LED direct display projection display screen and LED display module

Abstract

The utility model relates to the technical field of display screens, in particular to an LED direct display projection display screen and an LED display module, light emitted by the same display source in the display screen comprises at least three different primary colors, and projection lenses in an optical assembly are in one-to-one correspondence with the display sources. The light colors of the same display source are mixed to form an image, so that when the LED direct-display projection display screen is assembled, the mounting angle of the projection lens does not need to be accurately controlled to coincide different primary color images, namely, the problem of high coincidence difficulty does not exist, so that the assembly difficulty is reduced, the image amplification can be realized, and the display quality is ensured at the same time; according to the LED display module, the display source and the projection lens are integrated in the same module, and during assembly, the LED display modules are distributed on the substrate in an array manner, so that the assembly difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to display screen technical field especially relates to a LED direct display projection display screen and LED display module. BACKGROUND

[0002] LED has the characteristics of large current high brightness, therefore, take LED as light source, can satisfy display screen high brightness display requirement, but present stage application LED's 100 inches above big size display screen splicing assembly, easy existence splicing seam, lead to green line, yellow line etc. Color consistency problem.

[0003] The prior art provides an LED direct display projection array light-emitting module and display screen, the light-emitting module has the characteristics of high pixel density, high light efficiency and no splicing seam, which can solve the above problems of existing LED display screens and meet the application requirements of different scenarios such as long distance, strong light environment and different size display screens. However, in the process of preparing the light-emitting module, it is found that the precision of the magnifying objective lens installation angle is not easy to control, and the images of the three integrated LED array chips are magnified, and it is difficult to realize height coincidence. SUMMARY

[0004] The utility model provides a kind of LED direct display projection display screen, it can realize image amplification, simultaneously can ensure display quality, and the technical scheme as follows is used:

[0005] A kind of LED direct display projection display screen, characterized in that it comprises:

[0006] A substrate for carrying display units, drive units, imaging units;

[0007] A plurality of display units, the display units are arrayed on the substrate, each display unit includes a display source and an optical assembly, the display source emits light containing at least three different primary colors, which is used to generate an image, and the optical assembly includes a projection lens, which corresponds to the display source one-to-one and is used for image amplification to form an enlarged image.

[0008] An imaging unit includes a screen for receiving and displaying the enlarged image.

[0009] A drive unit includes a drive IC electrically connected to the display source for controlling the working state of the display source.

[0010] When displaying, the driving IC drives the display source to work, light colors in the same display source are mixed to form an image, the image is enlarged by the projection lens and projected to the screen, and the image is displayed through the screen.

[0011] It is further characterized in that,

[0012] The same display source includes a blue light chip and a filter, the filter covers the light emitting surface of the blue light chip, and the blue light emitted by the blue light chip forms a plurality of pixels after being filtered by the filter, each pixel comprising red light, green light, and blue light, which are red light regions, green light regions, and blue light regions, respectively.

[0013] Furthermore, in each pixel, the red light regions, green light regions, and blue light regions are sequentially and spacedly distributed from left to right, or the red light regions, green light regions, and blue light regions are in a "pin" shape.

[0014] Further, the same display source includes a plurality of pixels, each pixel including one red light region, two green light regions, and one blue light region, and the red light regions, green light regions, and blue light regions are in a rectangular distribution.

[0015] Further, the projection lens is directly mounted on the substrate, or the projection lens is mounted on the substrate through a projection lens mounting seat.

[0016] Furthermore, the projection lens mounting seat includes a hollow housing, the projection lens is mounted in the housing, the top end and the bottom end of the housing are respectively provided with a first light transmission area and a second light transmission area, one side of the second light transmission area corresponds to the light emitting surface of the display source, and the other side corresponds to the light entering end of the projection lens, one side of the first light transmission area corresponds to the light emitting end of the projection lens, and the other side corresponds to the screen.

[0017] Further, the projection lens is a macro lens, the display source is located at the object end of the macro lens, the imaging unit is located at the image end of the macro lens, the image distance of the image end is greater than the object distance of the object end, and the image distance and the object distance are multiples of the focal length of the macro lens.

[0018] Further, the material of the substrate includes glass, glass fiber, or BT resin.

[0019] Further, the material of the housing includes aluminum, stainless steel, or acrylic.

[0020] An LED display module for the LED direct display projection screen, the LED display module includes a display unit, characterized in that the LED display module further includes a bearing plate, and the display unit is mounted in the substrate of the LED direct display projection screen through the bearing plate.

[0021] The LED display module further comprises a projection lens mounting seat, and the projection lens is mounted on the bearing plate through the projection lens mounting seat.

[0022] The projection lens mounting seat comprises a hollow shell, the projection lens is mounted in the shell, and the top end and the bottom end of the shell are respectively provided with a first light transmission area and a second light transmission area.

[0023] The outer edge of the bearing plate protrudes from the outer side end of the shell to form a protruding part, the protruding part is provided with a third bolt hole, the substrate is provided with a fourth bolt hole, the third bolt hole corresponds to the fourth bolt hole, and the bearing plate and the substrate are fixedly connected through bolts penetrating the third bolt hole and the fourth bolt hole.

[0024] The light emitted by the same display source in the LED direct projection display screen of the present application comprises at least three different primary colors, and the projection lens in the optical assembly corresponds to the display source one by one.

[0025] In addition, the display unit and the bearing plate are integrated in the same LED display module, and when the display unit is mounted in the LED direct projection display screen, the bearing plate is connected with the substrate, thereby improving the assembly convenience. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a schematic view of a three-dimensional structure of a projection lens mounting seat in the first embodiment of the present application;

[0027] Figure 2 FIG. 2 is a schematic view of another three-dimensional structure of the projection lens mounting seat in the first embodiment of the present application (omitting the top end of the shell);

[0028] Figure 3 FIG. 3 is a schematic view of another three-dimensional structure of the projection lens mounting seat in the first embodiment of the present application (omitting the top end of the shell);

[0029] Figure 4It is a main view structural schematic diagram of the LED direct display projection screen of the embodiment one of the present application.

[0030] Figure 5 It is a working principle diagram of the micro-lens.

[0031] Figure 6 It is an amplification principle diagram of the projection lens of the embodiment one and the embodiment two of the present application.

[0032] Figure 7 It is a top view structural schematic diagram of the light color conversion of the light emitted by the LED integrated chip of the embodiment one and the embodiment two of the present application after the light filter.

[0033] Figure 8 It is a three-dimensional structural schematic diagram of a projection lens of the embodiment two of the present application installed on the substrate through the projection lens mounting seat and the bearing plate.

[0034] Figure 9 It is a three-dimensional structural schematic diagram of the projection lens mounting seat of the embodiment two of the present application.

[0035] Figure 10 It is another three-dimensional structural schematic diagram of the projection lens mounting seat of the embodiment two of the present application (omitting the top end of the shell).

[0036] Figure 11 It is a main view structural schematic diagram of the LED direct display projection screen of the embodiment two of the present application.

[0037] Figure 12 It is a main view structural schematic diagram of the LED direct display projection screen in another embodiment of the present application.

[0038] The reference signs: display source 1, projection lens 2, driving IC 3, screen 4, substrate 5, projection lens mounting seat 6, bearing plate 7, adapter plate 8, FPC connector 10.

[0039] Light filter 100, red light area 101, green light area 102, blue light area 103.

[0040] Shell 601, first light transmission area 602, second light transmission area 603, first bolt hole 604, second bolt hole 605. DETAILED DESCRIPTION

[0041] In order to make the person in the art better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely in the following with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person in the art without creative labor should belong to the protection scope of the present application.

[0042] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification and in the claims of the present application and in the above description of the drawings are intended to cover the inclusion of not only the listed steps or units but also other steps or units not listed or inherent to the process, method, device, product or apparatus.

[0043] Two specific embodiments of the LED direct display projection screen are disclosed below: Embodiment one

[0044] Reference Figure 1 The display screen comprises a substrate 5, a display unit, a driving unit and an imaging unit, wherein the display unit comprises display sources 1 and optical components, each display source 1 in this embodiment contains three different primary colors for forming an image, and the optical components comprise a projection lens 2 and a projection lens mounting seat 6, the projection lens 2 is used for image magnification to form a magnified image, and the projection lens mounting seat 6 is used for mounting the projection lens 2 on the substrate 5, the driving unit comprises a driving IC 3, and the imaging unit comprises a screen 4 for displaying the magnified image, the display sources 1, the projection lens 2 and the screen 4 are arranged in sequence from left to right.

[0045] Each unit is described in detail below:

[0046] The same display source 1 comprises a blue light chip and a filter, in this embodiment, the blue light chip is an LED integrated chip, and the filter 100 is preferably a quantum dot film, the filter 100 is covered on the light emitting surface of the blue light chip, the blue light emitted by the blue light chip is converted into a plurality of pixels after passing through the filter, each pixel comprises red light, green light and blue light, which are respectively a red light area 101, a green light area 102 and a blue light area 103, the red light area 101, the green light area 102 and the blue light area 103 are arranged in sequence and spaced apart from left to right, and the light colors are mixed to form an image of a required color (monochrome or color).

[0047] It should be noted that the filter used by the display source 1 can be set according to actual needs during design, for example, in another embodiment, the blue light emitted by the blue light chip is converted into a plurality of pixels after passing through the filter, and each pixel comprises a red light area 101, two green light areas 102 and a blue light area 103, which are arranged in a "pin" shape, or the blue light emitted by the blue light chip is converted into a plurality of pixels after passing through the filter, and each pixel comprises one red light area 101, two green light areas 102 and one blue light area 103, which are arranged in a rectangular shape, as shown in Figure 7 .

[0048] The projection lens 2 corresponds to the display source 1 one by one, and the image formed by the display source 1 is enlarged after passing through the projection lens 2 to form an enlarged image. In the embodiment, a conventional macro lens is directly applied, and the model of the macro lens is commonly used in the industry. For example, the length and width of the display source 1 are 5.76 mm and 3.24 mm, the focal length range of the macro lens is 1 mm to 5 mm, preferably 1.5 mm, the magnification is 1 times to 5 times, preferably 5 times, and the main camera lens of Xiaomi 10 pro is applied in the trial development stage. The model and manufacturer of the macro lens are not limited in the application, and the macro lens with the same function of other manufacturers (such as O-film Technology Co., Ltd., LITE-ON Technology Corporation or Sunny Optical Technology (China) Co., Ltd.) can also be used to achieve the same function.

[0049] The macro lens is composed of multiple lenses. In general, the macro lens realizes imaging by focusing light through the lens, and the imaging law mainly depends on factors such as the shape, size and focal length of the lens. The macro lens is applied in a mobile phone. When imaging, the reference Figure 5 , the object is located at the object end, and the image sensor is located at the image end. The object distance is greater than the image distance (for example, the object distance is 2 times the focal length, and the image distance is 1 times the focal length). The light from the external object is focused on the image sensor through the lens, and then the image of the object is projected through the image sensor, so that a reduced image is obtained in the image sensor. When the macro lens is applied to the LED direct projection display screen, the display source 1 is located at the object end, and the screen 4 is located at the image end. The image distance is greater than the object distance (for example, the object distance is 1 times the focal length, and the image distance is 2 times the focal length). As shown in Figure 6 , during display, the light collection size, focal length and other parameters of the macro lens are preset. The image formed by the display source 1 is enlarged through the lens of the projection lens 2 and then projected on the larger screen 4, realizing image enlargement. The application of the projection lens 2 in the application makes the structure of the LED direct projection display module simple and easy to realize. In practical application, the macro lens can be selected according to the required magnification.

[0050] The specific structure of the projection lens mounting seat 6 includes a hollow shell 601, the projection lens 2 is embedded in the shell 601, and the top end and the bottom end of the shell 601 are respectively provided with a first light transmission area 602 and a second light transmission area 603. One side of the second light transmission area 603 corresponds to the light emitting surface of the display source 1, and the other side corresponds to the light entering end of the projection lens 2. One side of the first light transmission area 602 corresponds to the light emitting end of the projection lens 2, and the other side corresponds to the screen 4.

[0051] The projection lens mounting seat 6 is fixed to the base plate 5 by bolts. Specifically, a first bolt hole is formed in the outer edge of the projection lens mounting seat, a second bolt hole is formed in the base plate 5, and the bolts pass through the first bolt hole and the second bolt hole to fix the projection lens mounting seat 6 and the base plate 5.

[0052] The display units are installed on the front surface of the substrate 5 in an array structure. In this embodiment, the display sources 1 can be attached to the corresponding positions of the substrate 5 in an attaching manner during assembly.

[0053] The driving ICs are installed on the back surface of the substrate 5 to form the LED direct display projection display screen. The driving unit includes a connection circuit, which is distributed on the substrate 5 to form a multilayer PCB board. The driving ICs are electrically connected to the corresponding LED integrated chips through the connection circuit in the PCB board and an FPC connector (i.e., a flexible printed circuit board) to realize the control of the working state of the display sources 1.

[0054] It should be noted that in another embodiment, the display sources 1 and the projection lenses 2 can be directly installed on the substrate 5 by means of adhesion or welding, and the substrate 5 is made of glass, glass fiber or BT resin, preferably BT resin. The projection lenses 2 are arranged one by one corresponding to the display sources 1.

[0055] The driving unit is in an active driving mode, and the driving IC 3 is a CMOS chip. The driving IC 3 includes a driving positive electrode, a driving negative electrode, a power positive electrode, a power negative electrode and an image logic signal IO interface. The driving positive electrode is electrically connected to the positive electrode of the display source 1 through the connection circuit and the FPC connector 10. The driving negative electrode is electrically connected to the negative electrode of the display source 1 through the connection circuit and the FPC connector 10. The power positive electrode is connected to the positive electrode of a voltage source. The power negative electrode is connected to the negative electrode of the voltage source. The image logic signal IO interface is used to connect an image generator. When the display source 1 needs to generate an image, the image logic signal emitted by the image generator is transmitted to the driving IC 3 through the image logic signal IO interface. The driving IC 3 controls the corresponding blue light chip to load current or voltage according to the image logic signal, realizes the brightness and grayscale control of the blue light chip, and emits red light, green light and blue light after the blue light emitted by the blue light chip is converted in color by the optical filter. The red light, green light and blue light are mixed to generate a required color image. The image is enlarged by the corresponding projection lens 2 and projected to the screen 4 for splicing and displayed through the screen 4.

[0056] In the above embodiment one, the positions of the display sources 1 and the projection lenses 2 need to be accurately corrected before being installed during the assembly of the LED direct display projection display screen, which increases the assembly difficulty of the LED direct display projection display screen.

[0057] The following provides an LED display module. The application of the LED display module to the LED direct display projection display screen can solve the technical problem of the inconvenience of the assembly of the above LED direct display projection display screen.

[0058] Embodiment two

[0059] The application discloses an LED display module, which comprises a display unit and a bearing plate 7, wherein the display unit comprises display sources 1 and optical assemblies, each of the display sources 1 comprises three different primary colors in the embodiment, and the optical assemblies comprise projection lenses 2 corresponding to the display sources 1 and used for image amplification; the display sources 1 and the optical assemblies are mounted on the bearing plate 7.

[0060] The same display source 1 comprises a blue light chip and a filter, wherein the blue light chip is an LED integrated chip in the embodiment, the filter 100 comprises a quantum dot film, the filter 100 covers the light emitting surface of the blue light chip, the blue light emitted by the blue light chip is converted into a plurality of pixels by the filter 100, each pixel comprises red light, green light and blue light, which are respectively a red light area 101, a green light area 102 and a blue light area 103, and the red light area 101, the green light area 102 and the blue light area 103 are sequentially and spacedly distributed from left to right, and the light colors are mixed to form an image of a required color (monochrome or color).

[0061] It should be noted that the filter used by the display source 1 can be set according to actual requirements during design, for example, in another embodiment, the blue light emitted by the blue light chip is converted into a plurality of pixels by the filter 100, each pixel comprises one red light area 101, two green light areas 102 and one blue light area 103, and the four light emitting areas are distributed in a rectangular shape, as shown in Figure 7 .

[0062] The projection lens 2 corresponds to the display source 1, the image formed by the display source 1 is amplified after passing through the projection lens 2 to form an amplified image. In the embodiment, a micro lens is directly applied, the micro lens is of an industry general type, for example, the length and width of the display source 1 are 5.76 mm and 3.24 mm, the focal length range of the micro lens is 1 mm to 5 mm, preferably 1.5 mm, the magnification is 1 times to 5 times, preferably 5 times, a main camera lens of a Xiaomi 10 pro is applied in a trial development stage, and the application does not specifically limit the type and manufacturer of the micro lens, and the micro lens with the same function of other manufacturers can also be applied in actual application.

[0063] The micro lens is composed of a plurality of lenses, and in a normal case, the micro lens realizes imaging by focusing light rays through the lenses, and the imaging law mainly depends on factors such as the shape, size and focal length of the lenses. The micro lens is applied to a mobile phone, and when imaging, reference Figure 5, the object is located at the object end, the image sensor is located at the image end, the image distance is greater than the object distance (for example, the object distance is 2 times the focal length, and the image distance is 1 times the focal length), light from the external object is focused on the image sensor through the lens, and then the image of the object is projected out through the image sensor, so that a reduced image is obtained in the image sensor. When the macro lens is applied to the LED direct projection display screen, the display source 1 is located at the object end, the screen 4 is located at the image end, the object distance is greater than the image distance (for example, the object distance is 1 times the focal length, and the image distance is 2 times the focal length), as shown in FIG. 1, during display, the light collecting size, focal length and other parameters of the macro lens are preset, the image formed by the display source 1 is enlarged through the lens of the projection lens 2, and then projected on the screen 4 with a larger size, so that image enlargement is realized. The application of the projection lens 2 in the present application makes the structure of the LED direct projection display module simple and easy to realize. Figure 6

[0064] In the embodiment, the LED display module further includes a projection lens mounting seat 6, the projection lens mounting seat 6 is used for mounting the projection lens 2 on the bearing plate 7, and the projection lens mounting seat 6 is used for mounting the projection lens 2 on the bearing plate 7, as shown in FIG. 2. Figure 9 Figure 10 The specific structure of the projection lens mounting seat 6 includes a hollow shell 601, the projection lens 2 is embedded in the shell 601, the top end and the bottom end of the shell 601 are respectively provided with a first light transmission area 602 and a second light transmission area 603, one side of the second light transmission area 603 corresponds to the light exit surface of the display source 1, and the other side corresponds to the light entrance end of the projection lens 2, one side of the first light transmission area 602 corresponds to the light exit end of the projection lens 2, and the other side corresponds to the screen 4.

[0065] It should be noted that in another embodiment, the projection lens 2 can be directly mounted on the bearing plate 7 by pasting.

[0066] During assembly, first, the display source is mounted in the bearing plate 7, the projection lens 2 is embedded in the projection lens mounting seat 6, and then the projection lens mounting seat 6 and the projection lens 2 are mounted on the bearing plate. In the embodiment, the projection lens mounting seat 6 is fixed on the bearing plate 7 by bolts, specifically, a first bolt hole 604 is formed in the outer edge of the projection lens mounting seat 6, a second bolt hole 605 is formed in the bearing plate 7, and the projection lens mounting seat 6 and the bearing plate 7 are fixed by the bolts penetrating through the first bolt hole 604 and the second bolt hole 605. According to the magnifying imaging principle of the macro lens 2, the relative position of the projection lens 2 and the display source 1 is determined, so that the LED display module is obtained.

[0067] The above LED display module is applied to the LED direct projection display screen, the LED direct projection display screen includes a driving unit and an imaging unit, the driving unit includes a driving IC 3, the imaging unit includes the screen 4, the screen 4 is used for displaying an enlarged image, and the display source 1, the projection lens 2 and the screen 4 are sequentially arranged from left to right. ​​

[0068] The driving unit is in an active driving mode, the driving IC 3 is a CMOS chip, and the driving IC 3 includes a driving positive electrode, a driving negative electrode, a power positive electrode, a power negative electrode, and an image logic signal IO interface. The driving positive electrode is electrically connected to the positive electrode of the LED integrated chip through a connecting circuit and the FPC connector 10, the driving negative electrode is electrically connected to the negative electrode of the LED integrated chip through a connecting circuit and the FPC connector 10, the power positive electrode is connected to the positive electrode of a voltage source, the power negative electrode is connected to the negative electrode of the voltage source, and the image logic signal IO interface is used to connect an image generator. When the display source 1 needs to generate an image, the image logic signal emitted by the image generator is transmitted to the driving IC 3 through the image logic signal IO interface, and the driving IC 3 controls the corresponding blue light chip to load current or voltage according to the image logic signal, so as to control the brightness and the grayscale of the blue light chip. The blue light emitted by the blue light chip is converted into red light, green light and blue light through the optical filter, the red light, the green light and the blue light are mixed to generate a color image, and the image is enlarged by the corresponding projection lens 2 and projected onto the screen. The images are spliced on the screen and displayed through the screen.

[0069] When the LED direct display projection display screen is assembled, the LED display module is arranged in an array structure on the substrate 5, the bearing plate 7 is fixed to the substrate 5 by bolts, and the substrate 5 is fixed to the bearing plate 7 by bolts. Figure 8 、 Figure 11 Specifically, the outer edge of the bearing plate 7 protrudes outward from the outer end of the shell 601 to form a protruding portion, the protruding portion is provided with a third bolt hole, the substrate 5 is provided with a fourth bolt hole, the third bolt hole corresponds to the fourth bolt hole, and the bearing plate 7 and the substrate 5 are fixedly connected by bolts penetrating through the third bolt hole and the fourth bolt hole. The bearing plate 7 and the substrate 5 are both PCB boards and are both provided with connecting circuits, and the driving IC is electrically connected to the display source 1 through the connecting circuits.

[0070] It should be noted that in another embodiment, the LED direct display projection display screen further includes a conversion plate 8. When assembled, the LED display module is first mounted on the conversion plate 8 in an array structure. The conversion plate 8 is provided with a threading hole, and the two ends of the FPC connector 10 penetrate through the threading hole and are electrically connected to the LED integrated chip in the display source 1 and the connecting circuit in the PCB board (i.e., the substrate 5), respectively. Figure 12 .

[0071] The LED display module of the present embodiment is convenient for dismounting, mounting and replacing the display source 1, the projection lens 2 and the projection lens mounting seat 6. In addition, when the LED direct display projection display screen is assembled, the positions of the LED display modules can be calibrated to simultaneously calibrate the display source and the projection lens, without the need to separately calibrate the positions of the display source and the projection lens, thereby reducing the assembly difficulty.

[0072] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical scheme described in the utility model embodiment. Those skilled in the art should understand that the utility model can still be modified or equivalently replaced to achieve the same technical effect; as long as the use needs are met, it is within the protection scope of the utility model.

Claims

1. An LED direct-view projection display screen, characterized by, It includes: a substrate (5) for carrying display units, driving units, imaging units; a plurality of display units, which are arrayed on the substrate (5), each display unit comprising a display source (1) and an optical assembly, the display source (1) emitting light rays containing at least three different primary colors for generating an image, the optical assembly comprising a projection lens (2) corresponding to the display source (1) for image magnification to form a magnified image; an imaging unit comprising a screen (4) for receiving and displaying the magnified image; a driving unit comprising a driving IC (3) electrically connected to the display source for controlling the working state of the display source; During display, the driving IC (3) drives the display source to work, and the light colors in the same display source (1) mix to form an image, which is projected to the screen (4) after magnification by the projection lens (2) and displayed by the screen (4).

2. The LED direct-view projection display screen of claim 1, wherein, The same display source (1) comprises a blue light chip and a filter (100), the filter covering the light emitting surface of the blue light chip, the blue light emitted by the blue light chip forming a plurality of pixels after being filtered by the filter (100), each pixel containing at least three different primary colors: red light, green light and blue light, respectively red light area (101), green light area (102) and blue light area (103), which are arranged in sequence from left to right, or the red light area (101), green light area (102) and blue light area (103) are arranged in the shape of "pin".

3. The LED direct-view projection display screen of claim 1, wherein, The same display source (1) comprises a plurality of pixels, each pixel comprising a red light area (101), two green light areas (102) and a blue light area (103), which are arranged in the shape of a rectangle.

4. The LED direct-view projection display screen of claim 1, 2, or 3, wherein, The projection lens (2) is directly mounted on the substrate (5), or the projection lens (2) is mounted on the substrate (5) through a projection lens mounting seat (6).

5. The LED direct-view projection display screen of claim 4, wherein, The projection lens mounting seat (6) comprises a hollow shell (601), the projection lens (2) is mounted in the shell, the top and bottom of the shell (601) are respectively provided with a first light transmission area (602) and a second light transmission area (603), one side of the second light transmission area (603) corresponds to the light emitting surface of the display source (1), and the other side corresponds to the light entering end of the projection lens (2), one side of the first light transmission area (602) corresponds to the light emitting end of the projection lens (2), and the other side corresponds to the screen (4).

6. The LED direct-view projection display screen of claim 1, wherein, The projection lens (2) is a macro lens, the display source (1) is located at the object end of the macro lens, the imaging unit is located at the image end of the macro lens, the image distance of the image end is greater than the object distance of the object end, and the image distance and the object distance are multiples of the focal length of the macro lens.

7. An LED display module for use in the LED direct-view projection display screen of claim 1, the LED display module comprising a display unit, characterized in that, The LED display module further comprises a bearing plate (7), and the display unit is installed in the substrate (5) of the LED direct projection display screen through the bearing plate (7).

8. The LED display module of claim 7, wherein, The LED display module further comprises a projection lens mounting seat (6), and the projection lens (2) is installed on the bearing plate (7) through the projection lens mounting seat (6).

9. The LED display module of claim 8, wherein, The projection lens mounting seat (6) comprises a hollow shell (601), the projection lens (2) is installed in the shell, and the top end and the bottom end of the shell (601) are respectively provided with a first light transmission area (602) and a second light transmission area (603); one side of the second light transmission area (603) corresponds to the light exit surface of the display source (1) in the display unit, and the other side corresponds to the light entrance end of the projection lens (2); one side of the first light transmission area (602) corresponds to the light exit end of the projection lens (2), and the other side corresponds to the screen (4).

10. The LED display module of claim 9, wherein, The outer edge of the bearing plate (7) protrudes from the outer side end of the shell (601) to form a protruding part, the protruding part is provided with a third bolt hole, the substrate (5) is provided with a fourth bolt hole, the third bolt hole corresponds to the fourth bolt hole, and the bearing plate (7) and the substrate (5) are fixedly connected through bolts penetrating the third bolt hole and the fourth bolt hole; the substrate (5) is a PCB board, and the display source (1) is electrically connected with the driving IC through the connecting circuit and the FPC connector in the PCB board.

Images