Lifting combined type lighting device based on optical eye protection lighting and dimming system

Abstract

The invention provides a lifting combined type lighting device based on optical eye protection lighting and a dimming system.The lifting combined type lighting device based on optical eye protection lighting comprises a lifting structure and a dimming structure, the lifting structure comprises a fixing shell, a lifting roller assembly and a lifting rope, the lifting roller assembly is installed in the fixing shell, and the lifting rope is installed in the fixing shell; the lifting rope is wound on a winding part of the lifting roller assembly; the dimming structure comprises a lamp shell, a control panel, a light source and a liquid crystal lens assembly, the lamp shell is connected to the lifting rope, the control panel is installed in the lamp shell, the light source is installed on the control panel, the liquid crystal lens assembly is installed on the control panel and covers the light source, and the light source and the liquid crystal lens assembly are electrically connected to the control panel. Illumination of light passing through the liquid crystal lens assembly is distributed in a Gaussian function mode, and the diameter of light spots of the light passing through the liquid crystal lens assembly is constant. Illuminance is distributed in a Gaussian function mode, and visual adjustment fatigue is restrained; precise lighting and eye protection are achieved through cooperation of lifting of the lifting roller assembly and dynamic dimming of the liquid crystal lens assembly.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lighting fixtures, and in particular to a lifting and combining lighting device and a dimming system based on optical eye-protection lighting. Background Art

[0002] As the core device providing light, lighting fixtures have the fundamental function of ensuring visual clarity and safety, while also providing a concentrated light source for directional illumination. As users' demands for a more refined visual experience increase, eye protection and comfort have become key indicators for lighting fixtures.

[0003] Although ordinary eye protection lamps can relieve visual fatigue through color temperature adjustment and flicker-free design, it is difficult to balance anti-glare performance and light spot uniformity, especially when multiple light sources are used in combination, which easily leads to light spot overlap or dark areas; conventional anti-glare technology relies on increasing the shading angle or using a diffuser. Although it can suppress direct glare, it leads to significant loss of light efficiency and cannot dynamically adapt to the light distribution requirements of different scenes; the light spot consistency control of fixed lighting devices is limited to a single height. When the lamp needs to be raised or lowered due to changes in the scene, the light spot shape, illumination uniformity and glare index will deviate significantly, seriously affecting the lighting quality and unable to dynamically adapt to the eye protection needs of different scenes.

[0004] For example, the comparative document CN202020029541.8 discloses an LED eye-protection classroom lamp, which includes a cover and a boom, wherein the cover includes a top plate and an opening opposite to the top plate; the LED eye-protection classroom lamp also includes a circuit board, an LED, a diffuser, a grille, a frame assembly, a fixing bracket, and a mounting bracket; the first end of the boom is connected to two first clamping blocks, and the mounting bracket is provided with a first bayonet, which is clamped between the two first clamping blocks; the mounting bracket includes a mounting plate, which is provided with a mounting hole; the second end of the boom is connected to two second clamping blocks, and the fixing bracket is provided with a second bayonet, which is clamped between the two second clamping blocks; the fixing bracket also includes a fixing plate, which is connected to the outside of the top plate; the circuit board is connected to the cover, and the LED is connected to the circuit board; the diffuser plate and the grille are arranged in sequence along the direction from the top plate to the opening, and the frame assembly connects the diffuser plate and the grille to the opening. This solution uses a diffuser plate to suppress glare, but the loss of light efficiency is significant, and it cannot dynamically adapt to the light distribution requirements of different scenes.

[0005] Another example is a hanging eye-protection classroom lamp disclosed in the comparative document CN202321215389.2, which includes a lamp stand with a plurality of light strips arranged below the lamp stand, and symmetrically distributed connecting frames arranged above both sides of the lamp stand; a fixing seat, which is fixedly installed in the upper middle part of the lamp stand, and controls the retraction and extension of the lifting rope after the bobbin rotates through the structure of the lifting rope and the bobbin, thereby controlling the upper and lower heights of the lamp, so that it can be adjusted according to the needs of the internal light strips and students, and the angle of the lamp stand can be adjusted through the structure of the rotating wheel. However, during the lifting process of the hanging eye-protection classroom lamp of this scheme, the light spot shape, illumination uniformity and glare index generated by the light strips in the lamp stand will be significantly offset, seriously affecting the lighting quality. The hanging eye-protection classroom lamp cannot dynamically adapt to the eye protection needs of different scenes. Summary of the Invention

[0006] The purpose of the present disclosure is to overcome the shortcomings of the existing technology and provide a lifting combined lighting device and dimming system based on optical eye protection lighting that dynamically adapts to changes in lifting position and has a constant light spot diameter to reduce visual fatigue.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A lifting combined lighting device based on optical eye protection, the lifting structure includes a fixed shell, a lifting roller assembly and a lifting rope, the lifting roller assembly is installed in the fixed shell, the lifting rope is wound around the winding portion of the lifting roller assembly, and the lifting roller assembly is used to wind and lift the lifting rope;

[0009] The dimming structure includes a lamp housing, a control panel, a light source and a liquid crystal lens assembly. The lamp housing is connected to the lifting rope, the control panel is installed in the lamp housing, the light source is installed on the control panel, the liquid crystal lens assembly is installed on the control panel and covers the light source, the light source and the liquid crystal lens assembly are electrically connected to the control panel, respectively. The light source is used to emit light, and the liquid crystal lens assembly is used to change the light beam angle. The illumination of the light from the light source passing through the liquid crystal lens assembly is distributed as a Gaussian function, and the spot diameter of the light passing through the liquid crystal lens assembly is constant.

[0010] In one embodiment, the lifting structure further includes a redirecting roller assembly, and the number of the redirecting roller assemblies and the lifting rope is multiple. The redirecting roller assemblies are arranged at intervals along the circumference of the lifting roller assembly. One end of the lifting rope is wound around the lifting roller assembly, and the other end of the lifting rope passes through the redirecting roller assembly and is connected to the lamp housing.

[0011] In one embodiment, the lifting roller assembly is provided with a plurality of arc grooves in sequence along the radial direction, and each of the redirecting roller assemblies includes a fixed pulley and a steering pulley. The fixed pulley is arranged in parallel with the arc groove corresponding to the lifting roller assembly, and a plurality of steering pulleys are arranged at intervals along the circumference of the lifting roller assembly. Each fixed pulley is arranged corresponding to a steering pulley, and one end of the lifting rope passes through the steering pulley and the fixed pulley in sequence and is fixed in the corresponding arc groove.

[0012] In one embodiment, there are multiple liquid crystal lens assemblies and multiple light sources, and the multiple liquid crystal lens assemblies are spaced apart on the control board, and each liquid crystal lens assembly covers the corresponding light source.

[0013] In one embodiment, the shape of the lamp housing is a square structure; or, the lamp housing is a circular structure; or, the lamp housing is a special-shaped structure.

[0014] In one embodiment, the dimming structure includes a light-transmitting plate, and the light-transmitting plate is disposed below the liquid crystal lens assembly.

[0015] A dimming system is applied to the optical eye protection lifting combined lighting device described in any of the above embodiments, wherein the peak illumination I of the light source passing through the liquid crystal lens assembly is a Gaussian function distribution, and the dimming system satisfies the following Gaussian function distribution relationship:

[0016] The illumination E of the dimming system satisfies the following relationship: E1:E2=1:3,

[0017] Among them, θ is the angle of the edge of the working area, c is the Gaussian width coefficient, and the beam angle θ is changed by controlling the voltage of the liquid crystal lens; E is the illumination of the dimming system, E1 is the illumination at the center of the working surface, E2 is the illumination at the edge of the working area, it is 2 / 3 of the maximum illumination within the working area, and 1 / 3 of the maximum illumination transition disappears outside the working area, I1 is the maximum light intensity Imax, d1 is the vertical height from the liquid crystal lens assembly to the working surface, θ1 is the central illumination angle 0°, I2 is the light intensity at the edge of the working area, d2 is the distance from the liquid crystal lens assembly to the edge of the working area, and r is the radius of the working surface.

[0018] In one embodiment, the dimming system also satisfies the following relationship: the central light intensity Light intensity I in the working area a =Imax / 2, the central light intensity Imax=e (0)=1, a=-4*ln(0.5) * c 2 ; Among them, the half-intensity angle is a and the center angle is 0.

[0019] In one embodiment, the beam angle θ at the edge of the working area ranges from 0° to 55°.

[0020] In one embodiment, the vertical height d1 from the liquid crystal lens assembly to the working surface ranges from 0.8 m to 2.3 m.

[0021] Compared with the prior art, the present disclosure has at least the following advantages:

[0022] The above-mentioned lifting combined lighting device based on optical eye protection controls the extension and retraction of the lifting rope through the lifting roller assembly, flexibly adjusts the height of the light source, adapts to the illuminated work surface, and maintains a good working distance between the light source and the work surface, thereby reducing glare and visual fatigue; after the light source passes through the liquid crystal lens assembly, the illumination is distributed in a Gaussian function, so that a bright central light spot is formed on the work surface and the edge light slowly disappears, thereby suppressing the visual adjustment fatigue caused by the light and dark boundaries; during the lifting process, the beam angle of the liquid crystal lens assembly is adjusted so that the light dynamically adapts to the influence of the lifting position change on the light spot, thereby keeping the light spot constant and avoiding the diffusion or contraction of the light spot, thereby eliminating the visual adaptation burden, and achieving precise lighting eye protection effect through the coordinated lifting and lowering of the lifting roller assembly and the dynamic dimming of the liquid crystal lens assembly.

[0023] The illuminance of the light source of the dimming system after passing through the liquid crystal lens assembly is distributed as a Gaussian function, so that the light is irradiated on the working surface to form a light spot with a bright center and a slowly changing Gaussian distribution of illuminance at the edge of the light spot, avoiding visual fatigue caused by sudden changes in light and dark, and producing an optical eye protection effect; the dimming system dynamically adjusts the angle θ and Gaussian width coefficient c of the edge of the working area through voltage to achieve real-time matching of the light spot shape with the working surface, achieving an eye-protection lighting effect with a constant light spot shape, optimized illuminance uniformity and suppressed visual fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a structural schematic diagram of a lifting combined lighting device based on optical eye protection according to an embodiment;

[0026] Figure 2 for Figure 1An exploded view of the lifting combined lighting device based on optical eye protection is shown;

[0027] Figure 3 for Figure 1 A partial structural diagram of a lifting combined lighting device based on optical eye protection is shown;

[0028] Figure 4 for Figure 1 Another structural schematic diagram of the lifting combined lighting device based on optical eye protection is shown;

[0029] Figure 5 A schematic diagram of the illumination angle of the lifting combined lighting device based on optical eye protection on the work surface;

[0030] Figure 6 A graph showing how voltage changes the beam angle of a liquid crystal lens assembly. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0035] The present application provides a lifting combined lighting device 10 based on optical eye protection, including a lifting structure 100 and a dimming structure 200, wherein the lifting structure 100 includes a fixed shell 110, a lifting roller assembly 120 and a lifting rope 130, wherein the lifting roller assembly 120 is installed in the fixed shell 110, and the lifting rope 130 is connected to the winding portion of the lifting roller assembly 120, and the lifting roller assembly 120 is used to control the lifting rope 130 to move up and down; the dimming structure 200 includes a liquid crystal lens assembly 240, a light source 230, a control panel 220 and a lamp housing 210, wherein the lamp housing 210 is connected to the lifting roller assembly 120. The lowering rope 130 is installed in the lamp housing 210, the light source 230 is installed on the control board 220, and the liquid crystal lens assembly 240 is installed on the control board 220 and covers the light source 230. The light source 230 and the liquid crystal lens assembly 240 are respectively electrically connected to the control board 220. The light source 230 is used to emit light, and the liquid crystal lens assembly 240 is used to change the beam angle of the light. The illumination of the light from the light source 230 passing through the liquid crystal lens assembly 240 is distributed as a Gaussian function, and the spot diameter of the light passing through the liquid crystal lens assembly 240 is constant.

[0036] The above-mentioned lifting and combined lighting device 10 based on optical eye protection controls the extension and retraction of the lifting rope 130 through the lifting roller assembly 120, flexibly adjusts the height of the light source 230, adapts to the illuminated work surface, and maintains a good working distance between the light source 230 and the work surface, thereby reducing glare and visual fatigue; after the light source 230 passes through the liquid crystal lens assembly 240, the illumination is distributed in a Gaussian function, so that a bright center light spot is formed on the work surface and the edge light slowly disappears, thereby suppressing the visual adjustment fatigue caused by the light and dark boundaries; during the lifting process, the beam angle of the liquid crystal lens assembly 240 is adjusted so that the illumination dynamically adapts to the influence of the position change on the light spot, thereby keeping the light spot constant, avoiding the diffusion or contraction of the light spot, and then eliminating the visual adaptation burden, and achieving precise lighting and eye protection effects through the coordination of the lifting and lowering of the lifting roller assembly 120 and the dynamic dimming of the liquid crystal lens assembly 240.

[0037] like Figures 1 to 3 As shown, it is a lifting and combined lighting device 10 based on optical eye protection according to an embodiment of the present invention, including a lifting structure 100 and a dimming structure 200. The lifting structure 100 includes a fixed shell 110, a lifting roller assembly 120 and a lifting rope 130. The lifting roller assembly 120 is installed in the fixed shell 110. The lifting rope 130 is connected to the winding part of the lifting roller assembly 120. The lifting roller assembly 120 is used to control the lifting rope 130 to lift and lower.

[0038] Furthermore, the dimming structure 200 includes a liquid crystal lens assembly 240, a light source 230, a control board 220 and a lamp housing 210. The lamp housing 210 is connected to the lifting rope 130, the control board 220 is installed in the lamp housing 210, the light source 230 is installed on the control board 220, the liquid crystal lens assembly 240 is installed on the control board 220 and covers the light source 230, the light source 230 and the liquid crystal lens assembly 240 are respectively electrically connected to the control board 220. Specifically, the light source 230 is electrically connected to the power supply end of the control board 220, and the liquid crystal lens assembly 240 is electrically connected to the liquid crystal deflection voltage control end of the control board 220. The light source 230 is used to emit light, and the liquid crystal lens assembly 240 is used to change the beam angle of the light. The illumination of the light from the light source 230 passing through the liquid crystal lens assembly 240 is distributed as a Gaussian function, and the spot diameter of the light passing through the liquid crystal lens assembly 240 is constant.

[0039] In this embodiment, the lifting roller assembly 120 drives the winding portion to retract and release the lifting cord 130, driving the lamp housing 210 to move vertically, maintaining an appropriate distance between the light source 230 and the illuminated area of ​​the work surface. This eliminates glare caused by a close distance or illumination attenuation caused by a large distance. A voltage is applied to the liquid crystal lens assembly 240 via the control board 220, altering the arrangement of the liquid crystal molecules therein and adjusting the refractive index distribution, thereby controlling the change in the angle of the illumination beam. Light from the light source 230 passes through the liquid crystal lens assembly 240, generating a Gaussian-distributed light field, resulting in a natural brightness transition. The center of the work surface is brighter, while the light at the edges of the illuminated area gradually fades. The control board 220 measures the height of the liquid crystal lens assembly 240 relative to the work surface in real time, and adjusts the beam angle of the liquid crystal lens assembly 240 using voltage to dynamically maintain a constant light spot diameter during the lifting process. During the lifting process, the power of the light source 230 can also be adjusted synchronously to compensate for the inversely proportional illumination attenuation with distance, ensuring constant illumination on the work surface.

[0040] The above-mentioned lifting and combined lighting device 10 based on optical eye protection controls the extension and retraction of the lifting rope 130 through the lifting roller assembly 120, flexibly adjusts the height of the light source 230, adapts to the illuminated work surface, and maintains a good working distance between the light source 230 and the work surface, thereby reducing glare and visual fatigue; after the light source 230 passes through the liquid crystal lens assembly 240, the illumination is distributed in a Gaussian function, so that a bright central light spot is formed on the work surface and the edge light slowly disappears, thereby suppressing the visual adjustment fatigue caused by the light and dark boundaries; during the lifting process, the beam angle of the liquid crystal lens assembly 240 is adjusted so that the illumination dynamically adapts to the influence of the lifting position change on the light spot, thereby keeping the light spot constant, avoiding the light spot from spreading or shrinking, and then eliminating the visual adaptation burden, and achieving precise lighting eye protection effect through the coordination of the lifting and lowering of the lifting roller assembly 120 and the dynamic dimming of the liquid crystal lens assembly 240.

[0041] like Figure 2 As shown, in one embodiment, the lifting structure 100 further includes a bend roller assembly 140. The bend roller assemblies 140 and the lifting ropes 130 are multiple in number. The bend roller assemblies 140 are spaced apart circumferentially around the lifting roller assembly 120. One end of the lifting rope 130 is wound around the lifting roller assembly 120, and the other end of the lifting rope 130 passes through the bend roller assembly 140 and is connected to the lamp housing 210. In this embodiment, if a single lifting rope 130 is used for traction, the lamp housing 210 is prone to tilt, causing the optical axis of the liquid crystal lens assembly 240 to form an angle with the normal of the working surface, disrupting the symmetry of the Gaussian spot and resulting in uneven edge light intensity distribution, which reduces the lighting quality. Therefore, it is necessary to perform multi-rope circumferential traction using multiple bend roller assemblies 140 and lifting ropes 130. The bend roller assemblies 140 are evenly distributed circumferentially around the lifting roller assembly 120. Through multi-rope circumferential traction, the lifting ropes 130 are evenly distributed circumferentially, and the horizontal forces of the various lifting ropes 130 offset each other. , the lamp housing 210 has no horizontal displacement or rotation tendency; by adjusting the rotation direction and speed of the lifting roller assembly 120, the lifting height of the lamp housing 210 can be accurately controlled, and the vertical force is evenly distributed to avoid tilting; multi-rope traction keeps the lamp housing 210 in a horizontal state at all times, ensuring that the optical axis of the liquid crystal lens assembly 240 coincides with the normal of the working surface, and laser ranging or image recognition technology is used to measure the distance between the lamp housing 210 and the working surface. The vertical optical axis can avoid measurement errors caused by tilt, making the height feedback value more accurate, thereby ensuring that the light spot remains constant during the lifting process.

[0042] like Figure 2As shown, in one embodiment, the lifting roller assembly 120 is provided with a plurality of arc grooves 1201 in sequence along the radial direction, and each of the redirecting roller assemblies 140 includes a fixed pulley 141 and a steering pulley 142. The fixed pulley 141 is arranged parallel to the arc groove 1201 corresponding to the lifting roller assembly 120, and a plurality of the steering pulleys 142 are arranged at intervals along the circumference of the lifting roller assembly 120, and each of the fixed pulleys 141 is arranged corresponding to a steering pulley 142. One end of the lifting rope 130 passes through the steering pulley 142 and the fixed pulley 141 in sequence and is fixed in the corresponding arc groove 1201. In this embodiment, the lifting rope 130 may slide on the surface of the lifting roller assembly 120, causing the fixed point to shift and causing an error in measuring the height of the lamp housing 210. The lifting roller assembly 120 is provided with a plurality of arc grooves 1201 radially, so that the curvature radius of each arc groove 1201 matches the diameter of the lifting rope 130, thereby forming a nested fixed structure. The arc groove 1201 accurately locates the fixed point of the lifting rope 130, and the arc surface of the arc groove 1201 limits the movement of the lifting rope 130 in a direction perpendicular to the lifting roller assembly 120. After the lifting rope 130 is firmly fixed, the vibration and noise generated by the jumping of the lifting rope 130 during the lifting process are significantly reduced, thereby improving the stability of the system operation; all the lifting ropes 130 are wound on the same lifting roller assembly 120. The lowering roller assembly 120 is driven by a single motor to rotate the lifting roller assembly 120, ensuring that the linear speed of all lifting ropes 130 is consistent. The layout of the arc groove 1201, the fixed pulley 141 and the steering pulley 142 are arranged correspondingly along the circumference of the lifting roller assembly 120. The friction loss and tension distribution of each lifting rope 130 are similar, further eliminating the speed difference; the fixed pulley 141 constrains the lifting rope 130 to move in the horizontal direction, suppresses the swing of the lifting rope 130, and reduces the risk of unbalanced loading. It is then converted into vertical traction through the steering pulley 142 to ensure that the center straight line of the liquid crystal lens assembly 240 during the lifting process is always perpendicular to the working surface, realizing multi-rope precise synchronous transmission, making the lifting process of the dimming structure 200 stable, thereby ensuring that the light spot is constant during the lifting process.

[0043] like Figure 3As shown, in one embodiment, the number of the liquid crystal lens assembly 240 and the light source 230 is multiple, and the multiple liquid crystal lens assemblies 240 are spaced apart on the control board 220, with each liquid crystal lens assembly 240 covering the corresponding light source 230. In this embodiment, the multiple light sources 230 are arranged in an array on the control board 220, and each light source 230 and the corresponding liquid crystal lens assembly 240 form an independent Gaussian light spot. The Gaussian light spots have a constant size, and the Gaussian light spots are superimposed and merged on the illuminated working surface to form a more uniform large-area illumination. When multiple light spots are superimposed, the edge area is jointly illuminated by the edge portions of multiple light spots, and the light intensity attenuation is compensated, forming a smoother transition and improving the uniformity of the illuminated working surface. By flexibly adjusting the number and layout of the light sources 230 and liquid crystal lens assemblies 240, the lighting device can be adapted to the needs of different application scenarios.

[0044] like Figure 1 and Figure 4 As shown, in one embodiment, the shape of the lamp housing 210 is a square structure; or, the lamp housing 210 is a circular structure; or, the lamp housing 210 is a special-shaped structure. In this embodiment, the shape of the lamp housing 210 is a square structure. The four sides of the square lamp housing 210 are equal in length and the angle is 90°, which is convenient for arranging the liquid crystal lens assembly 240 through an orthogonal grid. By adjusting the number of rows and columns and the spacing of the array, the arrangement boundary of the lens assembly 240 is aligned with the rectangular edge of the lamp housing 210, maximizing the use of the internal space of the lamp housing, reducing the invalid area and achieving regular coverage of the light spot; the liquid crystal lens assembly 240 is arranged along the radial and circumferential directions of the lamp housing 210 to form a concentric ring structure. By adjusting the radial spacing and the number of circumferences of the liquid crystal lens assembly 240, the liquid crystal lens assembly 240 is aligned with the rectangular edge of the lamp housing 210. The lens assembly 240 uniformly covers the circular area to avoid over-crowding in the central area or over-sparseness in the edge area. The Gaussian light spot generated by each liquid crystal lens assembly 240 is superimposed in the radial and circumferential directions. The radial spacing and circumferential number of the liquid crystal lens assembly 240 are optimized and adjusted so that the width and light intensity distribution of the annular light spot meet the uniform annular light spot requirements; special-shaped lamp shells, such as elliptical and polygonal shapes, require free-form surface arrangement, and the lamp shell contour is decomposed into key control point coordinates. The lens assembly 240 is installed at the control point, and a non-uniform grid is generated based on the control point to match the density of the lens assembly 240 with the light spot requirements.

[0045] In one embodiment, the liquid crystal lens assembly 240 includes a liquid crystal layer, a cover layer, and an electrode layer. The liquid crystal layer is sandwiched between the cover layer and the electrode layer. The cover layer is connected to the control board 220, and the cover layer is connected to the control board 220. The liquid crystal layer covers the light source 230. In this embodiment, the electrode layer voltage is adjusted to change the arrangement of liquid crystal molecules in the liquid crystal layer. Through the layered design and dynamic voltage regulation of the liquid crystal lens assembly 240, precise control of the light beam direction and adaptability to multiple scenarios are achieved.

[0046] like Figure 3 As shown, in one embodiment, the dimming structure 200 includes a light-transmitting plate 250, which is disposed below the liquid crystal lens assembly 240. In this embodiment, the light-transmitting plate 250 acts as a barrier to protect the liquid crystal lens assembly below from dust, scratches, and damage to the lamp cover. The light-transmitting plate 250 has high light transmittance, ensuring efficient use of light.

[0047] In one embodiment, the dimming structure 200 further includes a distance sensor, which is installed in the lamp housing 210 and electrically connected to the control board 220. In this embodiment, the distance sensor can be a laser distance sensor or an image distance sensor. The distance sensor collects the distance between the liquid crystal lens assembly 240 and the working surface in real time and transmits the signal to the control board 220 via a circuit.

[0048] The present application further provides a dimming system, which is applied to the lifting and combined lighting device 10 based on optical eye protection described in any of the above embodiments. The peak value I of the light from the light source 230 passing through the liquid crystal lens assembly 240 is a Gaussian function distribution, and the dimming system satisfies the following Gaussian function distribution relationship:

[0049] The illumination E of the dimming system satisfies the following relationship E1:E2=1:3, Among them, θ is the angle of the edge of the working area, c is the Gaussian width coefficient, and the beam angle θ at the edge of the working area is changed by controlling the voltage of the liquid crystal lens; E is the illumination of the dimming system, E1 is the illuminance at the center of the working surface, E2 is the illuminance at the edge of the working area, it is 2 / 3 of the maximum illumination within the working area, and 1 / 3 of the maximum illumination transition disappears outside the working area, I1 is the maximum central light intensity Imax, d1 is the vertical height from the liquid crystal lens assembly to the working surface, θ1 is the central illumination angle 0°, I2 is the light intensity at the edge of the working area, d2 is the distance from the lamp to the edge of the working area, and r is the radius of the working surface.

[0050] It can be understood that the area with illuminance greater than 2 / 3 of the maximum illuminance is the working area, and the dimming system dynamically matches the lighting area. The lighting design of the dimming system pursues uniform illumination of 2 / 3 of the maximum illuminance in the central working area within the working area with a radius of r, while retaining a soft transition 1 / 3 illuminance attenuation zone to avoid visual fatigue caused by sudden changes in light and dark, so as to optimize visual comfort and produce an optical eye protection effect.

[0051] It can be understood that the liquid crystal lens assembly uses voltage control to adjust the refractive index, thereby adjusting the angle of the light beam; when the lifting mechanism adjusts the vertical height of the liquid crystal lens assembly to the working surface or the user changes the size of the working surface, the height change causes the light spot to shift. In order to prevent the light spot distribution of the illumination area radius r on the working surface from changing with the vertical height from the liquid crystal lens assembly to the working surface, a closed-loop system is formed by dynamically adjusting the Gaussian coefficient c and controlling the voltage of the liquid crystal lens assembly. When the ranging sensor measures the real-time height of the liquid crystal lens assembly to the working surface and transmits it to the control board to calculate the light beam angle θ at the edge of the working area, the required Gaussian width coefficient c is inversely deduced, and the liquid crystal lens voltage is adjusted to change the Gaussian width coefficient c, so that the Gaussian beam shape of the light passing through the liquid crystal lens assembly adapts to the lifting position change in real time, and ultimately the light spot remains constant during the lifting process.

[0052] In the above-mentioned dimming system, the illuminance of the light source of the dimming system after passing through the liquid crystal lens assembly is distributed as a Gaussian function, so that the light is irradiated on the working surface to form a light spot with a bright center, and the edge of the light spot has a slowly changing illuminance Gaussian distribution, which avoids visual fatigue caused by sudden changes in light and dark and produces an optical eye protection effect; the dimming system dynamically adjusts the angle θ and the Gaussian width coefficient c of the edge of the working area through voltage to achieve real-time matching of the light spot shape with the working surface, thereby achieving an eye-protection lighting effect with a constant light spot shape, optimized illuminance uniformity and suppressed visual fatigue.

[0053] In one embodiment, the dimming system also satisfies the following relationship: the central light intensity Light intensity I in the working area a =Imax / 2, the central light intensity Imax=e (0) =1, a=-4*ln(0.5) * c 2 Wherein, the half-intensity angle a is a, and the center angle is 0. In this embodiment, the half-intensity angle a is an important indicator of the beam width. By controlling the voltage of the liquid crystal lens assembly, the Gaussian width coefficient c can be changed, thereby changing the half-intensity angle a. Specifically, when the Gaussian width coefficient c decreases, the half-intensity angle a becomes smaller, the energy of the illumination becomes more concentrated, and the beam becomes narrower. When the Gaussian width coefficient c increases, the half-intensity angle a becomes larger, the energy of the illumination becomes more dispersed, and the beam becomes wider. By associating the half-intensity angle a with the Gaussian width coefficient c, adjusting the Gaussian width coefficient c can directly control the half-intensity angle a, thereby precisely regulating the divergence characteristics of the beam.

[0054] Furthermore, in one embodiment, In this embodiment, the beam angle θ at the edge of the working area is defined as the eye-protection illumination boundary, satisfying E2 / E1=1 / 3E2 to ensure the uniformity of illumination in the working area; the half-intensity angle a is the position where the light intensity decays to 50%, controlling the energy distribution shape; the Gaussian width coefficient c serves as the core hub to regulate the half-intensity angle a and the beam angle θ at the edge of the working area. The beam angle θ at the edge of the working area locks the working area to be free of visual fatigue. The half-intensity angle a controls the smooth attenuation of energy in the transition zone to suppress ambient glare. The eye-protection boundary of the beam angle θ at the edge of the working area and the energy distribution of the half-intensity angle a are coordinated to achieve the dual eye-protection goals of fatigue-free working area and glare-free environment.

[0055] In one embodiment, the range of the beam angle θ at the edge of the illuminated working area controlled by the liquid crystal lens assembly is 0°-55°. In this embodiment, when the beam angle θ at the edge of the working area is close to 0°, the light beam is highly concentrated. When the beam angle θ at the edge of the illuminated working area is greater than 55°, it exceeds the maximum deflection capacity of the liquid crystal molecules. When the deflection angle is too large, it can easily cause the voltage of the liquid crystal lens assembly to overload. Moreover, stray light with a beam angle θ exceeding 55° at the edge of the illuminated working area can easily enter the human eye and cause glare. The range of the beam angle θ at the edge of the illuminated working area is 0°-55°, which ensures that Gaussian illumination still meets a 1:3 illumination ratio in the maximum working area, eliminates the risk of glare outside 55° at the edge of the illuminated working area, and keeps the voltage of the liquid crystal lens assembly within a safe low voltage range.

[0056] In one embodiment, the operating voltage of the liquid crystal lens assembly 240 is 0V-20V. In this embodiment, the beam angle θ at the edge of the working area of ​​the liquid crystal lens assembly 240 that controls illumination increases with increasing operating voltage. When the operating voltage is 0V-4V, the liquid crystal molecules are not fully aligned, and the refractive index changes slowly, making the beam angle θ at the edge of the working area approximately constant. When the operating voltage is 4V-16V, the liquid crystal molecules are rapidly aligned, and the refractive index increases rapidly. When the operating voltage is 16V-20V, the liquid crystal molecules are saturated, and the refractive index changes slowly, resulting in a slower increase in the beam angle θ at the edge of the working area. By driving the liquid crystal lens assembly 240 with a voltage in the range of 0V-20V, dynamic and precise control of the beam angle θ at the edge of the working area is achieved.

[0057] In one embodiment, the height d1 of the liquid crystal lens assembly from the working surface ranges from 0.8m to 2.3m. In this embodiment, when the height of the liquid crystal lens assembly from the working surface is less than 0.8m, the light is easily over-focused, the central illumination is too high, and it is easy to cause visual fatigue. When the height of the liquid crystal lens assembly from the working surface is greater than 2.3m, the light is easily over-diverged, the edge illumination is insufficient, and the visual contrast is reduced. By limiting θ to 0°-55° and combining it with dynamic detection of the height d1, the dimming system can automatically adjust the Gaussian coefficient c to maintain a constant light spot geometry, ensuring that the Gaussian illumination still meets the 1:3 illumination ratio and light uniformity within the maximum working area, and the light spot size remains consistent during the raising and lowering process.

[0058] Compared with the prior art, the present disclosure has at least the following advantages:

[0059] The above-mentioned lifting combined lighting device based on optical eye protection controls the extension and retraction of the lifting rope through the lifting roller assembly, flexibly adjusts the height of the light source, adapts to the illuminated work surface, and maintains a good working distance between the light source and the work surface, thereby reducing glare and visual fatigue; after the light source passes through the liquid crystal lens assembly, the illumination is distributed in a Gaussian function, so that a bright central light spot is formed on the work surface and the edge light slowly disappears, thereby suppressing the visual adjustment fatigue caused by the light and dark boundaries; during the lifting process, the beam angle of the liquid crystal lens assembly is adjusted so that the light dynamically adapts to the influence of the lifting position change on the light spot, thereby keeping the light spot constant and avoiding the diffusion or contraction of the light spot, thereby eliminating the visual adaptation burden, and realizing precise lighting eye protection through the coordination of the lifting and lowering of the lifting roller assembly and the dynamic dimming of the liquid crystal lens assembly.

[0060] The illuminance of the light source of the dimming system after passing through the liquid crystal lens assembly is distributed as a Gaussian function, so that the light is irradiated on the working surface to form a light spot with a bright center and a slowly changing Gaussian distribution of illuminance at the edge of the light spot, avoiding visual fatigue caused by sudden changes in light and dark, and producing an optical eye protection effect; the dimming system dynamically adjusts the angle θ and Gaussian width coefficient c of the edge of the working area through voltage to achieve real-time matching of the light spot shape with the working surface, achieving an eye-protection lighting effect with a constant light spot shape, optimized illuminance uniformity and suppressed visual fatigue.

[0061] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A lifting combined lighting device based on optical eye protection, characterized in that: Including lifting structure and dimming structure, The lifting structure includes a fixed shell, a lifting roller assembly and a lifting rope, wherein the lifting roller assembly is installed in the fixed shell, the lifting rope is wound around the winding portion of the lifting roller assembly, and the lifting roller assembly is used to wind and lift the lifting rope; The dimming structure includes a lamp housing, a control panel, a light source and a liquid crystal lens assembly. The lamp housing is connected to the lifting rope, the control panel is installed in the lamp housing, the light source is installed on the control panel, the liquid crystal lens assembly is installed on the control panel and covers the light source, the light source and the liquid crystal lens assembly are electrically connected to the control panel, respectively. The light source is used to emit light, and the liquid crystal lens assembly is used to change the beam angle of the light. The illumination of the light from the light source passing through the liquid crystal lens assembly is distributed as a Gaussian function, and the spot diameter of the light passing through the liquid crystal lens assembly is constant.

2. The lifting combined lighting device based on optical eye protection according to claim 1 is characterized in that: The lifting structure also includes a redirecting roller assembly. There are multiple redirecting roller assemblies and lifting ropes. The redirecting roller assemblies are arranged at intervals along the circumference of the lifting roller assembly. One end of the lifting rope is wound around the lifting roller assembly, and the other end of the lifting rope passes through the redirecting roller assembly and is connected to the lamp housing.

3. The lifting combined lighting device based on optical eye protection according to claim 2 is characterized in that: The lifting roller assembly is provided with a plurality of arc grooves in sequence along the radial direction. Each of the redirecting roller assemblies includes a fixed pulley and a steering pulley. The fixed pulley is arranged in parallel with the arc groove corresponding to the lifting roller assembly. The plurality of steering pulleys are arranged at intervals along the circumference of the lifting roller assembly. Each fixed pulley is arranged corresponding to a steering pulley. One end of the lifting rope passes through the steering pulley and the fixed pulley in sequence and is fixed in the corresponding arc groove.

4. The lifting combined lighting device based on optical eye protection according to claim 1 is characterized in that: There are multiple liquid crystal lens components and multiple light sources. Multiple liquid crystal lens components are spaced apart on the control board, and each liquid crystal lens component covers the corresponding light source.

5. The lifting combined lighting device based on optical eye protection according to claim 1 is characterized in that: The shape of the lamp housing is a square structure; or, the lamp housing is a circular structure; or, the lamp housing is a special-shaped structure.

6. The lifting combined lighting device based on optical eye protection according to claim 1 is characterized in that: The dimming structure includes a light-transmitting plate, and the light-transmitting plate is arranged below the liquid crystal lens assembly.

7. A dimming system, characterized in that: In the optical eye protection lifting combined lighting device according to any one of claims 1 to 6, the peak value I of the light from the light source passing through the liquid crystal lens assembly is a Gaussian function distribution, and the dimming system satisfies the following Gaussian function distribution relationship: The illumination E of the dimming system satisfies the following relationship: E1:E2=1:3, Among them, θ is the angle of the edge of the working area, c is the Gaussian width coefficient, and the beam angle θ is changed by controlling the voltage of the liquid crystal lens; E is the illumination of the dimming system, E1 is the illumination at the center of the working surface, E2 is the illumination at the edge of the working area, it is 2 / 3 of the maximum illumination within the working area, and 1 / 3 of the maximum illumination transition disappears outside the working area, I1 is the maximum light intensity Imax, d1 is the vertical height from the liquid crystal lens assembly to the working surface, θ1 is the central illumination angle 0°, I2 is the light intensity at the edge of the working area, d2 is the distance from the liquid crystal lens assembly to the edge of the working area, and r is the radius of the working surface.

8. The dimming system according to claim 7, characterized in that: The dimming system also satisfies the following relationship: Light intensity I in the working area a =Imax / 2, the central light intensity Imax=e (0) =1, a=-4*ln(0.5) * c 2 ; Among them, the half-intensity angle is a and the center angle is 0.

9. The dimming system according to claim 7, wherein: The beam angle θ at the edge of the working area is in the range of 0°-55°.

10. The dimming system according to claim 9, characterized in that: The vertical height d1 from the liquid crystal lens assembly to the working surface ranges from 0.8m to 2.3m.

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