Projection lens mounting seat

Abstract

The utility model relates to the technical field of display, in particular to a projection lens mounting seat, a shell is arranged in the projection lens mounting seat and comprises a hollow cavity, a first light hole and a second light hole, one end of the first light hole corresponds to a display source, the other end of the first light hole corresponds to a light inlet end of a projection lens, and the other end of the second light hole corresponds to a light outlet end of the projection lens. In addition, a focusing assembly is arranged in the projection lens mounting base and comprises a gasket, the gasket is located at the bottom end of the shell or the top end of the cavity, the thickness of the gasket is matched with the focal length to be adjusted of the projection lens, and therefore the projection lens can be adjusted conveniently. When the focal length of the projection lens does not meet the projection requirement, the gasket with the thickness matched with that of the required focal length of the projection lens is replaced to adjust the focal length of the projection lens.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a projection lens mounting base. Background Technology

[0002] An LED direct-view projection display screen mainly consists of a display source, a projection lens, and a screen. The display source emits light and forms an image, the projection lens magnifies the image formed by the display source, and the screen displays the magnified image. The driving unit controls the working state of the display source. During display, the magnified images projected onto the screen are stitched together to obtain a complete display image.

[0003] In the assembly process of the aforementioned LED direct-view projection display, a lens mount is often used to install the projection lens and the display source accordingly. Currently, the projection lenses used in LED direct-view projection displays are fixed-focus lenses. During the splicing process, especially in the design and experimental stage, in order to obtain a clear display image, the projection lens needs to be focused. However, the existing projection lens mount lacks a focusing component, making its application extremely inconvenient. Summary of the Invention

[0004] To address the technical problem that existing lens mounts are not convenient for adjusting the focal length of projection lenses, this application provides a projection lens mount that can mount the projection lens to the display source and simultaneously adjust the focal length of the projection lens.

[0005] The technical solution adopted in this application is as follows:

[0006] A projection lens mounting base is used in an LED direct-view projection display screen, the LED direct-view projection display screen including a display source and a projection lens. The display source is used to emit light and form an image, and the projection lens is used to magnify the image formed by the display source to form a magnified image. The projection lens mounting base is used to install the projection lens correspondingly to the display source. The projection lens mounting base is characterized by comprising:

[0007] The housing includes a hollow cavity, a first light-transmitting area at the bottom of the cavity, and a second light-transmitting area at the top of the cavity. The cavity is used to house the projection lens. One end of the first light-transmitting area corresponds to the display source, and the other end corresponds to the light-incident end of the projection lens. The light-exit end of the projection lens corresponds to the second light-transmitting area.

[0008] A focusing assembly includes a shim, which is mounted at the bottom end of the housing or at the bottom end of the cavity, and the thickness of the shim matches the focal length to be adjusted of the projection lens.

[0009] Its further feature is that,

[0010] The projection lens mounting base also includes a support plate, which is used to support the display source, the housing, and the projection lens. The focusing assembly also includes an adjusting bolt, which is used to lock the housing to the support plate.

[0011] Furthermore, the adjusting bolts include at least three, the bearing plate has a first threaded hole, the bottom of the housing has a second threaded hole, the first threaded hole corresponds to the second threaded hole, and the adjusting bolts pass through the first threaded hole and the second threaded hole to lock the bearing plate and the housing.

[0012] Furthermore, the LED direct projection display screen also includes a substrate, in which a seventh threaded hole is formed. The adjusting bolt passes through the first threaded hole, the second threaded hole, and the seventh threaded hole in sequence to lock the support plate, the housing, and the substrate together.

[0013] Furthermore, the length of the support plate is greater than the length of the shell, and both ends of the support plate protrude horizontally outward from the bottom sides of the shell, forming protrusions.

[0014] Furthermore, the LED direct projection display screen also includes a substrate, in which a fourth threaded hole is formed, and a third threaded hole is formed on the protrusion of the support plate. The third threaded hole corresponds to the fourth threaded hole in the substrate, and a first bolt passes through the third threaded hole and the fourth threaded hole to connect the support plate to the substrate.

[0015] Furthermore, the display source includes an LED integrated chip, which is electrically connected to an external driving unit via an FPC connection line. A mounting groove is provided in the middle of the carrier plate, and a first notch is provided on one side of the mounting groove. The opening direction of the first notch is consistent with the routing direction of the FPC connection line, and the first notch is used to accommodate the FPC connection line.

[0016] Furthermore, the housing is U-shaped, including a horizontal plate and vertical plates extending vertically upward from the top ends of both sides of the horizontal plate.

[0017] Furthermore, the housing includes a horizontal plate and a vertical plate extending vertically upward from the top of the four edges of the horizontal plate.

[0018] Furthermore, a second notch is provided at the bottom of the vertical plate above the first notch, and the bottom end of the second notch penetrates the horizontal plate.

[0019] Furthermore, the display source also includes a filter covering the light-emitting surface of the LED integrated chip, the filter being used to convert the light emitted by the LED integrated chip into at least three primary colors: red, green, and blue, corresponding to the red light region, green light region, and blue light region, respectively.

[0020] Furthermore, the projection lens is mounted in the cavity via a support plate. The edge of the support plate has a fifth threaded hole, and the edge of the housing has a sixth threaded hole. The fifth threaded hole and the sixth threaded hole correspond to each other. A second bolt passes through the fifth threaded hole and the sixth threaded hole to connect the support plate to the housing.

[0021] The above-described solution of this utility model achieves the following beneficial effects: The projection lens mounting base of this application includes a housing, comprising a hollow cavity, a first light-transmitting area, and a second light-transmitting area. One end of the first light-transmitting area corresponds to the display source, and the other end corresponds to the light-incident end of the projection lens. The light-exit end of the projection lens corresponds to the second light-transmitting area. This projection lens mounting base facilitates the corresponding installation of the projection lens and the display source. Furthermore, the projection lens mounting base includes a focusing component, which includes a shim located at the bottom of the housing or the top of the cavity. The shim's thickness matches the focal length of the projection lens to be adjusted. When the focal length of the projection lens does not meet the projection requirements, replacing the shim with one of matching thickness to the required focal length achieves focal length adjustment. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of an existing projection lens mount;

[0023] Figure 2 This is a three-dimensional structural diagram of the projection lens mounting bracket of this application mounted on the support plate;

[0024] Figure 3 This is a three-dimensional structural diagram of the housing in the projection lens mounting bracket of this application;

[0025] Figure 4 This is a three-dimensional structural diagram of the housing in the projection lens mount of this application from another angle;

[0026] Figure 5 This is a three-dimensional structural diagram of the support plate of this application;

[0027] Figure 6 This is a top-view structural diagram of the projection lens;

[0028] Figure 7 This is a schematic diagram of the main view structure of the projection lens;

[0029] Figure 8 A schematic diagram of the main structure of the LED display module formed by mounting the projection lens mount on the carrier plate;

[0030] Figure 9 A three-dimensional structural diagram of the LED display module formed by mounting the projection lens mount on the carrier plate;

[0031] Figure 10 A schematic diagram of the three-dimensional structure of the LED display module array arranged on the substrate after the projection lens mounting bracket is installed on the carrier plate;

[0032] Figure 11 This is a three-dimensional structural schematic diagram of another embodiment of the projection lens mounting housing and gasket of this application.

[0033] Reference numerals: 1. Display source; 2. Projection lens; 3. Substrate; 4. Projection lens mount; 5. Support plate; 6. FPC connection cable;

[0034] Support plate 201, fifth threaded hole 203, light inlet end 204, light outlet end 205;

[0035] Housing 401, first light-transmitting area 402, second light-transmitting area 403, gasket 404, second notch 405, second threaded hole 407, third threaded hole 408, sixth threaded hole 409;

[0036] Mounting slot 501, first notch 502, first threaded hole 503. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0038] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0039] The LED direct-view projection display screen mainly includes a display source 1, a projection lens 2, and a screen (not shown in the figure). The display source 1 is used to emit light and form an image, the projection lens 2 is used to magnify the image formed by the display source 1 to form a magnified image, and the screen is used to display the magnified image. In this embodiment, the display source 1 includes an LED integrated chip and a filter covering the light-emitting surface of the LED integrated chip. The LED integrated chip emits blue light, and the filter contains quantum dot material and has a light color conversion function to convert blue light into light of at least three primary colors: red light, green light, and blue light, forming red light areas, green light areas, and blue light areas. The red, green, and blue light colors are mixed to form color or white. In the design and experimental stage of this application, the projection lens used is the main camera of the Xiaomi 10 Pro, with a focal length of 25 mm and a pixel count of 108 million.

[0040] During display, the driving unit (e.g., driving IC) controls the LED integrated chip in the display source 1 to emit light and form an image. This image is magnified by the projection lens 2 to form a magnified image. The magnified image is projected onto the screen and stitched together on the screen to obtain a complete display image.

[0041] To facilitate the assembly of the LED direct-view projection display screen, the projection lens 2 and the display source 1 can be integrated into the same module to form an LED display module. The LED display module array is distributed on the substrate 3, and the magnified image projected onto the screen is stitched together. When the projection lens 2 and the display source 1 are integrated, they are installed correspondingly to the display source 1 through the lens mounting bracket 4.

[0042] Figure 1 An existing projection lens mount 4 is provided, which includes a housing 401 and a projection lens 2 embedded in the housing. To facilitate the light input and output of the projection lens 2, a first light-transmitting area 402 and a second light-transmitting area 403 are respectively opened at the bottom and top of the housing 401. The image emitted by the display source 1 passes through the first light-transmitting area 402, the projection lens 2, and the second light-transmitting area 403 in sequence and is projected onto the screen. However, the projection lens 2 commonly used in LED direct-view projection displays is a fixed-focus lens. During the splicing process, especially in the design and experimental stage, the projection lens 2 needs to be focused in order to obtain a clear display image. However, the existing projection lens mount 4 lacks a focusing component, which makes its application extremely inconvenient.

[0043] To address the technical problem in the existing technology where the projection lens mount 2 lacks a focusing component, making it inconvenient to assemble an LED direct-view projection display, the following is a specific embodiment of the projection lens mount.

[0044] The projection lens mounting base 4 includes a housing 401 and a focusing assembly. The housing 401 includes a hollow cavity, a first light-transmitting area 402 located at the bottom of the cavity, and a second light-transmitting area 403 located at the top of the cavity. The cavity is used to house the projection lens 2. The light-incident end 204 of the projection lens 2 corresponds to the first light-transmitting area 402, and the light-exit end 205 of the projection lens 2 corresponds to the second light-transmitting area 403. The image formed by the light emitted from the display source 1 is projected onto the screen sequentially through the first light-transmitting area 402, the projection lens 2, and the second light-transmitting area 403.

[0045] In this embodiment, the shell 401 is U-shaped, including a horizontal plate and vertical plates extending vertically upward from the top of both sides of the horizontal plate. The horizontal plate and the vertical plate enclose each other to form a hollow cavity.

[0046] It should be noted that, in another embodiment, the housing 401 includes a horizontal plate and a vertical plate extending vertically upward from the top of the four sides of the horizontal plate. The horizontal plate and the vertical plate enclose each other to form a hollow cavity.

[0047] The focusing assembly includes a shim 404, which is located between the housing 401 and the support plate 5. The thickness of the shim 404 matches the focal length to be adjusted of the projection lens 2. The support plate 5 supports the housing 401, the projection lens 2, and the display source 1. In this embodiment, the projection lens 2 is mounted on the support plate 5 via the lens mounting bracket 4, which facilitates the integration of the projection lens 2 and the display source 1 into the same module. The LED display module array is distributed on the substrate 3.

[0048] It should be noted that, in another embodiment, the gasket 404 is installed at the top of the cavity in the housing 401, and the shape of the gasket 404 is consistent with the shape of the bottom of the cavity. A first through hole is provided in the middle of the gasket 404 to facilitate light transmission and installation of the projection lens. (Refer to...) Figure 11 The thickness of the 404 shim matches the focal length to be adjusted for the projection lens 2. When the focal length of the projection lens does not meet the projection requirements, the shim with a thickness matching the required focal length can be replaced to achieve focal length adjustment. Both the shim and the projection lens can be fixed using adhesive.

[0049] The LED integrated chip is electrically connected to the driving circuit in the PCB board via the FPC connection line 6. In this embodiment, to facilitate the mounting of the LED integrated chip on the carrier plate 5, the carrier plate 5 is configured as follows: a mounting groove 501 is opened in the middle of the carrier plate 5, and the size of the mounting groove 501 matches the size of the display source 1 (i.e., the LED integrated chip) so as to facilitate the alignment and mounting of the LED integrated chip in the mounting groove 501. A first notch 502 is opened on one side of the mounting groove 501, and the width of the first notch 502 matches the width of the FPC connection line 6. The first notch 502 is set for the routing of the FPC connection line 6. The FPC connection line 6 passes through the first notch 502, with one end electrically connected to the LED integrated chip and the other end used for electrical connection to the driving circuit.

[0050] In addition, to facilitate the routing of the FPC connection line 6, a second notch 405 is opened at the bottom of the vertical plate above the first notch 502. The bottom end of the second notch 405 passes through the horizontal plate and corresponds to the first notch 502.

[0051] It should be noted that, in another embodiment, the projection lens 2 can be directly mounted on the substrate 3 via the lens mounting bracket 4. The substrate 3 is a PCB board or a large-sized carrier board. First, the LED integrated chip is directly mounted on the substrate 3 in an array structure, and then the projection lens 2 is correspondingly mounted on the substrate 3 via the lens mounting bracket 4.

[0052] To facilitate locking the housing 401 to the support plate 5, in this embodiment, the focusing assembly also includes adjusting bolts. There are four adjusting bolts arranged in a rectangular pattern. The support plate 5 has a first threaded hole 503, and the bottom of the housing 401 has a second threaded hole 407. The first threaded hole 503 and the second threaded hole 407 correspond to each other. Based on the required focal length of the projection lens, a shim 404 of appropriate thickness is placed between the housing 401 and the support plate 5. The adjusting bolts then pass through the first threaded hole 503 and the second threaded hole 407 to lock the support plate 5 to the housing 401.

[0053] The support plate 5 facilitates the integration of the display source 1 and the projection lens 2. Furthermore, the lens mounting bracket 4 facilitates the corresponding installation of the projection lens 2 and the display source 1, forming an LED display module. The LED display module array is distributed on the substrate 3, and the display source 1 and the projection lens 2 are mounted on the substrate 3 via the support plate 5. The length of the support plate 5 is greater than the length of the housing 401; that is, both ends of the support plate 5 protrude horizontally outwards from the bottom sides of the housing 401, forming protrusions. A third threaded hole 408 is provided on the protrusion, corresponding to a fourth threaded hole in the substrate 3. A first bolt passes through the third threaded hole 408 and the fourth threaded hole, connecting the support plate 5 to the substrate 3.

[0054] It should be noted that, in another embodiment, the length of the support plate 5 can be the same as the length of the housing 401. A seventh threaded hole is provided in the base plate (3). The adjusting bolt passes through the first threaded hole, the second threaded hole and the seventh threaded hole in sequence to lock the support plate (5), the housing (401) and the base plate (3).

[0055] The projection lens 2 is installed in the cavity via the support plate 201. Both ends of the projection lens 2 pass through the support plate 201. The edge of the support plate 201 is provided with a fifth threaded hole 203. The housing 401 at the bottom of the cavity is provided with a sixth threaded hole 409. The fifth threaded hole 203 corresponds to the sixth threaded hole 409. The second bolt passes through the fifth threaded hole 203 and the sixth threaded hole 409 to install the support plate 201 and the projection lens 2 in the cavity.

[0056] The lens mounting base 4 of this application is applied to an LED direct-view projection display screen. The steps of assembling the LED direct-view projection display screen include: S1, preparing an LED display module, specifically, S11, mounting an LED integrated chip in the mounting groove of the carrier plate 5, with the FPC connection line 6 on one side of the LED integrated chip corresponding to the first notch 502;

[0057] S12. Place the projection lens 2 in the cavity, and use the second bolt to pass through the fifth threaded hole 203 and the sixth threaded hole 409 to fix the projection lens 2 to the housing 401.

[0058] S13. Install the housing 401, which carries the projection lens 2, into the support plate 5 after step S11: The light-incident end 204 of the projection lens 2 corresponds to the light-emitting surface of the LED integrated chip. During this process, according to the required focal length of the projection lens 2, place a spacer 404 of appropriate thickness between the housing 401 and the support plate 5. Spacers 404 of different thicknesses are prepared in advance, and the spacer material is acrylic sheet, acetal sheet, metal sheet, etc. The focal length of the projection lens 2 is 1mm~30mm, and the thickness of the spacer 404 includes, but is not limited to, 0.5mm, 1mm, 1.5mm, and 2mm. The required focal length of the projection lens 2 is set according to the display clarity of the magnified image on the screen.

[0059] S14. The adjusting bolt passes through the first threaded hole 503 and the second threaded hole 407 to lock the bearing plate 5 and the housing 401, thereby obtaining the LED display module.

[0060] S2. Distribute the LED display module array on the substrate 3. This process can be achieved based on the existing splicing device. After the position adjustment of an LED display module is completed, the first bolt passes through the third threaded hole 408 and the fourth threaded hole 301 to connect the carrier plate 5 to the substrate 3.

[0061] By using the projection lens mounting bracket 4 of this application, it is possible to realize the corresponding installation of the projection lens 2 and the display source 1, and also to adjust the focal length of the projection lens 2, thereby improving the assembly convenience of the LED direct-view projection display screen.

[0062] It is understood that the above detailed description of this utility model is for illustrative purposes only and is not intended to limit the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effects; as long as the usage requirements are met, they are all within the protection scope of this utility model.

Claims

1. A projection lens mount applied to an LED direct projection display screen, the LED direct projection display screen comprising a display source (1) and a projection lens (2), the display source (1) being used for emitting light and forming an image, the projection lens (2) being used for enlarging the image formed by the display source (1) to form an enlarged image, the projection lens mount being used for mounting the projection lens (2) corresponding to the display source (1), characterized in that, The projection lens mount comprises: a shell (401) comprising a hollow cavity, a first light transmission area (402) at the bottom end of the cavity, and a second light transmission area (403) at the top end of the cavity, the cavity being used for accommodating the projection lens (2), one end of the first light transmission area (402) corresponding to the display source (1) and the other end corresponding to the light entrance end of the projection lens (2), the light exit end of the projection lens (2) corresponding to the second light transmission area (403); a focusing assembly comprising a gasket (404) mounted at the bottom end of the shell (401) or mounted at the bottom end of the cavity, the thickness of the gasket (404) matching the focal length to be adjusted of the projection lens (2).

2. The projection lens mount of claim 1, wherein The projection lens mount further comprises a bearing plate (5) for bearing the display source (1), the shell (401), and the projection lens (2), and the focusing assembly further comprises an adjusting bolt for locking the shell (401) and the bearing plate (5).

3. The projection lens mount of claim 2, wherein The adjusting bolt comprises at least three, a first threaded hole is formed in the bearing plate (5), a second threaded hole (407) is formed in the bottom of the shell, the first threaded hole corresponds to the second threaded hole (407), and the adjusting bolt penetrates through the first threaded hole and the second threaded hole (407) to lock the bearing plate (5) and the shell (401).

4. The projection lens mount of claim 3, wherein The LED direct display projection screen further comprises a substrate (3), a seventh threaded hole is formed in the substrate (3), and the adjusting bolt penetrates through the first threaded hole, the second threaded hole (407), and the seventh threaded hole in sequence to lock the bearing plate (5), the shell (401), and the substrate.

5. The projection lens mount of claim 3, wherein The LED direct display projection screen further comprises a substrate (3), a fourth threaded hole is formed in the substrate (3), the length of the bearing plate (5) is greater than the length of the shell (401), both ends of the bearing plate (5) are horizontally outward and protrude from the bottom ends of both sides of the shell (401) to form a protruding portion, a third threaded hole (408) is formed in the protruding portion, the third threaded hole (408) corresponds to the fourth threaded hole in the substrate (3), and a first bolt penetrates through the third threaded hole (408) and the fourth threaded hole to connect the bearing plate (5) and the substrate (3).

6. The projection lens mount according to claim 4 or 5, characterized in that The display source (1) comprises an LED integrated chip, the LED integrated chip is electrically connected to an external driving unit through an FPC connecting line (6), a mounting groove (501) is formed in the middle of the bearing plate (5), a first notch (502) is formed in one side edge of the mounting groove (501), the opening direction of the first notch (502) is consistent with the wiring direction of the FPC connecting line (6), and the first notch (502) is used for accommodating the FPC connecting line (6).

7. The projection lens mount of claim 6, wherein The shell (401) is U-shaped, the shell (401) comprises a horizontal plate, vertical longitudinal plates extending upward from the top ends of the two sides of the horizontal plate, or the shell (401) comprises a horizontal plate, vertical longitudinal plates extending upward from the top ends of the four peripheral edges of the horizontal plate.

8. The projection lens mount of claim 7, wherein A second notch (405) is formed in the bottom of the longitudinal plate above the first notch (502), and the bottom end of the second notch (405) penetrates the horizontal plate.

9. The projection lens mount of claim 1, wherein The display source (1) further comprises a filter covering the light-emitting surface of the LED integrated chip, the filter being used for converting the light color emitted by the LED integrated chip into at least three primary colors: red, green and blue, corresponding to a red light region, a green light region and a blue light region respectively.

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