121results about How to "Improve light uniformity" patented technology

The invention discloses a diffractive optical waveguide and a preparation method thereof, and a head-mounted display device, and relates to the technical field of augmented reality, and the preparation method of the diffractive optical waveguide comprises the steps: obtaining a target eye box range adaptive to a target crowd; according to the human eye parameters of each user group in the target group, splitting the target eye box range to obtain sub-eye box ranges adapted to each user group; diffractive optical waveguides adapted to the user groups are prepared based on the sub-eye box ranges, and the area of a coupled-out grating in each diffractive optical waveguide is smaller than the area of a coupled-out grating of an optical waveguide designed for covering the target eye box range. The optical efficiency and uniformity of the diffractive optical waveguide can be ensured, and the diffractive optical waveguide is prevented from generating obvious rainbow lines, so that the use experience of a user is improved.

The invention discloses a line light source generation device, and relates to the technical field of laser equipment. The linear light source generating device comprises a vertical cavity surface emitting laser light source and a light guide column, the two ends of the light guide column are provided with an incidence end face and a reflection end face respectively, the peripheral face of the light guide column comprises a reflection side face and a light emitting side face, and the incidence end face and the reflection end face both incline to the axis of the light guide column. The incident end face of the light guide column is obliquely arranged, so that light beams emitted by the vertical cavity surface emitting laser light source are refracted when entering the light guide column from the incident end face, light rays in the light guide column have a complex and zigzag propagation path, the light emitting uniformity of the light emitting side face can be improved, and dark areas and bright spots are reduced; moreover, light loss can be reduced, and light output power is improved.

The invention relates to the field of lamp structures, in particular to a panel lamp with lamp beads convenient to replace, which comprises a base, the lamp beads which are detachably connected to the base and can be electrified to emit light, and a lampshade which is detachably connected to the base and allows light to penetrate through, the lampshade comprises a frame with the outer side edge rotationally connected to the base and a light guide plate detachably connected to the periphery of the inner side of the frame, the frame is slidably connected with a movable rod capable of being inserted into the base, the position, capable of being inserted into the base, of the movable rod is fixedly connected with a lock rod, and the lock rod can be inserted into the base in the moving direction of the movable rod. And a lock spring for forcing the lock rod to be tightly inserted into the base is arranged in the frame, so that no gap exists on the lampshade, and the influence on the light emitting uniformity of the lampshade is reduced.

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a substrate, a plurality of light-emitting units, a touch grid layer and a heightening part. Through the touch grid layer and the heightening part, the large-view-angle light-emitting amount of the side, close to the heightening part, of the first light-emitting unit can be reduced, so that the large-view-angle light-emitting amounts of the first light-emitting device in different directions are kept consistent as much as possible, the light-emitting uniformity of the display panel can be improved, and the color cast problem of the display panel is solved.

This invention relates to the field of laser special light source technology, and provides a laser-driven white light source device, which includes a laser source, an optical system, a gas-loaded structure, and a high-voltage driving component. The laser source is suitable for providing a laser beam; the optical system is suitable for focusing the laser beam; the gas-loaded structure is located on the side of the optical system away from the laser source, and the center of the gas-loaded structure corresponds to the focusing area of ​​the laser beam; the high-voltage driving component is suitable for igniting plasma within the gas in the gas-loaded structure; wherein, the gas-loaded structure has a gas carrier incident surface and a gas carrier exit surface arranged opposite each other along the propagation path, and the curvature of the gas carrier incident surface and the gas carrier exit surface is constant in the direction perpendicular to the propagation path. This application can reduce the generation of aberrations, thereby reducing the size of the emitting point and resulting in better consistency of the emitting point; at the same time, the uniformity of white light output and the spectral radiance are also better.

This invention provides a light guide element comprising a main body and an optical microstructure recessed into the bottom surface of the main body. The optical microstructure includes a light-facing surface and a backlight surface, respectively facing and away from the light-incident surface of the main body. The light-facing surface has a first section line on a first pseudo-plane perpendicular to the light-incident surface and parallel to the bottom surface, and a second section line on a second pseudo-plane parallel to the light-incident surface and perpendicular to the bottom surface. The first pseudo-arc line passes through a first vertex near the light-incident surface and multiple first endpoints away from the light-incident surface in the first section line. The second pseudo-arc line passes through a second vertex near the light-outcident surface and multiple second endpoints away from the light-outcident surface in the second section line. The radius of curvature R of the second pseudo-arc line is... xz The radius of curvature R greater than that of the first pseudo-arc xy The width W of the optical microstructure in the first direction parallel to the incident surface and the bottom surface. x The width W is greater than the width in the second direction, which is perpendicular to the incident light surface and the first direction and parallel to the bottom surface. y The light guide element and the backlight module having the light guide element of the present invention can improve the uniformity of light output.

The present invention discloses a semiconductor lead frame processing equipment for an automobile interactive taillight and its products, which relate to the field of semiconductor technology, including a workbench unit, an integrated processing unit, and a plurality of integrated processing units are arranged on the top of the operating table. The downward movement of the push-out bottom plate inside the integrated processing unit completes the downward positioning of the coil inside the positioning frame and limits the downward pressure of the electric test pin pre-welded on the top of the coil, thereby reducing the offset of the electric test pin during the stamping process of the stamping block, and the pressing of the stamping block and the electric test pin will form an injection channel that is connected to the construction cavity, thereby completing the stamping modeling, that is, the coil on the top surface of the middle sleeve hollow block, the push-out bottom plate, the stamping block, the surrounding plate, and the bearing plate forms a sealed mold cavity between the construction cavity and the positioning frame, so that the side wall of the reaction cup and the mouth of the reaction cup are injection molded inside the mold cavity, thereby reducing the time consumption of re-clamping and re-injection molding to form the side wall of the reaction cup and the mouth of the reaction cup after stamping.

The application discloses a multi-lamp-bar type lamp strip structure and relates to the field of mechanical equipment for textile industry, which comprises a long-strip-shaped mounting plate and an LED lamp bar, the LED lamp bar comprises a strip-shaped conductive substrate and a plurality of lamp beads arranged on the conductive substrate, the conductive substrate is arranged on one side of the mounting plate and detachably fixedly connected with the mounting plate through a threaded part, a plurality of the lamp beads are arranged in multiple rows along the width direction of the conductive substrate; and the lamp beads comprise white light lamp beads and purple light lamp beads, a plurality of the purple light lamp beads are uniformly arranged along the length direction of the conductive substrate and form a purple light lamp strip, and a plurality of the white light lamp beads are uniformly arranged along the length direction of the conductive substrate and form a white light lamp strip. Through the dual-light-source space cooperation, the end brightness compensation, the modular heat dissipation and the quick maintenance architecture, the application precisely matches the strict requirements of the cotton foreign fiber removing equipment on the light source stability and the imaging uniformity, finally realizes efficient and durable lighting support, and improves the comprehensiveness and sensitivity of the foreign fiber machine in detecting foreign fibers.

The invention discloses a high-power ultraviolet dodging lighting device, which sequentially comprises an optical fiber device, a dodging device and a relay lens group along a light beam propagation direction, and is characterized in that a light beam emitted by the optical fiber device is dodged by the dodging device, is amplified by the relay lens group and then reaches an irradiation surface; the relay lens group comprises a first lens, a second lens, a third lens and a fourth lens, the first lens and the second lens are used for amplifying light spots, and the third lens and the fourth lens are used for improving the uniformity of the amplified light spots. The embodiment of the invention can improve the illumination uniformity and the light source utilization rate, simplify the structure, and can be widely applied to the technical field of optical devices.

The utility model relates to a direct type backlight module capable of improving peripheral brightness and a display device, and the direct type backlight module capable of improving peripheral brightness comprises a back frame which is provided with a bottom plate and a side wall surrounding the edge of the bottom plate; the lamp panel is positioned on the bottom plate and is provided with a plurality of light-emitting parts which are arranged in an array form; the reflection sheet is located on the lamp panel and provided with a plurality of reflection cups, the reflection cups are adjacent to one another and arranged in an array mode, the bottom face of each reflection cup is provided with an opening, and the light-emitting pieces are located in the openings; the side wall is arranged on the bottom plate, the diffuser plate is arranged on the side wall, the reflector plate further comprises a plurality of protruding parts, each protruding part is higher than the side wall and extends in the direction away from the bottom plate, and the bottom face of each protruding part abuts against the top of the side wall.

The utility model relates to a clothes airing machine with a curved screen. The utility model relates to a clothes airing machine with a curved surface screen. The clothes airing machine comprises a curved-surface-shaped lighting module, the lighting module comprises a light guide body and at least one light emitting body, the light guide body is in a U shape in the width direction and extends to be in a curved surface shape in the length direction, and the light emitting body is tightly arranged along the U-shaped side of the light guide body. The shape of the luminous body is matched with the shape of the light guide body, and the length of the luminous body is smaller than or equal to the U-shaped arc length of the light guide body. According to the clothes airing machine with the curved surface screen, the curved surface luminous body is arranged on the side edge of the curved surface type light guide body, light rays are guided out through the curved surface type light guide body, and large-angle uniform light emitting is achieved; meanwhile, the lighting module is simple in structure, and dust or mosquitoes can be prevented from entering the light guide body to form shadows to affect use of a user.

The utility model relates to the technical field of automobile lamps, and discloses a low-beam lens module. The low-beam lens module comprises a lens support assembly which comprises a lens support and a light type baffle which are integrated; the outer lens is arranged on the lens bracket, and the outer lens is positioned on one side of the light type baffle plate in the first direction; the inner lens is arranged on the lens support and located on the other side, in the first direction, of the light type baffle; the light-emitting assembly is arranged on the side, away from the light type baffle, of the inner lens in the first direction, and light output by the light-emitting assembly can sequentially pass through the inner lens and the light type baffle and is emitted out of the outer lens. According to the technical scheme, the installation steps of the low-beam lens module are simplified, in the assembly process, parts do not have the overturning process, automatic installation is facilitated, and the assembly efficiency is improved.

The invention provides a light-emitting device structure and a preparation method thereof, and the light-emitting device structure comprises a buffer layer which is made of a transparent material; the light-emitting structure is located on one side of the buffer layer, and the light-emitting structure is provided with at least one light-emitting unit; wherein the buffer layer is provided with at least one micro-lens structure, the micro-lens structure is provided with at least two sub-layers, and one light-emitting unit corresponds to the at least one micro-lens structure. The buffer layer made of the transparent material is utilized to manufacture the micro lens structure, on one hand, the total reflection problem is relieved, the light emitting efficiency of the light emitting device is improved, on the other hand, the micro lens structure does not need to be additionally manufactured, and the production cost is reduced.

The present invention discloses a rotatable light-receiving pipeline-type microalgae cultivation reactor, comprising a processing base, a positioning support plate, a storage tank body, a feeding pipeline, a moving block, a rotating drive component, a light-emitting board, and a moving drive component; the present invention drives the feeding pipeline to rotate continuously by the rotating drive component, so that when the feeding pipeline circulates and transports microalgae liquid, the microalgae liquid inside the feeding pipeline will rotate along with the feeding pipeline, so that the microalgae liquid inside the feeding pipeline can be evenly light-received, and the phenomenon that one side of the feeding pipeline receives strong light while the other side receives weak light will not occur, thereby improving the light-receiving uniformity of the microalgae liquid inside the feeding pipeline.

The utility model discloses an adjustable light-emitting diode (LED) fish gathering lamp with a wide-angle lighting and forced air cooling structure, which comprises a lamp body shell, a lamp arranged in the lamp body shell, a heat dissipation fan, a wide-angle lens arranged at the bottom of the lamp body shell and used for increasing the lighting range, and a light diffusion plate arranged at the bottom of the lamp body shell. A heat dissipation air channel used for enhancing the heat dissipation effect is arranged in the lamp body shell, an adjustable installation part is arranged on one side of the lamp body shell, the illumination intensity and the illumination range are optimized, 165-degree wide-angle illumination is adopted to cover a fishing boat operation area, and the illumination uniformity is greatly improved. And a heat dissipation air channel is optimized, and forced air cooling is adopted, so that the junction temperature of the LED is greatly reduced, and light attenuation is delayed. The fishing boat has the functions of being adjustable in installation and convenient to adjust, adjustment at any time in daily use is facilitated, and various installation modes of the installation part are suitable for various fishing boat scenes.

The utility model discloses a novel light guide plate with uniform light distribution relates to novel light guide plate technical field, this novel light guide plate with uniform light distribution includes novel light guide plate, and the novel light guide plate four corners are all connected with fixed clamp seat, the utility model discloses, light guide plate adopts gradual change compound dot, and the design of circular dot and rhombus dot is combined with the layout of optical simulation optimization, and the optimization surface light intensity solves the problem of uneven light emission from the light conduction source, and the nanometer diffusion film cooperates with the micro prism brightening layer, and the light is regulated by secondary scattering and total reflection, and the light emission uniformity is improved 40% than traditional light guide plate, and effectively eliminates bright spot, dark area, and adapts high -end display, precision lighting scene.

The utility model relates to the technical field of welcome lamps, and discloses a focal length adjustable welcome lamp which comprises an upper cover, a lens A is in lap joint with the top of the inner wall of the upper cover, a first gasket is arranged at the bottom of the lens A, the outer edge of the first gasket is fixedly connected with a lens barrel in a sleeved mode, and the outer edge of the lens barrel is in threaded connection with the inner wall of the upper cover. Through cooperative use of the upper cover and the lens barrel, threaded connection between the upper cover and the lens barrel, and threaded connection between the lower cover and the lens barrel, the distance between the condensing lens and the imaging lens is adjusted by rotating the upper cover and assisting the lens barrel, so that the device is assisted in spiral focusing, and the imaging definition is adjusted to the optimal state. The lens B is made of plastic with the refractive index higher than that of the lens A, the lens C and the lens D so as to assist the device in eliminating chromatic aberration, the imaging lens is composed of a concave lens and a convex lens so as to assist the device in stably eliminating chromatic aberration, the lens F is of a concave-convex structure, and the lens E is of a biconvex lens so as to improve the illumination uniformity of the device.

The invention provides a quantum dot particle assembly and a preparation method thereof, a photoconversion device preparation method and quantum dot particles; the preparation method of the quantum dot particle assembly comprises mixing and drying a plurality of first polymer particles, a first quantum dot solution and a second polymer solution to obtain an assembly containing a plurality of quantum dot particles A, wherein the quantum dot particles A comprise a core of a first polymer particle, a second polymer shell formed by a second polymer, a plurality of first quantum dots are located in the second polymer shell, and the minimum size of the first polymer particles is greater than or equal to 0.3 mm. The process reduces damage to quantum dots and can improve the life of quantum dot application products.

The utility model discloses a kind of ultraviolet light curing devices, including shell, curing chamber is equipped in the shell, and curing chamber bottom is equipped with the load plate of load and drive workpiece to rotate uniform light, and load plate electrically connected with the driving motor installed in shell, curing chamber is installed with partition cover, and partition cover is sleeved in load plate outside.This ultraviolet light curing device, first, the rotation design of device through load plate, workpiece can be received ultraviolet light in curing process all-round evenly, ensure the consistency of curing quality, avoid the curing defect caused by uneven illumination, to improve curing efficiency and product quality;In addition, the optimization layout of UV light mechanism and the setting of reflector, further improve the illumination intensity and uniformity, shorten curing time, improve production efficiency.

The present application relates to a kind of nanosecond laser space-time control methods based on double-cone pair collision direct drive laser device, in the case of meeting the nearly isentropic compression waveform of driving implosion, the time waveform of all sub-beams in device is redistributed, a small part of beam is used to generate low-energy foot pulse, and is focused on larger target surface, target surface is slowly contracted under the action of low-energy foot pulse, and is contracted to a smaller target surface at the end of the duration of low-energy foot pulse, then the majority of remaining beam is used to generate driving main pulse, and is focused on this smaller target surface, so as to realize zooming.The method reduces the waveform contrast of sub-beam by redistributing the time-power curve of all sub-beams, can realize higher precision control of time-power curve on target surface, also effectively reduces the loss caused by energy transfer (CBET) of cross-beam by zooming, improves beam-target coupling efficiency, and improves the irradiation uniformity of target pellet.

The utility model provides a kind of low-power MiniLED backlight control system, it is related to LED backlight technical field, including light bar, the both ends of the light bar are provided with connecting head, multiple electric connecting pins are provided in the inside of two connecting heads, multiple installation clamping grooves are set in the upper end of the light bar, multiple lamp holders are clamped in the inside of multiple installation clamping grooves, multiple electrode pieces are provided in the left and right sides of the lower end of multiple installation clamping grooves, multiple control chips are connected to the lower end of the light bar, multiple control chips are respectively located in the lower end of multiple installation clamping grooves, and electrically connected with the two electrode pieces of the lower end of installation clamping groove, and multiple control chips are electrically connected with multiple electric connecting pins of the front and rear sides, the utility model is provided with multiple-pin connecting head in the both ends of light bar, lamp holder is clamped with light bar by installation clamping groove, electrode piece is electrically connected with control chip, so that lamp holder can be individually repaired and replaced, reduce maintenance cost, and support quick assembly and flexible expansion.

The invention discloses a wide light guardrail lighting fixture, comprising a lighting lamp and a convex lens cover, the convex lens cover comprising a focusing curved surface body and a light collecting curved surface body, the light collecting curved surface body is located on one side of the focusing curved surface body and connected to the focusing curved surface body, the focusing curved surface body and the light collecting curved surface body have the same installation plane, a lamp trough is provided on the installation plane and on the part of the focusing curved surface body, a flaring groove and a connecting groove are provided on the installation plane and on the part of the light collecting curved surface body, the flaring groove is connected with the lamp trough through the connecting groove, and the lighting lamp is arranged in the lamp trough; in the direction of the structure being viewed from above, light is incident through the light incident surface of the lamp trough, and when it is emitted through the light emitting surface of the focusing curved surface body, light is formed to diverge to both sides; the patent of the invention utilizes the above structure to make the light diverge to both sides of the lighting fixture, forming a wider light beam, realizing a longitudinal light distribution with a pitch-to-height ratio of 8 to 10 times, and at the same time achieving good road lighting uniformity.

The utility model relates to the technical field of passenger car license plate lamps, and discloses an automobile uniform light license plate lamp which comprises a lamp shell upper half part, a lamp holder is arranged at the top end in the lamp shell upper half part, six LED lamp tubes are arranged on the lamp holder, the six LED lamp tubes are distributed in a V shape with the top end in the lamp shell upper half part as the center, and the LED lamp tubes are arranged in the lamp shell upper half part. The six LED lamp tubes do not influence one another; a transparent protective shell is arranged on the front face of the upper half portion of the lamp shell. The inner side patterns, the middle patterns and the outer side patterns are equal in width. According to the utility model, the optical patterns in the lamp housing are divided into areas for dialling light; the inner side patterns change the light rays which are directly irradiated to the license plate lamp by the LED, so that the light rays deflect towards the middle of the license plate; the middle patterns gather LED longitudinal light rays and effectively diffuse the light rays to the middle and the width part of the license plate; and the outer side patterns supplement the outward light of the LEDs to the lowermost end of the license plate, so that the light is flatly laid on the license plate, the uniformity of the lamp after loading is improved, and modular management of the lamp is facilitated.

The present application relates to the technical field of highway tunnel lighting, in particular to a tunnel portal flexible light guide lighting system and a lighting transition method, comprising: acquiring a response time delay parameter and an illumination cross distribution matrix; determining an illumination gap value of each road node according to the response time delay parameter, the illumination cross distribution matrix, a natural light illumination sequence, a current output duty cycle of each light emitting device and a preset safety illumination threshold; determining a final duty cycle allocation proportion of each light emitting device according to the illumination cross distribution matrix and the illumination gap value of each road node; determining a target control duty cycle of each light emitting device according to the final duty cycle allocation proportion of each light emitting device, a preset safety step duty cycle quota and the current output duty cycle of each light emitting device, and issuing the target control duty cycle of each light emitting device to the corresponding light emitting device. The present application improves the visual transition smoothness of the mixed lighting of the tunnel portal transition section as a whole.

The utility model discloses an optical structure of a signal lamp. The optical structure comprises a collimator, an equal-division collimation unit and a total reflection unit, the collimator is perpendicular to the light outlet, the propagation direction of light rays collimated by the collimator is perpendicular to the final light outlet direction of the light rays of the light outlet, the equal-division collimation unit is located in the light emitting direction of the collimator, and the equal-division collimation unit is located on one side of the light outlet. The equal-division collimation unit is used for equally dividing light rays collimated by the collimator into a plurality of parts and changing the propagation direction of the light rays so as to reflect part of the collimated light rays to the light outlet, the total reflection unit is located on one side of the equal-division collimation unit, the equal-division collimation unit is located between the light outlet and the total reflection unit, and the total reflection unit is located on the other side of the equal-division collimation unit. And the total reflection unit is used for receiving the other part of collimated light of which the direction is changed by the equant collimation unit. The LED lamp has the advantages of flexibly changing the angle of the light, improving the utilization rate of the light and improving the lighting uniformity.

The invention provides a light-emitting assembly, a ceiling assembly and a vehicle. The light-emitting assembly is applied to the vehicle. The vehicle comprises an outer ceiling. The light-emitting assembly comprises an inner ceiling and a light-emitting component; the inner ceiling is arranged on the inner peripheral side of the outer ceiling, is spaced from the outer ceiling and is used for connecting skylight glass; the light-emitting assembly is arranged between the outer ceiling and the inner ceiling, and light emitted by the light-emitting assembly can be emitted to the interior of the vehicle from the position between the outer ceiling and the inner ceiling. The part, close to the skylight glass, of the ceiling is partially divided into the inner ceiling and the outer ceiling, the light-emitting assembly is arranged between the inner ceiling and the outer ceiling, the annularly-arranged light sources can be arranged so as to reduce uneven vision caused by light decay, the light sources are matched with the light uniformizing cover so that the illumination uniformity can be further improved, local bright spots can be avoided, and the service life of the ceiling is prolonged. In addition, the inner ceiling, the light-emitting assembly and the skylight glass can be conveniently and integrally supplied, supply of multiple suppliers is not needed, and the packaging, transporting and assembling cost of parts is reduced.

The utility model relates to a backlight module and a display device. A backlight module comprises a back frame, a light source, a diffusion plate and a sleeve. The diffusion plate is arranged on the back frame and located on the light emitting side of the light source. The sleeve is arranged on the back frame and penetrates through the lamp panel and the diffusion plate in the axial direction of the back frame. The diffusion plate is provided with a plurality of printing dots, and the diffusion plate is defined to be provided with a blank area allowing the sleeve to penetrate through and a first area surrounding the blank area. The first area comprises a high-density area and a low-density area, no printing dots exist in the blank area, and the distribution density of the printing dots in the high-density area is larger than the average distribution density of the low-density area. By means of the design of different distribution densities of the printing dots, the bright halo generated by the arrangement of the sleeve is overcome, and the light emitting uniformity and the optical grade of the whole light emitting surface are improved. The utility model further provides a display device comprising the backlight module.

The present application relates to a kind of light conversion plate, Mini-LED display device and related preparation method, it is related to semiconductor display technical field.In the preparation method of the light conversion module for Mini-LED display device in the present application, by forming the first surface and the second surface of glass substrate first light conversion block, first light scattering block, second light conversion block and second light scattering block are alternately distributed, wherein the density of light conversion particle in the first light conversion block is greater than the density of light conversion particle in the second light conversion block, the density of light scattering particle in the second light scattering block is greater than the density of light scattering particle in the first light scattering block, by optimizing the structure of each light conversion block and each scattering block and the density relationship of light conversion particle, light scattering particle, light conversion efficiency and light uniformity are greatly improved.

The invention discloses a display device. A display device of the present invention may include: a display panel; a frame located behind the display panel and coupled to the display panel; a substrate on the frame between the display panel and the frame; a light assembly mounted on the substrate and providing light to the display panel; and a reflective sheet on the frame and the substrate, having a hole through which the light assembly passes, reflecting light provided by the light assembly to the display panel, the frame may include: a sheet supporting portion supporting the reflective sheet; a substrate support portion forming a step lowered from the sheet support portion and forming a gap with the reflective sheet; and a cutting part which penetrates through the frame at one side of the substrate supporting part and has an opening, and the substrate can be positioned on the substrate supporting part of the frame and inserted into the cutting part.

The utility model discloses an annular light source with an adjustable light-emitting angle. The annular light source comprises a shell, a plurality of light-emitting assemblies and a plurality of adjusting mechanisms. The shell is provided with a shooting window, an opening is formed in the face, opposite to the shooting window, of the shell, the multiple light-emitting assemblies are rotationally connected with the inner wall of the shell and located between the shooting window and the opening, and the multiple light-emitting assemblies are arranged in the circumferential direction; the multiple adjusting mechanisms are connected with the shell and correspond to the multiple light-emitting assemblies in a one-to-one mode. According to the scheme, the adjusting mechanism is used for driving one corresponding light-emitting assembly to rotate, namely, the light-emitting angle of each light-emitting assembly can be adjusted, so that the flexibility of supplementing light to an object by the annular light source is improved, and particularly, good illumination uniformity can be brought to the object with a curved surface or a concave-convex surface; and the reflective surface of the object can be avoided by adjusting the local light-emitting angle of the light-emitting assembly, so that the application scene of the annular light source can be expanded.