WO2006053475A1

WO2006053475A1 - Image projecting system and operational method thereof

Info

Publication number: WO2006053475A1
Application number: PCT/CN2005/001308
Authority: WO
Inventors: Dongzuo Yang
Original assignee: Dongzuo Yang
Priority date: 2004-11-19
Filing date: 2005-08-22
Publication date: 2006-05-26
Also published as: CN1779548A; CN100514174C

Abstract

An image projecting system and operational method thereof are disclosed. The system comprises three or more light-emitters, a rotating mirror having multilayered and multifaceted structure, and a display screen, wherein each facet mirror in the same layer of the rotating mirror has different tilting angle with respect to the rotating axis of the rotating mirror, and each light-emitter corresponds to each layer of the rotating mirror. In operation, First, light emitted from the first light-emitter is reflected and scanned, via the first facet mirror in the first layer of the rotating mirror, onto the display screen to form the first scanning line of the image to be displayed. Next, the rotating mirror is rotated such that the light emitted from the first light-emitter is reflected and scanned onto the display screen to form the second scanning line. Such-and-such, the light emitted sequentially from the first light-emitter forms line-and-line a portion of image via all facet mirrors in the first layer of the rotating mirror. The first light-emitter is then turned off and the second light-emitter is turned on, and similarly, another portion of image is formed through the second light-emitter and all facet mirrors in the second layer of the rotating mirror. This is repeatedly done such that all light-emitters are used. The invention has advantages that the system has greater number of pixel points and higher definition than that of the conventional one.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image projection system and a light working method, and relates to a high definition image projection system and a light working method. BACKGROUND OF THE INVENTION In the existing video projection system, an electron beam tube CRT projector, a liquid crystal light valve projector, and a large-screen LED display screen are combined to occupy the market with their respective advantages. However, for any development mode, high-definition image projection systems are required to enable the array of light sources to be arranged on the display screen. Therefore, it is better to scan the display screen. Patent Application No. 03101375.9, which provides a partitioned multi-line scanning laser projector that uses a plurality of rows of simultaneously scanned beam columns to perform image partitioned line scanning, and a large number of modulatable laser arrays are used in the device. , light valve array structure. In this type of equipment, with a large number of lasers, the hardware cost of the required light source is enormous, and at the same time, a large number of lasers need to be controlled, and the software part of the control is quite complicated. In addition, as for the patent application No. 01103170.0, a video developing device is provided, which is composed of a pixel storage controller, a light-emitting driving board, a light collecting output device, an optical scanner, an image display screen, and the like, on the light-emitting driving board. A three-primary light-emitting unit having the same number of pixels as one row or one column is provided, each of the three primary color light-emitting units is composed of three primary color light-emitting devices, and the light-collecting output device is composed of a plurality of tree-shaped light collectors having three branches. The number of the tree concentrators is the same as the number of the three primary color illuminating units, and each of the dendritic concentrators corresponds to one of the three primary illuminating units, and the light emitted by the three single primary illuminating devices is from the corresponding dendritic optical fiber. The three branches of the concentrator enter the tree-shaped fiber concentrator for color mixing. The output ends of all the tree-shaped fiber concentrators are arranged in a row in sequence. The image display screen is composed of a plurality of fibers arranged regularly, and the number of fibers is The number of pixels of one frame of image is an integer squared speed relationship. In this way, thousands of light-emitting units are required as illuminators, and the cost of raw materials for production is enormous. At the same time, the installation of thousands of parts is complicated, and in addition, the dendritic fiber concentrator Production is quite difficult, and the effect of the light transmitted by the fiber is reflected again. SUMMARY OF THE INVENTION It is an object of the present invention to provide an image projection system with a sharpness, which can greatly reduce the required image The number of illuminators is simple, low cost and reliable.

Another object of the present invention is to provide a method for operating an image projection system having a direct optical path and a simple structure. An image projection system for achieving the object of the present invention includes an illuminator, a rotating mirror, and a display screen. The illuminator has three or more illuminators, and the rotating mirror is a multi-edge multi-layer mirror, and a single mirror of each layer is opposite. The angle of inclination of the rotating shaft of the rotating mirror is different from that of other mirrors of the same layer, and each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror, and the reflected light from the rotating mirror is incident on the display screen. The image is formed, and the product of the number of illuminators and the number of mirrors of the rotating mirror is greater than 750.

As an improvement, the image of the final image of the image projection system is more than 750 lines of light, and the multi-layered multi-face mirror is tapered, and the illuminator is a true color pixel tube, which is red and green. , blue three primary color light source.

As a specific mode of the image projection system of the present invention, there are 20 illuminators, and the rotating mirror is divided into 20 layers of multi-edge multi-layer mirrors, 54 mirrors per layer, and inclination angle of each mirror. The angle of inclination is different from that of other mirrors; each illuminator corresponds to a layer mirror of a multi-layer multi-layer mirror, and the light emitted by each illuminator is reflected by the multi-layer multi-layer mirror and then injected into the display screen to form ' image.

A light working method for realizing an image projection system of the present invention is characterized in that three or more illuminators are provided, and the rotating mirror is a multi-edge multi-layer mirror, and a single mirror of each layer is opposite to the rotating mirror The angle of inclination of the rotating shaft is different from that of other mirrors in the same layer, and each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror; first, the light emitted by the first illuminator passes through the first layer of the rotating mirror The first mirror is scanned and scanned to form a first line. Thereafter, the rotating mirror is turned to the second mirror and then reflected to the display screen to form a second row. The rotating mirror rotates in turn, and the first illuminator sequentially emits light through the first After the layer mirror reflects, an image is formed on the display screen one by one; the first illuminator is turned off after scanning the first layer mirror, and the second illuminator is turned on; the second illuminator emits light through the first layer of the second layer of the rotating mirror The mirror reflection scans to the display screen to form a line. Thereafter, the rotating mirror is turned to the second layer second mirror and then reflected to the display screen to form a second row of scanning lines. The rotating mirror rotates in turn, and the second illuminator sequentially emits light through the first Two levels After reflection, images are formed on the display screen one by one; this is repeated until all the illuminators respond to all the mirrors to perform reflection on the display screen; the number of lines imaged on the display screen is greater than 750 lines, and the system is in 1 second. A scan of the scanning surface of 25 or more times per unit time is performed, and a scanning projection frequency of the scanning surface of 25 times or more per second is formed. The illuminator operates at least 800 times per illuminator for each scan line.

As a specific mode of the optical working method of the present invention, the image projection system has 20 illuminators, the multi-edge multi-layer mirror has 20 layers, and the number of mirrors per layer is 54, and the entire multi-edge multi-layer mirror is tapered. The angle of inclination of one mirror is different from each other; the illuminator emits light at a frequency of 1920 times per unit of mirror per scan; first, The light emitted by the first illuminator is reflected by the first mirror of the first layer of the rotating mirror to the display screen to form a scanning line of the first 1920 points, the rotating mirror is rotated through the second mirror of the first layer, and the first illuminator emits light. The second mirror of the first layer of the rotating mirror is reflected to the display screen to form a second scanning line of 1920 points; the light emitted by the first illuminator sequentially completes the reflection scanning of the first layer of the multi-layer multi-layer mirror. 54 scanning lines are scanned on the display screen; after the first illuminator completes the scanning of the first layer, the first illuminator is turned off, the second illuminator is turned on, and the second illuminator emits light through the second mirror After the first mirror of the layer reflects, the 55th scanning line is formed. Like the first illuminator, the light emitted by the second illuminator also scans 54 scanning lines after one revolution of the multi-layer multi-layer mirror; the second illuminator After the second layer scan is completed, the second illuminator is turned off, and the third illuminator is turned on to start scanning the third layer mirror of the multi-layer multi-layer mirror; the system sequentially completes 20 illuminators corresponding to the 20-layer mirror of the multi-layer multi-layer mirror Reflection scan work, display a total of scan on the display The line 1080, a scanning surface is formed; completed scanning system 30 scans the surface in a unit time of 1 second, to form the scanning frequency projection 30 times per second scan plane.

A light working method for realizing another image projection system of the present invention is provided with three or more illuminators, wherein the rotating mirror is a multi-edge multi-layer mirror, and the single mirror of each layer is opposite to the rotating shaft of the rotating mirror The angle of inclination is different from that of other mirrors in the same layer. Each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror; when working, each layer of illuminators emits light at the same time, and the light emitted by each illuminator Corresponding to the first mirror of the mirror layer, the scan is scanned to form a corresponding first row of scan lines. Thereafter, when the mirror is turned to the second mirror of each layer, the mirror is reflected to form a corresponding second row of scan lines. The rotating mirror rotates in turn, and the light emitted by each illuminator is reflected by each corresponding layer mirror to form a scanning line on the display screen one by one. After the rotating mirror rotates one turn, all the illuminators are reflected on the display screen corresponding to all the mirrors. Form a complete image picture; the number of lines imaged on the display screen is more than 750 lines, the system scans the scanning surface 25 times or more in a unit time of 1 second, forming a scan of 25 times or more per second. The scanning frequency projection. The illuminator illuminates at least 800 times each time a illuminator is formed.

As a specific working method of the present invention, there are 20 illuminators, 20 layers of multi-edge multi-layer mirrors, 54 planes per layer, and the entire multi-edge multi-layer mirror is tapered, and the inclination angle of any mirror is mutually The illuminator emits 1920 times of frequency per mirror time per unit of illumination; during operation, the light emitted by each illuminator is reflected by the first mirror of the corresponding layer of the rotating mirror to the display screen to form respective illuminators corresponding to each illuminator The first scanning line of 1920 points, the rotating mirror is rotated through the second mirror surface of each layer, and the illuminators are illuminated by the corresponding mirror of the rotating mirror, and the second mirror is reflected to the display screen to form the second strip corresponding to each illuminator. 1920-bit scanning lines; the light emitted by each illuminator completes the reflection scanning of the multi-layer multi-layer mirror, and scans corresponding 54 scanning lines on the display screen; the system completes 20 illuminators corresponding to the multi-edge multi-faceted surface The mirror scan of the 20-layer mirror of the mirror, a total of 1080 lines are scanned on the display screen to form a scanning surface; the system performs a total of 30 scans of the scanning surface in a unit time of 1 second. Trace, the scanning projection frequency of the scanning surface 30 times per second is formed.

The image projection system of the invention has a high number of pixel points, and can produce a high-definition video display effect; at the same time, the position of the light-emitting device is fixed and reliable, and the polygon mirror of the multi-layer multi-layer mirror is simple in structure and convenient to manufacture. The cost is low; the light-emitting device generates less heat and completely solves the heat dissipation problem; the whole system is small in size and high in reliability, and can realize large-format display. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the operation of a first embodiment of the present invention.

Figure 2 is a schematic view showing the operation of the second embodiment of the present invention.

Figure 3 is a schematic view showing the operation of the third embodiment of the present invention.

Figure 4 is a schematic view showing the operation of the fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION Example 1

As shown in FIG. 1 , the number of illuminators of an image projection system is three, the number of layers of the multi-edge multi-layer mirror is three, and the number of mirrors per layer of the multi-layer multi-layer mirror 5 is 250 (attached) Not clearly shown in the figure, only 10 mirrors are shown as schematic explanations, and the number of lines scanned is 750. The angle of inclination of the single mirror of each layer with respect to the axis of rotation of the rotating mirror is different from that of the other mirrors of the same layer, and each illuminator corresponds to each of the mirror layers of the multi-sided multilayer mirror. The illuminator illuminates 800 times each time a illuminator is formed.

First, the light emitted by the first illuminator 6 is reflected by the first mirror 11 of the first layer of the rotating mirror to the display screen 3 to form a first row, and each row forms 800 image sites. Thereafter, the rotating mirror is turned to the second mirror 12 and then reflected to the display screen 3 to form a second row. The rotating mirror rotates in turn, and the light emitted by the first illuminator 6 sequentially passes through the first layer mirror and is imaged on the display screen 3 one by one. The first illuminator 6 is turned off after scanning the first layer mirror, and the second illuminator 7 is turned on; the light emitted by the second illuminator is reflected by the first mirror 21 of the second layer of the rotating mirror to the display screen 3 A row is formed. Thereafter, the rotating mirror is transferred to the second layer second mirror 22 and then reflected to the display screen 3 to form a second row. The rotating mirror rotates in turn, and the second illuminator 7 sequentially emits light through the second layer mirror one by one. The image on the display screen 3 is formed; after the second illuminator 7 is finished, the third illuminator 8 starts to work, and the mirror of the third layer is scanned, and the light emitted by the third illuminator 8 passes through the third layer of the rotating mirror. The first mirror 31 reflects and scans to the display screen 3 to form a row. Thereafter, the rotating mirror is turned to the third layer second mirror 32 and then reflected to the display screen 3 to form a second row. The rotating mirror rotates in turn, and the third illuminator 8 The sequentially emitted light passes through the second layer mirror and is imaged on the display screen 3 one by one; all the illuminators perform image reflection on the display screen 3 corresponding to all the mirrors; the number of lines imaged on the display screen 3 is 750 In the row, the system performs a total of 25 scans of the scanning surface in a unit time of 1 second, forming a scanning projection frequency of the scanning surface 25 times per second.

Example 2

As shown in FIG. 2, an image projection system includes an illuminator, a multi-layer multi-face mirror 5 having 20 layers (four layers are shown), and 20 illuminators (four shown), respectively. Corresponding to each mirror of the multi-layered multi-face mirror 5, the number of each layer of the multi-layer multi-layer mirror is 54 (not clearly shown in the drawing, only 10 mirrors are shown as schematic explanation), and the entire polygon is more The mirror of the layer is tapered, and the angles of inclination of any mirror are different from each other; the illuminator emits light at a frequency of 1920 times per unit of scanning per unit of illumination.

First, the light 4 emitted by the first illuminator 6 is reflected by the first mirror 11 of the first layer of the rotating mirror to the display screen 3 to form a scanning line of the first 1920 points, and the rotating mirror is rotated through the first mirror of the first layer. 12, the first illuminator emits a second mirror emitted from the first layer of the rotating mirror to the display screen 3 to form a second scanning line of 1920 points; the light emitted by the first illuminator sequentially completes the multi-layered multi-faceted surface The first layer of the mirror is scanned for scanning, and 54 scanning lines are scanned on the display screen 3. After the first illuminator 6 completes the scanning of the first layer, the first illuminator 6 is turned off, and the second illuminator 7 is turned on. The light emitted by the second illuminator 7 is reflected by the second layer first mirror 21 of the rotating mirror to form a 55th scanning line. Like the first illuminator 6, the second illuminator 7 emits light in multiple edges. After the mirror is turned over one week, 54 scanning lines are also scanned; after the second illuminator 7 completes the second layer scanning, the second illuminator 7 is turned off, and the third illuminator 8 is turned on to start scanning the third layer of the multi-layer multi-layer mirror. The first mirror, ... the fourth illuminator 9 is turned on to start scanning the multi-sided multi-layer mirror The fourth layer mirror, ... the system sequentially completes the reflection scanning operation of 20 illuminators corresponding to the 20-layer mirror of the multi-layer multi-layer mirror, and displays a total of 1080 lines on the display screen 3 to form a scanning surface; A total of 30 scans of the scanning surface are completed in a unit of time per second, forming a scanning projection frequency of the scanning surface 30 times per second.

Example 3

As shown in FIG. 3, an image projection system has three illuminators, three multi-layer multi-layer mirrors, and two multi-layer multi-mirror mirrors each having 250 mirrors ( Not clearly shown in the drawing, only 10 mirrors are shown as schematic explanations, and the number of lines scanned is 750. The angle of inclination of the single mirror of each layer with respect to the axis of rotation of the rotating mirror is different from that of the other mirrors of the same layer, and each illuminator corresponds to each mirror layer of the multi-layered multilayer mirror. The illuminator illuminates the number of times the illuminator operates 800 times each time a scan line is formed. In operation, the three illuminators 6, 7, 8 are simultaneously illuminated, and the illuminators 6, 7, 8 each emit light through the first layer of the first mirror 11 and the second layer of the first mirror 21 of the corresponding mirror layer, The third layer first mirror 31 is reflected and scanned to the display screen 3 to form respective corresponding first row scan lines. Thereafter, when the mirror is turned to the second mirror of each layer, the illuminators 6, 7, 8 are each emitted. The light is reflected and reflected by the first layer first mirror 12 and the second layer first mirror 22 of the corresponding mirror layer, and the third layer first mirror 32 is reflected and reflected to the display screen 3 to form corresponding second row scan lines. The rotating mirror rotates in turn, and the light emitted by each illuminator is reflected by each corresponding layer mirror to form a scanning line on the display screen one by one. After the rotating mirror rotates one turn, all the illuminators are reflected on the display screen corresponding to all the mirrors. 3 forms a complete image picture; the number of lines imaged on the display screen 3 is 750 lines, and the system performs a total of 25 scans of the scanning surface in a unit time of 1 second, forming a scan of the scanning surface 25 times per second. Projection frequency. The illuminator illuminates 800 times per illuminator each time a scan line is formed.

Example 4

As shown in FIG. 4, an image projection system includes an illuminator, a multi-layer multi-face mirror 5 having 20 layers (four layers are shown), and 20 illuminators (four shown), respectively. Corresponding to each mirror of the multi-layered multi-face mirror 5, the number of each layer of the multi-layer multi-layer mirror is 54 (not clearly shown in the drawing, only 10 mirrors are shown as schematic explanation), and the entire polygon is more The mirror of the layer is tapered, and the angles of inclination of any mirror are different from each other; the illuminator emits light at a frequency of 1920 times per unit of scanning per unit of illumination.

In operation, the light 4 emitted by the illuminators 6, 7, 8, 9 is reflected by the corresponding first mirrors 11, 21, 31, 41 of the rotating mirror 5 to the display screen 3 to form the respective first 1920 sites. Scanning line, the rotating mirror 5 is rotated through the second mirrors 12, 22, 32, 42 of each layer. The illuminators of the respective illuminators are reflected by the corresponding mirror of the rotating mirror, and the second mirror is reflected to the display screen 3 to form a second 1920 reflecting the corresponding layer. Scanning line of the spot; the light emitted by each of the illuminators 6, 7, 8, 9 completes the reflection scanning of the multi-layer multi-layer mirror, and scans corresponding 54 scanning lines on the display screen 3; the system completes 20 illuminators Corresponding to the reflection scanning operation of the 20-layer mirror of the multi-layer multi-layer mirror, a total of 1080 lines are scanned on the display screen 3 to form a scanning surface; the system performs scanning of the scanning surface 30 times in a unit time of 1 second. , forming a scanning projection frequency of the scanning surface 30 times per second.

Claims

An image projection system comprising an illuminator, a rotating mirror and a display screen, wherein the illuminator has one or more illuminators, the rotating mirror is a multi-layer multi-layer mirror, and each layer has a single mirror The angle of inclination of the rotating shaft relative to the rotating mirror is different from that of other mirrors of the same layer. Each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror, and the reflected light from the rotating mirror is incident on the display screen. The image is formed thereon, and the product of the number of illuminators and the number of mirrors of the rotating mirror is at least 750.

2. The image projection system according to claim 1, wherein the number of lines of light finally incident on the display screen is at least 750 lines, the multi-layered multi-face mirror is tapered, and the illuminator is true color. The pixel tube is composed of three primary colors of red, green and blue.

3. The image projection system according to claim 2, wherein said illuminator has 20, said rotating mirror is a multi-edge multi-layer mirror divided into 20 layers, and each layer of mirrors is 54 each side. The angle of inclination of the mirror is different from the angle of inclination of the other mirrors; each illuminator corresponds to a layer mirror of the multi-layered multi-face mirror.

4. An image projection system light working method, characterized in that an illuminator is provided with one or more illuminators, the rotating mirror is a multi-edge multi-layer mirror, and a single mirror of each layer is opposite to a rotating shaft of the rotating mirror The angle of inclination is different from that of other mirrors in the same layer, and each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror; first, the light emitted by the first illuminator passes through the first layer of the mirror A mirror reflection scans to the display screen to form a first line. Thereafter, the rotating mirror is turned to the second mirror and then reflected to the display screen to form a second row. The rotating mirror rotates in turn, and the first illuminator sequentially emits light through the first layer. After the mirror reflection, an image is formed on the display screen one by one; the first illuminator is turned off after scanning the first layer mirror, and the second illuminator is turned on; the second illuminator emits light through the first side of the second layer of the rotating mirror The mirror reflection scans to the display screen to form a line. Thereafter, the rotating mirror is turned to the second layer second mirror and then reflected to the display screen to form a second line of scanning lines. The rotating mirror rotates in turn, and the second illuminator sequentially emits light through the second After the mirror reflection, one by one Forming an image on the display screen; repeating until all illuminators respond to all of the mirrors for reflection on the display screen; the number of lines imaged on the display screen is at least 750 lines, and the system is in unit time of 1 second. Scanning of the scanning surface 25 times or more is completed to form a scanning projection frequency of the scanning surface 25 times or more per second.

5. The image projection system light operation method according to claim 4, wherein the illuminator emits at least 800 times of illuminating operation each time a scanning line is formed.

6. The image projection system optical operation method according to claim 5, wherein the illuminator is 20, the multi-edge multi-layer mirror is 20 layers, and the number of mirrors per layer is 54, and the entire multi-layer multi-layer mirror is In the shape of a cone, the angle of inclination of any mirror is different from each other; the illuminator emits light at a frequency of 1920 times per unit of scanning per unit of illumination; first, the light emitted by the first illuminator is reflected by the first mirror of the first layer of the rotating mirror The first 1920-position scanning line is formed on the display screen, and the rotating mirror is rotated through the first second mirror surface, and the first illuminator is reflected by the second mirror of the first layer of the rotating mirror to the display screen to form a second a scanning line of 1920 points; the light emitted by the first illuminator sequentially performs the reflection scanning of the first layer of the multi-layer multi-layer mirror, and scans 54 scanning lines on the display screen; the first illuminator completes the first After the scanning of the layer, the first illuminator is turned off, the second illuminator turns on the light, and the light emitted by the second illuminator is reflected by the first layer mirror of the second layer of the rotating mirror to form the 55th scanning line, and the first illuminator Same as the second illuminator The light also scans 54 scanning lines after one revolution of the multi-layer multi-layer mirror; after the second illuminator completes the second layer scanning, the second illuminator is turned off, and the third illuminator is turned on to start scanning the multi-layer multi-layer mirror The three-layer mirror; the system sequentially completes the reflection scanning of 20 illuminators corresponding to the 20-layer mirror of the multi-layer multi-layer mirror, and displays a total of 1080 lines on the display screen to form a scanning surface; the system is in unit time of 1 second. The scan of the scanning surface was completed 30 times in total, and the scanning projection frequency of the scanning surface 30 times per second was formed.

7. An image projection system light working method, characterized in that an illuminator is provided with one or more than one illuminator, the rotating mirror is a multi-edge multi-layer mirror, and a single mirror of each layer is opposite to a rotating shaft of the rotating mirror The angle of inclination is different from that of other mirrors in the same layer. Each illuminator corresponds to each mirror layer of the multi-layer multi-layer mirror; when working, each layer of illuminators emits light at the same time, and the light emitted by each illuminator The first mirror corresponding to the mirror layer is scanned to the display screen to form respective first row scan lines corresponding to the respective illuminators, and then, when the mirror is turned to the second mirror of each layer, the mirror is reflected to the display screen to form each illuminating Corresponding to the respective second row of scanning lines, the rotating mirror rotates in turn, and the light emitted by each illuminator is reflected by each corresponding layer mirror to form a scanning line on the display screen one by one. After the rotating mirror rotates one turn, all the illuminators correspond to All the mirrors are reflected on the display to form a complete image; the number of lines imaged on the display is at least 750 lines, and the system completes 25 times or more in a unit time of 1 second. The scanning of the scanning surface forms a scanning projection frequency of the scanning surface 25 times or more per second.

8. The image projection system light operation method according to claim 7, wherein the illuminator emits at least 800 times of illuminating operation each time a scanning line is formed.

9. The image projection system optical operation method according to claim 8, wherein the illuminator is 20, the multi-layer multi-layer mirror is 20 layers, the number of mirrors per layer is 54, and the entire multi-layer multi-layer mirror is a cone. Shape, the inclination angle of any mirror is different from each other; the illuminator performs 1920 times of frequency illumination per mirror unit time; the light emitted by each illuminator is reflected by the first mirror of the corresponding layer of the rotating mirror to the display screen to form a corresponding The first scanning line of the first 1920 points, the rotating mirror is rotated through the second mirror surface of each layer, and each illuminator is illuminated by the corresponding mirror of the rotating mirror, and the second mirror is reflected to the display screen to form the illuminators reflected by the corresponding layer. Corresponding respective second scanning lines of 1920 points; the light emitted by each illuminator completes the reflection scanning of the multi-layer multi-layer mirror, and scans corresponding 54 scanning lines on the display screen; the system completes 20 illuminations Corresponding to the reflection scanning operation of the 20-layer mirror of the multi-layer multi-layer mirror, a total of 1080 lines are scanned on the display to form a scanning surface; the system completes 30 times in a unit time of 1 second. Scanning the scanning surface, a projection is formed scanning frequency of 30 times per second scan plane.