131results about How to "Avoid light pollution" patented technology

An optical light emitting device comprises a circuit substrate having a plurality of LED lamps arranged as an array; a plurality of optical lenses correspondingly installed to light extraction portions of the plurality of LED lamps, the optical lens having a platform that is equipped with an incident concave surface for containing the LED lamp, a light extracting convex surface disposed to a corresponding exterior end of the incident concave surface; and a reflector having a plurality of containing holes arranged as an array capable of corresponding to the LED lamps array of the circuit substrate, each containing hole provided for fitting the light extracting convex surface of the optical lens, expansion inclined planes with an upper-wide and lower-narrow shape disposed to a periphery of the containing hole, the platform of the optical lens leaning against a frame border of the containing hole.

A system for preventing light pollution includes one or more radar units that monitor for vehicles in a volume surrounding or containing one or more obstructions having one or more obstruction lights. A master radar detection processing unit receives sensed radar detection information from the one or more radar units with associated radar signal processing units and determines whether a vehicle is present within the monitored volume. A plurality of obstruction light controller units are interconnected in a network, such as a wireless network. Each obstruction light controller unit turns on an obstruction light when a vehicle enters the monitored volume or a failure condition exists, and turns off the obstruction light when the vehicle has vacated the monitored volume and no failure condition exists. The one or more radar units can transmit sensed radar detection information to a master radar detection processing unit via the network.

The present invention relates to a waterproof material, wherein film layers are set between non-woven fabric layers, an asphalt layer is set between the film layers, and a net reinforcement layer is set within the asphalt layer. The advantages of the present invention include: (1) film layers are formed by laminating it on the compositing surfaces of the upper and lower non-woven fabric layers, which overcomes the drawback of water leaking in the background art, prevents the leaking of asphalt into the non-woven fabric or out of the non-woven fabric during the compositing process, so that the environmental pollution during transportation and application is avoided; (2) a glass-fiber netlike reinforcement layer is set within the asphalt layer, so that not only the tensile strength and compressive strength of the asphalt layer, but also the tensile strength and tear strength of the roofing underlayment material are improved; (3) the thickness and number of film layers are set to ensure the temperature-resistance and puncturing-resistance of film layers.

The invention relates to environmental protection paint, in particular to nano shell powder ecological functional flatly painted coating. The coating is prepared from shell powder (calcined), ash-calcium, kaolin, heavy calcium carbonate, hydrated magnesium silicate, titanium dioxide, vinyl acetate, hydroxyethyl cellulose, polyving akohol, polydimethylsiloxane, a water reducer and a defoamer. The coating solves the problem that indoor ornament or decoration paint is not environment-friendly. The coating has the characteristics that the coating is antifungal, purifies the air, prevents mildew, adopts a spiral pore structure, is 3.0mm in press coating thickness and high in glossiness, does not has obvious color aberration, is resistant to shock, abrasion, water, high and low temperature weather and aging, and ensures that the service life of a product reaches more than 20 years.

A light emitting display device includes: a substrate; a first electrode disposed on the substrate in each pixel area; an insulating film disposed on the substrate, where a first opening, which exposes the first electrode, is defined in the insulating film; a blocking film disposed on a side surface of the insulating film, which defines the first opening; a light emitting layer disposed in the first opening and on the first electrode, where the light emitting layer is in contact with the blocking film; and a second electrode disposed on the light emitting layer.

The invention provides a feed and detection method of LED luminous energy and an illuminating system, and relates to the technology of an LED illuminating device and the detection technology of the LED illuminating device, and the photovoltaic energy-saving technology. The electric energy in the ageing process of an LED lamp is recycled, whole-process monitoring record of the ageing process of the LED lamp is achieved, and then the purpose of accuracy detection is achieved. According to the technical scheme, the luminous energy of a light source of the LED lamp is obtained through a photovoltaic module, and the luminous energy is converted into electric energy; electrical parameter information is obtained from the photovoltaic module through an ageing detection module, and the electric energy is conveyed to a storage battery and a load through an electric energy controller; temperature of a detection box where the LED lamp is located is detected, temperature parameters are obtained, temperature information and electrical parameter information are transmitted to a control analysis system and are analyzed and processed by the control analysis system, and data which can continuously record and monitor the ageing process of the LED lamp are generated. The control analysis system conducts summarizing, association, analyzing treatment and recording storage on the electrical parameter information and the temperature parameter information.

The invention relates to a solar-powered car which has an automatic adjusting function and can prevent light pollution and dazzling. The solar-powered car which has the automatic adjusting function and can prevent light pollution and dazzling comprises a car body and an electricity generation mechanism, wherein the electricity generation mechanism comprises a first photovoltaic panel, two drivingunits and two photovoltaic assemblies; the photovoltaic assemblies comprise supports and second photovoltaic panels; the car body is internally provided with a light weakening mechanism, and the lightweakening mechanism comprises a transverse rod, a sleeve ring, a lifting unit, a translation unit, a light filtering plate and two vertical plates. When the solar-powered car which has the automaticadjusting function and can prevent light pollution and dazzling runs in an urban area, through the driving units, the second photovoltaic panels are driven to rotate towards the first photovoltaic panel, so that light pollution caused by specular reflection is prevented, dazzling feelings of other car drivers are avoided, and then road traffic safety is guaranteed; moreover, through the lifting unit, the light filtering plate is driven to go down to block strong sunlight, and through the translation unit, the horizontal position of the light filtering plate is adjusted, so that a driver has agood sight line, safe driving is guaranteed, and then the practicability of the solar-powered car is improved.

The invention discloses a head-up display, comprising a housing, a projector, a coincidence lens, a plurality of dust covers and a moving module. The housing is provided with an opening. The dust covers are coupled with the housing. The projector is arranged in the housing to provide image light beams. When the dust covers seal the opening, the coincidence lens is arranged in the housing. When the dust covers do not seal the opening, the coincidence lens can be moved out of the housing through the opening and moved to a transmission path of the light beams. The moving module is arranged in the housing and is coupled with the dust covers, so that the dust covers can move relative to the housing.

The invention discloses a character-wheel-type meter reading method and a character-wheel-type direct-reading meter. With respect to a photoelectric direct-reading type meter, at an optical pulse emitting end, a coded optical pulse is transmitted in optical fibers; the coded optical pulse irradiates to a specific position on a character wheel, wherein the specific position is provided with a light reflection or transmission area corresponding to characters on the character wheel; at an optical pulse receiving end, the coded optical pulse from the light reflection or transmission area is received by optical fibers and decoded by a decoding module so as to finally obtain the corresponding characters of the character wheel; the optical fibers at the optical pulse emitting end and the opticalfibers at the optical pulse receiving end are arranged in pairs and are opposite in positions; and in accordance with the system of the character wheel, a corresponding number of pairs of the opticalfibers at the optical pulse emitting / receiving ends are arranged so as to meet a condition that the emitted coded optical pulse and the received coded optical pulse in each pair of optical fibers areconsistent. By means of the invention, the problems of susceptibility to optical pollution, large optical interference between adjacent meters, large electromagnetic interference, poor safety, low reliability, high reading error rate and the like of the traditional direct-reading type meter are solved.

The invention provides an assembly type wallboard component prefabricated through rib steel mesh plates for engraving. The assembly type wallboard component comprises ribs, an inner wallboard, inner wallboard concrete and the rib steel mesh plates for engraving. The ribs include assembly type wallboard component edge ribs and middle density ribs. The inner wallboard and the inner wallboard concrete are internally provided with steel meshes of the rib steel mesh plates for engraving. The rib steel mesh plates for engraving are composed of engraving meshes, engraving end meshes and supporting meshes. The circumference of the rib steel mesh plates for engraving is formed by the engraving meshes, the engraving end meshes support the engraving meshes to form the end cross sections of the rib steel mesh plates for engraving, the supporting meshes control the height of the internal space of the rib steel mesh plates for engraving, the engraving meshes and the engraving end meshes are made of steel mesh bodies, the supporting meshes are reinforcing mesh bodies, N rows of flat marks are arranged on reinforcing bars in the length direction of the reinforcing mesh bodies, and the length of the flat marks is larger than 4 millimeters. The assembly type wallboard component prefabricated through the rib steel mesh plates for engraving belongs to a building assembly type wall. The assembly type wallboard component produced through the procedure is strong in integrity, reasonable in structure, high in quality standard, controllable in working procedure and good in self heat preservation performance.

The invention discloses radiated-cooled glass and a preparation method thereof. The radiated-cooled glass comprises a glass substrate, at least one oxide layer and a coating layer which are disposed in sequence, wherein the oxide layer has a certain visible light transmittance and a high near-infrared reflectance, and the coating layer comprises a light-transmitting polymer material and inorganicparticles dispersed in the polymer material; the inorganic particles have a high emissivity in a wavelength band of 7 to 14 [mu]m. The radiant-cooled glass disclosed by the invention has good opticalproperties, and the transmittance of visible light in the sunlight can be adjusted between 40 percent and 90 percent, and the reflectance of the visible light is very low; compared with traditional coated glass, the radiated-cooled glass has greatly improved optical performance; the radiant-cooled glass disclosed by the invention also has excellent thermal properties, can realize passive cooling of buildings when applied to the buildings, and meets the requirements of energy saving and environmental protection.

The invention relates to a special flooring waterborne polyurethane sub-gloss varnish product and a preparation method and application thereof. Particularly, the varnish product comprises a first container and a second container; the first container comprises a component A which is prepared from, by weight, 40-70 parts of polyacrylate dispersoid, 0.01-5 parts of siloxane dispersing agent, 0.01-5 parts of organosilicone defoaming agent and 0.01-5 parts of non-organosilicone defoaming agent; the second container comprises a component B which is prepared from 10-35 parts by weight of isocyanate curing agent. The invention further discloses the preparation method and application of the varnish product. The varnish product is excellent in surface finishing effect and chemical resistance, other comprehensive properties are balanced, and the varnish product can well meet various indexes of requirements of the national standard.

An ecological plant curtain makes a reader breathe fresh air when freely reading, recording, communicating, acquiring information from the internet and the like in a reading room and an information sharing space, a quiet, peaceful and comfortable learning environment is obtained, and various kinds of discomforts and diseases caused by pollution of the reading room and the information sharing space are prevented. In order to achieve the purpose, according to the technical scheme, the ecological plant curtain is composed of spraying curtain boxes and ecological climbing plants. The ecological plant curtain is characterized in that the ecological plant curtain is planted in the reading room and the information sharing space of a library, the green climbing plants and bamboo are selected as the ecological plants, and a spraying planting technology is adopted.

The invention provides a wall for prefabricated wallboard component assembling. The wall is formed by transporting prefabricated wallboard components produced industrially to a construction site and assembling the wallboard components with in-situ casting columns and beams. The wall is composed of columns, beams, doors or windows, heat insulation materials and the prefabricated wallboard components. The columns and beams are of reinforced concrete structures or formed steel structures. The prefabricated wallboard components include reinforced concrete ribs, an inner wallboard, an outer wallboard and ribbed steel mesh hollow parts. The reinforced concrete ribs include the prefabricated wallboard side ribs and the prefabricated wallboard middle ribs. The inner sides of the inner wallboard and the outer wallboard are provided with the ribbed steel mesh hollow parts. The ribbed steel mesh hollow parts are composed of a hollow net, a hollow end net and a supporting net. The self-insulation material is formed by foaming cement paste poured into the ribbed steel mesh hollow parts. The prefabricated wallboard components are high in integrity, reasonable in structure, high in quality standard, controllable in working procedure and good in self-insulation.

The invention discloses a non-welded car frame. The non-welded car frame comprises a car platform assembly, a stand column assembly, an upper cross beam assembly and a first guide roller assembly, and further comprises a plurality of fixing members, wherein the stand column assembly is provided with a plurality of first assembling parts; and each of the car platform assembly, the upper cross beam assembly and the first guide roller assembly is provided with a second assembling part, and the plurality of fixing members are used for fixing the first assembling parts and the second assembling parts so as to assemble the car platform assembly, the upper cross beam assembly and the first guide roller assembly on the stand column assembly. The stand column assembly, the car platform assembly, the upper cross beam assembly and the first guide roller assembly are assembled through matching among the fixing members, the first assembling parts on the stand column assembly, and the second assembling parts on the car platform assembly, the upper cross beam assembly and the guide roller assembly, and no welding is used in the assembling process, thus the troubles in factory manufacture and layout caused by welding of multiple parts and large parts are avoided.

The invention discloses a bottom irradiating type high temperature and high pressure photochemical reaction kettle. The bottom irradiating type high temperature and high pressure photochemical reaction kettle is characterized by comprising a case, wherein the case comprises an upper partition plate, the upper partition plate is provided with a heating furnace, a reaction kettle is arranged in theheating furnace, a kettle body of the reaction kettle penetrates through the upper partition plate and extends out, a transparent window made of a sapphire sheet is arranged at the bottom of the kettle, a middle partition plate is fixed in the case, a light source is installed in the case, a lamp holder of the light source penetrates through the middle partition plate, extends upwards and perpendicularly irradiates on the sapphire sheet, a closed dark case for holding the lamp holder and shading for the lamp holder is formed in the case, and a heat dissipation device is arranged. The bottom irradiating type high temperature and high pressure photochemical reaction kettle has the advantages that the illumination intensity is strengthened and the light pollution of the light source on a labis avoided.

The invention discloses a cabinet door for a hydrogen peroxide low-temperature plasma sterilizer. The cabinet door comprises a door body (1), an observation window (2) and a shell (3); a lookout hole (A) is formed in the position on the shell (3), corresponding to the observation window; a round groove (D) is formed in the back surface of the shell (3), and a lug boss (E) is arranged inside the groove; an anti-dazzling screen (4) provided with two openings is mounted inside the round groove (D); and a shifting hole (B) is further formed in the position on the shell (3), corresponding to the anti-dazzling screen. The anti-dazzling screen (4) is rotated by penetrating through the lifting hole outside the cabinet door, and a first opening in the anti-dazzling screen (4) is rotated to the position of the lookout hole in the shell, so that a user can view a working condition inside a sterilization chamber of the equipment through the observation window. When the user stops observing, the anti-dazzling screen (4) is reversely rotated, and an anti-dazzling part below a second opening in the anti-dazzling screen is rotated to the position of the lookout hole, so that the observation window is entirely shielded, and light and heat inside the sterilization chamber can be prevented from being radiated through the observation window.

The invention provides a self-insulating wall composed of prefabricated assembled wall panels, which is composed of columns, beams, doors or windows, thermal insulation materials and prefabricated assembled wall panels; the columns and beams are reinforced concrete structures or Sectional steel structure; prefabricated wall panels include reinforced concrete ribs, interior wall panels, exterior wall panels and ribbed steel mesh; reinforced concrete ribs include side ribs of prefabricated wall panels and middle ribs of prefabricated wall panels; The reinforced concrete rib is a cavity rib, and the cavity rib is formed by a ribbed steel mesh cylinder, and the self-insulation material formed by cement slurry foaming is poured into the ribbed steel mesh cylinder; Steel mesh hollow body; self-insulation material formed by foaming cement slurry is poured in the ribbed steel mesh hollow. Strong integrity, reasonable structure, high quality standard, controlled process, good self-insulation.

The invention belongs to the field of solar cells, particularly relates to blue front plate glass for a photovoltaic module, and further discloses a blue photovoltaic module prepared from the blue front plate glass. According to the blue front plate glass disclosed by the invention, the high-refractive-index layers and the low-refractive-index layers which are alternately superposed are formed bydepositing materials with different refractive indexes, the required blue dielectric film block is formed by adjusting the thickness matching among the layers, and the blue front plate glass capable of being used for a photovoltaic module is formed by depositing the blue dielectric film block on the surface of the glass substrate. The blue front plate glass has high transmittance and good weatherresistance and water resistance in a sunlight waveband range; and the photovoltaic module has excellent color uniformity in an angle range with a reflection angle not greater than 60 degrees and has color saturation higher than 20 at a near-normal reflection angle, the appearance effect of the photovoltaic module can be effectively improved, the problem of single color of a traditional photovoltaic module is effectively improved, and the requirement of photovoltaic building integration for appearance color can be met.

The invention aims at providing a preparation method of plant cell water. The preparation method has the advantages that the preparation is performed at low temperature, the water source is pure and is free from pollution, the plant nutrient elements and trace elements are contained, the easiness in deterioration is avoided and the easiness in absorbing is realized. The preparation method comprises the following steps of cleaning: cleaning fruits and / or vegetables; juice extracting: extracting the cleaned fruits and / or vegetables, and filtering, so as to obtain primary extracting liquid; low-temperature separation: leading the primary extracting liquid into a freezing machine, and setting the temperature of the freezing machine to -1 to 10 DEG C; standing until freezing liquid formed by the standing and separating of the primary extracting liquid is completely solidified, wherein the freezing liquid contains a juice liquid layer and a cell liquid layer; collecting: collecting cell liquid ice solidified by the upper cell liquid layer from the freezing liquid; filling: filling the cell liquid obtained after the cell liquid ice is melted at room temperature; sterilizing: sending the filled cell liquid into superhigh-pressure cold sterilizing equipment to sterilize, so as to obtain a finished product of the plant cell water. The preparation method has the advantages that destroy to the nutrient components in the fruit and vegetable cell water is avoided, and the natural and pollution-free effects are realized.

The invention relates to a method for extinction electrophoresis of an aluminum alloy section. The method comprises the following steps: (a) soaking the aluminum alloy section into an acid solution, an alkaline solution and water in sequence to remove grease on the surface; (b) performing anodic oxidation on the aluminum alloy section without the grease to from an oxide film on the surface of the aluminum alloy section; (c) soaking the aluminum alloy section after the anodic oxidation into a solution containing nickel sulfate and stannous sulfate, and electrifying for coloring; (d) soaking the colored aluminum alloy section into electrophoretic paint, and electrifying for electrophoresis; and (e) heating the aluminum alloy section after electrophoresis at 170-220 DEG C for 10-50 minutes. The aluminum alloy section after the anodic oxidation is soaked into the solution containing nickel sulfate and stannous sulfate to perform electrified coloring, so that a black extinction film layer can be formed on the surface of the aluminum alloy section, thereby avoiding light pollution generated by formation of an aluminum alloy.

The invention discloses a high-reflectivity material surface defect thermal imaging detection system and a high-reflectivity material surface defect thermal imaging detection method. The high-reflectivity material surface defect thermal imaging detection system comprises a parameter detection module, a system control module, an infrared measuring imaging module, a focusing flag, a focusing flag making module, a motion control module, a signal processing module and a diagnosis module. The high-reflectivity material surface defect thermal imaging detection system can detect fine crack defects onthe surface of a high-reflectivity material, is high in detection speed, simple in implementation, intuitive in result and high in efficiency, avoids radiation and chemical corrosion, avoids light pollution, saves energy, has high accuracy degree, can strictly control exposure and meets the requirement of the production process of special parts.

The invention discloses a vehicle traveling speed and license plate recognition system and method based on TOF imaging. The system comprises a monitoring equipment mounting frame and a TOF camera, andan image processing computer arranged in a monitoring center. The monitoring equipment mounting frame comprises a column and a mounting bar fixedly connected at the top of the column and arranged perpendicularly to the column, and a TOF camera is mounted at the top of the mounting bar; The vehicle traveling speed method comprises the following steps: step A1, video acquisition and transmission; step A2, vehicle traveling speed identification; The license plate recognition method comprises the following steps: step B1, video acquisition and transmission; step B2, license plate recognition. Theinvention has the advantages of low cost, convenient installation and maintenance of the system, high recognition accuracy of vehicle traveling speed and high recognition accuracy of vehicle licenseplate, can effectively manage and control the road traffic, reduce traffic accidents, and avoid light pollution and safety hidden danger caused by visible light supplementation when vehicle speed measurement and vehicle license plate recognition are carried out by using visible light.

The invention relates to the field of monitoring equipment, in particular to a wirelessly connected desktop computer camera, comprising a camera main body, a base and a microphone, wherein a soft rubber cushion is arranged at the bottom of the base, a storage battery is arranged at the bottom of the base, a wireless connection transmitter is arranged in the base, an electric quantity indicator lamp and a charging interface are arranged on a basic surface of the base, a first titanium alloy hose and the microphone are arranged at the top of the base, the microphone and the base are fixedly connected by a second titanium alloy hose, the first titanium alloy hose and the base are fixedly connected by a first connecting block, the camera main body is arranged at the top of the first titanium alloy hose, the camera main body and the first titanium alloy hose are fixedly connected by a second connecting block, a microphone, an LED night vision fill light and a glass lens are arranged on thebasic surface of the camera main body, a lamp source switch is arranged on the back surface of the camera main body, the wirelessly connected desktop computer camera provided by the invention has a simple overall device structure, is convenient to operate, and has a certain promotion effect.

The invention discloses a water path sterilization device and an intelligent toilet lid with same, belonging to the technical field of sterilization. The water path sterilization device comprises a first lid body and a second lid body, wherein the first lid body and the second lid body are buckled in a sealed manner to form a cavity communicated with a water inlet tube and a water outlet tube; thecavity is internally provided with a photocatalyst filtering net for partitioning a water path into a water inlet side and a water outlet side; a photocatalyst light source radiating the cavity is arranged on the side wall of the first lid body and / or the second lid body; an ultraviolet radiation lamp tube is arranged on the outer wall of the water inlet tube and / or the water outlet tube; and thewater inlet tube or the water outlet tube matched with the ultraviolet radiation lamp tube is a transparent water tube. Due to unique structural design, the internal structure of the sterilization device is simplified, and due to modularized design, the sterilization device is compact, small and exquisite in structure; meanwhile, due to two-stage sterilization of ultraviolet light and the photocatalyst, the sterilization effect of a water body can be improved; and when the sterilization device is applied inside the intelligent toilet lid, the problem of sterilization of water washing of the intelligent toilet lid can be solved, and the intelligent toilet lid can be safe to use at ease.

The invention discloses a beam connection structure of a assembly type concrete frame. The beam connection structure comprises a left pre-embedded section, a connecting section and a right pre-embedded section; the left pre-embedded section, the connecting section and the right pre-embedded section are all box type section steel components; the left pre-embedded section and the right pre-embedded section are both embedded in a reinforced concrete frame beam previously and become a part of concrete beam sections through concrete pouring and hardening; and during construction, the concrete beam sections are connected through the connecting section of the beam connection structure, so that the structure becomes a whole. The connecting section is designed according to the needs that the concrete frame beam forms a plastic hinge, and the carrying capacity is adjusted by a section dimension, so that the connecting section is in an elastic working condition in normal use; and when an extraordinary event occurs, the connecting section yields first and develops plastic deformation reliably. According to the beam connection structure of the assembly type concrete frame, construction is simple, when the extraordinary event occurs, the beam connection structure forms the plastic hinge to protect the other parts of the component from being damaged; and after the extraordinary event, the connection section with severe deformation can be replaced, and an excellent structural performance is achieved.

Provided are an integrated system and method for automatically regulating luminance after an LED display screen gets out of control. The system comprises a set of LED display units, a control computer and a set of wireless communication instruments; the control computer sends control and configuration commands to all the LED display units in a periodic mode; the control computer is in real-time wireless communicated with the LED display units through the communication instruments; LED display screen safety luminance automatic regulation software modules are embedded into all the LED display units, and by monitoring the operation state of a signal automatic identification control system from the control computer, a safety luminance regulation mode or a normal work mode is started correspondingly. The LED display units analyze control signals, and when the control signals are normal, the LED display units are driven to work and receive various types of configuration and control; when the control signals are abnormal, the LED display units enter the self safety protection state, and actively regulate the self luminance and the work state, therefore, traffic accidents and light pollution caused by high luminance when the LED display screen gets out of control can be effectively avoided, and other relative problems are resolved.

The invention belongs to the field of solar cells, particularly relates to yellow front plate glass for a photovoltaic module, and further discloses a yellow photovoltaic module prepared from the yellow front plate glass. According to the yellow front plate glass disclosed by the invention, high-refractive-index layers and low-refractive-index layers which are alternately superposed are formed bydepositing materials with different refractive indexes, a required yellow dielectric film block is formed by adjusting the thickness matching among the layers, and the yellow front plate glass capableof being used for the photovoltaic module is formed by depositing the yellow dielectric film block on the surface of the glass substrate. The yellow front plate glass has high transmittance and goodweather resistance and water resistance in a sunlight waveband range; the yellow front plate glass has excellent color uniformity in an angle range with a reflection angle not greater than 60 degreesand has color saturation higher than 20 at a near-normal reflection angle, the appearance effect of the photovoltaic module can be effectively improved, the problem of single color of a traditional photovoltaic module is effectively improved, and the requirement of photovoltaic building integration for appearance color can be met.

The invention relates to a photovoltaic display assembly and a photovoltaic curtain wall. The photovoltaic display assembly comprises a display panel and a photovoltaic cell panel. The display panel is provided with a light-emitting surface and comprises a plurality of light-emitting devices which are arranged on the light-emitting surface at intervals. The photovoltaic cell panel is attached to the light-emitting surface and provided with a plurality of through holes, and the plurality of through holes and the light-emitting devices are arranged in a one-to-one correspondence mode. The photovoltaic cell panel absorbs sunlight and converts the sunlight into electric energy to supply power to the display panel, so that light energy is effectively utilized, and the power utilization cost canbe saved. As the photovoltaic cell panel can absorb the sunlight, the sunlight can be prevented from irradiating the glass panel of the display panel, and the problem of light pollution is effectively avoided. Besides, through holes in one-to-one correspondence with the light-emitting devices are formed in the photovoltaic cell panel, light emitted by the light-emitting devices can directly irradiate the outside through the through holes, and thus the permeability of the display screen can be improved.