Oblique projection display device used in household electrical appliance

Abstract

The utility model relates to the technical field of projection display, and discloses an oblique projection display device for household appliances, which comprises a shell, an optical support and a control PCB (printed circuit board), the optical support is mounted at the top of the control PCB through a mounting column, and an LED (light-emitting diode) lamp panel, a condensing lens, a space ring and an imaging lens are sequentially and vertically inserted into the inner side of the optical support. According to the utility model, the upper cover and the lower cover are embedded and installed to form the housing, a closed cavity is formed, all optical members are assembled and limited through the optical support, and the front reflector arranged on the slope surface is matched with the light outlet hole and the optical transparent sheet, so that the assembly precision and the projection effect are ensured; the problem of optical shielding is solved in an oblique projection mode, the installation limitation of the projection module in a household appliance product can be greatly reduced, and development and design of various projection function modules can be rapidly achieved by replacing the display device at the position of the space ring.

Description

Technical Field

[0001] This utility model relates to the field of projection display technology, specifically to a slant projection display device for use in household appliances. Background Technology

[0002] With social development, the functions of home appliances are becoming more and more diverse, and projection technology is being used more and more in home appliances.

[0003] Existing projection products require separate designs for each projection format, making it impossible to achieve a unified overall architecture. Furthermore, current conventional projectors are all vertical projections, which impose many restrictions on installation location and method, and the position of the projected image is also quite limited. In addition, installation and development of multiple specifications are quite complex. Different display formats of various projection products require the entire solution to be redesigned, making it impossible to achieve compatibility. Moreover, the internal architecture design of projectors is complex, and the combination of various structural components with different precision cannot take cost into account.

[0004] This application provides a slanted projection display device for use in household appliances, which can effectively solve the contradiction between the projection installation position and the image display position, and can realize multiple optical projections under the same architecture. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a slanted projection display device for use in household appliances.

[0006] This utility model is achieved by the following technical solution: a slanted projection display device used in home appliances, including a shell, an optical bracket and a control PCB board. The bottom of the optical bracket is integrally formed with multiple sets of mounting posts. The optical bracket is mounted on the top of the control PCB board through the mounting posts. An LED light board, a condenser lens, a spacer and an imaging lens are vertically inserted into the inner side of the optical bracket in sequence.

[0007] In this configuration, the LEDs on the LED light board are aligned with the centers of the focusing lens and the imaging lens. A front reflector is snapped onto the slope of the optical bracket near the imaging lens, and the front reflector forms a certain angle with the light output direction of the imaging lens.

[0008] Preferably, the LED light board is composed of LEDs mounted on the light board in the form of surface mount or plug-in, and the spacer is used to mount display devices. Film, segment code screen or liquid crystal screen is mounted through the spacer, and the LED light board and the display devices on the spacer are electrically connected to the control PCB board.

[0009] Preferably, the condenser lens is aligned with the axis of the imaging lens, and a light-emitting hole is provided on the bottom surface of the optical support near the imaging lens.

[0010] Preferably, the top interface of the control PCB board is provided with a connecting line, and the control PCB board is provided with corresponding mounting holes for mounting the optical bracket with the mounting post.

[0011] Preferably, the outer shell includes an upper cover and a lower cover, and the bottom wall of the inner cavity of the lower cover is integrally formed with a slot, through which the control PCB board and the optical bracket are installed in the inner cavity of the lower cover.

[0012] Preferably, the bottom wall of the inner cavity of the lower cover has a through hole, and an optical transparent sheet is installed on the bottom wall of the inner cavity of the lower cover through the through hole, and the optical transparent sheet is arranged in a corresponding manner with the light-emitting hole.

[0013] Preferably, the upper cover and lower cover of the outer shell are fitted together, and a fixing plate is integrally formed on one side of the outer wall of the upper cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model achieves oblique projection of simple patterns, complex graphics, and dynamic patterns under a designed optical architecture. The upper and lower covers are designed to fit together to form a shell, creating a closed cavity. An optical bracket is used to assemble and constrain all optical components. The front reflector with a sloping surface, along with the light-emitting hole and the optical transparent sheet, ensures assembly accuracy and projection effect. The oblique projection method solves the problem of optical obstruction, which can significantly reduce the installation restrictions of the projection module in home appliances and improve the practicality of the projection product. Furthermore, the optical transparent sheet is fixed with glue or a sealing ring to ensure the sealing and waterproof effect of the entire shell. The shell opening and the addition of a transparent optical sheet solve the difficulty of balancing projection light emission and waterproofing.

[0016] 2. By replacing the display device at the spacer position, this utility model can quickly realize the development and design of various projection function modules. For example, simple graphics can be realized by using a plastic sheet with designed holes, complex high-precision patterns can be realized by using film, and dynamic icons and numbers can be displayed by using a segment screen. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the outer shell structure of this utility model.

[0019] In the diagram: 1. Outer shell; 101. Top cover; 102. Bottom cover; 2. Optical bracket; 3. Control PCB board; 4. Connecting wire; 5. LED light board; 6. Condensing lens; 7. Spacer ring; 8. Imaging lens; 9. Front reflector; 10. Light outlet hole; 11. Optical transparent sheet; 12. Fixing plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] Please see Figures 1-2 This embodiment of an oblique projection display device for use in household appliances includes a housing 1, an optical bracket 2, and a control PCB board 3. The housing 1 includes an upper cover 101 and a lower cover 102, which are used to house the optical and electrical parts of the projection module and to adapt to the main body of the household appliance as an assembly structure. A fixing plate 12 is integrally formed on one side of the outer wall of the upper cover 101. The fixing plate 12 is fixed to the designated position of the main body of the household appliance by means of buckles or screws. The upper cover 101 and the lower cover 102 are fitted together to form a closed cavity. Glue can be injected into the cavity to ensure the sealing of the entire module. A slot is integrally formed on the bottom wall of the inner cavity of the lower cover 102. The control PCB board 3 and the optical bracket 2 are installed in the inner cavity of the lower cover 102 through the slot. This can waterproof the control PCB board 3 and the corresponding optical components inside, prevent moisture from entering the product in a high temperature and humidity environment, and improve the service life of the overall oblique projection display device.

[0022] Furthermore, the bottom of the optical bracket 2 is integrally formed with multiple sets of mounting posts, and the control PCB board 3 is provided with corresponding mounting holes for mounting the optical bracket 2 with the mounting posts. The top interface position of the control PCB board 3 is provided with a connecting wire 4. The inner side of the optical bracket 2 is vertically inserted with an LED light board 5, a condenser lens 6, a spacer 7 and an imaging lens 8. The control PCB board 3 is a circuit board containing electronic components to control the operation of the LED light board 5 and the spacer 7, and to communicate with the home appliance control motherboard. The connecting wire 4 is soldered to the interface position on the control PCB board 3 for connecting with the home appliance control motherboard, providing power to the projection module and providing communication signals to control the operation of the projection module.

[0023] Furthermore, the optical bracket 2 is the core of the entire projection product. The optical bracket 2 adopts a high-precision injection molding process. The LED lamp board 5, condenser lens 6, spacer 7, imaging lens 8, and front reflector 9 are fixedly installed on the optical bracket 2 according to the design requirements to accurately determine and constrain the position of each optical component and ensure the projection imaging effect. Among them, the LEDs are installed on the lamp board in the form of patches or plug-ins to form the LED lamp board 5. The LEDs on the LED lamp board 5 are aligned with the center of the condenser lens 6 and the imaging lens 8, and the axis of the condenser lens 6 is aligned with the axis of the imaging lens 8.

[0024] Furthermore, the spacer 7 is used to assemble display devices. Segment screens, LCD screens, or film with patterns are assembled through the spacer 7. The LED light board 5 and the display devices on the spacer 7 are electrically connected to the control PCB board 3 to control the switching of light, color, and the content of the image display. After installation, the LEDs on the LED light board 5 will be aligned with the center of the optical lens, and the light emission direction will be perpendicular to the optical projection.

[0025] Furthermore, a front reflector 9 is movably mounted on the slope of the optical bracket 2 near the imaging lens 8. The front reflector 9 uses a front-coated lens, that is, the reflective layer is coated on the front of the lens. This can improve the light reflectivity and avoid the appearance of virtual images. The front reflector 9 and the light output direction of the imaging lens 8 are at a certain angle. Adjusting this angle can adjust the angle and position of the obliquely projected pattern.

[0026] Furthermore, a light-emitting hole 10 is provided on the bottom surface of the optical bracket 2 near the imaging lens 8, and a through hole is provided on the bottom wall of the inner cavity of the lower cover 102. An optical transparent sheet 11 is installed on the bottom wall of the inner cavity of the lower cover 102 through the through hole. The optical transparent sheet 11 is assembled on the lower cover 102 at a position corresponding to the light-emitting hole 10, and is fixed by glue or sealing ring pressing to ensure the sealing and waterproof effect of the entire shell 1. The optical transparent sheet 11 is selected with a certain hardness and strength. It is transparent and can transmit the projected light. It is also relatively thin and has a low surface reflectivity, which can ensure that the projected light will not affect the optical performance when it passes through.

[0027] Working principle: When the LED light panel 5 emits light, the center of the light is perpendicular to the condenser lens 6 and the imaging lens 8. The light is focused by the condenser lens 6, and the focused light source outputs light with pattern information through the display device at the spacer 7, displaying the projected image. The projection is magnified by the imaging lens 8, and the direction of the light is changed by the front reflector 9. Finally, the projection is displayed on the designated plane by oblique projection through the light outlet 10 and the optical transparent sheet 11. Furthermore, by changing the display device at the spacer 7, the development and design of various projection function modules can be quickly realized. For example, simple graphics can be realized by using a plastic sheet with designed holes, complex high-precision patterns can be realized by using film, and dynamic icons and numbers can be displayed by using a segment screen or LCD screen.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A tilting projection display device for use in household appliances, comprising a housing (1), an optical bracket (2), and a control PCB board (3), characterized in that, The bottom of the optical bracket (2) is integrally formed with multiple sets of mounting posts. The optical bracket (2) is mounted on the top of the control PCB board (3) through the mounting posts. The inner side of the optical bracket (2) is vertically inserted with an LED light board (5), a condenser lens (6), a spacer (7) and an imaging lens (8). Among them, the LED on the LED light panel (5) is aligned with the center of the focusing lens (6) and the imaging lens (8). A front reflector (9) is movably snapped onto the slope of the optical bracket (2) near the imaging lens (8). The front reflector (9) and the light output direction of the imaging lens (8) are at a certain angle.

2. The oblique projection display device for use in household appliances according to claim 1, characterized in that, The LED light board (5) is composed of LEDs mounted on the light board in the form of patches or plug-ins. The spacer (7) is used to assemble display devices. Film, segment code screen or liquid crystal screen is assembled through the spacer (7). The LED light board (5) and the display devices on the spacer (7) are electrically connected to the control PCB board (3).

3. A slanted projection display device for use in household appliances according to claim 1, characterized in that, The condenser lens (6) is aligned with the axis of the imaging lens (8), and a light-emitting hole (10) is provided on the bottom surface of the optical support (2) near the imaging lens (8).

4. A slanted projection display device for use in household appliances according to claim 1, characterized in that, The top interface of the control PCB board (3) is provided with a connecting line (4), and the control PCB board (3) is provided with a corresponding mounting hole for mounting the optical bracket (2) with the mounting column.

5. A tilting projection display device for use in household appliances according to claim 1, characterized in that, The outer shell (1) includes an upper cover (101) and a lower cover (102). The inner cavity bottom wall of the lower cover (102) is integrally formed with a slot. The control PCB board (3) and the optical bracket (2) are installed in the inner cavity of the lower cover (102) through the slot.

6. A slanted projection display device for use in household appliances according to claim 5, characterized in that, The bottom wall of the inner cavity of the lower cover (102) is provided with a through hole, and an optical transparent sheet (11) is installed on the bottom wall of the inner cavity of the lower cover (102) through the through hole, and the optical transparent sheet (11) is arranged in a corresponding manner with the light outlet hole (10).

7. A slanted projection display device for use in household appliances according to claim 1, characterized in that, The upper cover (101) and lower cover (102) of the outer shell (1) are fitted together and installed. A fixing plate (12) is integrally formed on one side of the outer wall of the upper cover (101).

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