and annealing; preparing a liquid electrolyte: taking propylene carbonate as a solvent, and taking lithium perchlorate as an electrolyte lithium salt; niO is deposited on the surface of the WO3 electrochromic layer to serve as a counter electrode through magnetron sputtering; epoxy resin is adopted to package the edge, after liquid electrolyte is injected, internal residual bubbles are removed through hot pressing, and the product is obtained.

The invention discloses a pupil adaptive red light regulation and control method and system based on EC film and light source collaboration, and the method comprises the steps: obtaining a visible light image of the eyes of a user through an image collection module, and extracting a real-time pupil state parameter through an image processing module; meanwhile, the ambient light sensing module obtains ambient light intensity data. The cooperative control unit receives the parameters and generates a luminous flux control instruction set containing a first control instruction and a second control instruction based on a safety evaluation model. The first control instruction drives the electrochromic film assembly to change the light transmittance of the red light, and the second control instruction adjusts the luminous intensity of the red light source. Through cooperative control of optical attenuation of the electrochromic film and luminous intensity of the light source, the luminous flux entering the retina can be accurately regulated and controlled in real time according to dynamic changes of pupils, the problem of potential retina light damage risk caused by using a light source with fixed intensity is effectively solved, and the safety of red light irradiation application is remarkably improved.

The invention provides a high-performance electrochromic compound capable of realizing switching between a blue system and a transparent state by adjusting the proportion of a polymer receptor and a preparation method of the high-performance electrochromic compound. The electrochromic film prepared on the basis of the compound shows a blue system in a neutral state, and the color is switched to a transparent state along with the increase of external voltage. The optical contrast of the electrochromic compound in the wavelength range of 642 nm is 52.65%, the coloring time is 0.65 s, and the fading time is 0.32 s. The optical contrast ratio of the electrochromic film can keep 95.29% of the initial contrast ratio after 1000 cycles under the step voltage of 0V and 1.0 V. The electrochromic film is a solution-processable electrochromic material which has excellent performance and can be switched between blue and transparent colors.

The invention relates to a gel electrolyte, a preparation method thereof and an electrochromic device. The gel electrolyte comprises an electrolyte salt, a polymer matrix and a solvent, the polymer matrix comprises polymethyl methacrylate, the solvent is acetamide, and the molar ratio of the electrolyte salt to the solvent is 1: (4-8). A specific type of solvent and a specific type of polymer matrix interact with the electrolyte salt, and the ratio of the electrolyte salt to acetamide is controlled, so that a stable eutectic phase and a gel network structure can be formed, a channel is provided for ion transmission, and the ionic conductivity of the gel electrolyte is effectively improved; and when the gel electrolyte with the gel network structure is used for the electrochromic device, relatively high optical contrast and relatively high response speed can be obtained, and the electrochromic device can be rapidly discolored under low voltage.

The invention discloses an electrochromic intelligent window with a precise mode regulation and control function and a preparation method and application of the electrochromic intelligent window, and belongs to the technical field of intelligent buildings. In order to solve the problems that an existing electrochromic intelligent window is insufficient in energy-saving effect, poor in warm mode regulation and control performance and the like, the electrochromic intelligent window is made of a lithium / viologen-based electrolyte and tungsten oxide (WO3) bi-component electrochromic material, zoning regulation of visible light (380-780 nm) and near-infrared light (780-2500 nm) is independently achieved through voltage regulation and control, and the three modes of brightness, warm and darkness are achieved. In a warm mode, the visible light transmittance (TVIS < = 10%) is extremely low, the near-infrared light transmittance modulation range (delta TNIR < = 10%) is small, and excellent privacy protection and heat preservation performance is provided; and in the dark mode, visible light (TVIS < = 5%) is synchronously reduced, near-infrared light (DeltaTNIR > = 30%) is significantly modulated, and the energy-saving effect is significantly improved. Besides, high-emissivity and low-emissivity materials are designed on the outer layer of the device, and long-wave infrared light (2.5-25 microns) radiation is regulated and controlled in combination with mechanical overturning, so that the energy efficiency performance of the intelligent window in cooling in summer and heat preservation in winter is further enhanced.

According to one embodiment, a tungsten oxide material containing potassium is provided. The tungsten oxide material has a shape of particles including a central section and a peripheral section adjacent to the central section, and having an average particle size of 100 nm or less. A periodicity of a crystal varies between the central section and the peripheral section. In addition, a tungsten oxide powder mass for an electrochromic device including 80% by mass to 100% by mass of the tungsten oxide material is provided. Moreover, a slurry for producing an electrochromic device containing the above tungsten oxide material is provided.