Color digital projection device, system and method based on white light Micro-LED optical engine

Abstract

The invention discloses a color digital projection device based on a white light Micro-LED optical engine, which comprises at least seven groups of monochromatic optical components, a control circuit module, a power supply driving module and a mainboard control module, and is characterized in that each monochromatic optical component is provided with a white light Micro-LED optical engine component; each white light Micro-LED optical engine assembly is in signal control connection with the control circuit module, each white light Micro-LED optical engine assembly and the control circuit module are both electrically connected with the power supply driving module, each control circuit module is in signal connection with the mainboard control module, and the mainboard control module is in signal connection with the image signal source. The monochromatic optical assembly shares the internal light combination optical assembly, and the internal light combination optical assembly obtains a target light beam through light combination processing and outputs the target light beam to the external objective optical assembly for projection imaging; the invention further discloses a projection system and a projection method. According to the invention, stray spots do not need to be processed, the quality of combined light beams is improved at the light source, light beams with seven colors are provided, the colors are rich and wider, light and display are integrated, direct imaging is realized, and an expensive imaging chip is replaced.

Description

Technical Field

[0001] The present invention relates to the field of lighting display technology, and in particular to a color digital projection device, a projection system and a projection method based on a white light Micro-LED optical engine. Background Art

[0002] With the development of science and technology, the scale of the digital economy continues to expand, and people's demand for information display continues to increase. The market for large-screen display projectors has grown rapidly, ranging from theater screens, giant screens, and building light and shadow shows to desktop micro projectors and pocket projectors.

[0003] Among the existing projection technologies, DMD projection technology uses the following method: after projecting a light beam onto a light curtain to form a specific pattern, the pattern is reflected to the audience through the reflective surface of the light curtain for viewing, that is, DMD micro-mirrors modulate the light → projection lens focuses and projects → screen reflects / diffuses → audience visually receives it. LCD projection technology uses the following method: the light source emits white light, which is decomposed into three primary colors of red, green, and blue by a color separation mirror. The three primary colors of light penetrate the corresponding LCD panels respectively. Each liquid crystal pixel controls the molecular arrangement through voltage, and adjusts the transmittance to form a grayscale image. The modulated three-color light is resynthesized into full-color light through a prism or filter, and is amplified by the projection lens and projected onto the screen. The image is reflected (front projection) or transmitted (rear projection) from the screen to the audience. The audience observes the reflected / transmitted light on the screen, rather than the light that directly penetrates the liquid crystal panel. Neither of these two projection technologies has achieved the technical effect of light-display integration or light-display integration and direct imaging.

[0004] Whether it is DLP (Digital Light Processing) technology using the DMD (Digital Micromirror Device) platform, LCD (Liquid Crystal Display) technology, or LCoS (Liquid Crystal On Silicon) technology, the core component in the above technical path is the imaging device, which is indispensable for the entire projection equipment. It itself is a non-luminous element, and the imaging device is separated from the light source.

[0005] For example, the Chinese invention patent application, with the announcement number CN106686360B, uses LED as the light source, and the light is combined by a beam splitter prism and then output, and then a DMD chip is used as an imaging element. After the light is processed by the imaging element, it is projected and output to the illuminated surface through an objective lens. The technical implementation logic is: using LED as the light source, through a complex optical system such as light splitting, light combining, reflection and refraction, irradiates or penetrates the imaging device in the optical path, and then through the magnification and focusing of the objective lens, the light is projected and irradiated on the illuminated surface to form an image.

[0006] The technical solution of this type of projector has complex light path processing logic, is relatively large in size, and has high requirements for optical devices and assembly processes. In essence, light is projected onto the illuminated surface only after being reflected or penetrating the imaging device. It does not achieve the functional effects of light-display integration and direct imaging, so its luminous efficiency is not high, and the general luminous efficiency can only reach 30lm / W at most. Due to its low luminous efficiency, in order to obtain greater brightness, it is necessary to increase the brightness of the light source, and then achieve this goal by increasing the number and power of the light source. This leads to a complex internal structure, high assembly process requirements, high energy consumption, large and bulky size, and there are also problems such as high price and short light source life.

[0007] Therefore, it is urgent to propose a color digital projection device, system and method based on a white light Micro-LED optical engine to overcome the above technical problems. Summary of the invention

[0008] In view of the problems existing in the prior art, the present invention provides a color digital projection device, system and method based on a white light Micro-LED optical engine. After adopting the color digital projection device, system and method, on the one hand, seven white light Micro-LED optical engine components are adopted, and a beam splitter prism is used in the optical path to perform color separation processing on the white light to generate the required red, green, blue, white, azure, lemon and amber colored lights. Due to the existence of the aforementioned seven colors of light, compared with the traditional projector, the projector does not need to use a fluorescent wheel to process the blue light beam to generate other colored lights, nor does it need a color wheel to perform color separation processing on the optical path; the optical system does not need similar optical imaging elements such as DMD and LCD; since the light source adopts seven white light Micro-LED optical engine components as the light source, which replaces the traditional laser light source, there is no need to use a stray spot device to process the stray spots of the laser light source, and the quality of the combined light beam can be improved at the light source; On the other hand, through the control circuit module and the power drive module, the signal control connection and electrical connection with the corresponding white light Micro-LED optical engine component are driven to control the lighting or extinguishing of a single, local or overall Micro LED in a specified area on each white light Micro-LED optical engine component, and a beam splitter prism is used for color separation and light splitting processing. Finally, there are seven color beams in the light path output by the projection device, including red, green, blue, white, azure, lemon, and amber. Its colors are rich and meet the requirements of the CIE1931 color space. Its color gamut is wider and can reach 120% Rec.2020 (BT.2020); In addition, by adopting the advanced technology of integrating light and display and direct imaging, the white light Micro-LED optical engine component is both the light source of the projection device and the imaging chip of the projection device. There is no need to add additional expensive DMD, LCD or LCOS imaging chips. Since the light source and heat of the present application come from the white light Micro-LED optical engine component, it integrates control, power supply, drive and heat dissipation modules in one. The signal control and conduction heat dissipation of the white light Micro-LED optical engine component can be centralized through the control circuit module, power drive module, mainboard control module and heat dissipation component, making the control module and heat dissipation structure of the projection device simpler, avoiding the complex internal structure of the projection device, high assembly process requirements, high energy consumption, large and bulky technical problems.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: The present application proposes a color digital projection device based on a white light Micro-LED optical engine, comprising at least seven groups of monochromatic optical components, a control circuit module, a power drive module and a mainboard control module, wherein the monochromatic optical components at least include: an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component and an A primary color optical component, and the monochromatic optical components all have a white light Micro-LED optical engine component; Each of the white light Micro-LED optical engine components is connected to the corresponding control circuit module by signal control, each of the white light Micro-LED optical engine components and the corresponding control circuit module are electrically connected to the power drive module, each of the control circuit modules is connected to the mainboard control module by signal, and the mainboard control module is connected to the image signal source by signal; The R primary color optical component, the G primary color optical component, the B primary color optical component, the W primary color optical component, the C primary color optical component, the L primary color optical component and the A primary color optical component share a set of internal light-combining optical components, and the internal light-combining optical components obtain a target light beam after light-combining processing and output it to an external objective optical component for projection imaging; The signal is input into the system through the image signal source, and a global signal interaction network is constructed through the mainboard control module, and signal analysis and initial routing allocation are completed based on the communication protocol. In this process, the mainboard control module adapts the input signal to the protocol, and transmits the signal to the corresponding functional module according to the preset logic, thus building the initial link of hierarchical processing; the power drive module provides a stable power supply for each module to ensure the circuit working voltage and power matching; the control circuit module performs preprocessing on the input signal: standardize the signal amplitude through level conversion, use the timing circuit to complete the signal clock calibration, and perform noise filtering and impedance matching operations at the same time, so that the electrical signal meets the input technical indicators of the optical path processing module.

[0010] Furthermore, the monochromatic optical components are respectively: R primary color optical component, including a first white light Micro-LED optical engine component, a red beam splitter prism, and a first refractive lens; G primary color optical component, including a second white light Micro-LED optical engine component, a green beam splitter prism, and a second refractive lens; B primary color optical component, including a third white light Micro-LED optical engine component, a blue beam splitter prism, and a third refractive lens; W primary color optical component, including a fourth white light Micro-LED optical engine component; C primary color optical component, including a fifth white light Micro-LED optical engine component, a cyan beam splitter prism, and a fourth refractive lens; L primary color optical component, including a sixth white light Micro-LED optical engine component, a lemon beam splitter prism, and a fifth refractive lens; A primary color optical component, including a seventh white light Micro-LED optical engine component, an amber beam splitter prism, and a sixth refractive lens.

[0011] Furthermore, the white light Micro-LED optical engine component includes a substrate, a pixel matrix array arranged on the substrate and electrically connected to the substrate, and a heat dissipation structure bonded to the substrate, a PCBA control board electrically connected to the substrate is bonded to the heat dissipation structure, the PCBA control board is electrically connected to the substrate through a metal conductive medium, and the PCBA control board is signal-connected to the control circuit module.

[0012] Furthermore, the pixel matrix array is fixed to the end of the heat dissipation structure through the substrate; the pixel matrix array is electrically arranged and combined by a plurality of Micro LEDs in a matrix form on the substrate, and the PCBA control board is arranged on the outer peripheral side of the heat dissipation structure, and the PCBA control board can drive and control the lighting or extinguishing of a single Micro LED, a part of a designated area, or the whole Micro LED.

[0013] Furthermore, the metal conductive medium is a metal conductive pin header, an FPC metal conductive soft board or a metal conductive cable; one end of the metal conductive medium is electrically connected to the substrate, and the other end of the metal conductive medium is electrically connected to the PCBA control board. The metal conductive medium is arranged in a plurality of groups, each group of the metal conductive medium is arranged with a plurality of conductors, and the PCBA control board is arranged with a plurality of groups corresponding to the number of the metal conductive medium.

[0014] Furthermore, the internal light-combining optical assembly includes a light-combining prism, a light-guiding prism, a first light-collecting lens, a second light-collecting lens, a beam-splitting lens, a TIR prism and a reflecting lens, which are sequentially arranged according to the optical path.

[0015] Furthermore, the external objective lens optical component includes a filter, an objective lens group and a protective lens, and the objective lens group has a convex lens, a concave lens and an aspherical lens.

[0016] Furthermore, along the direction of the optical path, each of the monochromatic optical components, the internal light-combining optical components and the external objective optical components are arranged in sequence and are all located on the same optical path.

[0017] Furthermore, the color digital projection device also includes a heat dissipation component, which is arranged in the color digital projection device and performs conduction heat dissipation on the control circuit module, the power drive module, the mainboard control module and the white light Micro-LED optical engine component. The heat dissipation component adopts one or more of natural air cooling, fan air cooling and liquid cooling according to the power and heat dissipation requirements of the color digital projection device.

[0018] In order to solve the technical problem, the further technical solution adopted by this application is: The present application proposes a color digital projection system based on any of the color digital projection devices described above, comprising: At least seven groups of monochromatic optical components, each having a white light Micro-LED optical engine component, namely an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component, and an A primary color optical component, for color separation of white light from the white light Micro-LED optical engine component to generate required red, green, blue, white, azure, lemon, and amber colored light; The internal light-combining optical component includes a light-combining prism, a light-guiding prism, a first light-collecting lens, a second light-collecting lens, a light-splitting lens, a TIR prism and a reflecting lens which are sequentially arranged according to the optical path, and is used to perform multi-color light synthesis and uniform processing on the holographic light beams of different light types from the seven groups of monochromatic optical components to form a colorful holographic light-combining beam; The external objective optical assembly includes a filter, an objective lens group and a protective lens. The objective lens group has a convex lens, a concave lens and an aspherical lens, which is used to focus, adjust and correct the distortion of the colored holographic light beam from the internal light combining optical assembly and then project the image onto the illuminated surface; Along the optical path direction, each of the monochromatic optical components, the internal light combining optical components and the external objective optical components are arranged in sequence and are all located on the same optical path; A control circuit module is connected to the corresponding white light Micro-LED optical engine assembly signal control to control the lighting or extinguishing of a single, local or entire Micro LED in a specified area on each of the white light Micro-LED optical engine assemblies; A power drive module, electrically connected to each of the control circuit modules, for supplying power to the control circuit modules and the mainboard control module; A mainboard control module is connected to each of the control circuit modules by signal, and the mainboard control module is connected to the image signal source by signal, so as to input image signals, video signals and control signals to the control circuit modules; wherein the mainboard control module can receive external image signals and / or external video signals, and / or the mainboard control module reads image signals stored in itself, and / or video source signals; A heat dissipation component is disposed in the color digital projection device and performs conduction heat dissipation on the control circuit module, the power drive module, the mainboard control module and the white light Micro-LED optical engine component.

[0019] In order to solve the technical problem, the further technical solution adopted by this application is: The present application proposes a projection method based on any of the above-mentioned color digital projection systems, the method comprising the following steps: The first step: arranging the seven groups of monochromatic optical components, the internal light combining optical components and the external objective optical components in the same optical path in a sequential order along the direction of the optical path; Step 2: by connecting the power drive module to electricity, the power drive module powers on the control circuit module and the mainboard control module to work; Step 3: The mainboard control module reads the image signal or video signal and sends the aforementioned signal and control signal to the control circuit module. The control circuit module shakes hands with the mainboard control module and sends the control signal to the seven groups of white light Micro-LED optical engine components to drive and control the lighting or extinguishing of a single, local or overall Micro LED in a designated area on each white light Micro-LED optical engine component, thereby emitting or extinguishing seven groups of holographic light beams with different light types; Step 4: The seven groups of holographic light beams with different light patterns in the third step are processed by the corresponding primary color optical components, the beam splitter prism and the refractive lens, and then processed by the internal light combining optical components for multi-color light synthesis and uniformity, thus forming a colorful holographic light combining beam; Step 5: The colored holographic light beam in the fourth step is focused, adjusted and corrected for distortion by an external objective lens optical component, and then projected onto the illuminated surface; Among them, in the second to fifth steps, the heat dissipation component is arranged in the color digital projection device and conducts heat dissipation to the control circuit module, the power drive module, the mainboard control module and the white light Micro-LED optical engine component; Among them, in the third step, the control circuit module sends a control signal to the seven groups of white light Micro-LED optical engine components on the substrate through the PCBA control board.

[0020] Compared with the prior art, this application has at least the following technical effects: On the one hand, the present application adopts seven white light Micro-LED optical engine components, uses a beam splitter prism in the optical path, performs color separation processing on the white light, and generates the required red, green, blue, white, azure, lemon, and amber colored lights. Due to the existence of the aforementioned seven colors of light, compared with the traditional projection device, the projector does not need to use a fluorescent wheel to process the blue light beam to generate other colored lights, nor does it need a color wheel to process the light path for color separation; the optical system does not require similar optical imaging elements such as DMD and LCD; since the light source adopts seven white light Micro-LED optical engine components as the light source, which replaces the traditional laser light source, there is no need to use a stray speckle device to process the stray speckle of the laser light source, and the quality of the combined light beam can be improved at the light source; On the other hand, the present application drives and controls the lighting or extinguishing of a single, local or overall Micro LED in a designated area on each white light Micro LED optical engine component through a control circuit module and a power drive module, and a signal control connection and electrical connection with the corresponding white light Micro LED optical engine component. A beam splitter prism is used for color separation and light splitting processing. Finally, there are seven color beams in the light path output by the projection device, including red, green, blue, white, azure, lemon, and amber. The colors are rich and meet the requirements of the CIE1931 color space standard. The color gamut is wider and can reach 120% Rec.2020 (BT.2020). In addition, the present application adopts the advanced technology of light-display integration and direct imaging. The white light Micro-LED optical engine component is both the light source of the projection device and the imaging chip of the projection device. There is no need to add additional expensive DMD, LCD or LCOS imaging chips. Since the light source and heat of the present application come from the white light Micro-LED optical engine component, it integrates control, power supply, drive and heat dissipation modules in one. The signal control and conduction heat dissipation of the white light Micro-LED optical engine component can be centralized through the control circuit module, power drive module, mainboard control module and heat dissipation component, making the control module and heat dissipation structure of the projection device simpler, avoiding the complex internal structure of the projection device, high assembly process requirements, high energy consumption, large and bulky technical problems.

[0021] The signal processing process of the present invention is as follows: the signal is input into the system through the image signal source, a global signal interaction network is constructed through the mainboard control module, and signal analysis and initial routing allocation are completed based on the communication protocol. In this process, the mainboard control module performs protocol adaptation on the input signal, and transmits the signal to the corresponding functional module in a direction according to the preset logic, thereby constructing an initial link for hierarchical processing. The power drive module provides a stable power supply for each module to ensure that the circuit operating voltage and power match. The control circuit module performs preprocessing on the input signal: signal amplitude standardization is achieved through level conversion, signal clock calibration is completed using the timing circuit, and noise filtering, impedance matching and other operations are performed at the same time, so that the electrical signal meets the input technical indicators of the optical path processing module.

[0022] The present invention constructs a multi-channel monochrome optical module based on the white light Micro-LED optical engine, which significantly solves the problems of traditional projection optical imaging elements being separated from the light source, complex system control, bulky structure, insufficient color gamut coverage and low spectral energy utilization, while avoiding technical bottlenecks. By introducing extended primary color channels such as W (white), C (cyan), and L (amber), the spectral continuity and color accuracy of the projected image are effectively improved, meeting the strict requirements of the HDR wide color gamut standard for high saturation and color reproduction capabilities.

[0023] Secondly, as an active light-emitting device, Micro-LED has the advantages of high brightness, high response speed and high integration density. Compared with OLED or traditional LED, its single-point light-emitting angle is smaller and the light beam control is more concentrated, thus significantly reducing light loss in the projection path design. With the customized control circuit module, nanosecond PWM dimming is achieved, achieving the technical goals of dynamic contrast enhancement and real-time brightness adjustment.

[0024] At the structural level, the present invention adopts a multi-channel shared light-combining optical component with a unified light-combining path, and integrates multiple primary color channels through a high-precision color synthesis prism or a multi-band dielectric film, thereby reducing the common chromatic aberration, superposition and geometric offset problems in multi-light source systems, ensuring the consistency of the spatial overlap and wavelength ratio of the output light beams, and improving image uniformity and color fusion.

[0025] Finally, the mainboard control module centrally manages the driving and dimming strategies of each channel Micro-LED engine, and achieves high-speed synchronous communication with the image signal source, effectively solving the timing drift and response delay problems existing in the traditional distributed driving structure. The overall system achieves a high degree of adjustability and modular integration while maintaining a compact structure, and has significant potential for industrial promotion.

[0026] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the working structure of Example 1 in this application; Figure 2 It is a schematic diagram of the planar architecture of Example 1 and Example 2 in this application; Figure 3 It is a schematic diagram of the three-dimensional structure of Example 1 and Example 2 in this application; Figure 4 It is a schematic diagram of the three-dimensional structure assembly of the white light Micro-LED optical engine component of Example 1, Example 2 or Example 3 in the present application; Figure 5 It is a schematic diagram of the three-dimensional structure explosion of the white light Micro-LED optical engine assembly of Example 1, Example 2 or Example 3 in the present application; Figure 6 is a perspective schematic diagram of the three-dimensional structure of the white light Micro-LED optical engine assembly of Example 1, Example 2 or Example 3 of the present application; Figure 7 It is a schematic diagram of the process of Example 3 in this application; The parts in the accompanying drawings are marked as follows: Control circuit module 1, power drive module 2, mainboard control module 3, first white light Micro-LED optical engine component 4, red beam splitter prism 5, first refractive lens 6, second white light Micro-LED optical engine component 7, green beam splitter prism 8, second refractive lens 9, third white light Micro-LED optical engine component 10, blue beam splitter prism 11, third refractive lens 12, fourth white light Micro-LED optical engine component 13, fifth white light Micro-LED optical engine component 14, azure beam splitter prism 15, fourth refractive lens 16, sixth white light Micro-LED optical engine component 17, lemon beam splitter prism 18, fifth refractive lens 19, seventh white light Micro-LED optical engine component 20, amber beam splitter prism 21, sixth refractive lens 22, image signal source 23, internal light combining optical component 24, external objective lens optical component 25, substrate 26, pixel matrix array 27, heat dissipation structure 28, PCBA control board 29, metal conductive medium 30, Micro LED 31 , light combining prism 32 , light guiding prism 33 , first condensing lens 34 , second condensing lens 35 , beam splitting lens 36 , TIR prism 37 , reflecting lens 38 and heat dissipation assembly 39 . DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] like Figures 1 to 3 As shown, the signal processing process of the present invention is as follows: the signal is input into the system through the image signal source 23, a global signal interaction network is constructed through the mainboard control module 3, and signal analysis and initial routing allocation are completed based on the communication protocol. In this process, the mainboard control module 3 performs protocol adaptation on the input signal, and transmits the signal to the corresponding functional module in a direction according to the preset logic, thereby constructing an initial link for hierarchical processing. The power drive module 2 provides a stable power supply for each module to ensure that the circuit operating voltage and power match. The control circuit module 1 performs preprocessing on the input signal: signal amplitude standardization is achieved through level conversion, signal clock calibration is completed using a timing circuit, and noise filtering, impedance matching and other operations are performed at the same time, so that the electrical signal meets the input technical indicators of the optical path processing module.

[0030] a. To project a red "L" character, here's how it works: 1. The DC / DC driver provides working power for all control circuit modules, white light Micro-LED optical engine components, signal conversion modules and other circuit modules; 2. The control circuit module reads an external input signal or an internally stored video signal, and lights up the corresponding Micro LED on the first white light Micro-LED optical engine assembly 4 to form the character “”. The grayscale of the character “”” is determined according to the input signal or the internally stored video signal; 3. " " is displayed on the first white light Micro-LED optical engine component 4, and a white light spot of the corresponding grayscale is emitted, and then passes through the red beam splitter prism 5, the separated red light passes through the first refraction lens 6, and the red light is incident on the light combining prism 32 to become parallel light, passes through the light guide prism 33, the first condenser lens 34, and the second condenser lens 35, and is incident on the beam splitter lens 36, and then is incident on the TIR prism 37, passes through the reflection lens 38, and is incident on the external objective optical component 25. After being magnified and focused by the external objective optical component 25, a red character "L" is finally displayed on the projection interface.

[0031] b. To project the green "L" character, the following works: 1. The DC / DC drive power supply provides working power for all control circuit modules, white light Micro-LED optical engine modules, signal conversion modules and other circuit modules; 2. The control circuit module reads an external input signal or an internally stored video signal, and lights up the corresponding Micro LED on the second white light Micro-LED optical engine assembly 7 to form the character “”. The grayscale of the character “”” is determined according to the input signal or the internally stored video signal; 3. " " is displayed on the second white light Micro-LED optical engine component 7, and a white light spot of the corresponding grayscale is emitted, and then passes through the green beam splitter prism 8, and the separated green light passes through the second refracting lens 9, and the green light is incident on the light combining prism 32 to become parallel light, passes through the light guide prism 33, the first focusing lenses 34, 35, and is incident on the beam splitter lens 36, and then is incident on the TIR prism 37, passes through the reflecting lens 38, and is incident on the external objective optical component 25. After being magnified and focused by the external objective optical component 25, a green character "L" is finally displayed on the projection interface.

[0032] c. To project the "L" character showing red "|" and green "_", the following works: 1. The DC / DC driver provides working power for all control circuit modules, white light Micro-LED optical engine components, signal conversion modules and other circuit modules; 2. The control circuit module reads the external input signal or the internally stored video signal, and lights up the corresponding Micro LED on the first white light Micro-LED optical engine component 4 to form the character "|". The grayscale of the character "|" is determined according to the input signal or the internally stored video signal; lights up the corresponding Micro LED on the second white light Micro-LED optical engine component 7 to form the character "_". The grayscale of the character "_" is determined according to the input signal or the internally stored video signal; 3. Light up the corresponding Micro LED on the first white light Micro-LED optical engine component 4 to form the character “|”; light up the corresponding Micro LED on the second white light Micro-LED optical engine component 7 to form the character “_”; the first white light Micro-LED optical engine component 4 and the second white light Micro-LED optical engine component 7 respectively emit white light spots of corresponding shapes and corresponding grayscales, and then pass through the red beam splitter prism 5 and the green beam splitter prism 8, and respectively emit red light and green light, and pass through the first refractive lens 6 and the second refractive lens 9. The two color lights are incident on the light combining prism 32 to become parallel light, and pass through the light guide prism 33, the first condensing lens 34, and the second condensing lens 35 to enter the beam splitter lens 36, and then enter the TIR prism 37, pass through the reflective lens 38, and enter the external objective optical component 25. After being magnified and focused by the external objective optical component 25, the character “L” is finally displayed on the projection interface.

[0033] According to the above a, b, c, characters of corresponding color brightness need to be projected through the external objective optical component 25. The control circuit module only needs to light up the Micro LED on the corresponding white light Micro-LED optical engine component according to the external input signal or the internally stored video signal to form characters of corresponding shapes, and the Micro LED lights up according to the corresponding grayscale value. After passing through optical components such as the light splitting and color separation prism and the focusing prism, the characters of corresponding color brightness are finally projected by the external objective optical component 25.

[0034] Similarly, if a picture of corresponding color brightness is to be projected through the external objective optical component 25, it also works according to the aforementioned principle and will not be described in detail here.

[0035] As mentioned above, this technical means realizes the working mechanism of light-display integration and direct imaging. That is, the light source end provides light, and the light source is also a digital imaging element, and the projected display image has a light spot with color and shape. After the optical path processing of the optical component, a color image is finally projected.

[0036] Example 1

[0037] like Figures 1 to 3As shown, in one of the embodiments of the present application, a color digital projection device based on a white light Micro-LED optical engine is provided, comprising at least seven groups of monochromatic optical components, a control circuit module 1, a power drive module 2 and a mainboard control module 3, wherein the monochromatic optical components are preferably provided in seven groups, namely: an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component and an A primary color optical component, and the seven groups of monochromatic optical components all have a white light Micro-LED optical engine component; wherein the letters R, G, B, W, C, L, and A represent: red, green, blue, white, azure, lemon, and amber, respectively; Each of the white light Micro-LED optical engine components is connected to the corresponding control circuit module 1 by signal control, each of the white light Micro-LED optical engine components and the corresponding control circuit module 1 are electrically connected to the power drive module 2, each of the control circuit modules 1 is connected to the mainboard control module 3 by signal, and the mainboard control module 3 is connected to the image signal source 23 by signal; wherein, the mainboard control module 3 can receive an external image signal, and / or an external video signal, and / or the mainboard control module 3 reads an image signal stored in itself, and / or a video source signal; it should be noted that the image signal source in this embodiment 1 specifically refers to: an external image signal, an external video signal, an image signal stored in the mainboard control module 3 itself, or a video source signal of the mainboard control module 3; The R primary color optical component, the G primary color optical component, the B primary color optical component, the W primary color optical component, the C primary color optical component and the L primary color optical component share a set of internal light combining optical components 24, and the internal light combining optical components 24 obtain the target light beam after light combining processing and output it to the external objective optical component 25 for projection imaging; In this embodiment, on the one hand, seven white light Micro-LED optical engine components are used, and a beam splitter prism is used in the optical path to perform color separation processing on the white light to generate the required red, green, blue, white, azure, lemon and amber colored lights. Due to the existence of the aforementioned seven colored lights, compared with the traditional projection device, the projector does not need to use a fluorescent wheel to process the blue light beam to generate other colored lights, nor does it need a color wheel to perform color separation processing on the optical path; the optical system does not need similar optical imaging elements such as DMD and LCD; since the light source uses seven white light Micro-LED optical engine components as the light source, which replaces the traditional laser light source, there is no need to use a stray speckle device to process the stray speckle of the laser light source, and the quality of the combined light beam can be improved at the light source; In this embodiment, on the other hand, through the control circuit module and the power drive module, the signal control connection and electrical connection with the corresponding white light Micro-LED optical engine component are used to drive and control the lighting or extinguishing of a single, local or overall Micro LED in a specified area on each white light Micro-LED optical engine component, and a beam splitter prism is used for color separation and light splitting processing. Finally, there are seven color beams in the light path output by the projection device, including red, green, blue, white, azure, lemon, and amber. The colors are rich and meet the requirements of the CIE1931 color space standard. The color gamut is wider and can reach 120% Rec.2020 (BT.2020); In addition, the present embodiment adopts the advanced technology of light-display integration and direct imaging. The white light Micro-LED optical engine component is both the light source of the projection device and the imaging chip of the projection device. There is no need to add additional expensive DMD, LCD or LCOS imaging chips. Since the light source and heat of the present application come from the white light Micro-LED optical engine component, it integrates control, power supply, drive and heat dissipation modules in one. The signal control and conduction heat dissipation of the white light Micro-LED optical engine component can be centralized through the control circuit module, power drive module, mainboard control module and heat dissipation component, making the control module and heat dissipation structure of the projection device simpler, avoiding the complex internal structure of the projection device, high assembly process requirements, high energy consumption, large and bulky technical problems.

[0038] like Figures 1 to 3 As shown, in the above embodiment, preferably, the monochromatic optical components are respectively: R primary color optical component, including a first white light Micro-LED optical engine component 4, a red beam splitter prism 5, and a first refractive lens 6; G primary color optical component, including a second white light Micro-LED optical engine component 7, a green beam splitter prism 8, and a second refractive lens 9; B primary color optical component, including a third white light Micro-LED optical engine component 10, a blue beam splitter prism 11, and a third refractive lens 12; W primary color optical component, including a fourth white light Micro-LED optical engine component 13; C primary color optical component, including a fifth white light Micro-LED optical engine component 14, a cyan beam splitter prism 15, and a fourth refractive lens 16; L primary color optical component, including a sixth white light Micro-LED optical engine component 17, a lemon beam splitter prism 18, and a fifth refractive lens 19; A primary color optical component, including a seventh white light Micro-LED optical engine component 20, an amber beam splitter prism 21, and a sixth refractive lens 22; In this embodiment, seven white light Micro-LED optical engine components are used, and a dichroic prism is used to perform color separation on the white light to generate the required seven color light beams. The colors are rich and meet the requirements of the CIE1931 color space standard. The color gamut is wider and can reach 120% Rec.2020 (BT.2020).

[0039] like Figures 4 to 6 As shown, the above embodiment is further preferably that each of the white light Micro-LED optical engine components includes a substrate 26, a pixel matrix array 27 disposed on the substrate 26 and electrically connected to the substrate 26, and a heat dissipation structure 28 bonded to the substrate 26, a PCBA control board 29 electrically connected to the substrate 26 is bonded to the heat dissipation structure 28, the PCBA control board 29 is electrically connected to the substrate 26 through a metal conductive medium 30, and the PCBA control board 29 is signal-connected to the control circuit module 1; In this embodiment, through the substrate, pixel matrix array, PCBA control board and heat dissipation structure, each white light Micro-LED optical engine component can form a single light source with a stable structure and integrated heat dissipation function, so as to achieve rapid heat dissipation conduction at the light source, and the PCBA control board is electrically connected to the substrate through a metal conductive medium, and the PCBA control board is also connected to the control circuit module signal, so that the single light source can be controlled by the signal of the control circuit, and the pixel matrix array on the substrate can perform the on-off function; In addition, the PCBA control board is physically separated or isolated from the substrate and the pixel matrix array, and the PCBA control board and the substrate are electrically connected only through a metal conductive medium, so that the heat emitted by the pixel matrix array during operation will not affect or be conducted to the PCBA control board and its peripheral components, which can slow down the aging process of the PCBA control board and its peripheral components; In addition, when the pixel matrix array generates heat due to operation, the heat can be conducted to the substrate, and the substrate is bonded to the heat dissipation structure, and the heat dissipation structure can effectively dissipate the heat of the substrate. Furthermore, the PCBA control board is bonded to the heat dissipation structure, which can simultaneously achieve the conduction heat dissipation effect of the PCBA control board, further slowing down the aging process of the PCBA control board and its peripheral components, and improving the working performance.

[0040] like Figures 4 to 6As shown, the above embodiment is further preferably that the pixel matrix array 27 is fixed to the end of the heat dissipation structure 28 through the substrate 26; the pixel matrix array 27 is electrically arranged and combined by a plurality of Micro LEDs 31 in a matrix form on the substrate 26, and the PCBA control board 29 is arranged on the outer peripheral side of the heat dissipation structure 28, and the PCBA control board 29 can drive and control the lighting or extinguishing of a single, local or entire Micro LED 31 in a specified area; wherein the heat dissipation structure 28 can be a block metal heat sink, a fin-type metal heat sink, a metal heat sink embedded with a heat-conducting copper tube, or a water-cooled metal heat sink, and the heat dissipation structure 28 is made of aluminum alloy; In this embodiment, the heat dissipation structure is connected to or bonded with the pixel matrix array and the PCBA control board, so that the heat dissipation structure can contact the pixel matrix array and the PCBA control board, and conduct heat dissipation, so that the pixel matrix array is divided into a plurality of Micro LED 31 matrix arrangement designs. By arranging and combining Micro LEDs in a matrix form on the substrate, the illumination beam can be made more beautiful and neat, and the PCBA control board can light up or turn off a single Micro LED, a designated local area or the entire Micro LED, and can simultaneously light up and turn off a single Micro LED, a designated local area or the entire pattern or image composed of Micro LEDs, so that it is presented on the illuminated object to achieve a uniform effect. The pixel matrix array is set on the substrate and electrically connected to it to ensure the conduction of electrical signals and smooth operation. The pixel matrix array and the substrate are set together at the end of the heat dissipation structure, which can not only dissipate the heat of the pixel matrix array and the substrate, but also does not affect the emission of the illumination light beam and will not produce structural interference.

[0041] like Figures 4 to 6 As shown, the above embodiment is further preferably that the metal conductive medium 30 is a metal conductive pin row, an FPC metal conductive soft board or a metal conductive cable; one end of the metal conductive medium 30 is electrically connected to the substrate 26, and the other end of the metal conductive medium 30 is electrically connected to the PCBA control board 29, and the metal conductive medium 30 is arranged in a plurality of groups, each group of the metal conductive medium 30 is arranged with a plurality of conductors, and the PCBA control board 29 is arranged with a plurality of groups corresponding to the number of the metal conductive medium 30; wherein the metal conductive medium 30 is a square structure adapted to the heat dissipation structure 28, and the metal conductive medium 30 can be designed as a metal conductive curved pin with a 90° angle adapted to the heat dissipation structure 28; In this embodiment, any carrier form of the metal conductive medium has good conductive properties and meets the requirements of the product technical solution. The design of electrically connecting the substrate and the PCBA control board through the metal conductive medium ensures that the substrate and the PCBA control board maintain a good electrical connection and conduction relationship, thereby providing a stable electrical connection basis for the PCBA control board to send electrical signal instructions to the pixel matrix array.

[0042] like Figure 2 and Figure 3 As shown, in the above embodiment, preferably, the internal light combining optical assembly 24 includes a light combining prism 32, a light guiding prism 33, a first light collecting lens 34, a second light collecting lens 35, a light splitting lens 36, a TIRTIR prism 37 and a reflecting lens 38 which are arranged in sequence according to the light path; In this embodiment, the internal light-combining optical components in the projection device are mainly used to process the white light of the same color into light beams of different colors, and ensure that the light beams of different colors are evenly projected onto the illuminated surface. The light-combining prism mainly combines the seven colors of red, green, blue, white, azure, lemon, and amber into a beam of white light. The light-guiding prism is used to adjust the direction of the light path of the white light to ensure that the light enters the subsequent components correctly. The first focusing lens performs preliminary focusing of the white light to reduce scattering. The second focusing lens is used to further focus the white light to improve brightness and clarity. The beam splitting lens decomposes the white light into different seven-color light beams for subsequent processing. The TIR prism uses the principle of total internal reflection to adjust the light path direction of the seven-color light beam and improve the light efficiency. The reflective lens reflects the seven-color light beam to the projection lens to ensure accurate projection. The above components process the light in sequence to ensure that the image output by the projection device is uniform in brightness and accurate in color.

[0043] like Figures 1 to 3 As shown, the above embodiment is further preferred, the external objective optical assembly 25 includes a filter (not shown), an objective lens group (not shown) and a protective lens (not shown), and the objective lens group has a convex lens, a concave lens and an aspherical lens; In this embodiment, through the cooperation of the filter, the objective lens group and the protective lens, the external objective lens optical component can focus the seven-color light beam, correct the aberration, etc. The external objective lens optical component ensures the clarity, brightness and color accuracy of the projected image through the coordinated work of the filter, the objective lens group and the protective lens. Specifically: the filter, which can be preferably an infrared filter and an ultraviolet filter, is used to filter out unnecessary light wavelengths to ensure color accuracy and image quality; the objective lens group, whose convex lens is used to converge light and enhance light intensity, and the concave lens is used to diverge light and correct aberrations, and the aspherical lens can further correct aberrations and improve edge clarity.

[0044] like Figure 2 and Figure 3As shown, in the above embodiment, preferably, along the direction of the optical path, each of the monochromatic optical components, the internal light combining optical component 24 and the external objective optical component 25 are arranged in sequence and are all located on the same optical path; In this embodiment, the components are arranged sequentially along the optical path direction, which can reduce light loss, improve light utilization, reduce aberrations, maintain optical path consistency, avoid light deviation, ensure image stability and consistency, reduce the complexity of the mechanical structure, reduce the risk of image quality being affected by mechanical errors, and have a compact structure and save space.

[0045] like Figure 1 As shown, the above embodiment preferably further includes a heat dissipation component 39, which is disposed in the color digital projection device and performs conduction heat dissipation on the control circuit module 1, the power drive module 2, the mainboard control module 3 and the white light Micro-LED optical engine component. The heat dissipation component 39 adopts one or more of natural air cooling, fan air cooling and liquid cooling according to the power and heat dissipation requirements of the color digital projection device; In this embodiment, the heat dissipation component is arranged inside the projection device, which can simultaneously realize conductive heat dissipation of the control circuit module, the power drive module, and the mainboard control module, so that the internal heat dissipation effect of the projection device is better. In addition, secondary heat dissipation of the white light Micro-LED optical engine component can greatly improve the working efficiency of the light source.

[0046] Example 2

[0047] like Figures 1 to 3 As shown, in one embodiment of the present application, a color digital projection system based on any projection device described in Embodiment 1 is provided, comprising: At least seven groups of monochromatic optical components, each having a white light Micro-LED optical engine component, namely an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component, and an A primary color optical component, for color separation of white light from the white light Micro-LED optical engine component to generate required red, green, blue, white, azure, lemon, and amber colored light; The internal light combining optical component 24 includes a light combining prism 32, a light guiding prism 33, a first light converging lens 34, a second light converging lens 35, a light splitting lens 36, a TIRTIR prism 37 and a reflecting lens 38 which are sequentially arranged according to the optical path, and is used to perform multi-color light synthesis and uniform processing on the holographic light beams of different light types from the seven groups of monochromatic optical components to form a colorful holographic light combining beam; The external objective optical assembly 25 includes a filter, an objective lens group and a protective lens. The objective lens group has a convex lens, a concave lens and an aspherical lens, which is used to focus, adjust and correct the distortion of the colored holographic light beam from the internal light combining optical assembly 24 and then project the image onto the illuminated surface; Along the optical path direction, each of the monochromatic optical components, the internal light combining optical component 24 and the external objective optical component 25 are arranged in sequence and are all located on the same optical path; A control circuit module 1 is connected to the corresponding white light Micro-LED optical engine component signal control to control the lighting or extinguishing of a single, local or entire Micro LED 31 in a specified area on each of the white light Micro-LED optical engine components; A power drive module 2, electrically connected to each of the control circuit modules 1, for supplying power to the control circuit modules 1 and the mainboard control module 3; The mainboard control module 3 is signal-connected to each of the control circuit modules 1, and the mainboard control module 3 is signal-connected to the image signal source to input image signals, video signals and control signals to the control circuit module 1; wherein the mainboard control module 3 can receive external image signals, and / or external video signals, and / or the mainboard control module 3 reads image signals stored in itself, and / or video source signals; it should be noted that the image signal source in this embodiment 2 specifically refers to: external image signals, external video signals, image signals stored in the mainboard control module 3 itself, or video source signals of the mainboard control module 3; A heat dissipation component 39, which is disposed in the color digital projection device and performs conduction heat dissipation on the control circuit module 1, the power drive module 2, the mainboard control module 3 and each white light Micro-LED optical engine component; In this embodiment, seven white light Micro-LED optical engine components are used, and a beam splitter prism is used in the optical path to perform color separation processing on the white light to generate the required red, green, blue, white, azure, lemon, and amber colored lights. Due to the existence of the aforementioned seven colors of light, compared with the traditional projection device, the projector does not need to use a fluorescent wheel to process the blue light beam to generate other colored lights, nor does it need a color wheel to perform color separation processing on the optical path; the optical system does not need similar optical imaging elements such as DMD and LCD; since the light source uses seven white light Micro-LED optical engine components as the light source, which replaces the traditional laser light source, there is no need to use a stray speckle device to process the stray speckle of the laser light source, which can improve the quality of the combined light beam at the light source; Through the control circuit module and the power drive module, the signal control connection and electrical connection with the corresponding white light Micro-LED optical engine component are driven to control the lighting or extinguishing of a single, local or overall Micro LED in a specified area on each white light Micro-LED optical engine component, and a beam splitter prism is used for color separation and light splitting. Finally, there are seven color beams in the light path output by the projection device, including red, green, blue, white, azure, lemon, and amber. Its colors are rich and meet the requirements of the CIE1931 color space standard. Its color gamut is wider and can reach 120% Rec.2020 (BT.2020); It adopts the advanced technology of light-display integration and direct imaging. The white light Micro-LED optical engine component is both the light source of the projection device and the imaging chip of the projection device. It does not need to add additional expensive DMD, LCD or LCOS imaging chips. Since the light source and heat of the present application come from the white light Micro-LED optical engine component, it integrates control, power supply, drive and heat dissipation modules in one. The signal control and conduction heat dissipation of the white light Micro-LED optical engine component can be centralized through the control circuit module, power drive module, mainboard control module and heat dissipation component, making the control module and heat dissipation structure of the projection device simpler, avoiding the complex internal structure of the projection device, high assembly process requirements, high energy consumption, large and bulky technical problems.

[0048] Example 3

[0049] like Figures 1 to 3 and Figure 7 As shown, in one embodiment of the present application, a color digital projection method based on any projection system described in Embodiment 2 is provided, and the method comprises the following steps: Step 1: The seven groups of monochromatic optical components, the internal light combining optical component 24 and the external objective optical component 25 are sequentially arranged on the same optical path in the order of precedence along the optical path direction; Step 2: by connecting the power drive module 2 to electricity, the power drive module 2 powers on the control circuit module 1 and the mainboard control module 3 to work; Step 3: The mainboard control module 3 reads the image signal or video signal and sends the aforementioned signal and control signal to the control circuit module 1. After shaking hands with the mainboard control module, the control circuit module sends a control signal to the seven groups of white light Micro-LED optical engine components to drive and control the lighting or extinguishing of a single, local or overall Micro LED 31 in a specified area on each white light Micro-LED optical engine component, thereby emitting or extinguishing seven groups of holographic light beams with different light types; Step 4: The seven groups of holographic light beams of different light types in the third step are processed by the corresponding primary color optical components, the splitter prism and the refractive lens, and then processed by the internal light combining optical component 24 for multi-color light synthesis, so as to form a colorful holographic light combining beam; Step 5: The colored holographic combined light beam in the fourth step is focused, adjusted and distorted by the external objective optical component 25, and then projected onto the illuminated surface; In the second to fifth steps, the heat dissipation component 39 is disposed in the color digital projection device and performs conduction heat dissipation on the control circuit module 1, the power drive module 2, the mainboard control module 3 and each white light Micro-LED optical engine component; Among them, in the third step, the control circuit module 1 sends a control signal to the seven groups of white light Micro-LED optical engine components on the substrate through the PCBA control board 29.

[0050] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A color digital projection device based on a white light Micro-LED optical engine, characterized in that: The invention comprises at least seven groups of monochromatic optical components, a control circuit module (1), a power drive module (2) and a mainboard control module (3), wherein the monochromatic optical components at least comprise: an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component and an A primary color optical component, and the monochromatic optical components all have a white light Micro-LED optical engine component; Each of the white light Micro-LED optical engine components is connected to the corresponding control circuit module (1) by signal control, each of the white light Micro-LED optical engine components and the corresponding control circuit module (1) are electrically connected to the power drive module (2), each of the control circuit modules (1) is connected to the mainboard control module (3) by signal, and the mainboard control module (3) is connected to the image signal source (23) by signal; The R primary color optical component, the G primary color optical component, the B primary color optical component, the W primary color optical component, the C primary color optical component, the L primary color optical component and the A primary color optical component share a set of internal light combining optical components (24), and the internal light combining optical component (24) obtains a target light beam after light combining processing and outputs it to an external objective lens optical component (25) for projection imaging; The signal is input into the system through the image signal source (23), and a global signal interaction network is constructed through the mainboard control module (3). Signal analysis and initial route allocation are completed based on the communication protocol. During this process, the mainboard control module (3) performs protocol adaptation on the input signal, and transmits the signal to the corresponding functional module in a directional manner according to the preset logic, thereby constructing an initial link for hierarchical processing; the power drive module (2) provides a stable power supply for each module to ensure that the circuit working voltage and power are matched; the control circuit module (1) performs preprocessing on the input signal: signal amplitude standardization is achieved through level conversion, signal clock calibration is completed using a timing circuit, and noise filtering and impedance matching operations are performed at the same time, so that the electrical signal meets the input technical indicators of the optical path processing module.

2. The color digital projection device according to claim 1, characterized in that: The monochromatic optical components are: an R primary color optical component, comprising a first white light Micro-LED optical engine component (4), a red beam splitter prism (5), and a first refractive lens (6); a G primary color optical component, comprising a second white light Micro-LED optical engine component (7), a green beam splitter prism (8), and a second refractive lens (9); a B primary color optical component, comprising a third white light Micro-LED optical engine component (10), a blue beam splitter prism (11), and a third refractive lens (12); a W primary color optical component, comprising a fourth white light Micro-LED optical engine component (13); a C primary color optical component, comprising a fifth white light Micro-LED optical engine component (14), a cyan beam splitter prism (15), and a fourth refractive lens (16); an L primary color optical component, comprising a sixth white light Micro-LED optical engine component (17), a lemon beam splitter prism (18), and a fifth refractive lens (19); and an A primary color optical component, comprising a seventh white light Micro-LED optical engine component (20), an amber beam splitter prism (21), and a sixth refractive lens (22).

3. The color digital projection device according to claim 2, characterized in that: Each of the white light Micro-LED optical engine components comprises a substrate (26), a pixel matrix array (27) disposed on the substrate (26) and electrically connected to the substrate (26), and a heat dissipation structure (28) bonded to the substrate (26); a PCBA control board (29) electrically connected to the substrate (26) is bonded to the heat dissipation structure (28); the PCBA control board (29) is electrically connected to the substrate (26) via a metal conductive medium (30); and the PCBA control board (29) is signal-connected to the control circuit module (1).

4. The color digital projection device according to claim 3, characterized in that: The pixel matrix array (27) is fixed to the end of the heat dissipation structure (28) via the substrate (26); the pixel matrix array (27) is composed of a plurality of Micro LEDs (31) electrically arranged and combined in a matrix form on the substrate (26); the PCBA control board (29) is arranged on the outer peripheral side of the heat dissipation structure (28); the PCBA control board (29) is capable of driving and controlling the lighting or extinguishing of a single Micro LED (31) or a portion of a designated area or the entire Micro LED (31).

5. The color digital projection device according to claim 3, characterized in that: The metal conductive medium (30) is a metal conductive pin header, an FPC metal conductive soft board or a metal conductive cable; one end of the metal conductive medium (30) is electrically connected to the substrate (26), and the other end of the metal conductive medium (30) is electrically connected to the PCBA control board (29); a plurality of groups of the metal conductive medium (30) are provided, each group of the metal conductive medium (30) is provided with a plurality of conductors, and a plurality of PCBA control boards (29) are provided corresponding to the number of groups of the metal conductive medium (30).

6. The color digital projection device according to claim 1, characterized in that: The internal light combining optical component (24) comprises a light combining prism (32), a light guiding prism (33), a first light collecting lens (34), a second light collecting lens (35), a beam splitting lens (36), a TIR prism (37) and a reflecting lens (38) which are arranged in sequence according to the light path. The external objective lens optical component (25) comprises a filter, an objective lens group and a protective lens, wherein the objective lens group comprises a convex lens, a concave lens and an aspherical lens.

7. The color digital projection device according to claim 1, characterized in that: Along the direction of the optical path, each of the monochromatic optical components, the internal light combining optical component (24) and the external objective optical component (25) are arranged in sequence and are all located on the same optical path.

8. The color digital projection device according to claim 1, characterized in that: The device also includes a heat dissipation component (39), which is arranged in the color digital projection device and performs conduction heat dissipation on the control circuit module (1), the power drive module (2), the mainboard control module (3) and the white light Micro-LED optical engine component. The heat dissipation component (39) adopts one or more of natural air cooling, fan air cooling and liquid cooling according to the power and heat dissipation requirements of the color digital projection device.

9. A color digital projection system based on the color digital projection device according to any one of claims 1 to 8, characterized in that: include: At least seven groups of monochromatic optical components, each having a white light Micro-LED optical engine component, the monochromatic optical components at least including: an R primary color optical component, a G primary color optical component, a B primary color optical component, a W primary color optical component, a C primary color optical component, an L primary color optical component, and an A primary color optical component, for color separation of white light from the white light Micro-LED optical engine component to generate required red, green, blue, white, azure, lemon, and amber colored light; The internal light-combining optical component (24) comprises a light-combining prism (32), a light-guiding prism (33), a first light-collecting lens (34), a second light-collecting lens (35), a light-splitting lens (36), a TIR prism (37) and a reflecting lens (38) which are arranged in sequence according to the optical path, and is used to perform multi-color light synthesis and uniform processing on holographic light beams of different light types from the monochromatic optical component, so as to form a colorful holographic light-combining light beam; An external objective optical component (25) comprises a filter, an objective lens group and a protective lens, wherein the objective lens group comprises a convex lens, a concave lens and an aspherical lens, and is used to focus, adjust and correct the distortion of the color holographic light beam from the internal light combining optical component (24) and then project the image onto the illuminated surface; Along the direction of the optical path, each of the monochromatic optical components, the internal light combining optical component (24) and the external objective optical component (25) are arranged in sequence and are all located on the same optical path; A control circuit module (1) connected to a corresponding white light Micro-LED optical engine component for signal control, for controlling the lighting or extinguishing of a single, partial or entire Micro LED (31) in a designated area on each of the white light Micro-LED optical engine components; A power drive module (2) electrically connected to each of the control circuit modules (1) for supplying power to the control circuit module (1) and the mainboard control module (3); A mainboard control module (3) is signal-connected to each of the control circuit modules (1); the mainboard control module (3) is signal-connected to an image signal source (23) for inputting image signals, video signals and control signals to the control circuit modules (1); A heat dissipation component (39), the heat dissipation component (39) being arranged in the color digital projection device and performing conduction heat dissipation on the control circuit module (1), the power drive module (2), the mainboard control module (3) and each white light Micro-LED optical engine component.

10. A color digital projection method using the color digital projection system according to claim 9, characterized in that: The following steps are involved: The first step is to sequentially arrange the monochromatic optical component, the internal light combining optical component (24) and the external objective optical component (25) on the same optical path in a sequential order along the direction of the optical path; Step 2: by connecting the power drive module (2) to electricity, the power drive module (2) supplies electricity to the control circuit module (1) and the mainboard control module (3) to start operation; Step 3: the mainboard control module (3) reads the image signal or video signal and sends the above-mentioned signal and control signal to the control circuit module (1); the control circuit module shakes hands with the mainboard control module and sends the control signal to the seven groups of white light Micro-LED optical engine components, driving and controlling the lighting or extinguishing of a single, local or whole Micro LED (31) in a designated area on each white light Micro-LED optical engine component, thereby emitting or extinguishing seven groups of holographic light beams with different light types; Step 4: The seven groups of holographic light beams with different light patterns in the third step are processed by the corresponding light splitting prism and the refractive lens in the primary color optical component, and then processed by the internal light combining optical component (24) for multi-color light synthesis and uniformity, thereby forming a colorful holographic light combining light beam; Step 5: The colored holographic combined light beam in the fourth step is focused, adjusted and rectified for distortion by an external objective optical component (25) and then projected onto the illuminated surface; In the second to fifth steps, a heat dissipation component (39) is arranged in the color digital projection device and performs conduction heat dissipation on the control circuit module (1), the power drive module (2), the mainboard control module (3) and each white light Micro-LED optical engine component; In the third step, the control circuit module (1) sends a control signal to seven groups of white light Micro-LED optical engine components on the substrate via the PCBA control board (29).

Images