50results about How to "Focus adjustment" patented technology

The invention discloses an information processing method and electronic equipment. The method is used in the electronic equipment which comprises an image collecting device, a driving device and a touching displaying unit. The image collecting device can movably rotate. The driving device is connected with the image collecting device. The method comprises the steps that when the image collecting device is at a first photographing position, first touching operation is detected and obtained on the touching displaying unit; whether the first touching operation is position adjusting operation for adjusting the photographing position of the image collecting device is judged; when the first touching operation is the position adjusting operation, the first touching operation is subjected to responding, and a first position adjusting instruction is generated; and the first position adjusting instruction is carried out through the driving device, changing of the current photographing position of the image collecting device is controlled, and the current photographing position of the image collecting device can be adjusted.

The invention discloses a camera control method, a device and a camera. The camera control method comprises the following steps of: firstly, determining pixel point coordinates of a target object in a scene image and pixel point coordinates of the target object in a depth image in each detection period; secondly, obtaining a distance between the target object and the camera based on the pixel point coordinates of the target object in the depth image; and lastly, adjusting a focal distance of the camera by utilizing a first distance obtained in a first detection period and a second distance obtained in a second detection period. The camera control method is applied to the camera, and an image sensor used for generating the scene image and a depth sensor used for generating a depth image of the corresponding scene are arranged in the camera. Through the method, the distance between the target object and the camera in each detection period can be obtained, the focal distance of the camera is adjusted through the distance, an algorithm is simple and the accuracy of zooming is improved.

The invention relates to remote-control variable-focal length glasses and belongs to the technical field of applied optics. The problem to be solved by the invention is to change glasses constantly with the change in eyesight for the nearsighted and farsighted. In the glasses, lenses are liquid variable-focal length lenses (1), a micro battery, a DC / DC chip and a control circuit module are integrated in a glass frame (2), an infrared signal receiving device is integrated in a nose frame (3), the glass frame (2), the nose frame (3) and the lenses (1) form a conducting loop, a remote controller ff(4) serves as an infrared signal transmitter, and the voltage applied on the liquid variable-focal length lenses (1) is adjusted to change the focal length of the glasses. The glasses have the advantages of continuous focal length change, durability, simple structure and diversifiable appearance design.

The invention discloses a spotlight type multifunctional solar cooking device. The device comprises a spotlight reflecting mirror, a barbecue vacuum tube and a photovoltaic cell system, wherein the spotlight reflecting mirror is fixed on a reflecting mirror support, the reflecting mirror support is capable of being adjusted at the pitching and horizontal positions through a double-shaft adjustable tracking system, the double-shaft adjustable tracking system is fixed on a tracking base disk, the barbecue vacuum tube is fixed at the focusing position of the spotlight reflecting mirror through a barbecue vacuum tube support, the photovoltaic cell system is installed on photovoltaic cell panel supports which are located on two sides of the spotlight reflecting mirror, the photovoltaic cell panel supports are fixed on the reflecting mirror support, the photovoltaic cell system is used for supplying power for the double-shaft adjustable tracking system, and the spotlight reflecting mirror is a parabolic spotlight reflecting mirror or a compound parabolic concentrator (CPC) composite spotlight reflecting mirror. The spotlight type multifunctional solar cooking device has the advantages that high concentration spotlight is achieved, temperature rising is rapid and efficiency is high, required time for cooking food can be reduced, and multistage differentiation food processing is achieved.

The invention discloses a gauge remote digital image acquisition device which comprises a camera and a reflecting mirror. The camera is located out of a digital reading area of a gauge counter, and the reflecting mirror reflects images from the gauge counter to the camera. The gauge remote digital image acquisition device uses the reflecting mirror to reflect the images from the gauge counter to the camera, enables a light path between the gauge counter and the camera to be lengthened, accordingly still can acquire digital images of the gauge counter even if the camera deviates from the digital reading area, prevents manual meter reading from being shielded due to existing of the camera, and furthermore can accurately and clearly obtain images due to the facts that the light path is lengthened in a limited size, and accordingly the wide angle and the focal distance of the camera can both be effectively adjusted. The gauge remote digital image acquisition device is simple and reliable in structure, has miniaturization and modularization design, and can be widely used in a remote automatic meter reading system and other systems which need to obtain the images remotely.

The invention discloses an adjustable LED street lamp light source which comprises a packaging substrate, a chipset mounted on the packaging substrate, a dimming device comprising a threaded sleeve and a rotary drum which are matched, a lens group comprising a concave lens and a convex lens, and a fluorescent tube, wherein the concave lens is arranged on the threaded sleeve, the convex lens is arranged at the front end of the rotary drum, and the fluorescent tube is arranged between the chipset and the lens and filled with a liquid fluorescent material. The invention solves the technical problem and provides the LED street lamp light source capable of adjusting the light-focusing degree. According to the adjustable LED street lamp light source disclosed by the invention, the lens group matched with and controlled by the dimming device is adopted, so that focal length match among various lenses of the lens group is achieved, further, light type of the light source can be adjusted and controlled, and the controllability of the LED street lamp light source is improved effectively.

The invention discloses a focal length regulating mechanism and a photographic apparatus having the same. The focal length regulating mechanism of the invention is arranged in the photographic apparatus and regulates the focal length of a camera lens set of the photographic apparatus. The focal length regulating mechanism comprises a focal length regulating knob which is combined with a shell of the photographic apparatus and provided with a contact part, and a pressure sensing module which is arranged at the position corresponding to the focal length regulating knob in the photographic apparatus, is contacted with the contact part and is electrically coupled with the camera lens set. When the focal length regulating knob is pressed, the pressure sensing module can generate different signal values according to the pressing quantity so as to determine the focal length of the camera lens set according to the different signal values. Besides, the invention also provides a photographic apparatus having the focal length regulating mechanism.

The invention provides an automatic zooming method for a laser cutting machine. The automatic zooming method includes steps that (1), a laser device emits laser beams, and the laser beams enter a laser cutting head, are reflected by a first curvature-variable reflection unit and a second curvature-variable reflection unit respectively and then reach the surface of a workpiece under a focusing effect of a lens group; and (2), pressure of cylinders in the first curvature-variable reflection unit and the second curvature-variable reflection unit is regulated, so that deformation curvatures of two reflectors are changed, and the focal length of the laser beams is automatically adjusted. The automatic zooming method has the advantages that automatic zooming without machine halt can be realized, and a foundation is laid for automatic production; materials with uneven thicknesses can be cut by the aid of automatic zooming, and a machining range is expanded; additional cost and errors caused by manual lens changing are eliminated; and the focal length can be adjusted on the premise that sizes of light spots are unchanged owing to different combinations of the curvatures of the two curvature-variable reflectors. The invention further provides an automatic zooming device for the laser cutting machine.

The invention discloses a mode control cascading-type liquid crystal micro lens array, relates to a liquid crystal micro lens array, and particularly relates to the technical field of mode control cascading-type liquid crystal micro lens arrays. The mode control cascading-type liquid crystal micro lens array comprises an upper substrate, a lower substrate and an internal packaging liquid crystal layer wherein the upper substrate and the lower substrate are arranged in parallel, the upper substrate includes upper substrate glass, a grounding electrode layer and an upper substrate alignment layer, the upper substrate glass, the grounding electrode layer and the upper substrate alignment layer are arranged in sequence, the lower substrate includes lower substrate glass, a contact electrode layer, a high surface resistance layer, a polymer solid lens and light an alignment layer, a gasket is arranged between the upper substrate alignment layer and the contact electrode layer in a distributed mode, and the internal packaging liquid crystal layer is formed by the upper substrate alignment layer, contact electrode layer and a gasket. According to the mode control cascading-type liquid crystal micro lens array, the purposes of being adjustable in focal distance, low in driving voltage and fast in response speed and time are achieved.

The invention discloses a rapid automatic focusing device, which comprises an aperture stepping motor, a focal length stepping motor, a motor driving module, a graphic processing unit, a positioning unit, a communication device, an image recognition unit, a power supply module, a display module and a data processing unit, wherein the aperture stepping motor and the focal length stepping motor arerespectively connected with the motor driving module; and the motor driver, the graphic processing unit, the positioning unit, the communication device, the image recognition unit and the power supplymodule are respectively connected with the data processing unit. According to the rapid automatic focusing device, dynamic setting of aperture values and focal length values in various scenes can berealized, and a good imaging effect is ensured.

The invention provides a lens focusing mechanism comprising an elastic lens surface, a liquid storage chamber, a connecting pipe and a permeable membrane, wherein an accommodating chamber is defined in the elastic lens surface, and at least two liquids which are not mutually dissolved and have different refractive indexes are in the accommodating chamber; the liquid storage chamber is disposed onthe outer side of the elastic lens surface and communicated with the accommodating chamber; one end of the connecting pipe is communicated with the liquid storage chamber, and the other end of the connecting pipe is communicated with the accommodating chamber; and the permeable membrane is arranged between the connecting pipe and the accommodating chamber. According to the lens focusing mechanism,by utilizing the structure of combining the elastic lens surface, the liquid storage chamber, the connecting pipe and the permeable membrane, flexible focusing can be achieved, and the lens focusingmechanism has the advantages of having a wide focusing range, being convenient to use and facilitating processing and production.

The invention relates to a rust removal device for an automobile mold. The rust removal device comprises an anti-rust device, a laser rust removal device and a dust removal device, wherein a compressor is arranged inside the anti-rust device, the compressor is connected with a gas storage tank, the gas storage tank is connected with an oil storage tank, and a spraying pipe is arranged below the oil storage tank; the spraying pipe is connected with a spraying head, and a galvanometer controller, a laser refrigerator and a rust removal laser are arranged inside the laser rust removal device; therust removal laser is composed of a light source and a beam expander, the laser refrigerator and the beam expander are both connected with an optical fiber pipe, the tail part of the optical fiber pipe is jointly connected with a rust removal laser head, and a focusing lens, a light splitting device and a scanning galvanometer are sequentially arranged inside the rust removal laser head; the scanning galvanometer is electrically connected with the galvanometer controller and the beam expander, a controller is arranged on the right side of the laser rust removal device, a dust remover is arranged inside the dust removal device, a dust suction pipe is connected below the dust remover, and the dust suction pipe is connected with the dust suction head. The device has the advantages that the structure is simple, the rust removal is convenient, and the application range is wide.

The invention discloses a lens focal length adjustable VR camera. The camera comprises a casing and a lens barrel, the bottom inner wall of the casing is provided with a motor, the motor is positioned at one side of the casing, an output shaft of the motor is connected with a screw, the screw is provided with third threads, the side, far from the inner wall of the casing, of the motor is provided with a sliding seat, the four corners of the bottom of the sliding seat are provided with first sliding columns respectively, the first sliding columns are in sliding connection with a chute, the chute is placed in the bottom inner wall of the casing, the side, close to the motor, of the sliding seat is provided with a fourth circular fixing hole, the inner wall of the fourth circular fixing hole is provided with fourth threads, the fourth threads cooperate with the third threads, the top of the sliding seat is provided with two support columns, the support columns are positioned in the two sides of the sliding seat respectively, and an image surface is arranged over the sliding seat. The VR camera is simple in structure, lower in cost, economical and practical, and the focal length of a lens in the VR camera is convenient to adjust so that the VR camera has a good shooting effect.

The invention discloses a universal position adjusting support for chip photographing. The universal position adjusting support comprises an adjusting support whole base, a whole base spherical hinge, a connecting rod, a sliding rod, an object table rotating base, a rotating base spherical hinge and an object table. The adjusting support whole base is composed of two half base bodies, and adjusting nuts are screwed in the adjusting support whole base to clamp the whole base spherical hinge; the upper end of the whole base spherical hinge is fixedly connected with the connecting rod, and the sliding rod is fixedly connected with the object table rotating base and can vertically slide in the connecting rod; the object table rotating base is composed of two half base bodies, and adjusting nuts are screwed in the object table rotating base to clamp the rotating base spherical hinge; the rotating base spherical hinge can rotate in the rotating base, and the angle of the object table can be adjusted and fixed by adjusting the angle of the rotating base spherical hinge and the angle of the whole base spherical hinge; and a magnetic piece is attached to the object table and attracts metal chips. According to the invention, the universal position of the object table can be achieved, and fixed photographing of various angles of the chips can be effectively achieved.

The invention discloses laser vibration measurement equipment and an adjusting method thereof. The equipment comprises a first laser device, a second laser device, a third laser device and a focusing device. The focusing device comprises a plurality of lenses. Light emitted by the third laser device is transmitted along optical axes of the multiple lenses. A first light path changing device is arranged on the light emitting light path of the first laser device. A second light path changing device is arranged on the light emitting light path of the second laser device. Light emitted by the first light path changing device and the second light path changing device is parallel to light emitted by the third laser device. The focusing device is used for performing focusing on parallel light from the first and second light path changing devices and the third laser device. The distance between the light emitting light path of the third laser device and each light emitting light path in the first and second light path changing devices is a first distance. The minimum distance between the light emitting light path of the third laser and the light emitting positions of the first laser device and the second laser device is a second distance. The first distance is smaller than the second distance.

The invention provides a lens group and near-to-eye display equipment, and relates to the technical field of optics; and the lens group comprises a focusing convergent lens assembly, a first optical element and a second optical element which are sequentially arranged in a light outgoing direction. The first optical element is used for enabling an incident light beam to be partially transmitted andpartially reflected, a reflected light beam, reflected by the first optical element, of the convergent light beam emitted from the focus-adjustable convergent lens assembly is emitted towards a second optical element, and after being reflected by the second optical element, the reflected light beam is imaged in a target area through the first optical element. When a myopia or hyperopia user findsthat an image is not clear when watching a picture in a target area through the lens group, the focal length of the whole lens group can be adjusted by adjusting the focal length of the focus-adjustable converging lens assembly, so that the watching requirement of the myopia or hyperopia user when using the lens group is met, and the use experience of the user is improved.

The invention provides a lens and a manufacturing method there as well as a pair of glasses and an optical system. The lens comprises a fresnel liquid crystal lens and a geometric lens. According to the lens provided by the invention, the fresnel liquid crystal lens can electrically control and adjust the focal length of the lens; furthermore, the fresnel liquid crystal lens is also combined withthe geometric lens for use, the focal length and wavelength of the fresnel liquid crystal lens are inversely proportional, and the focal length of the geometric lens is proportional to the wavelengththe geometric lens, so that the problem of chromatic aberration of the common optical component can be effectively reduced by the combination of the fresnel liquid crystal lens and the geometric lens.

The invention provides a camera module and electronic equipment. The camera module comprises a lens barrel assembly, a reflecting assembly and a first driving assembly. The lens cone assembly comprises a first lens cone and a second lens cone which are in sliding connection. The reflecting assembly comprises a first reflecting mirror and a second reflecting mirror, the first reflecting mirror is arranged in the first lens cone, the second reflecting mirror is arranged in the second lens cone, the first reflecting mirror and the second reflecting mirror are oppositely arranged in the optical axis direction, and the first reflecting mirror and the second reflecting mirror are used for reflecting light on the object side to the image side. The first driving assembly is connected with the first lens cone and / or the second lens cone, and the first driving assembly is used for driving the first lens cone and the second lens cone to move relatively so as to adjust the distance between the first reflecting mirror and the second reflecting mirror. The electronic equipment comprises a display screen and the camera module. The overall size and the system focal length of the camera module and the electronic equipment provided by the invention are adjustable.

The invention discloses a manual focusing auxiliary method, an imaging device and an automobile. The method includes: acquiring in real time the image captured by the lens during the process of manually adjusting the focal length of the lens; performing a focusing calculation on the image captured by the lens; judging and prompting the focusing effect of the lens in real time according to the result of the focusing calculation . The method provided by the invention provides users with a unified quantitative standard to measure the effect of manual focusing, and can effectively assist users to complete manual focusing.

In order to solve the problems of the prior art such as the small sizes of the images projected by the conventional on-board head-up display systems and the limited information displayed by the projected images, the invention provides an on-board head-up display system comprising a display screen assembly and a three-reflection type optical assembly. The three-reflection type optical assembly comprises a zoom lens assembly, an image quality compensation lens assembly, and a front windshield compensation lens assembly, which are sequentially arranged on an optical path. The zoom lens assembly comprises a zoom lens body and a zoom lens focusing assembly. The image quality compensation assembly comprises an image compensation lens body and an image compensation lens focusing assembly. The on-board head-up display system is advantageous in that the continuous zooming can be realized, and the projected image can be magnified by a plurality of times even dozens of times, and the position of the image surface can be remained; the image surface quality is stable, and the image surface cannot be fuzzy or deformed because of the magnification; the abundant information can be provided for the driver in the limited space, and the technical guarantee can be provided for the enriching of the use functions of the on-board head-up display system.

The invention provides an array waveguide grating demultiplexer chip of a cladding integrated micro lens and a preparation method of the array waveguide grating demultiplexer chip, and is used for solving the technical problem that the photoelectric conversion efficiency is low when an existing array waveguide grating demultiplexer chip is coupled with a detector in the vertical direction. According to the array waveguide grating demultiplexer chip prepared by the preparation method, a micro lens is processed on the surface of a cladding of a 45-degree total reflection light path by utilizing a semiconductor process, a light beam is horizontally propagated to an output waveguide in a core region layer, is reflected by a 45-degree total reflection angle at the output waveguide, and passes through the cladding in the vertical direction; and the micro-lens corresponding to the core area layer on the cladding is used for focusing, the size of the light beam is reduced, most of light beam energy of the light beam can be received by the light receiving surface of the detector, the optical coupling efficiency is improved, the distance between the chip and the detector does not need to be reduced due to the existence of the micro lens, the coupling distance between the chip and the detector is increased, the coupling packaging difficulty is reduced, and the efficiency is improved.

The invention discloses a driving device for a camera lens and relates to the technical field of cameras. The invention comprises a camera body, the side of the camera body is connected with a light-introducing inner cylinder; a spiral chute is opened on the peripheral side of the light-introducing inner cylinder, and the light-introducing inner cylinder is matched with a rotating cylinder and a moving cylinder respectively, and the rotating cylinder is located between the moving cylinder and the moving cylinder. between the camera bodies; wherein, the rotating cylinder is connected to the peripheral side of the light-introducing inner cylinder; a first spiral slide bar is arranged between the rotating cylinder and the light-introducing inner cylinder. The present invention drives the drum to rotate through the driving mechanism. Since the chute is slidingly matched with the slider, the first helical slider will slide along the helical chute, and then the first helical slider will push the second helical slider to helically slide, and finally While realizing the rotation of the moving cylinder, it also moves along the axial direction of the light-incoming inner cylinder to realize the adjustment of the focal length. This adjustment method is simple, and the action of the driving mechanism can be controlled by electronic control, which is convenient for people to take pictures.

The invention discloses a display panel, display equipment and a terminal. The display panel comprises a first folding screen and a second folding screen, the first folding screen comprises a camera shooting area; a front camera and a rear camera are arranged in the camera shooting area; the second folding screen and the first folding screen can be folded relatively, and the second folding screen comprises a focus expansion area corresponding to the camera shooting area; and the focus expansion area is provided with a focus expansion lens. The front-facing camera is located below the first folding screen, and the zoom lens is located below the second folding screen, so that hole digging of the folding screens is avoided, and full-screen display is realized. Meanwhile, when the first folding screen and the second folding screen are relatively folded, the focus expansion lens can be overlapped with the front camera or the rear camera, so that the length of the front camera or the rear camera is indirectly increased, the focus of the front camera or the rear camera is expanded, and therefore, on the premise that the length of the camera is limited, the focal length of the camera is adjusted, and the practicability of the terminal is improved.

An embodiment of the invention relates to a lens system. The lens system comprises a left lens device, a right lens device, a chip and a motor, wherein the left lens device comprises a left shell, a left film, a left annular support frame, a left piston gas-liquid bag and a left gas-liquid control valve; the right lens device comprises a right shell, a right film, a right annular support frame, a right piston gas-liquid bag and a right gas-liquid control valve; the chip is used for generating motor control data, left gas-liquid control valve control data or right gas-liquid control valve control data; the left gas-liquid control valve changes the diameter of a left liquid guiding tube, or the right gas-liquid control valve changes the diameter of a right liquid guiding tube; the motor controls first stepping of a left piston push rod, so that first fluid with first injection amount in the left piston gas-liquid bag flows into a left first inner cavity; the first quantitative deformation of the left film is increased under the pressure of first fluid; the first curvature of the left film is increased; and therefore, the left film is adjusted to achieve a first reduction control focal length.

The invention belongs to the technical field of infrared sensors, and particularly relates to a pyroelectric infrared sensor and a packaging method thereof. The packaging method of the pyroelectric infrared sensor comprises the following steps: S1, preparing a semi-finished product of a pipe cap: arranging a window on the pipe cap, and embedding an infrared optical filter on the window; s2, preparing a semi-finished product of the substrate: forming a solder paste integrally-formed supporting piece bonding pad on the substrate, and coating the solder paste on the solder paste integrally-formed supporting piece bonding pad; enabling the substrate coated with the solder paste to pass through a reflow soldering furnace to melt tin and solidify, and forming the solder paste integrally-formed supporting piece on the solder paste integrally-formed supporting piece bonding pad; s3, an infrared sensitive element is installed, wherein the infrared sensitive element is installed on the solder paste integrally-formed supporting piece; and S4, mounting a pipe cap: mounting the pipe cap on the upper surface of the substrate. According to the solder paste integrally-formed supporting piece, the number of used raw materials and parts is small, and the working procedure is simple.

The present invention relates to the field of object position detection, in particular to a detection system for illegal docking of ships, including a photographing device, the photographing device includes a lens assembly and an adjustment assembly, and the lens assembly includes a first transparent elastic sheet, a second transparent elastic sheet, a connecting column and Connecting sleeve, one end of the connecting column is connected to the first transparent elastic sheet, the other end is connected to the second transparent elastic sheet, the connecting sleeve covers the first transparent elastic sheet and the second transparent elastic sheet, and both sides of the connecting sleeve are provided with the first transparent elastic The light-transmitting hole of the sheet and the second transparent elastic sheet, the connection sleeve is made of flexible material, and the connection sleeve is filled with transparent liquid, and the adjustment assembly includes a driving part, which is arranged on one side of the lens assembly. The driver drives the edges of the first transparent elastic sheet and the second transparent elastic sheet to approach each other, and at this time, the refractive index of the lens assembly changes to adjust the focal length of the lens, thereby making the shooting effect clearer and the detection data result more accurate.

The invention provides an image electronic device and a driving method. The image electronic device comprises a barrel-shaped container; a conductive liquid and an insulating liquid, which have the same density but different optical refractive indexes, are not mutually dissolved and are filled in the barrel-shaped container; an image electronic device, which is positioned at one end of the barrel-shaped container and is in contact with the conductive liquid; a light-transmitting window, which is positioned at the other end of the barrel-shaped container and is in contact with the insulating liquid; a first electrode, which is connected with the conductive liquid; an electric field is formed between the second electrode and the conductive liquid; and a voltage source, which applies a variable voltage between the first electrode and the second electrode. The voltage source can change the shape of the interface of the conductive liquid and the insulating liquid so as to form a variable-focus liquid lens. The liquid lens and the image electronic device are integrated, the light utilization rate is improved, and the image electronic device is miniaturized.

The embodiment of the invention provides a camera module and electronic equipment. According to the camera module, a support assembly is arranged on a shooting assembly in a sleeving mode, the shooting assembly is rotationally connected with the support assembly through a first rotating shaft, a first electro-deformation part is located in the support assembly, the first electro-deformation part is connected with the shooting assembly, and the first electro-deformation part is switched between a first form and a second form; under the condition that the first electro-deformation part is electrified, the first electro-deformation part extends and is in a first form, and the shooting assembly keeps still relative to the support assembly; under the condition that the first electro-deformation piece is powered off, the first electro-deformation piece is shortened, the first electro-deformation piece is in the second form, and the first electro-deformation piece drives the shooting assembly to rotate around the first direction relative to the support assembly.

The invention relates to the technical field of analysis equipment, and provides projector equipment for improving definition by using an electromagnetic rotating wheel. The projector equipment comprises the projector equipment, the center of the inner side of the projector equipment is movably connected with a movable regulation and control frame, and the left side and the right side of the projector equipment are fixedly connected with curved clamping plates; the left side and the right side of the projector equipment are movably connected with electromagnetic rotating wheels through curved clamping plates, and the bottom end of the projector equipment is movably connected with a bottom end supporting framework through the movable regulation and control frame. According to the projector equipment for improving definition by using the electromagnetic rotating wheel, when the electromagnetic rotating wheel rotates, according to repulsion between different magnetic poles, anelectromagnetic rotating rod is driven to move towards the lower side, the electromagnetic rotating rod drives the curved clamping plate to shift downwards, the curved clamping plate extrudes the air bag column, the air pressure in the air bag column is extruded, and the air is sprayed out of the air bag column, so that the situation that the temperature in the air bag column is relatively high, water in the air is evaporated, and dust remains in the air is prevented, and the viewing visual effect is improved.