Lighting device with adjustable optical axis and optical axis adjusting method thereof

Abstract

The invention discloses a lighting device with an adjustable optical axis and an optical axis adjusting method thereof. The lighting device comprises a light source module and a lens array which are arranged in parallel. The control module is used for receiving the position information of at least one local lighting area acquired by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and controlling the optical axis of at least part of the lens units to face the local lighting area according to the position information. And the light emitted by at least part of the lens units is concentrated in the local illumination area. Or when the mode determining module determines that the adjusting mode of the lighting device is the second mode, the light emitted by the light source module is uniformly emitted after passing through the lens array. Thus, the light beam transmission direction and the concentration degree are changed by controlling the optical axis direction of the lens unit, local illumination in the first mode and overall illumination in the second mode are achieved, and therefore the different illumination requirements of the overall area and the local area of indoor illumination are met.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of lighting, and in particular to a lighting device with adjustable optical axis and an optical axis adjustment method thereof. Background Art

[0002] The existing lamp design usually selects different types of lamps for different application scenarios. For example, you may need to purchase multiple types of lamps in one environment. Reading, working, playing, etc. require high local illumination of the relevant lamps, but not much illumination area, so corresponding types of lamps are needed; the main lamp meets the basic needs of walking and environmental observation, with relatively low contrast requirements and relatively large illumination area requirements, which requires another type of lamp. In addition, you need to purchase lamps with corresponding requirements separately to meet the use requirements of different application scenarios, which reduces the user experience. Summary of the invention

[0003] The present invention provides a lighting device with adjustable optical axis and an optical axis adjustment method thereof, which changes the transmission direction and concentration of a light beam by controlling the optical axis direction of a lens unit, thereby realizing local lighting in a first mode and overall lighting in a second mode, thereby meeting different illumination requirements for the overall area and local area of ​​indoor lighting.

[0004] In a first aspect, an embodiment of the present invention provides a lighting device with an adjustable optical axis, comprising:

[0005] The lighting device comprises a light source module and a lens array arranged in parallel, wherein the lens array is located on the light output path of the light source module;

[0006] The lens array comprises a plurality of lens units;

[0007] The lighting device further comprises a position information determination module, a mode determination module and a control module, wherein the control module is electrically connected to the position information determination module, the mode determination module and the lens array respectively, wherein the mode determination module comprises a first mode and a second mode;

[0008] The control module is used for receiving the position information of at least one local lighting area acquired by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and controlling the optical axis of at least part of the lens unit to be directed toward the local lighting area according to the position information, so that the light emitted through at least part of the lens unit is concentrated in the local lighting area;

[0009] Or it is used to make the light emitted by the light source module be emitted uniformly after passing through the lens array when the mode determination module determines that the adjustment mode of the lighting device is the second mode.

[0010] Optionally, the light source module includes a plurality of point light sources;

[0011] The arrangement direction of the point light sources is the same as the arrangement direction of the lens units, and the point light sources and the lens units are arranged in a one-to-one correspondence.

[0012] Optionally, the lens unit includes a liquid lens;

[0013] The liquid lens comprises a cavity, a first electrode and a second electrode;

[0014] The first electrode is located at the bottom of the cavity, the second electrode includes a plurality of second sub-electrodes, the plurality of second sub-electrodes surround the side wall of the cavity, and an insulating layer is provided between the second sub-electrodes and the side wall;

[0015] The cavity is filled with a first liquid and a second liquid, the first liquid and the second liquid are immiscible with each other and have different electrical conductivity and refractive index;

[0016] The first liquid is in contact with the first electrode.

[0017] Optionally, the first liquid includes a conductive liquid, and the second liquid includes an insulating liquid.

[0018] Optionally, a distance D between the light source module and the lens array satisfies: L / 2≤D≤L;

[0019] Wherein, L is the focal length of the lens unit.

[0020] In a second aspect, an embodiment of the present invention further provides an optical axis adjustment method for an optical axis adjustable lighting device, which is applied to any of the optical axis adjustable lighting devices described in the first aspect, and the optical axis adjustment method includes:

[0021] determining an adjustment mode of the lighting device;

[0022] When it is determined that the adjustment mode is the first mode, obtaining position information of at least one local illumination area, and controlling the optical axes of at least part of the lens units to be oriented toward the local illumination area according to the position information, so that the light emitted through at least part of the lens units is concentrated in the local illumination area;

[0023] When the adjustment mode is determined to be the second mode, the light emitted by the light source module is made to be emitted evenly after passing through the lens array.

[0024] Optionally, the lens unit includes a liquid lens;

[0025] The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes;

[0026] The cavity is filled with a first liquid and a second liquid, and the position information includes position information of a local illumination area;

[0027] The controlling the optical axis of at least part of the lens unit to be directed toward the local illumination area according to the position information comprises:

[0028] Determine voltage information of the first electrode and the plurality of second sub-electrodes of at least part of the lens units according to the position information;

[0029] According to the voltage information of different lens units, a voltage is applied to the corresponding lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding lens unit so that the inclination direction of the contact surface is toward the local illumination area, wherein the inclination degrees of the contact surfaces of different lens units are different.

[0030] Optionally, the lens unit includes a liquid lens;

[0031] The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes;

[0032] The cavity is filled with a first liquid and a second liquid;

[0033] The local lighting area includes a first local lighting area and a second local lighting area;

[0034] The controlling the optical axis of at least part of the lens unit to be directed toward the local illumination area according to the position information comprises:

[0035] Determine voltage information of a first electrode and a second sub-electrode of a first lens unit close to the first position information according to the first position information of the first local illumination area;

[0036] Applying voltage to the corresponding first lens unit according to voltage information of different first lens units, changing the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding first lens unit, so that the inclination direction of the contact surface in the first lens unit is toward the first local illumination area, and the inclination degrees of the contact surfaces of different first lens units are different;

[0037] Determining voltage information of a first electrode and a second sub-electrode of a second lens unit close to the second position information according to the second position information of the second local illumination area;

[0038] According to the voltage information of different second lens units, a voltage is applied to the corresponding second lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding second lens unit, so that the inclination direction of the contact surface in the second lens unit is toward the second local illumination area, and the inclination degrees of the contact surfaces of different second lens units are different.

[0039] Optionally, when determining that the adjustment mode is the second mode, making the light emitted by the light source module uniformly emitted after passing through the lens array includes:

[0040] When the adjustment mode is determined to be the second mode, the optical axis of each lens unit is controlled to be parallel to the central axis of the lens, so that the light emitted by the light source module is emitted evenly after passing through the lens array.

[0041] Optionally, the lens unit includes a liquid lens;

[0042] The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes;

[0043] The cavity is filled with a first liquid and a second liquid;

[0044] The controlling the optical axis of each lens unit to be parallel to the central axis of the lens comprises:

[0045] No voltage is applied to the first electrode and the plurality of second sub-electrodes of each lens unit, so that the contact surface between the first liquid and the second liquid is a plane, so that the light emitted by the light source module is emitted uniformly after passing through the lens array.

[0046] The embodiment of the present invention provides an optical axis adjustable lighting device, which includes a light source module and a lens array arranged in parallel. The lens array is located on the light output path of the light source module, and the lens array includes a plurality of lens units. The lighting device also includes a position information determination module, a mode determination module and a control module, and the control module is electrically connected to the position information determination module, the mode determination module and the lens array respectively. Among them, the mode determination module includes a first mode and a second mode. The control module is used to receive the position information of at least one local lighting area obtained by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and control the optical axis of at least part of the lens unit toward the local lighting area according to the position information, so that the light emitted by at least part of the lens unit is concentrated in the local lighting area. Or when the mode determination module determines that the adjustment mode of the lighting device is the second mode, the light emitted by the light source module is uniformly emitted after passing through the lens array. In this way, by controlling the optical axis direction of the lens unit to change the light beam transmission direction and concentration degree, local lighting in the first mode and overall lighting in the second mode are achieved, thereby meeting the different illumination requirements of the overall area and the local area of ​​indoor lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of light emission of a lighting device in a first mode provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of light emission of a lighting device in a second mode provided by an embodiment of the present invention;.

[0049] Figure 3 is an enlarged schematic diagram of a lens unit provided by an embodiment of the present invention;

[0050] Figure 4 is a schematic top view of a lens unit provided by an embodiment of the present invention;

[0051] Figure 5 is a schematic flow chart of an optical axis adjustment method for an illumination device provided by an embodiment of the present invention;

[0052] Figure 6 It is a flow chart of another optical axis adjustment method of an illumination device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0055] Figure 1 is a schematic diagram of light emission of a lighting device in a first mode provided by an embodiment of the present invention, Figure 2 FIG. 1 is a schematic diagram of light emission of another lighting device in a second mode provided by an embodiment of the present invention. Figure 1 and Figure 2 , the lighting device includes a light source module 10 and a lens array 20 arranged in parallel. The lens array 20 is located on the light output path of the light source module 10. The lens array 20 includes a plurality of lens units 210. The lighting device also includes a position information determination module (not shown in the figure), a mode determination module (not shown in the figure) and a control module (not shown in the figure). The control module is electrically connected to the position information determination module, the mode determination module and the lens array 20 respectively, wherein the mode determination module includes a first mode and a second mode. The control module is used to receive the position information of at least one local lighting area S1 obtained by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and control the optical axis of at least part of the lens unit 210 to face the local lighting area S1 according to the position information, so that the light emitted by at least part of the lens unit 210 is concentrated in the local lighting area S1. Or it is used to make the light emitted by the light source module 10 uniformly emitted after passing through the lens array 20 when the mode determination module determines that the adjustment mode of the lighting device is the second mode.

[0056] Specifically, the lens array 20 is arranged on the light output path of the light source module 10 so that the light emitted by the light source module 10 changes the projection direction of the light beam through the lens array 20. Exemplarily, the lighting device includes a mode selection module, and the module selection module is used to select the working mode of the lighting device. The working modes of the lighting device include a first mode and a second mode. Among them, the first mode is a mode that requires a high local illumination in a specific area such as reading, working or playing. Furthermore, in the first mode, more light is required to illuminate a specific area (a local lighting area S1 such as reading, working or playing). For this reason, when determining that the working mode of the lighting device is the first mode, the position information of at least one local lighting area S1 is first determined by a position information determination module. The position information determination module can be a position scanning device such as a radar or a laser, and then the coordinate information of the local lighting area S1 in the house is obtained by the position information determination module, so as to determine the relative position information between the local lighting area S1 and the lighting device. The lighting device further includes a control module, which is electrically connected to the position information determination module and the plurality of lens units 210 in the lens array 20, respectively. After receiving the position information of at least one local lighting area S1, the control module controls the optical axis of at least part of the lens units 210 to be directed toward the local lighting area S1 according to the relative position information between the local lighting area S1 and the lighting device. Figure 1 In the illustrated embodiment, the direction pointed by the red arrow is the tilt direction (toward direction) of the optical axis, wherein the tilt direction of the optical axis is the transmission direction of the light beam. It is understandable that, due to the different relative positional relationships between different lens units 210 and the local illumination area S1, the tilt directions of the optical axes of different lens units 210 are different. The optical axis of at least some of the lens units 210 is oriented toward the local illumination area S1, thereby concentrating the light in the local illumination area S1 and improving the illumination of the local illumination area S1, thereby meeting the requirements for high illumination in a specific area such as reading, working or playing.

[0057] It should be noted that the above embodiment is exemplarily described by taking a local lighting area S1 as an example, but it is not limited to this. In other embodiments, multiple local lighting areas may also be included. Exemplarily, the multiple local designated areas S1 may include a first local lighting area S11 and a second local lighting area S12. In the first mode, the control module determines the first position information of the first local lighting area S11 and the second position information of the second local lighting area S12 respectively through the position information determination module. Afterwards, the control module controls the inclination direction of the optical axis of the first lens unit close to the first position information toward the first local lighting area S11 according to the first position information, and controls the inclination direction of the optical axis of the second lens unit close to the second position information toward the second local lighting area S12 according to the second position information, so that the illumination of the first local lighting area S11 and the second local lighting area S12 are respectively achieved to be higher.

[0058] In addition, the second mode is a mode that meets basic requirements such as walking or environmental observation, and the illumination requirement is relatively low at this time. When the working mode of the lighting device is determined to be the second mode, the control device controls the optical axis of each lens unit 210 to be parallel to the central axis of the lens unit 210 itself, so that the light emitted by the light source module 10 is uniformly emitted after passing through the lens array 20, thereby ensuring that the illumination of the light emitted by the lighting device is uniform as a whole. In this way, by controlling the optical axis direction of the lens unit to change the transmission direction and concentration of the light beam, local illumination in the first mode and overall illumination in the second mode are achieved, thereby meeting the different illumination requirements of the overall area and local area of ​​indoor lighting.

[0059] In summary, an embodiment of the present invention provides an optical axis adjustable lighting device, which includes a light source module and a lens array arranged in parallel. The lens array is located on the light output path of the light source module, and the lens array includes a plurality of lens units. The lighting device also includes a position information determination module, a mode determination module and a control module, and the control module is electrically connected to the position information determination module, the mode determination module and the lens array respectively. Among them, the mode determination module includes a first mode and a second mode. The control module is used to receive the position information of at least one local lighting area acquired by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and control the optical axis of at least part of the lens unit toward the local lighting area according to the position information, so that the light emitted by at least part of the lens unit is concentrated in the local lighting area. Or when the mode determination module determines that the adjustment mode of the lighting device is the second mode, the light emitted by the light source module is uniformly emitted after passing through the lens array. In this way, by controlling the optical axis direction of the lens unit to change the light beam transmission direction and concentration degree, local lighting in the first mode and overall lighting in the second mode are achieved, thereby meeting the different illumination requirements of the overall area and the local area of ​​indoor lighting.

[0060] Optionally, based on the above embodiment, continue to refer to Figure 1 and Figure 2 The light source module 10 includes a plurality of point light sources (not shown in the figure). The arrangement direction of the point light sources is the same as the arrangement direction of the lens units 210, and the point light sources and the lens units are arranged in a one-to-one correspondence.

[0061] Specifically, the point light source can be an LED lamp, an incandescent lamp, a tungsten lamp or a fluorescent lamp, etc., and the embodiment of the present invention does not limit the specific type of the point light source. In addition, the arrangement order of the point light sources can be an array arrangement, for example, the arrangement shape of the point light sources can be circular or square, etc. It can be understood that the arrangement direction of the lens unit 210 is the same as the arrangement direction of the point light sources, and they correspond one to one. Exemplarily, if the arrangement shape of the point light sources is circular, the arrangement shape of the lens unit 210 should also be circular, and the circular shape of the point light source is the same as the circular shape of the lens unit 210, and corresponds to each other, so as to ensure that each point light source has a corresponding lens unit 210 to change the light output direction. It should be noted that the embodiment of the present invention does not limit the number of point light sources and lens units 210, as long as the point light sources and lens units correspond one to one.

[0062] Optionally, based on the above embodiment, Figure 3 is an enlarged schematic diagram of a lens unit provided by an embodiment of the present invention, Figure 4 is a schematic top view of a lens unit provided by an embodiment of the present invention. Figure 3 and Figure 4 , the lens unit 210 includes a liquid lens. The liquid lens includes a cavity (not shown in the figure), a first electrode 211 and a second electrode 212. The first electrode 211 is located at the bottom of the cavity, and the second electrode 212 includes a plurality of second sub-electrodes 2121, and the plurality of second sub-electrodes 2121 surround the side wall of the cavity, and an insulating layer 213 is provided between the second sub-electrodes 2121 and the side wall. The cavity is filled with a first liquid 214 and a second liquid 215, which are immiscible with each other and have different electrical conductivity and refractive index, and the first liquid 214 is in contact with the first electrode 211.

[0063] For example, Figure 3 and Figure 4As shown, the cavity of the liquid lens is filled with a first liquid 214 and a second liquid 215. The first liquid 214 may be a conductive liquid, and the second liquid may be an insulating liquid. In addition, the first liquid 214 and the second liquid 215 are different from each other and have different refractive indices. Thus, when a voltage is applied to the first electrode 211 and a plurality of second sub-electrodes 2121 so that the voltage between the first electrode 211 and each second sub-electrode 2121 is differentiated, the inclination of the contact surface formed by the first liquid 214 and the second liquid 215 changes, wherein the inclination of the contact surface represents the corresponding degree of adjustment of the optical axis, thereby achieving the adjustment of the optical axis. Then, as shown in FIG. Figure 1 As shown, when it is determined that the working mode of the lighting device is the first mode, the position information of the local lighting area S1 is obtained through the position information determination module, and then the voltage information of the first electrode 211 and the voltage information of the multiple second sub-electrodes 2121 of at least part of the lens units 210 (for example, the lens unit 210 close to the local lighting area S1) are determined according to the position information. It should be noted that the obtained voltage information of the first electrode 211 and the voltage information of the second sub-electrode 2121 need to satisfy that after the voltage is applied to the corresponding lens unit 210, the inclination direction of the contact surface of the corresponding lens unit 210 is toward the local lighting area S1 (that is, the optical axis of the corresponding lens unit 210 is toward the local lighting area). It can be understood that since the lens unit 210 close to the local lighting area S1 is at a different position from the local lighting area S1, the voltage information of the first electrode 211 and the multiple second sub-electrodes 2121 of different lens units 210 are all different, so that the inclination degree of the contact surface of different lens units 210 is all different. Specifically, as Figure 1 As shown, Figure 1 The red arrow in the middle indicates the direction of the optical axis (the inclination direction of the contact surface between the first liquid 214 and the second liquid 215). The optical axis directions of different lens units 210 are different and all point to the local lighting area S1, so that the light emitted by the light source module 10 is concentrated to the local lighting area S1 after being adjusted by the lens unit 210 to improve the illumination of the local lighting area S1.

[0064] In addition, if Figure 2 As shown, when the mode of the lighting device is determined to be the second mode, no voltage is applied to the first electrode 211 and the second sub-electrode 2121 of each lens unit 210. At this time, the interface between the first liquid 214 and the second liquid 215 in the lens unit 210 is a plane. Figure 2 At this time, the lens unit 210 is equivalent to a plane lens, and the light emitted by the light source module 10 is evenly emitted after passing through the lens unit 210, thereby ensuring that the illumination of the light emitted by the lighting device is uniform as a whole, meeting the basic requirements of providing walking or environmental observation in the second mode.

[0065] Optionally, based on the above embodiment, continue to refer to Figure 1 , the distance D between the light source module 10 and the lens array 20 satisfies: L / 2≤D≤L, where L is the focal length of the lens unit 210. Specifically, the distance D between the light source module 10 and the lens array 20 satisfies L / 2≤D≤L, which can make the energy of the light emitted by the light source module 10 higher after passing through the lens unit 20, ensuring that the illumination of the local lighting area is higher in the first mode.

[0066] Based on the same inventive concept, an embodiment of the present invention further provides a method for adjusting the optical axis of an illumination device with an adjustable optical axis. Figure 5 is a flow chart of a method for adjusting the optical axis of an illumination device provided by an embodiment of the present invention, see Figure 5 , the optical axis adjustment method comprises:

[0067] S110: Determine an adjustment mode of the lighting device.

[0068] Specifically, the working mode of the lighting device can be determined by the mode selection module. The working modes of the lighting device include a first mode and a second mode. The first mode is a mode that requires a high local illumination in a specific area for reading, working or playing. The second mode is a mode that meets basic requirements such as walking or environmental observation, and the illumination requirement is relatively low.

[0069] S120. When it is determined that the adjustment mode is the first mode, obtain position information of at least one local illumination area, and control the optical axes of at least part of the lens units to be oriented toward the local illumination area according to the position information.

[0070] Since the first mode is a mode for reading, working or playing, etc., which requires a high local illumination of a specific area, when determining that the working mode of the lighting device is the first mode, the position information of at least one local illumination area is first determined by the position information determination module. The position information determination module can be a position scanning device such as a radar or a laser, and the coordinate information of the local illumination area in the house is obtained by the position information determination module, so as to determine the relative position information between the local illumination area and the lighting device. The lighting device also includes a control module, which is electrically connected to the position information determination module and a plurality of lens units in the lens array, respectively, and after receiving the position information of at least one local illumination area, the control module controls the optical axis of at least some of the lens units to face the local illumination area according to the relative position information between the local illumination area and the lighting device. Among them, the inclination direction of the optical axis is the transmission direction of the light beam. It can be understood that, since the relative position relationship between different lens units and the local illumination area is different, the inclination direction of the optical axis of different lens units is different. The optical axis of at least some of the lens units is axially directed to the local illumination area, so that the light is concentrated in the local illumination area, and the illumination of the local illumination area is improved, thereby meeting the situation where the illumination of a specific area is required to be high for reading, working or playing.

[0071] S130: When it is determined that the adjustment mode is the second mode, the light emitted by the light source module is uniformly emitted after passing through the lens array.

[0072] The second mode is a mode that meets basic requirements such as walking or environmental observation, and the illumination requirement is relatively low at this time. When the working mode of the lighting device is determined to be the second mode, the control device controls the optical axis of each lens unit to be parallel to the central axis of the lens unit itself, so that the light emitted by the light source module is uniformly emitted after passing through the lens array, thereby ensuring that the illumination of the light emitted by the lighting device is uniform as a whole. In this way, by controlling the optical axis direction of the lens unit to change the transmission direction and concentration of the light beam, local illumination in the first mode and overall illumination in the second mode are achieved, thereby meeting the different illumination requirements of the overall area and local area of ​​indoor lighting.

[0073] In summary, the embodiments of the present invention determine the adjustment mode of the lighting device. When the adjustment mode is determined to be the first mode, the position information of at least one local lighting area is obtained, and the optical axis of at least part of the lens unit is controlled to be directed toward the local lighting area according to the position information, so that the light emitted through at least part of the lens unit is concentrated in the local lighting area. When the adjustment mode is determined to be the second mode, the light emitted by the light source module is uniformly emitted after passing through the lens array. In this way, the transmission direction and concentration of the light beam are changed by controlling the direction of the optical axis of the lens unit, so as to achieve local lighting in the first mode and overall lighting in the second mode, thereby meeting the different illumination requirements of the overall area and local area of ​​indoor lighting.

[0074] Optional, Figure 6 FIG. 1 is a flow chart of another method for adjusting the optical axis of an illumination device provided by an embodiment of the present invention. Figure 6 , the optical axis adjustment method comprises:

[0075] S210: Determine an adjustment mode of the lighting device.

[0076] S220. Determine voltage information of the first electrode and multiple second sub-electrodes of at least part of the lens unit based on the position information, and apply voltage to the corresponding lens unit based on the voltage information of different lens units to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding lens unit so that the inclination direction of the contact surface is toward the local illumination area.

[0077] Specifically, when determining that the working mode of the lighting device is the first mode, the position information of the local lighting area is obtained through the position information determination module, and then the voltage information of the first electrode and the voltage information of multiple second sub-electrodes of at least part of the lens units (for example, the lens unit close to the local lighting area) are determined according to the position information. It should be noted that the obtained voltage information of the first electrode and the voltage information of the second sub-electrode need to satisfy that after the voltage is applied to the corresponding lens unit, the inclination direction of the contact surface of the corresponding lens unit is toward the local lighting area (that is, the optical axis of the corresponding lens unit is toward the local lighting area). It can be understood that since the lens units close to the local lighting area are located at different positions from the local lighting area, the voltage information of the first electrode and the multiple second sub-electrodes of different lens units are all different, so that the inclination degrees of the contact surfaces of different lens units are all different. Specifically, as Figure 1 As shown, Figure 1 The red arrow in the middle indicates the direction of the optical axis (the inclination direction of the contact surface between the first liquid and the second liquid). The optical axis directions of different lens units are different, and all point to the local illumination area, so that the light emitted by the light source module is concentrated on the local illumination area after being adjusted by the lens unit to improve the illumination of the local illumination area.

[0078] It can be understood that when multiple local lighting areas are included, such as the local lighting area includes a first local lighting area and a second local lighting area. The voltage information of the first electrode and the second sub-electrode of the first lens unit close to the first position information can be determined according to the first position information of the first local lighting area, and then according to the voltage information of different first lens units, a voltage is applied to the corresponding first lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding first lens unit, so that the inclination direction of the contact surface in the first lens unit is toward the first local lighting area. Similarly, the voltage information of the first electrode and the second sub-electrode of the second lens unit close to the second position information is determined according to the second position information of the second local lighting area, and according to the voltage information of different second lens units, a voltage is applied to the corresponding second lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding second lens unit, so that the inclination direction of the contact surface in the second lens unit is toward the second local lighting area, and the inclination degrees of the contact surfaces of different second lens units are different. Thereby, the effect of grouping limited light and distributing it to multiple local areas in the room is achieved.

[0079] S230: When it is determined that the adjustment mode is the second mode, control the optical axis of each lens unit to be parallel to the central axis of the lens unit.

[0080] Specifically, when the mode of the lighting device is determined to be the second mode, no voltage is applied to the first electrode and the second sub-electrode of each lens unit. At this time, the interface between the first liquid and the second liquid in the lens unit is a plane. Figure 2 At this time, the lens unit is equivalent to a plane lens, and the light emitted by the light source module is emitted evenly after passing through the lens unit, thereby ensuring that the illumination of the light emitted by the lighting device is uniform as a whole, meeting the basic requirements of walking or environmental observation in the second mode.

[0081] In summary, the embodiment of the present invention adjusts the light emission direction by adjusting the optical axis of the liquid lens. In the first mode, the voltage information of the first electrode and multiple second sub-electrodes of at least part of the lens unit is determined according to the position information. According to the voltage information of different lens units, voltage is applied to the corresponding lens unit to change the inclination degree of the contact surface formed by the first liquid and the second liquid in the corresponding lens unit, so that the inclination direction of the contact surface is toward the local illumination area. In the second mode, the optical axis of each lens unit is controlled to be parallel to the central axis of the lens unit. In this way, local illumination in the first mode and overall illumination in the second mode are achieved, so as to meet the different illumination requirements of the overall area and the local area of ​​indoor lighting.

[0082] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A lighting device with adjustable optical axis, characterized in that: The lighting device comprises a light source module and a lens array arranged in parallel, wherein the lens array is located on the light output path of the light source module; The lens array comprises a plurality of lens units; The lighting device further comprises a position information determination module, a mode determination module and a control module, wherein the control module is electrically connected to the position information determination module, the mode determination module and the lens array respectively, wherein the mode determination module comprises a first mode and a second mode; The control module is used for receiving the position information of at least one local lighting area acquired by the position information determination module when the mode determination module determines that the adjustment mode of the lighting device is the first mode, and controlling the optical axis of at least part of the lens unit to be directed toward the local lighting area according to the position information, so that the light emitted through at least part of the lens unit is concentrated in the local lighting area; Or it is used to make the light emitted by the light source module be emitted uniformly after passing through the lens array when the mode determination module determines that the adjustment mode of the lighting device is the second mode.

2. The lighting device according to claim 1, characterized in that: The light source module includes a plurality of point light sources; The arrangement direction of the point light sources is the same as the arrangement direction of the lens units, and the point light sources and the lens units are arranged in a one-to-one correspondence.

3. The lighting device according to claim 1, characterized in that: The lens unit includes a liquid lens; The liquid lens comprises a cavity, a first electrode and a second electrode; The first electrode is located at the bottom of the cavity, the second electrode includes a plurality of second sub-electrodes, the plurality of second sub-electrodes surround the side wall of the cavity, and an insulating layer is provided between the second sub-electrodes and the side wall; The cavity is filled with a first liquid and a second liquid, the first liquid and the second liquid are immiscible with each other and have different electrical conductivity and refractive index; The first liquid is in contact with the first electrode.

4. The lighting device according to claim 3, characterized in that: The first liquid includes a conductive liquid, and the second liquid includes an insulating liquid.

5. The lighting device according to claim 1, characterized in that: The distance D between the light source module and the lens array satisfies: L / 2≤D≤L; Wherein, L is the focal length of the lens unit.

6. A method for adjusting the optical axis of an optical axis adjustable lighting device, applied to the optical axis adjustable lighting device according to any one of claims 1 to 5, characterized in that: The optical axis adjustment method comprises: determining an adjustment mode of the lighting device; When it is determined that the adjustment mode is the first mode, obtaining position information of at least one local illumination area, and controlling the optical axes of at least part of the lens units to be oriented toward the local illumination area according to the position information, so that the light emitted through at least part of the lens units is concentrated in the local illumination area; When the adjustment mode is determined to be the second mode, the light emitted by the light source module is made to be emitted evenly after passing through the lens array.

7. The optical axis adjustment method according to claim 6, characterized in that: The lens unit includes a liquid lens; The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes; The cavity is filled with a first liquid and a second liquid, and the position information includes position information of a local illumination area; The controlling the optical axis of at least part of the lens unit to be directed toward the local illumination area according to the position information comprises: Determine voltage information of the first electrode and the plurality of second sub-electrodes of at least part of the lens units according to the position information; According to the voltage information of different lens units, a voltage is applied to the corresponding lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding lens unit so that the inclination direction of the contact surface is toward the local illumination area, wherein the inclination degrees of the contact surfaces of different lens units are different.

8. The optical axis adjustment method according to claim 6, characterized in that: The lens unit includes a liquid lens; The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes; The cavity is filled with a first liquid and a second liquid; The local lighting area includes a first local lighting area and a second local lighting area; The controlling the optical axis of at least part of the lens unit to be directed toward the local illumination area according to the position information comprises: Determine voltage information of a first electrode and a second sub-electrode of a first lens unit close to the first position information according to the first position information of the first local illumination area; Applying voltage to the corresponding first lens unit according to voltage information of different first lens units, changing the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding first lens unit, so that the inclination direction of the contact surface in the first lens unit is toward the first local illumination area, and the inclination degrees of the contact surfaces of different first lens units are different; Determining voltage information of a first electrode and a second sub-electrode of a second lens unit close to the second position information according to the second position information of the second local illumination area; According to the voltage information of different second lens units, a voltage is applied to the corresponding second lens unit to change the inclination of the contact surface formed by the first liquid and the second liquid in the corresponding second lens unit, so that the inclination direction of the contact surface in the second lens unit is toward the second local illumination area, and the inclination degrees of the contact surfaces of different second lens units are different.

9. The optical axis adjustment method according to claim 6, characterized in that: When determining that the adjustment mode is the second mode, making the light emitted by the light source module uniformly emitted after passing through the lens array comprises: When it is determined that the adjustment mode is the second mode, the optical axis of each lens unit is controlled to be parallel to the central axis of the lens unit, so that the light emitted by the light source module is emitted evenly after passing through the lens array.

10. The optical axis adjustment method according to claim 9, characterized in that: The lens unit includes a liquid lens; The liquid lens comprises a cavity, a first electrode and a second electrode, wherein the second electrode comprises a plurality of second sub-electrodes; The cavity is filled with a first liquid and a second liquid; The controlling the optical axis of each lens unit to be parallel to the central axis of the lens comprises: No voltage is applied to the first electrode and the plurality of second sub-electrodes of each lens unit, so that the contact surface between the first liquid and the second liquid is a plane, so that the light emitted by the light source module is emitted uniformly after passing through the lens array.

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