Projection structure, dishwasher and its control method

Abstract

This application relates to a projection structure, a dishwasher, and a control method thereof. The projection structure includes: a frame; a light source, disposed on the frame, for projecting light onto a receiving surface along a first direction and forming a light spot on the receiving surface; a first lens group connected between the frame and a second lens group, the first lens group including a convex lens, the second lens group including a concave lens, the concave lens and the convex lens being sequentially arranged along the projection path of the light source along the first direction; a first driving member and a second driving member, the first driving member being drively connected to the first lens group, and the second driving member being drively connected to the second lens group; wherein, the first driving member drives the first lens group to move the second lens group synchronously along the first direction or the second direction until the light spot area is a preset area; the second driving member drives the second lens group to move relative to the first lens group along the first direction or the second direction until the light spot contrast is a preset contrast. The light spot formed by the projection structure, dishwasher, and control method provided in this application is easily identifiable.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a projection structure, a dishwasher and a control method thereof. Background Technology

[0002] For fully integrated dishwashers, because the dishwasher is completely embedded in the interior cabinetry, the front of the dishwasher is obscured, and the operating information displayed on the front cannot be viewed by the user. To address this, the dishwasher is equipped with a projection structure that projects light onto the ground, creating a light spot. The user can then see the dishwasher's operating status through this light spot and take timely action.

[0003] However, the light spots projected by traditional projection structures are difficult for users to identify, resulting in a poor user experience. Therefore, how to provide a projection structure with a light spot that is easily recognizable by users has become an urgent problem to be solved. Summary of the Invention

[0004] Therefore, it is necessary to provide a projection structure, a dishwasher, and a control method thereof to address the above problems.

[0005] A projection structure, comprising:

[0006] frame;

[0007] A light source is mounted on the frame and is used to project light onto the receiving surface along a first direction and form a light spot on the receiving surface;

[0008] A first lens group and a second lens group, wherein the first lens group is connected between the frame and the second lens group, the first lens group includes a convex lens, and the second lens group includes a concave lens, and the concave lens and the convex lens are arranged sequentially along the first direction on the projection path of the light source.

[0009] The drive assembly includes a first drive component and a second drive component. The first drive component is mounted on the frame and is drivenly connected to the first lens group. The second drive component is mounted on the first lens group and is drivenly connected to the second lens group.

[0010] Wherein, the first driving member drives the first lens group to move synchronously with the second lens group along the first direction or the second direction until the light spot area is a preset area; the second driving member drives the second lens group to move relative to the first lens group along the first direction or the second direction until the light spot contrast is a preset contrast.

[0011] The second direction is opposite to the first direction.

[0012] In some embodiments, the first lens group includes a first support, and the convex lens is mounted on the first support; the second lens group includes a second support, and the concave lens is mounted on the second support.

[0013] The first driving component is connected to the first bracket in a driving manner, and the second driving component is assembled on the first bracket and connected to the second bracket in a driving manner.

[0014] In some embodiments, the second support includes a cylindrical second support body, and the concave lens is fitted inside the second support body;

[0015] The first bracket includes a cylindrical first bracket body, one end of which is sleeved outside the second bracket body, and the convex lens is assembled inside the first bracket body and located at the end of the first bracket body away from the second bracket body.

[0016] In some embodiments, the second bracket further includes a second connecting rib protruding from the outer wall of the second bracket body; the first bracket further includes a mounting portion protruding from the outer wall of the first bracket body, the mounting portion having a mounting groove, the groove opening facing the second connecting rib;

[0017] The second driving component includes a second driving body and a second driving shaft. The second driving body is installed in the mounting groove, and the second driving shaft extends out of the mounting groove and is connected to the second connecting rib in a transmission manner.

[0018] In some embodiments, the first bracket further includes a first connecting rib assembled on the mounting portion, and the frame is configured to form a limiting groove;

[0019] The first driving component includes a first driving body and a first driving shaft. The first driving body is confined within the limiting groove, and the first driving shaft extends out of the limiting groove and is connected to the first connecting rib in a transmission manner.

[0020] In some embodiments, an image acquisition device is also included mounted on the rack. The light source, the image acquisition device, the first driving device, and the second driving device are all electrically connected to the controller. The image acquisition device is used to acquire a light spot image, and the controller is used to obtain the light spot area and the light spot contrast based on the light spot image.

[0021] A dishwasher includes a projection structure as described in any of the above embodiments.

[0022] In some embodiments, a controller and a main structure are also included. The projection structure and the controller are both disposed on the main structure. The projection structure also includes an image acquisition device. The controller is electrically connected to the light source, the image acquisition device, the first driving device, and the second driving device.

[0023] A method for controlling a dishwasher includes the following steps:

[0024] Control the light source to project light onto the receiving surface and form a light spot on the receiving surface;

[0025] The first driving component is controlled to drive the first mirror group to move the second mirror group synchronously along the first or second direction until the area of ​​the light spot is the preset area.

[0026] The second driving element is controlled to drive the second mirror group to move relative to the first mirror group along the first direction or the second direction until the light spot contrast is a preset contrast.

[0027] Wherein, the first direction is opposite to the second direction.

[0028] In some embodiments, the steps further include:

[0029] The image acquisition device is controlled to acquire a light spot image, and the area and contrast of the light spot are obtained based on the light spot image.

[0030] The aforementioned projection structure, dishwasher, and control method involve a first driving component that drives a first mirror group to move a second mirror group synchronously along a first or second direction to adjust the light spot area to a preset area. A second driving component then drives the second mirror group to move along the first or second direction to adjust the light spot contrast to a preset contrast ratio. Thus, when the light spot area and contrast ratio in this application reach the preset area and contrast ratio, the user can easily identify the light spot, resulting in a better user experience. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the projection structure in this application.

[0032] Figure 2 for Figure 1 The sectional view of the projected structure shown.

[0033] Figure 3 for Figure 1 An exploded view of the projected structure shown.

[0034] Figure 4 for Figure 1 The light source generated by the projection structure shown passes through a concave lens and a convex lens in sequence.

[0035] Figure 5 This is a flowchart illustrating the control method for a dishwasher.

[0036] Icon labels:

[0037] 1. Projection structure;

[0038] 10. First lens group; 20. Second lens group; 30. Drive assembly; 40. Frame; 50. Light source; 60. Image acquisition unit; 70. Fixture;

[0039] 11. First bracket; 111. First bracket body; 112. First connecting rib; 113. Mounting part; 1131. Mounting groove; 12. Convex lens;

[0040] 21. Second support; 211. Main body of the second support; 212. Second connecting rib; 22. Concave lens;

[0041] 31. First driving component; 311. First driving body; 312. First driving shaft; 32. Second driving component; 321. Second driving body; 322. Second driving shaft;

[0042] 41. Limiting part; 42. First plate; 43. Second plate;

[0043] X, the first direction; Y, the second direction. Detailed Implementation

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] Please see Figure 1In a first aspect, this application discloses a projection structure 1, which is disposed on the main structure of a household appliance. The main structure is the part of the household appliance mainly used to perform its main functions, and the projection structure 1 is used to project light onto a receiving surface and form a light spot on the receiving surface. The light spot represents the working information of the household appliance. The receiving surface can be the ground, a wall, etc., and the household appliance can be a dishwasher, washing machine, dryer, etc. For ease of explanation, the following embodiments are all described using the ground as the receiving surface and a dishwasher as an example. When the household appliance is a dishwasher, the main structure is mainly used to perform the dishwashing function.

[0051] The light spot can be a digital light spot, a graphic light spot, a text light spot, etc. Digital, graphic, and text light spots can all be used to represent the dishwasher's working time, working mode, fault information, etc. For example, a digital light spot is used to represent the dishwasher's working time or remaining working time; for instance, a digital light spot of 10 indicates that the dishwasher has 10 minutes of remaining working time. Similarly, a graphic light spot is used to represent the dishwasher's working mode; for example, a square graphic light spot indicates that the dishwasher is in washing mode, and a triangle graphic light spot indicates that the dishwasher is in drying mode. Finally, a text light spot is used to represent the dishwasher's fault information; for example, a text light spot displaying the words "Water Short" indicates that there is insufficient water in the dishwasher's washing tub.

[0052] Please refer to it again. Figure 1 And see also Figure 2 and Figure 3 The projection structure 1 includes a frame 40, a light source 50, a first lens group 10, a second lens group 20, and a drive assembly 30. The light source 50 is mounted on the frame 40 and projects light along a first direction X towards a receiving surface, forming a light spot on the receiving surface. The first lens group 10 connects the frame 40 and the second lens group 20. The first lens group 10 includes a convex lens 12, and the second lens group 20 includes a concave lens 22. The concave lens 22 and the convex lens 12 are sequentially arranged along the projection path of the light source 50 along the first direction X. The drive assembly 30 includes a first drive member 31 and a second drive member 32. The first drive member 31 is mounted on the frame 40 and is driveably connected to the first lens group 10, and the second drive member 32 is mounted on the first lens group 10 and is driveably connected to the second lens group 20. The first driving member 31 drives the first lens group 10 to move the second lens group 20 synchronously along the first direction X or the second direction Y until the light spot area is a preset area; the second driving member 32 drives the second lens group 20 to move relative to the first lens group 10 along the first direction X or the second direction Y until the light spot contrast is a preset contrast; the second direction Y is opposite to the first direction X.

[0053] Taking the ground as the receiving surface as an example, the first direction X is the direction of gravity or the downward tilt direction. When the first direction X is the direction of gravity, the second direction Y is the vertical upward direction. When the first direction X is the upward tilt direction, the second direction Y is the upward tilt direction.

[0054] The frame 40 serves as a support and mounting element. For example, the frame 40 may include a first plate 42 and a second plate 43 bent relative to the second plate 43. The first plate 42 is mounted to the main structure of the household appliance via a fastener 70, and the second plate 43 is used to mount the light source 50 and the first mirror assembly 10. The fastener 70 may be a screw, pin, or other structure.

[0055] The angle between the first plate 42 and the second plate 43 can be set to 30°, 60°, 150°, etc., as needed. Figure 1 For example, the first plate 42 is a vertical plate, the second plate 43 is a horizontal plate, and the included angle between the first plate 42 and the second plate 43 is 90°. The light source 50 and the first mirror group 10 are both located on the lower surface of the second plate 43.

[0056] The first driving component 31 and the second driving component 32 can be a motor, a telescopic cylinder, etc.

[0057] Concave lens 22 and convex lens 12 are arranged sequentially along the first direction X on the projection path of light source 50. Therefore, the light emitted from light source 50 passes through concave lens 22 and convex lens 12 in sequence and forms a light spot on the receiving surface.

[0058] The focal length of the convex lens 12 is defined as f. 凸 The focal length of concave lens 22 is f. 凹 f 凸 <f 凹 In this way, the light emitted by the light source 50 will converge after passing through the concave lens 22 and the convex lens 12 in sequence, and form a light spot on the receiving surface.

[0059] Concave lens 22 and convex lens 12 form a lens assembly, and the focal length of the lens assembly is defined as f. 总 ,0mm<f 总 ≤50mm. The distance between the light source 50 and the optical center of the lens assembly is d1, and the distance between the light spot and the optical center of the lens assembly is d2. d1 and d2 must satisfy the following condition: f 总 <d1≤2*f 总 d2>2f 总 In this way, an inverted, magnified, and clear light spot can be formed on the receiving surface.

[0060] In f 凸 <f 凹 ,f 总 <d1≤2*f总 d2>2f 总 Under the following conditions, when the first driving member 31 drives the first lens group 10 to move synchronously along the second direction Y, causing d1 to decrease and d2 to increase, the lens assembly gradually approaches the light source 50, and the light spot area increases. When the first driving member 31 drives the first lens group 10 to move synchronously along the first direction X, causing d1 to increase and d2 to decrease, the lens assembly gradually moves away from the light source 50, and the light spot area decreases.

[0061] Among them, f 总 It is not static; its distance changes slightly depending on the spacing between the concave lens 22 and the convex lens 12. When the second lens group 20 moves relative to the first lens group 10 along the first direction X or the second direction Y, the spacing between the convex lens 12 and the concave lens 22 can be finely adjusted to adjust for f. 总 Make minor adjustments.

[0062] Please refer to the following: Figure 4 In related technologies, the projection structure 1 only has a single convex lens 12. Due to the structure of the convex lens 12 itself, both the central ray and the peripheral ray emitted by the light source 50 will form a focal point after passing through the convex lens 12, and the distance between the focal point formed by the central ray and the optical center of the convex lens 12 is the aforementioned f. 凸 The distance between the focal point of the peripheral rays and the optical center of the convex lens 12 is L. 凸 And L 凸 Greater than f 凸 That is, the focal point formed by the central ray after passing through the convex lens 12 is farther from the optical center of the convex lens 12 than the focal point formed by the peripheral ray after passing through the convex lens 12. Thus, there is a phase difference (L) between the focal point formed by the central ray and the focal point formed by the peripheral ray on the principal optical axis of the convex lens 12. 凸 with f 凸 (Difference in distance along the principal optical axis).

[0063] The central ray, after passing through the convex lens 12, forms the central region of the light spot on the receiving surface, while the peripheral rays, after passing through the convex lens 12, form the peripheral region of the light spot on the receiving surface. The peripheral regions surround the outer periphery of the central region. Because the focal points formed by the central and peripheral rays after passing through the convex lens 12 do not coincide, and L... 凸 Greater than f 凸 This results in a clear central area of ​​the light spot but a blurred edge area. Consequently, users cannot identify the operational information represented by the light spot, making spot recognition difficult and negatively impacting the user experience.

[0064] Furthermore, the size of the light spot is also closely related to the difficulty of spot recognition. The larger the light spot, the easier it is for users to see and recognize, and the easier it is to recognize. Moreover, in related technologies, the position of the convex lens 12 is fixed, so the light spot size cannot be adjusted according to the user's visual needs, further increasing the difficulty of spot recognition.

[0065] In this application, a concave lens 22 is disposed upstream of the convex lens 12 in the projection direction, and the second lens group 20 is driven by the second driving member 32 and moves within a small range relative to the first lens group 10 along the first direction X or the second direction Y. During the movement, the distance between the concave lens 22 and the convex lens 12 changes, f 总 A fine adjustment occurs, and the central ray that passes through the concave lens 22 and is incident on the convex lens 12 (e.g.) Figure 4 As shown in A) and edge rays (as shown in A) Figure 4 If the incident angles of the light rays (as shown in B) change, the distance between the focal points formed by the central ray and the edge ray after passing through the convex lens 12 will also change. This will cause the phase difference of the focal points formed by the central ray and the edge ray after passing through the convex lens 12 on the principal optical axis of the convex lens 12 to change, resulting in a change in the contrast of the light spot.

[0066] Understandably, spot contrast refers to the contrast between the spot and the receiving surface. The higher the spot contrast, the more obvious the boundary between the spot and the receiving surface, and the clearer and easier the spot is to be recognized by the user.

[0067] When the concave lens 22 moves to a critical position relative to the convex lens 12, the distance between the concave lens 22 and the convex lens 12 and f 总 Both conditions are suitable. At this point, the central and peripheral rays incident on the convex lens 12 after passing through the concave lens 22 coincide at the focal point on the side of the convex lens 12 facing away from the concave lens 22, thus correcting the phase difference and achieving the preset contrast of the light spot. When the light spot contrast reaches the preset contrast, the boundary between the entire light spot and the receiving surface is obvious, the light spot is clear, and it can be clearly identified by the user.

[0068] Understandably, the critical position refers to the position of the concave lens 22 relative to the convex lens 12 when the focal points formed by the central and peripheral rays incident on the side of the convex lens 12 facing away from the concave lens 22 coincide. The preset contrast ratio refers to the contrast between the light spot and the receiving surface when the light spot is clear and can be clearly identified by the user.

[0069] It is worth mentioning that the light spot contrast will only reach the preset contrast when the concave lens 22 is in a critical position relative to the convex lens 12. When the concave lens 22 is not in a critical position relative to the convex lens 12, the light spot contrast is less than the preset contrast, the light spot is blurry, and the light spot and the working information represented by the light spot are not easy to identify.

[0070] Furthermore, the first driving component 31 drives the first lens group 10 to move the second lens group 20 synchronously along the first direction X or the second direction Y, so as to adjust the spot area to a preset area. Thus, when the spot area in this application reaches the preset area, the user can easily identify the spot, resulting in a better user experience.

[0071] In some embodiments of this application, the first lens group 10 includes a first support 11, and a convex lens 12 is mounted on the first support 11; the second lens group 20 includes a second support 21, and a concave lens 22 is mounted on the second support 21; the first driving member 31 is connected to the first support 11 in a driving manner, and the second driving member 32 is mounted on the first support 11 and connected to the second support 21 in a driving manner.

[0072] The first driving element 31 drives the first bracket 11 to move the convex lens 12, the second driving element 32, the second bracket 21 and the concave lens 22 along the first direction X or the second direction Y.

[0073] By setting the first bracket 11, the convex lens 12 and the second driving component 32 can be easily assembled. By setting the second bracket 21, the concave lens 22 can be easily assembled. In addition, the setting of the first bracket 11 and the second bracket 21 also allows the first lens group 10 and the second lens group 20 to be connected as a whole, improving the compactness of the projection structure 1.

[0074] Furthermore, in some embodiments of this application, the second support 21 includes a cylindrical second support body 211, and the concave lens 22 is assembled inside the second support body 211; the first support 11 includes a cylindrical first support body 111, one end of the first support body 111 is sleeved outside the second support body 211, and the convex lens 12 is assembled inside the first support body 111 and located at the end of the first support body 111 away from the second support body 211.

[0075] The first support body 111 and the second support body 211 can protect the convex lens 12 and the concave lens 22 respectively, thereby reducing external interference to the concave lens 22 and the convex lens 12. One end of the first support body 111 is sleeved on the outside of the second support body 211, so that the first support body 111 and the second support body 211 can guide each other during relative movement, thereby improving the stability of movement. In addition, it also helps to improve the compactness of the assembly of the first lens group 10 and the second lens group 20.

[0076] Furthermore, in some embodiments of this application, the second bracket 21 further includes a second connecting rib 212 protruding from the outer wall of the second bracket body 211; the first bracket 11 further includes a mounting portion 113 protruding from the outer wall of the first bracket body 111, the mounting portion 113 having a mounting groove 1131 inside, the groove opening of the mounting groove 1131 facing the second connecting rib 212.

[0077] The second driving component 32 includes a second driving body 321 and a second driving shaft 322. The second driving body 321 is installed in the mounting groove 1131, and the second driving shaft 322 extends out of the mounting groove 1131 and is connected to the second connecting rib 212 for transmission.

[0078] The second support body 211 and the second connecting rib 212, as well as the first support body 111 and the mounting part 113, can be integrally formed or separately formed, and can be set according to needs.

[0079] The second connecting rib 212 and the mounting part 113 are arranged along the first direction X, and the second drive shaft 322 extends along the second direction Y and is connected to the second connecting rib 212 in a transmission manner.

[0080] In actual operation, the second drive body 321 works, and the second drive shaft 322 drives the second connecting rib 212 to move the second support body 211 and the concave lens 22 along the first direction X or the second direction Y, so as to realize the movement of the concave lens 22 relative to the convex lens 12.

[0081] The mounting slot 1131 on the mounting section 113 facilitates the installation of the second drive component 32, improves the ease of installation of the second drive component 32, and helps to improve the compactness of the projection structure 1 layout.

[0082] In some embodiments of this application, the first bracket 11 further includes a first connecting rib 112 mounted on the mounting portion 113, and a limiting groove is formed on the frame 40; the first driving member 31 includes a first driving body 311 and a first driving shaft 312, the first driving body 311 is limited within the limiting groove, and the first driving shaft 312 extends out of the limiting groove and is connected to the first connecting rib 112 in a transmission manner.

[0083] Specifically, the frame 40 also includes a limiting part 41, which protrudes along the first direction X onto the lower surface of the second plate 43. The limiting part 41 has a limiting groove with the opening facing downward.

[0084] The limiting part 41 and the first connecting rib 112 are arranged along the first direction X, the first driving body 311 is limited in the limiting groove, and the first driving shaft 312 extends along the first direction X and is connected to the first connecting rib 112.

[0085] The limiting part 41 and the second plate 43 can be integrally formed or separately formed, which can be set according to the needs.

[0086] The upper limit groove of the limiting part 41 facilitates the installation of the first driving component 31, improves the ease of installation of the first driving component 31, and makes the assembly between the projection structures 1 more compact.

[0087] In some embodiments of this application, the projection structure 1 further includes an image acquisition unit 60 mounted on the frame 40. The light source 50, the image acquisition unit 60, the first driving unit 31 and the second driving unit 32 are all electrically connected to the controller. The image acquisition unit 60 is used to acquire a light spot image, and the controller is used to obtain the light spot area and light spot contrast based on the light spot image.

[0088] The controller is located on the main structure of the dishwasher.

[0089] The image acquisition device 60 can be a camera, a camera, or other device used for acquiring images.

[0090] In this application, the preset area can be the spot area input by the user to the controller, or it can be the spot area pre-stored in the controller. For ease of explanation, the following embodiments will all use the spot area input by the user as the preset area as an example. The user believes that only when the spot area on the receiving surface reaches the preset area can the spot be easily identified and the operating information of the household appliances carried by the spot be obtained.

[0091] In actual operation, the user inputs a preset area to the controller via an interactive device (such as buttons on the main structure). After the controller determines the preset area, it controls the first driving component 31 to drive the first support 11, which in turn drives the convex lens 12 and the concave lens 22 to move synchronously along the first direction X or the second direction Y. During this process, the image acquisition component 60 takes a picture of the receiving surface to acquire a light spot image and feeds the light spot image back to the controller. The controller obtains the light spot area based on the light spot image fed back by the image acquisition component 60 and compares the light spot area with the preset area. If the light spot area is not equal to the preset area, the controller controls the first driving component 31 to drive the first support 11, the convex lens 12, and the second lens group 20 to move along the first direction X or the second direction Y until the light spot area reaches the preset area. Specifically, if the light spot area is smaller than the preset area, the first driving component 31 drives the lens combination formed by the combination of the convex lens 12 and the concave lens 22 to move along the second direction Y, so that the lens combination gradually approaches the light source 50 and the light spot area increases. If the area of ​​the light spot is larger than the preset area, the first driving member 31 drives the lens assembly to move along the first direction X, so that the lens assembly gradually moves closer to the light source 50 and the area of ​​the light spot decreases.

[0092] When the area of ​​the light spot reaches a preset area, the controller stops the first driving unit 31. At this time, the image acquisition unit 60 continues to acquire the light spot image. The controller obtains the light spot contrast based on the light spot image and compares it with the preset contrast. If the light spot contrast is not equal to the preset contrast, the controller controls the second driving unit 32 to drive the second lens group 20 to move along the first direction X or the second direction Y until the light spot contrast reaches the preset contrast. The preset contrast is a light spot contrast pre-stored in the controller. Specifically, when the light spot contrast is below the preset contrast, the light spot is blurry and the user cannot easily identify it. At this time, the controller controls the second driving unit 32 to drive the second lens group 20 to reciprocate in the first direction X or the second direction Y, and adjusts the position of the concave lens 22 relative to the convex lens 12 until the light spot contrast reaches the preset contrast. When the light spot contrast reaches the preset contrast, the light spot is clear and can be easily identified by the user. At this time, the concave lens 22 is located at the aforementioned critical position relative to the convex lens 12.

[0093] It is worth mentioning that during the process of the second driving member 32 driving the concave lens 22 to move relative to the convex lens 12, the relative position between the concave lens 22 and the convex lens 12 changes, which causes the focal length f of the lens combination formed by the concave lens 22 and the convex lens 12 to change. 总 The situation has also changed; the spot area may no longer be the preset area. Therefore, when the spot contrast is adjusted to the preset contrast, the image acquisition unit 60 will continue to acquire the spot image, and the controller will reacquire the spot area. If the spot area is not equal to the preset area, the above operation of adjusting the spot area to the preset area will be repeated.

[0094] By setting the image acquisition component 60, the projection structure 1 can automatically adjust the contrast and area of ​​the light spot, making the use of the projection structure 1 more intelligent and automated.

[0095] Secondly, this application also protects a dishwasher that includes the projection structure 1 described in any of the above embodiments.

[0096] The dishwasher in this embodiment has the effects of any of the above embodiments, so it will not be described again here.

[0097] In some embodiments of this application, the dishwasher further includes a controller and a main structure. The projection structure 1 and the controller are both disposed on the main structure. The projection structure 1 also includes an image acquisition element 60. The controller is electrically connected to the light source 50, the image acquisition element 60, the first drive element 31, and the second drive element 32. The effects of this embodiment are the same as those of the embodiment with the image acquisition element 60 in the projection structure 1 described above, and therefore will not be repeated here.

[0098] In some embodiments of this application, the main structure includes a cabinet and a cabinet door. The cabinet has a washing cavity and an opening communicating with the washing cavity. The cabinet door is rotatably mounted on the cabinet and used to open and close the opening of the cabinet. The projection structure 1 can be mounted on the cabinet door and exposed outside the cabinet door, or the bottom surface of the cabinet door can be recessed to form a storage groove, in which the projection structure 1 is housed and projects a light spot onto the ground.

[0099] Please refer to it again. Figures 1 to 4 And see also Figure 5 Thirdly, this application also provides a control method for a dishwasher, the control method corresponding to the structure of the dishwasher described in any of the above embodiments. The control method includes the following steps:

[0100] S100: Control the light source 50 to project light onto the receiving surface and form a light spot on the receiving surface;

[0101] S200: Control the first driving element 31 to drive the first mirror group 10 to drive the second mirror group 20 to move synchronously along the first direction X or the second direction Y until the area of ​​the light spot is the preset area.

[0102] S300: Control the second driving unit 32 to drive the second mirror group 20 to move relative to the first mirror group 10 along the first direction X or the second direction Y until the light spot contrast is a preset contrast.

[0103] Wherein, the first direction X is opposite to the second direction Y.

[0104] The receiving surface can be the ground, wall, etc.

[0105] The light spot can be a digital light spot, a graphic light spot, a text light spot, etc. Digital, graphic, and text light spots can all be used to represent the dishwasher's working time, working mode, fault information, etc. For example, a digital light spot is used to represent the dishwasher's working time or remaining working time; for instance, a digital light spot of 10 indicates that the appliance has 10 minutes of remaining working time. Similarly, a graphic light spot is used to represent the dishwasher's working mode; for example, a square graphic light spot indicates that the dishwasher is in washing mode, and a triangle graphic light spot indicates that the dishwasher is in drying mode. Finally, a text light spot is used to represent the dishwasher's fault information; for example, a text light spot displaying the words "Water Short" indicates that there is insufficient water in the dishwasher's washing tub.

[0106] The dishwasher includes a main structure, a controller, and the projection structure 1 described in any of the above embodiments. The light source 50, the first driving component 31, and the second driving component 32 are all electrically connected to the controller.

[0107] By placing a concave lens 22 upstream of the convex lens 12 in the projection direction, and controlling the second driving member 32 to drive the second lens group 20 to move relative to the first lens group 10 within a small range along the first direction X or the second direction Y, during the movement, the distance between the concave lens 22 and the convex lens 12 changes, f 总 When a fine adjustment occurs, and the incident angles of the central ray and the peripheral ray incident on the convex lens 12 after passing through the concave lens 22 change, the distance between the focal points formed by the central ray and the peripheral ray after passing through the convex lens 12 will also change. This will cause the phase difference of the focal points formed by the central ray and the peripheral ray after passing through the convex lens 12 on the principal optical axis of the convex lens 12 to change, resulting in a change in the contrast of the light spot.

[0108] Understandably, spot contrast refers to the contrast between the spot and the receiving surface. The higher the spot contrast, the more obvious the boundary between the spot and the receiving surface, and the clearer and easier the spot is to be recognized by the user.

[0109] When the concave lens 22 moves to a critical position relative to the convex lens 12, the distance between the concave lens 22 and the convex lens 12 and f 总 Both conditions are suitable. At this point, the central and peripheral rays incident on the convex lens 12 after passing through the concave lens 22 coincide at the focal point on the side of the convex lens 12 facing away from the concave lens 22, thus correcting the phase difference and achieving the preset contrast of the light spot. When the light spot contrast reaches the preset contrast, the boundary between the entire light spot and the receiving surface is obvious, the light spot is clear, and it can be clearly identified by the user.

[0110] Understandably, the critical position refers to the position of the concave lens 22 relative to the convex lens 12 when the focal points formed by the central and peripheral rays incident on the side of the convex lens 12 facing away from the concave lens 22 coincide. The preset contrast ratio refers to the contrast between the light spot and the receiving surface when the light spot is clear and can be clearly identified by the user.

[0111] It is worth mentioning that the light spot contrast will only reach the preset contrast when the concave lens 22 is in a critical position relative to the convex lens 12. When the concave lens 22 is not in a critical position relative to the convex lens 12, the light spot contrast is less than the preset contrast, the light spot is blurry, and the light spot and the working information represented by the light spot are not easy to identify.

[0112] Furthermore, the first driving component 31 drives the first lens group 10 to move the second lens group 20 synchronously along the first direction X or the second direction Y, so as to adjust the spot area to a preset area. Thus, when the spot area in this application reaches the preset area, the user can easily identify the spot, resulting in a better user experience.

[0113] In some embodiments of this application, the dishwasher control method further includes the following steps:

[0114] S400: Control the image acquisition unit 60 to acquire a light spot image, and obtain the light spot area and the light spot contrast based on the light spot image.

[0115] The image acquisition unit 60 is electrically connected to the controller.

[0116] In actual operation, the user inputs a preset area to the controller via an interactive device (such as buttons on the main structure). After the controller determines the preset area, it controls the first driving component 31 to drive the first support 11, which in turn drives the convex lens 12 and the concave lens 22 to move synchronously along the first direction X or the second direction Y. During this process, the image acquisition component 60 takes a picture of the receiving surface to acquire a light spot image and feeds the light spot image back to the controller. The controller obtains the light spot area based on the light spot image fed back by the image acquisition component 60 and compares the light spot area with the preset area. If the light spot area is not equal to the preset area, the controller controls the first driving component 31 to drive the first support 11, the convex lens 12, and the second lens group 20 to move along the first direction X or the second direction Y until the light spot area reaches the preset area. Specifically, if the light spot area is smaller than the preset area, the first driving component 31 drives the lens combination formed by the combination of the convex lens 12 and the concave lens 22 to move along the second direction Y, so that the lens combination gradually approaches the light source 50 and the light spot area increases. If the area of ​​the light spot is larger than the preset area, the first driving member 31 drives the lens assembly to move along the first direction X, so that the lens assembly gradually moves closer to the light source 50 and the area of ​​the light spot decreases.

[0117] When the area of ​​the light spot reaches a preset area, the controller stops the first driving unit 31. At this time, the image acquisition unit 60 continues to acquire the light spot image. The controller obtains the light spot contrast based on the light spot image and compares it with the preset contrast. If the light spot contrast is not equal to the preset contrast, the controller controls the second driving unit 32 to drive the second lens group 20 to move along the first direction X or the second direction Y until the light spot contrast reaches the preset contrast. The preset contrast is a light spot contrast pre-stored in the controller. Specifically, when the light spot contrast is below the preset contrast, the light spot is blurry and the user cannot easily identify it. At this time, the controller controls the second driving unit 32 to drive the second lens group 20 to reciprocate in the first direction X or the second direction Y, and adjusts the position of the concave lens 22 relative to the convex lens 12 until the light spot contrast reaches the preset contrast. When the light spot contrast reaches the preset contrast, the light spot is clear and can be easily identified by the user. At this time, the concave lens 22 is located at the aforementioned critical position relative to the convex lens 12.

[0118] It is worth mentioning that during the process of the second driving member 32 driving the concave lens 22 to move relative to the convex lens 12, the relative position between the concave lens 22 and the convex lens 12 changes, which causes the focal length f of the lens combination formed by the concave lens 22 and the convex lens 12 to change. 总 The situation has also changed; the spot area may no longer be the preset area. Therefore, when the spot contrast is adjusted to the preset contrast, the image acquisition unit 60 will continue to acquire the spot image, and the controller will reacquire the spot area. If the spot area is not equal to the preset area, the above operation of adjusting the spot area to the preset area will be repeated.

[0119] By setting step S400: controlling the image acquisition unit 60 to acquire a light spot image, and obtaining the light spot area and the light spot contrast based on the light spot image, the projection structure 1 can automatically adjust the light spot contrast and the light spot area, making the use of the projection structure 1 more intelligent and automated.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A projection structure, characterized in that, include: Rack (40); A light source (50) is disposed on the frame (40) and is used to project light onto the receiving surface along the first direction (X) and form a light spot on the receiving surface; The first lens group (10) and the second lens group (20) are connected between the frame (40) and the second lens group (20). The first lens group (10) includes a convex lens (12), and the second lens group (20) includes a concave lens (22). The concave lens (22) and the convex lens (12) are arranged sequentially along the first direction (X) on the projection path of the light source (50). The drive assembly (30) includes a first drive member (31) and a second drive member (32). The first drive member (31) is mounted on the frame (40) and is connected to the first lens group (10) in a driving connection. The second drive member (32) is mounted on the first lens group (10) and is connected to the second lens group (20) in a driving connection. Wherein, the first driving member (31) drives the first mirror group (10) to move the second mirror group (20) synchronously along the first direction (X) or the second direction (Y) until the light spot area is a preset area; the second driving member (32) drives the second mirror group (20) to move relative to the first mirror group (10) along the first direction (X) or the second direction (Y) until the light spot contrast is a preset contrast. The second direction (Y) is opposite to the first direction (X).

2. The projection structure according to claim 1, characterized in that, The first lens group (10) includes a first support (11), and the convex lens (12) is mounted on the first support (11). The second lens group (20) includes a second support (21), and the concave lens (22) is mounted on the second support (21). The first driving member (31) is connected to the first bracket (11) in a transmission connection, and the second driving member (32) is mounted on the first bracket (11) and is connected to the second bracket (21) in a transmission connection.

3. The projection structure according to claim 2, characterized in that, The second bracket (21) includes a cylindrical second bracket body (211), and the concave lens (22) is assembled inside the second bracket body (211); The first bracket (11) includes a cylindrical first bracket body (111), one end of which is sleeved outside the second bracket body (211), and the convex lens (12) is assembled inside the first bracket body (111) and located at the end of the first bracket body (111) away from the second bracket body (211).

4. The projection structure according to claim 3, characterized in that, The second bracket (21) further includes a second connecting rib (212) protruding from the outer wall of the second bracket body (211); the first bracket (11) further includes a mounting part (113) protruding from the outer wall of the first bracket body (111), the mounting part (113) having a mounting groove (1131) inside, the groove opening of the mounting groove (1131) facing the second connecting rib (212); The second driving component (32) includes a second driving body (321) and a second driving shaft (322). The second driving body (321) is installed in the mounting groove (1131), and the second driving shaft (322) extends out of the mounting groove (1131) and is connected to the second connecting rib (212) in a transmission manner.

5. The projection structure according to claim 4, characterized in that, The first bracket (11) further includes a first connecting rib (112) assembled on the mounting part (113), and a limiting groove is formed on the frame (40); The first driving component (31) includes a first driving body (311) and a first driving shaft (312). The first driving body (311) is located within the limiting groove, and the first driving shaft (312) extends out of the limiting groove and is connected to the first connecting rib (112) in a transmission manner.

6. The projection structure according to any one of claims 1 to 5, characterized in that, It also includes an image acquisition unit (60) mounted on the frame (40). The light source (50), the image acquisition unit (60), the first driving unit (31) and the second driving unit (32) are all electrically connected to the controller. The image acquisition unit (60) is used to acquire a light spot image. The controller is used to obtain the light spot area and the light spot contrast based on the light spot image.

7. A dishwasher, characterized in that, Includes the projection structure as described in any one of claims 1 to 6 above.

8. The dishwasher according to claim 7, characterized in that, It also includes a controller and a main structure. The projection structure and the controller are both disposed on the main structure. The projection structure also includes an image acquisition device (60). The controller is electrically connected to the light source (50), the image acquisition device (60), the first driving device (31), and the second driving device (32).

9. A method for controlling a dishwasher, characterized in that, Includes the following steps: The light source (50) is controlled to project light onto the receiving surface and form a light spot on the receiving surface; The first driving unit (31) drives the first mirror group (10) to move the second mirror group (20) synchronously along the first direction (X) or the second direction (Y) until the area of ​​the light spot is the preset area; The second driving unit (32) is controlled to drive the second mirror group (20) to move relative to the first mirror group (10) along the first direction (X) or the second direction (Y) until the light spot contrast is the preset contrast. Wherein, the first direction (X) is opposite to the second direction (Y).

10. The control method for a dishwasher according to claim 9, characterized in that, It also includes the following steps: The image acquisition unit (60) is controlled to acquire a spot image, and the spot area and spot contrast are obtained based on the spot image.

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