CN111123511A - Illumination system and illumination method - Google Patents
Illumination system and illumination method Download PDFInfo
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- CN111123511A CN111123511A CN201811285788.XA CN201811285788A CN111123511A CN 111123511 A CN111123511 A CN 111123511A CN 201811285788 A CN201811285788 A CN 201811285788A CN 111123511 A CN111123511 A CN 111123511A
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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Abstract
The present application relates to a lighting system and a lighting method. The lighting system may include: a light source module emitting an illumination beam; a light ray adjusting mechanism which is arranged behind the light source module along the light path of the light beam, shapes the incident light beam and outputs a uniform light beam; the microstructure is arranged behind the light ray adjusting mechanism along the light path of the light beam and is used for adjusting the divergence angle of the emergent light beam; and a display module that receives the light beam emitted from the microstructure to illuminate a display image. According to the illumination system and the illumination method, the divergence angle of the light beam can be effectively controlled to adapt to LCD screens with different sizes.
Description
Technical Field
The present application relates to the technical field of mechanical engineering, lighting, and the like, and more particularly, to a lighting system and a lighting method for implementing a TFT-PGU with multiple divergence angles.
Background
With the continuous development of safe driving technology, a vehicle-mounted HUD (Head up Display) is widely applied. The purpose of the HUD optical system is to present a virtual display to the driver in a viewing distance of several meters in front of the road, and the driver can always obtain various information related to driving in a basic visual field without lowering the head of an observation instrument, thereby greatly improving the safety factor.
Although the DLP-PGU is the mainstream of future HUDs, the requirement of customers for the TFT-PGU is still larger considering that the traditional TFT-PGU is cheaper and smaller than the DLP-PGU.
The goal of a TFT (Thin Film Transistor) -PGU is to uniformly illuminate the LCD screen and to improve the system efficiency as much as possible. Since the LCD itself is not light-emitting, the image on the LCD needs to be delivered to the human eye by illumination, which is backlighting; but often the LCD screen edge area cannot be illuminated because of the small divergence angle of the backlight, requiring the LCD to be placed at a remote location; or the divergence angle is large so that the area outside the range of the LCD screen is also illuminated, so that the energy spill causes the light efficiency to be reduced.
Therefore, there is a need for an illumination system and an illumination method that neither increases the volume nor affects the light efficiency, while also effectively controlling the divergence angle to fit the LCD.
Disclosure of Invention
It is an object of the present application to at least partially solve at least one of the above-mentioned problems in existing lighting systems.
An aspect of the present application provides a lighting system, which may include: a light source module emitting an illumination beam; a light ray adjusting mechanism which is arranged behind the light source module along the light path of the light beam, shapes the incident light beam and outputs a uniform light beam; the microstructure is arranged behind the light ray adjusting mechanism along the light path of the light beam and is used for adjusting the divergence angle of the emergent light beam; and a display module that receives the light beam emitted from the microstructure to illuminate a display image.
In one embodiment, the light ray adjusting mechanism may sequentially include a collimating lens, a relay lens and a cylindrical lens along an optical path of the light beam, wherein the collimating lens may collimate and output the incident light beam; the relay lens can shape, homogenize and output the incident light beam; and the cylindrical mirror can collect and output the incident light beam.
In one embodiment, the light ray adjustment mechanism may further include a mirror disposed between the relay lens and the cylindrical mirror along an optical path of the light beam to change a propagation direction of the light beam exiting from the relay lens to be incident on the cylindrical mirror.
In one embodiment, the microstructures may be formed on the surface of the cylindrical mirror facing the display module, and integrated with the cylindrical mirror.
In another embodiment, the microstructure is detachably disposed between the cylindrical mirror and the display module.
In one embodiment, the microstructures can adjust the divergence angle of the outgoing light beam in the horizontal direction or the vertical direction, respectively.
In one embodiment, the microstructures can adjust the divergence angle of the outgoing light beam in both the horizontal and vertical directions.
In one embodiment, the light source module may be an LED light source.
In one embodiment, the display module may be a TFT display.
In one embodiment, the collimating lens may be a total internal reflection TIR lens.
In one embodiment, the relay lens may be a micro array lens.
In another aspect, the present application provides an illumination method for controlling the exit angle of a light beam by using the above illumination system, the illumination method comprising the following steps:
1) emitting a light beam for illumination by using a light source module;
2) shaping the light beam through a light ray adjusting mechanism and outputting a uniform light beam;
3) receiving the uniform light beam through the microstructure and adjusting the divergence angle of the emergent light beam; and
4) the light beam with the adjusted divergence angle is emitted to the display module to be illuminated.
In one embodiment, receiving the uniform beam of light by the microstructure and adjusting the divergence angle of the emerging beam of light may include adjusting the divergence angle of the emerging beam of light in a horizontal direction or a vertical direction, respectively.
In one embodiment, receiving the uniform beam of light and adjusting the angle of divergence of the emerging beam of light by the microstructure may include adjusting the angle of divergence of the emerging beam of light in both the horizontal and vertical directions.
In one embodiment, the light ray adjusting mechanism may sequentially include a collimating lens, a relay lens and a cylindrical lens along an optical path of the light beam, wherein the collimating lens may collimate and output the incident light beam; the relay lens can shape, homogenize and output the incident light beam; and the cylindrical mirror can collect and output the incident light beam.
In one embodiment, the light ray adjustment mechanism may further include a mirror disposed between the relay lens and the cylindrical mirror along an optical path of the light beam to change a propagation direction of the light beam exiting from the relay lens to be incident on the cylindrical mirror.
In one embodiment, the microstructures may be formed on the surface of the cylindrical mirror facing the display module, and integrated with the cylindrical mirror.
In one embodiment, the microstructure is detachably disposed between the cylindrical mirror and the display module.
The lighting system according to the above embodiment of the present application has at least one of the following advantages:
1. by preparing a microstructure on the surface of a component (such as a cylindrical mirror) or adding a microstructure component additionally, the divergence angle of a light beam can be controlled, and the uniformity of the light beam is not influenced;
2. the outgoing light beam can be adapted to the LCD screen by adjusting the combination of the light beam divergence angles in the horizontal direction and the vertical direction according to the actual requirement of different distances of the placement positions of the display screen (such as the LCD screen), and the light effect and the volume of the system are not influenced;
3. for LCD screens with different sizes, the backlight requirement can be met only by designing the surface shape of the microstructure, and other optical components do not need to be redesigned, so that the design and manufacturing cost is reduced.
4. The TIR lens, the micro-array lens, the reflector and the cylindrical mirror are effectively integrated, the backlight effect and the uniformity can be improved, the number of the TIR lenses can be increased, light reaching the LCD screen can be increased, and the backlight requirement of higher brightness can be met.
Drawings
The above and other advantages of embodiments of the present application will become apparent from the detailed description made with reference to the following drawings, which are intended to illustrate and not to limit exemplary embodiments of the present application. The same or similar elements in different drawings are denoted by the same reference numerals, and in which:
fig. 1 shows a schematic block diagram of a lighting system according to embodiment 1 of the present application; and
fig. 2 shows a schematic block diagram of a lighting system according to embodiment 2 of the present application.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It is obvious to a person skilled in the art that other figures can also be derived from these figures without inventive effort. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
Like numbers refer to like elements throughout the specification. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In an embodiment, an illumination system may include a light source module for emitting a light beam, a light adjustment mechanism for adjusting light transmission properties, and a display module for displaying an image. In the illumination system, the light source module, the light ray adjusting mechanism and the display module are sequentially arranged along a light path of light beam propagation.
The light source module generally employs an LED light source. However, the application is not limited thereto, and other illumination sources suitable in the field of illumination systems may be employed according to the needs of practical production and implementation without departing from the scope of the invention.
The light adjustment mechanism may typically include a combination of a collimating lens, a relay lens, and a cylindrical mirror. The light ray adjusting mechanism adjusts and shapes the light beam emitted by the light source module, so that the passed light beam is shaped into a uniform light beam. Specifically, the collimating lens can collimate and output an incident light beam; the relay lens can shape, homogenize and output the incident light beam; and the cylindrical mirror can collect and output the incident light beam. The collimating lens can be a Total Internal Reflection (TIR) lens, and the relay lens can be a micro-array lens. Alternatively, the light ray adjustment mechanism may further include a mirror disposed between the relay lens and the cylindrical mirror along the optical path of the light beam so that the light beam exiting from the relay lens is incident to the cylindrical mirror with changing the propagation direction. The reflector can change the light transmission direction, and effectively reduce the physical total length of the lighting system. It should be understood that the light ray adjustment mechanism is not limited to the combination of the above-described lenses as long as a lens that shapes the passed light beam into a uniform outgoing light beam can be realized.
The microstructure is generally arranged behind the light ray adjusting mechanism, receives the light beam and adjusts the divergence angle of the emergent light beam according to requirements, so that the light beam is better adapted to the display screen. The microstructure is, for example, a micro-lens array which is not uniformly distributed, and the direction of an emergent light beam is controlled by optimizing the curvature of the micro-lens on the surface, so that the aim of controlling the divergence angle is fulfilled as a whole. In addition, the density of the micro-lenses in different areas of the surface of the microstructure, the shape of the micro-lenses and the size of the micro-lenses can be adjusted to control the uniformity of light. The microstructure can be prepared on the surface of the cylindrical mirror facing the display module and is integrated with the cylindrical mirror. Alternatively, the microstructure may also be detachably disposed between the cylindrical mirror and the display module. The micro-structure can adjust the divergence angle of the emergent light beam in the horizontal direction or the vertical direction respectively. Further, the micro-structure can adjust the divergence angle of the emergent light beam in the horizontal direction and the vertical direction simultaneously.
The display module is typically a common TFT LCD display. Since the LCD display itself is non-emissive, the image on the LCD needs to be displayed by illumination. The light beam emitted by the light source module reaches the display module after being collimated, shaped, homogenized and the emergent angle is adjusted, so that the image on the display device is displayed.
A specific embodiment of the illumination system according to the present application will be described in detail below with reference to fig. 1 and 2.
Example 1
A lighting system 110 according to a specific embodiment 1 of the present application is specifically described with reference to fig. 1. Fig. 1 shows a schematic block diagram of a lighting system 110 according to embodiment 1 of the present application.
As shown in fig. 1, the illumination system 110 includes: LED light source 10, TIR lens 20, micro array lens 30, reflector 40, cylindrical mirror 50, TFT display screen 60 and microstructure 70. The TIR lens 20, the micro-array lens 30, the reflector 40, and the cylindrical lens 50 together form a light adjusting mechanism of the illumination system 110.
The light beam emitted by the LED light source 10 is collimated by the TIR lens 20, shaped and homogenized by the micro-array lens 30, reflected to the cylindrical lens 50 by the reflector 40, converged by the cylindrical lens 50, and then enters the microstructure 70 to adjust the emergent divergence angle, and finally projected to the TFT LCD screen. As shown in fig. 1, the dashed box on the left shows the backlight illumination mode, via which the image on the LCD screen is illuminated for display to the user.
However, the light ray adjusting mechanism is not limited to the combination of the TIR lens 20, the micro array lens 30, the reflecting mirror 40 and the cylindrical mirror 50 described above, and other lens combinations may be adopted as needed as long as the same technical effects can be achieved. For example, depending on the propagation profile of the light beam, the illumination system may not need to use mirrors to change the direction of the light beam. It should be understood that the number of TIR lenses used as collimating lenses, including but not limited to the number shown in the figures, can be increased as desired to increase the amount of light reaching the LCD screen to achieve higher brightness backlight requirements. It should also be understood that the mirror 40 includes, but is not limited to, a flat mirror, as well as mirrors of other surface type configurations, such as a free-form surface mirror.
According to the illumination system 110 of the embodiment 1, the micro-structure 70 which is formed on the side of the cylindrical mirror 50 facing the display module 60 and integrated with the cylindrical mirror 50 is prepared, so that the divergence angle of the outgoing light beam is adjusted, the light beam is better adapted to the display screen 60, and the light efficiency is improved. The microstructure 70 is, for example, a micro-lens array with uneven distribution, and the direction of the emergent beam is controlled by optimizing the curvature of the micro-lens on the surface, so as to achieve the purpose of controlling the divergence angle as a whole. The detailed structure of the microstructure 70 is shown in the lower part of fig. 1. The microstructure 70 can adjust the divergence angle of the emergent light beam in the horizontal direction or the vertical direction respectively. Further or alternatively, the microstructures 70 may also adjust the divergence angle of the outgoing light beam in both the horizontal and vertical directions.
In practical application, the divergence angle of the light beam can be adjusted to fit the TFT LCD screen according to the size and the placement distance of the LCD screen in practical requirements. For example, when the size of the TFT LCD screen is fixed, the screen cannot be uniformly illuminated due to the different distances between the positions, and the illumination system 110 according to the present application can adapt to the TFT LCD screen at a longer distance by adjusting the divergence angle of the light beam to be smaller by the microstructures 70, and can also adapt to the TFTLCD screen at a shorter distance by adjusting the divergence angle to be larger. Meanwhile, the microstructure 70 is formed on the surface of the cylindrical mirror 50 facing the display module 60 and integrated with the cylindrical mirror 50, so that uniformity is not affected and the volume of the system is not increased.
Example 2
A lighting system 120 according to a specific embodiment 2 of the present application is specifically described with reference to fig. 2. Fig. 2 is a schematic structural view showing a lighting system 120 according to embodiment 2 of the present application.
As shown in fig. 2, the illumination system 120 includes: LED light source 10, TIR lens 20, micro array lens 30, reflector 40, cylindrical mirror 50, TFT display screen 60 and microstructure device 70. The TIR lens 20, the micro-array lens 30, the reflector 40, and the cylindrical lens 50 together form a light adjusting mechanism of the illumination system 110.
The light beam emitted by the LED light source 10 is collimated by the TIR lens 20, shaped and homogenized by the micro-array lens 30, reflected to the cylindrical lens 50 by the reflector 40, converged by the cylindrical lens 50, and then enters the micro-structure device 70 to adjust the emergent divergence angle, and finally projected to the TFT LCD screen.
However, the light ray adjusting mechanism is not limited to the combination of the TIR lens 20, the micro array lens 30, the reflecting mirror 40 and the cylindrical mirror 50 described above, and other lens combinations may be adopted as needed as long as the same technical effects can be achieved. For example, depending on the propagation profile of the light beam, the illumination system may not need to use mirrors to change the direction of the light beam. It should be understood that the number of TIR lenses used as collimating lenses, including but not limited to the number shown in the figures, can be increased as desired to increase the amount of light reaching the LCD screen to achieve higher brightness backlight requirements. It should also be understood that the mirror 40 includes, but is not limited to, a flat mirror, as well as mirrors of other surface type configurations, such as a free-form surface mirror.
According to the illumination system 110 of the embodiment 2, the micro-structure device 70 separately disposed between the cylindrical mirror 50 and the display module 60 is used to adjust the divergence angle of the outgoing light beam, so that the light beam is better adapted to the display screen 60, and the light efficiency is improved. The microstructure device 70 is, for example, an unevenly distributed microlens array, and controls the direction of the emergent light beam by optimizing the curvature of the surface microlenses, thereby achieving the purpose of controlling the divergence angle as a whole. The microstructure device 70 can adjust the divergence angle of the outgoing light beam in the horizontal direction or the vertical direction, respectively. Further or alternatively, the microstructure device 70 may also adjust the divergence angle of the outgoing light beam in both the horizontal direction and the vertical direction.
Unlike embodiment 1, the microstructure device 70 of the illumination system 120 according to embodiment 2 of the present application is separately disposed between the cylindrical mirror 50 and the display module 60, that is, a microstructure device 70 is separately added behind the cylindrical mirror 50, a microstructure is formed on the surface of the microstructure device 70, and the microstructure on the device 70 can modulate the light beam exiting from the cylindrical mirror 50, so that the divergence angle of the light beam is changed to adapt to TFT LCD screens with various sizes. The addition of the microstructure device does not increase the volume of the illumination system, and other components do not need to be redesigned.
In practical application, the divergence angle of the light beam can be adjusted to fit the TFT LCD screen according to the size and the placement distance of the LCD screen in practical requirements. For example, when the size of the TFT LCD screen is fixed, the screen cannot be uniformly illuminated due to the different distances between the positions, and the illumination system 110 according to the present application can adapt to the TFT LCD screen at a longer distance by adjusting the divergence angle of the light beam by the microstructure device 70, and can also adapt to the TFT LCD screen at a shorter distance by adjusting the divergence angle to be larger. According to the illumination system 120 of the embodiment 2, for different illumination backlight requirements, only the microstructure device 70 needs to be redesigned, so as to meet the backlight requirements, and neither the processing cost nor the system volume is increased.
Although the above-described embodiments 1 and 2 have been described taking the TFT-PGU backlight illumination system as an example, it is to be understood that the illumination system according to the present application is not limited to the TFT-PGU backlight illumination system, but includes other optical systems based on the TFT-PGU.
In another aspect, the present application provides an illumination method for controlling the exit angle of a light beam by using the above illumination system, the illumination method comprising the following steps:
1) emitting a light beam for illumination by the light source module 10;
2) shaping the light beam through a light ray adjusting mechanism and outputting a uniform light beam;
3) receiving the uniform light beam through the microstructure 70 and adjusting the divergence angle of the outgoing light beam; and
4) the light beam with the adjusted divergence angle is emitted to the display module 60 to be illuminated.
Wherein receiving the uniform light beam and adjusting the divergence angle of the outgoing light beam by the microstructures 70 includes adjusting the divergence angle of the outgoing light beam in a horizontal direction or a vertical direction, respectively. Further or alternatively, receiving the uniform light beam and adjusting the divergence angle of the outgoing light beam by the microstructures 70 includes adjusting the divergence angle of the outgoing light beam in both the horizontal direction and the vertical direction.
According to the various embodiments, the illumination system and the illumination method can flexibly design the angle modulator according to the actual illumination requirements, so that the light beams are adapted to the LCD screen, the illumination light effect is not influenced, and the system volume is not increased. Aiming at different lighting requirements, the actual lighting requirements can be met only by redesigning the microstructure, the processing cost is not increased, the system volume is not increased, and the design and manufacturing cost is favorably reduced. In addition, according to the illumination system of this application, TIR lens, micro-array lens, reflector and cylindrical mirror carry out effective integration, can effectively improve the light efficiency and the degree of consistency in a poor light to the accessible increases the quantity of TIR lens, makes the light that reaches the LCD screen increase, thereby can realize the demand in a poor light of higher luminance.
The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (18)
1. A lighting system, comprising:
a light source module emitting a light beam for illumination;
the light ray adjusting mechanism is arranged behind the light source module along the light path of the light beam, shapes the incident light beam and outputs a uniform light beam;
the microstructure is arranged behind the light ray adjusting mechanism along the light path of the light beam and is used for adjusting the divergence angle of the emergent light beam; and
and the display module receives the light beams emitted from the microstructures to illuminate a display image.
2. The illumination system of claim 1, wherein the light adjustment mechanism comprises, in order along the optical path of the light beam:
a collimating lens for collimating and outputting the incident light beam;
a relay lens for shaping, homogenizing and outputting the incident light beam; and
and the cylindrical mirror is used for collecting and outputting the incident light beams.
3. The lighting system of claim 2, wherein the light adjustment mechanism further comprises:
and the reflecting mirror is arranged between the relay lens and the cylindrical mirror along the optical path of the light beam so as to change the propagation direction of the light beam emitted from the relay lens and enter the cylindrical mirror.
4. The illumination system of claim 2, wherein the microstructures are formed on a surface of the cylindrical mirror facing the display module integrally with the cylindrical mirror.
5. The illumination system of claim 2, wherein the microstructures are separately disposed between the cylindrical mirror and the display module.
6. The illumination system of any of claims 1-5, wherein the microstructures adjust the divergence angle of the outgoing light beam in a horizontal direction or a vertical direction, respectively.
7. The illumination system of any of claims 1-5, wherein the microstructures adjust divergence angles of the outgoing light beam in both a horizontal direction and a vertical direction.
8. The lighting system of any one of claims 1-5, wherein the light source module is an LED light source.
9. The lighting system of any one of claims 1-5, wherein the display module is a TFT display.
10. The illumination system of any of claims 2-5, wherein the collimating lens is a Total Internal Reflection (TIR) lens.
11. The lighting system of any one of claims 2-5, wherein the relay lens is a micro array lens.
12. An illumination method for controlling the exit angle of a light beam by using the illumination system of claim 1, the illumination method comprising:
emitting a light beam for illumination by using a light source module;
shaping the light beam through a light ray adjusting mechanism and outputting a uniform light beam;
receiving the uniform light beam through the microstructure and adjusting the divergence angle of the emergent light beam; and
the light beam with the adjusted divergence angle is emitted to the display module to be illuminated.
13. The illumination method of claim 12, wherein receiving the uniform beam of light through the microstructure and adjusting the divergence angle of the emerging beam of light comprises:
the divergence angle of the emergent light beam is adjusted in the horizontal direction or the vertical direction respectively.
14. The illumination method of claim 12, wherein receiving the uniform beam of light through the microstructure and adjusting the divergence angle of the emerging beam of light comprises:
the divergence angle of the emergent light beam is adjusted in the horizontal direction and the vertical direction simultaneously.
15. The illumination method of claim 12, wherein the light adjustment mechanism comprises, in order along the optical path of the light beam:
a collimating lens for collimating and outputting the incident light beam;
a relay lens for shaping, homogenizing and outputting the incident light beam; and
and the cylindrical mirror is used for collecting and outputting the incident light beams.
16. The lighting method of claim 15, wherein the light adjustment mechanism further comprises:
and the reflecting mirror is arranged between the relay lens and the cylindrical mirror along the optical path of the light beam so as to change the propagation direction of the light beam emitted from the relay lens and enter the cylindrical mirror.
17. The illumination method according to claim 15 or 16, wherein the microstructures are formed integrally with the cylindrical mirror on a surface of the cylindrical mirror facing the display module.
18. The lighting method according to claim 15 or 16, wherein the microstructures are separately provided between the cylindrical mirror and the display module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811285788.XA CN111123511A (en) | 2018-10-31 | 2018-10-31 | Illumination system and illumination method |
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| CN201811285788.XA CN111123511A (en) | 2018-10-31 | 2018-10-31 | Illumination system and illumination method |
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| CN201811285788.XA Pending CN111123511A (en) | 2018-10-31 | 2018-10-31 | Illumination system and illumination method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117233873A (en) * | 2023-11-13 | 2023-12-15 | 深圳市顺达荣科技有限公司 | Manufacturing method of separable lens module of LED display screen of all-in-one machine and display screen |
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| CN203275775U (en) * | 2013-03-27 | 2013-11-06 | 北京时代卓易科技发展有限公司 | Optical reshaper of outputting facula uniformly |
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| JP2011128634A (en) * | 2011-01-19 | 2011-06-30 | Mitsubishi Electric Corp | Lighting optical system and image display apparatus |
| CN203275775U (en) * | 2013-03-27 | 2013-11-06 | 北京时代卓易科技发展有限公司 | Optical reshaper of outputting facula uniformly |
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| CN117233873A (en) * | 2023-11-13 | 2023-12-15 | 深圳市顺达荣科技有限公司 | Manufacturing method of separable lens module of LED display screen of all-in-one machine and display screen |
| CN117233873B (en) * | 2023-11-13 | 2024-02-02 | 深圳市顺达荣科技有限公司 | Manufacturing method of separable lens module of LED display screen of all-in-one machine and display screen |
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