LED direct display projection method, system and device

Abstract

The invention relates to an LED direct display projection method, system and device. The method comprises the following steps: receiving image signal input and analyzing an image signal; performing picture analysis on the analyzed image signal and generating a driving signal; partitioning each frame of received picture, wherein each partition corresponds to a matrix path; gray value analysis of R, G and B colors is carried out on each pixel in the partitions; the driving module drives the plurality of LED lamp beads to move once along a set matrix path according to the speed signal, and meanwhile, the LED driving module drives the plurality of LED lamp beads according to the partitions and the gray value data; by means of the method, the number of needed lamp beads can be greatly reduced, the size is reduced, meanwhile, the display brightness and the resolution ratio are guaranteed, the color accuracy and the image definition are guaranteed, and meanwhile a series of problems of low contrast ratio, short service life of a bulb, poor color rendition degree, large size, poor heat dissipation and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of LED direct display projection, and more specifically, to an LED direct display projection method, system and device. Background Art

[0002] A projector is a display device that projects images or videos onto a screen or other flat surface. It magnifies and projects images through an optical system and is widely used in conference rooms, classrooms, home theaters, and other occasions. Projectors are mainly divided into two categories based on technical principles: DLP (digital light processing) and LCD (liquid crystal display). Among them, LCD projectors form images by decomposing images into red, green, and blue. Each color passes through an independent LCD panel and then is projected onto the screen through a lens system. This technology ensures color accuracy and image clarity, but the disadvantages are low contrast, short lamp life, poor color reproduction, large size, and poor heat dissipation.

[0003] Currently used LED direct display solutions mostly use rotating screens, which can solve the above-mentioned problems of low contrast, short bulb life, poor color reproduction and poor heat dissipation to a certain extent, but it also has major defects: 1. The lamp beads are too large and the intervals are very wide. When high resolution is required, they are often very large or require multiple units to cooperate, which is not conducive to installation; 2. The host computer needs to encode the video image first; 3. The image is incomplete in the 1-2 seconds when the motor is just started, because the motor speed has not yet started, so the initial picture perception is very poor. If the rotation speed is increased and then the lamp beads are turned on, the human eye will see a dazzling shadow and the real object behind. If the screen is not full, the real object behind will also be seen, which limits its application scenarios; 4. In addition, the existing rotating LED screen will have a rotating shadow, and the high-speed picture will be torn. Based on the above reasons, a more reasonable LED direct display solution is needed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an LED direct display projection method, an LED direct display projection system and an LED direct display projection device in view of the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A LED direct display projection method is constructed, wherein the method comprises a plurality of LED lamp beads arranged in a matrix and a driving module for driving the plurality of LED lamp beads to move along a set matrix path; the method comprises the following steps:

[0007] Receiving image signal input and analyzing the image signal;

[0008] Perform image analysis on the parsed image signal and generate a driving signal: divide each received frame into partitions, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors R, G, and B for each pixel in the partition; send the analyzed partition and grayscale value data to the LED driver module, and generate a speed signal based on the image refresh frequency and send it to the driver module;

[0009] The driving module drives multiple LED lamp beads to move once along the set matrix path according to the speed signal. At the same time, the LED driving module drives multiple LED lamp beads according to the partition and grayscale value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame.

[0010] The LED direct display projection method of the present invention further comprises the steps of:

[0011] The direct display light effect of each frame is projected through an optical lens.

[0012] In the LED direct display projection method of the present invention, the LED lamp bead is switched on and off once each time the LED lamp bead moves one pixel.

[0013] In the LED direct display projection method of the present invention, the switching frequency G of the LED lamp beads is calculated using the formula:

[0014] G = N * P;

[0015] Where N is the number of pixels covered by the matrix path, and P is the screen refresh frequency;

[0016] The number M of the LED lamp beads is calculated using the formula:

[0017] M = Q / N;

[0018] Among them, Q is the total number of pixels of the picture.

[0019] In the LED direct display projection method described in the present invention, the direction of the path in which the driving module drives the lamp beads to move in the cardinal frame image is opposite to the direction of the path in which the driving module drives the lamp beads to move in the even frame image.

[0020] In the LED direct display projection method of the present invention, the method for distinguishing between cardinality frames and even-numbered frames is as follows:

[0021] After each screen frame is output, an IO pin is used to pull a high level, and the back-end collects and obtains the number of high levels. The first acquisition is the cardinal frame, and the second acquisition is the even frame. When the count reaches the even frame, the count is cleared.

[0022] In the LED direct display projection method of the present invention, the method for distinguishing between cardinality frames and even-numbered frames is as follows:

[0023] Count from the beginning of receiving the picture frame. After a frame contains a total number of pixels, it is the first frame. At this time, count once for the cardinal frame, and the second time for the even frame. When the count reaches the even frame, the count is cleared.

[0024] An LED direct display projection system, used to implement the LED direct display projection method as described above, wherein the system comprises a plurality of LED lamp beads arranged in a matrix and a driving module for driving the plurality of LED lamp beads to move along a set matrix path, and further comprises a scaler module, an image processing module, an LED driving module and an optical lens;

[0025] The Scaler module is used to receive image signal input and analyze the image signal;

[0026] The image processing module is used to perform image analysis on the parsed image signal and generate a driving signal: partition each received frame, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors of R, G, and B on each pixel in the partition; send the analyzed partition and grayscale value data to the LED driving module, and generate a speed signal based on the image refresh frequency and send it to the driving module;

[0027] The driving module drives the multiple LED lamp beads to move once along the set matrix path according to the speed signal, and at the same time, the LED driving module drives the multiple LED lamp beads according to the partition and gray value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame of the picture;

[0028] The optical lens projects the direct display light effect of each frame.

[0029] The LED direct display projection system of the present invention, wherein the driving module comprises a mounting frame, a circuit board is arranged at the inner bottom of the mounting frame, a positioning frame located above the circuit board is arranged on the inner wall of the mounting frame, an annular movable groove is arranged on the inner wall of the positioning frame, an aluminum alloy plate is movably arranged in the movable groove, a plurality of the LED lamp beads are fixed on the aluminum alloy plate in a matrix, and the LED lamp beads are electrically connected to the circuit board through wires;

[0030] The movable groove is provided with an X-axis support foot that provides elastic force in the X-axis direction to the aluminum alloy plate and a Y-axis support foot that provides elastic force in the Y-axis direction to the aluminum alloy plate, the X-axis support foot and the Y-axis support foot both include a plurality of fixed cylinders fixed to the inner wall of the positioning frame, a support rod and a spring that provides elastic force to the support rod are movably provided in the fixed cylinder, a first positioning wheel is rotatably provided at the end of the support rod, and a first positioning groove for positioning the aluminum alloy plate is provided on the circumferential side of the first positioning wheel;

[0031] The mounting frame is provided with an X-axis push rod for pushing the aluminum alloy plate to move along the X-axis, a first electric push rod for driving the X-axis push rod, a Y-axis push rod for pushing the aluminum alloy plate to move along the Y-axis, and a second electric push rod for driving the Y-axis push rod, the X-axis push rod and the Y-axis push rod are both slidably connected to the inner wall of the movable groove, and a row of second positioning wheels are provided on the rod body, and the circumference of the second positioning wheel is provided with a second positioning groove for positioning the aluminum alloy plate;

[0032] Glass beads for absorbing vibration and pressing the surface of the aluminum alloy plate are arranged on both side walls of the movable groove.

[0033] An LED direct display projection device, wherein the device is provided with the LED direct display projection system as described above.

[0034] The beneficial effect of the present invention is that by applying the method of the present application, each lamp bead corresponds to a plurality of pixel points distributed in a matrix, and the lamp bead is driven to move by a driving module to complete the lighting operation of the plurality of pixel points, which can greatly reduce the number of lamp beads required, reduce the volume while ensuring the display brightness and resolution. This technology ensures the accuracy of color and the clarity of the image, while overcoming a series of problems such as low contrast, short bulb life, poor color reproduction, large volume and poor heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0036] Figure 1 This is a flow chart of the LED direct display projection method of a preferred embodiment of the present invention;

[0037] Figure 2 This is an example diagram of a pixel inverse mapping method of an LED direct display projection method according to a preferred embodiment of the present invention;

[0038] Figure 3 This is an example diagram illustrating the principle of the LED direct display projection method of a preferred embodiment of the present invention;

[0039] Figure 4 This is an example diagram of synchronously controlling the display and movement of lamp beads by the LED direct display projection method of a preferred embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of an optional lamp bead scanning method of the LED direct display projection method of a preferred embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the LED direct display projection method of a preferred embodiment of the present invention;

[0042] Figure 7 This is a principle block diagram of an LED direct display projection system according to a preferred embodiment of the present invention;

[0043] Figure 8 is a cross-sectional view of a driving module of an LED direct display projection system according to a preferred embodiment of the present invention;

[0044] Fig. 9 It is a schematic diagram of driving an aluminum alloy plate of an LED direct display projection system according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0046] The LED direct display projection method of the preferred embodiment of the present invention is as follows: Figure 1 See also Figure 2-Figure 6 , comprising a plurality of LED lamp beads arranged in a matrix and a driving module for driving the plurality of LED lamp beads to move along a set matrix path; the method comprises the following steps:

[0047] S01: receiving image signal input and analyzing the image signal;

[0048] The image signal is not limited to HDMI, TypeC, DP, but can also be USB, AHD, AV, YpbPr, CVBS, SDI, DVI, etc., and the image scaling can be completed to output LVDS, EDP, VBO, MIPI, TTL, Tcom and other signals to the image processing module, regardless of brand and model;

[0049] S02: Perform image analysis on the parsed image signal and generate a driving signal: divide each received frame into partitions, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors of R, G, and B on each pixel in the partition; send the analyzed partition and grayscale value data to the LED driving module, and generate a speed signal based on the image refresh frequency and send it to the driving module;

[0050] Image processing: Receive Scaler, LVDS, EDP, VBO, MIPI, TTL, Tcom and other signals, perform image analysis, first receive a frame of image and partition it, for example, a 1920*1080 image is divided into N*M sizes, assuming that each lamp bead is responsible for 9 pixels, then it is divided into 1920 / 3=640, that is, 640 partitions in the horizontal direction, 1080 / 3=360 in the vertical direction, 360 partitions. So the formula is 1920 / N*1080 / M partitions.

[0051] Another reason is that this solution is a direct display method, not a scanning method like the traditional LCD, so all data needs to be sent concurrently, that is, 1920 / N*1080 / M data needs to be sent to the LED driver module at the same time, and the LED driver module also needs to drive the corresponding lamp beads at the same time. Therefore, the image processing module needs to analyze the grayscale values ​​of the three colors R, G, and B of each pixel, that is, the image processing module needs 1920 / N*1080 / M IOs to send data (the "regular zero code" regular zero code method can be used to transmit data) to the RGB lamp beads;

[0052] Another key point is that the image module needs to synchronously control the running speed of the drive module motor. The color of the lamp bead corresponds to the pixel point it moves to. Let's take 1920*1080*60Hz as an example. 60Hz means 60 refreshes in 1 second, so the formula for calculating the motor movement speed is: unit time / refresh rate. In other words, N*M pixels are completed within 16 mm. Then the formula is 16 / (N*M)=Y, which is the time required to move one pixel. Assuming the pixel spacing is 2 microns, we call it X, then the formula is Y / X=Z, the speed of the motor movement;

[0053] Pixel demapping method is as follows Figure 2 As shown:

[0054] Starting frame (base) scanning order RGBBGGBGB;

[0055] Even frame scan order RBGRGBGRG, do reverse mapping

[0056] The non-reverse mapping even frame scanning order is GRGRBGRGBR, which requires the motor to return to the starting position every time in an even frame.

[0057] Of course, in actual display, it is unlikely that all colors will be monochrome at any time. The above example is only for the convenience of explaining the operating principle.

[0058] The image processing module is mainly based on FPGA, without any specific brand or restrictions.

[0059] S03: The driving module drives the multiple LED lamp beads to move once along the set matrix path according to the speed signal. At the same time, the LED driving module drives the multiple LED lamp beads according to the partition and gray value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame of the picture;

[0060] The LED driver module needs 1920 / N*1080 / M IOs to send data (the "regular zero code" regular zero code method can be used) to light up the RGB lamp beads;

[0061] The drive module can adopt the existing XY axis drive mechanism (such as Figure 6 As shown, a motor is used as a driving source), and the following structural forms (using an electric push rod as a driving source) may also be used, which are not limited to this and all belong to the protection scope of this application;

[0062] S04: projecting the direct display light effect of each frame through an optical lens (the required lens can be selected according to the actual application scenario);

[0063] By applying the method of the present application, each lamp bead corresponds to multiple pixel points distributed in a matrix. The driving module is used to drive the lamp beads to move to complete the lighting operation of multiple pixel points. The number of lamp beads required can be greatly reduced, and the display brightness and resolution can be guaranteed while reducing the volume. This technology ensures the accuracy of color and clarity of the image, while overcoming a series of problems such as low contrast, short bulb life, poor color reproduction, large volume and poor heat dissipation.

[0064] like Figure 3 As shown, taking 1920*1080@60Hz as an example, the screen is 16:9, then the conversion is 1920 / 16=120, 1080 / 9=120, which is a rectangular screen of 120*120=14400 pixels, that is to say, an RGB three-color light needs to scan 14400 pixels.

[0065] So a 1920*1080@60Hz picture requires 16*9=144 lamp beads, and each pixel requires 60Hz, which is the 60Hz picture we see.

[0066] The conversion is 14400*60Hz=864000Hz, which means that LED lamp beads with a switching frequency of 864KHz are required. You may not be able to find such lamp beads, but you can continue to increase the number of lamp beads to reduce the switching frequency of the LED lamp beads.

[0067] For example, the algorithm is 1920 / 640=3, 1080 / 360=3. At this time, a rectangular screen with 3*3=9 pixels is obtained, which means that an RGB three-color light needs to scan 9 pixels.

[0068] So a 1920*1080@60Hz picture requires 640*360=230,400 LEDs, and each pixel requires 60Hz, which is the 60Hz picture we see.

[0069] The conversion is 9*60Hz=540Hz, which means that LED lamp beads with a switching frequency of 540Hz are required. From this, it can be inferred that it can support 1080 images with a frequency exceeding 60Hz, and the number of lamp beads can be reduced to save costs.

[0070] Each color in the nine-square grid is an RGB three-color light, which means that each light is responsible for 9 pixels. The original position of the light is the first pixel in the upper left corner of the nine-square grid. The arrow represents the movement trajectory of the lamp bead, and the return trajectory is the movement in the opposite direction of the arrow.

[0071] The current picture shows two lamp beads in the H and V directions. If we calculate according to this arrangement based on a 1920*1080 picture, there are 640 lamp beads in the H direction and 360 lamp beads in the V direction. The arrangement does not have to follow this picture, as long as the movement trajectory is the same and the frequency does not exceed the switching frequency of the lamp beads. Therefore, the conclusion is that N rows * M columns = picture pixels (1920*1080).

[0072] Figure 3 The values ​​in the table represent the number of pixels, which shows that this is not a complete picture. Explanation: 1920 / 3=640, that is, there are 640 lamp beads in the horizontal direction, and 1080 / 3=360 in the vertical direction. There are 360 ​​lamp beads.

[0073] Lamp bead scanning method: the current frame is the cardinal frame moving from top to bottom, and the even frame moves from bottom to top. Since the movement order will be reversed back and forth, the image processing module is required to perform pixel analysis and reverse the order.

[0074] It should be noted that there is a dynamic refresh rate in the industry. Assuming that the image processing module detects a change in the frame rate, it will dynamically adjust the electric drive speed. This dynamic adjustment is generated by the graphics card and synchronized to the image processing module through Scaler analysis. Dynamic refresh rate technology can effectively reduce screen tearing and stuttering, and improve the smoothness of game and multimedia playback.

[0075] The difference between this part and the existing technology is that the image module needs to analyze the cardinality and even frames to control the movement trajectory of the motor and the synchronization of RGB colors.

[0076] Preferably, the method for distinguishing the cardinal number frames and the even number frames is as follows:

[0077] Method 1: The front-end Scaler uses an IO to pull a high level after each frame of the output image is finished. The back-end image module collects the number of high levels. The first acquisition is a cardinal frame, and the second is an even frame. When the count reaches an even frame, it is cleared once. Repeat this process.

[0078] Method 2: The image processing module starts counting from the moment it receives the image. For example, 1920*1080 pixels are counted from one pixel to 1920*1080 pixels as the first frame. At this time, it is counted once, which is the cardinal frame, and the second time is the even frame. When the even frame is counted, it is cleared once. Repeat this process.

[0079] An example of synchronously controlling the display and movement of the lamp beads is as follows:

[0080] like Figure 4 As shown, taking N(3)*M(3) partition as an example, the resolution is 1920*1080*60Hz. 60Hz means 60 refreshes in 1 second, so the formula for calculating the motor movement speed is: ((1 second / refresh rate) / (N*M)) / X)=Z, which means that N*M pixels are completed in about 16 mm.

[0081] Then the formula is 16 / (N*M)=Y, which is the time required to move one pixel. Assuming the pixel pitch is 2 microns, we call it X, then the formula is Y / X=Z, the speed of the motor movement. At the same time, the image processing module needs to send color data 9 times within Z time. Each time the motor moves, the color of the lamp changes once. During the movement, the lamp will be turned off once to remove the afterglow effect. When scanning the lamp, the image module needs to count. When it reaches N*M times, it will be cleared to prepare for the next frame.

[0082] When encountering a dynamic refresh rate, the speed will speed up or slow down. 1 second / refresh rate, this can be reflected when analyzing the base even frame. 90 frames in 1S and 60 frames in 1S, the number of base even frames will increase, which means the speed will be faster, so the motor movement speed will be faster, and the color data will be sent faster.

[0083] Of course, the scanning method of the lamp beads can also be as follows Figure 5 As shown in the figure: when the base frame is finished, turn off the light and quickly return to the first pixel to scan the second frame. It can be seen that the round trip method is more effective. Every time a pixel is moved, the lamp bead needs to be turned on and off once to avoid afterglow. This part is not achieved on the existing rotating LED screen;

[0084] Both of the above methods can make the motor run in one direction. When the image refresh rate is high, the reciprocating method is better.

[0085] An LED direct display projection system is used to implement the LED direct display projection method as described above, such as Figure 7 As shown, the system includes a plurality of LED lamp beads arranged in a matrix (arranged on an RGB lamp board 6) and a driving module 1 for driving the plurality of LED lamp beads to move along a set matrix path, and also includes a scaler module 2, an image processing module 3, an LED driving module 4 and an optical lens 5;

[0086] Scaler module 2, used for receiving image signal input and analyzing the image signal;

[0087] The image processing module 3 is used to perform image analysis on the parsed image signal and generate a driving signal: partition each received frame, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors of R, G, and B for each pixel in the partition; send the analyzed partition and grayscale value data to the LED driving module 4, and generate a speed signal based on the image refresh frequency and send it to the driving module;

[0088] The driving module 1 drives multiple LED lamp beads to move once along the set matrix path according to the speed signal. At the same time, the LED driving module drives multiple LED lamp beads according to the partition and gray value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame of the picture;

[0089] Optical lens 5, projects the direct display light effect of each frame;

[0090] In the system of the present application, each lamp bead corresponds to multiple pixel points distributed in a matrix. The driving module is used to drive the lamp beads to move to complete the lighting operation of multiple pixel points. The number of lamp beads required can be greatly reduced, and the display brightness and resolution can be guaranteed while reducing the volume. This technology ensures color accuracy and image clarity, while overcoming a series of problems such as low contrast, short bulb life, poor color reproduction, large volume and poor heat dissipation. For the specific principles and instructions, please refer to the description in the above method and will not be repeated here.

[0091] In addition to the existing XY axis mechanism that can implement this solution, this application also provides a new drive module structure that is more suitable for the scenario of this application, such as Figure 8 See also Fig. 9 , specifically:

[0092] The driving module includes a mounting frame 10, a circuit board 11 is arranged at the inner bottom of the mounting frame 10, a positioning frame 12 located above the circuit board 11 is arranged on the inner wall of the mounting frame 10, an annular movable groove 120 is arranged on the inner wall of the positioning frame 12, an aluminum alloy plate 13 is movably arranged in the movable groove 120, a plurality of LED lamp beads 130 are fixed on the aluminum alloy plate 13 in a matrix, and the LED lamp beads 130 are electrically connected to the circuit board 11 through wires 131 (margin needs to be left);

[0093] An X-axis support foot 14 for providing elastic force in the X-axis direction to the aluminum alloy plate 13 and a Y-axis support foot 15 for providing elastic force in the Y-axis direction to the aluminum alloy plate 13 are arranged in the movable groove 120. Both the X-axis support foot 14 and the Y-axis support foot 15 include a plurality of fixed cylinders 140 fixed to the inner wall of the positioning frame 10. A support rod 141 and a spring 143 for providing elastic force to the support rod 141 are movably arranged in the fixed cylinder 140. A first positioning wheel 142 is rotatably arranged at the end of the support rod 141. A first positioning groove for positioning the aluminum alloy plate 13 is arranged on the peripheral side of the first positioning wheel 142.

[0094] The mounting frame 10 is provided with an X-axis push rod 16 for pushing the aluminum alloy plate 13 to move along the X-axis, a first electric push rod 17 for driving the X-axis push rod, a Y-axis push rod 18 for pushing the aluminum alloy plate 13 to move along the Y-axis, and a second electric push rod 19 for driving the Y-axis push rod. The X-axis push rod 16 and the Y-axis push rod 18 are both slidably connected to the inner wall of the movable groove 120, and a row of second positioning wheels 160 are provided on the push rod body, and a second positioning groove for positioning the aluminum alloy plate 13 is provided on the peripheral side of the second positioning wheel 160;

[0095] Glass beads 121 for absorbing vibrations and pressing on the surface of the aluminum alloy plate are arranged on both side walls of the movable groove 120;

[0096] The structural method of applying this application combines the following features:

[0097] 1. The RGB light board is split into two parts, the circuit board 11 and the aluminum alloy board 13, and the two parts are connected by wires. In this way, when driving multiple lamp beads to move, it is not necessary to drive the entire RGB light board to move, which can greatly reduce the operating load of the driving module and reduce power consumption;

[0098] 2. The aluminum alloy plate 13 is strong, light, and has excellent heat dissipation function. The wind generated by the movement of the aluminum alloy plate 13 can quickly take away the heat generated by the lamp beads;

[0099] 3. The aluminum alloy plate 13 is floated and positioned by relying on a plurality of first positioning wheels 142 and a plurality of second positioning wheels 160 to reduce friction, and the aluminum alloy plate 13 is also absorbed by a plurality of glass beads 121 on both sides to absorb the inertial force generated by vibration and movement, thereby ensuring stability;

[0100] The new structure formed by the combination of the above three functions can be well applied to the driving operation of the lamp beads in this solution, and can increase the upper limit of the number of lamp beads that can be used for movable adjustment, which is unattainable by the traditional XY-axis mechanism (the more lamp beads there are, the heavier the lamp board is, the greater the inertia of movement is, and it will also bring serious heat accumulation problems. The above structure can handle these problems well and increase the upper limit of the product).

[0101] An LED direct display projection device, wherein the device is provided with the LED direct display projection system as described above; it can be understood that the device may include professional projection equipment such as projectors, and may also include electrical appliances and components with projection functions.

[0102] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A LED direct display projection method, characterized in that: It includes a plurality of LED lamp beads arranged in a matrix and a driving module for driving the plurality of LED lamp beads to move along a set matrix path; The method comprises the following steps: Receiving image signal input and analyzing the image signal; Perform image analysis on the parsed image signal and generate a driving signal: divide each received frame into partitions, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors R, G, and B for each pixel in the partition; send the analyzed partition and grayscale value data to the LED driver module, and generate a speed signal based on the image refresh frequency and send it to the driver module; The driving module drives multiple LED lamp beads to move once along the set matrix path according to the speed signal. At the same time, the LED driving module drives multiple LED lamp beads according to the partition and grayscale value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame.

2. The LED direct display projection method according to claim 1, characterized in that: The method further comprises the steps of: The direct display light effect of each frame is projected through an optical lens.

3. The LED direct display projection method according to claim 1, characterized in that: Each time the LED lamp bead moves one pixel, the LED lamp bead switches on and off once.

4. The LED direct display projection method according to claim 1, characterized in that: The switching frequency G of the LED lamp bead adopts the formula: G = N * P; Where N is the number of pixels covered by the matrix path, and P is the screen refresh frequency; The number M of the LED lamp beads is calculated using the formula: M = Q / N; Among them, Q is the total number of pixels of the picture.

5. The LED direct display projection method according to claim 1, characterized in that: The direction of the path in which the driving module drives the lamp beads to move during the cardinal number frame images is opposite to the direction of the path in which the driving module drives the lamp beads to move during the even number frame images.

6. The LED direct display projection method according to claim 5, characterized in that: The method used to distinguish between cardinal frames and even frames is: After each screen frame is output, an IO pin is used to pull a high level, and the back-end collects and obtains the number of high levels. The first acquisition is the cardinal frame, and the second acquisition is the even frame. When the count reaches the even frame, the count is cleared.

7. The LED direct display projection method according to claim 5, characterized in that: The method used to distinguish between cardinal frames and even frames is: Count from the beginning of receiving the picture frame. After a frame contains a total number of pixels, it is the first frame. At this time, count once for the cardinal frame, and the second time for the even frame. When the count reaches the even frame, the count is cleared.

8. An LED direct display projection system, used to implement the LED direct display projection method according to any one of claims 1 to 7, characterized in that: The system includes a plurality of LED lamp beads arranged in a matrix and a driving module for driving the plurality of LED lamp beads to move along a set matrix path, and also includes a scaler module, an image processing module, an LED driving module and an optical lens; The Scaler module is used to receive image signal input and analyze the image signal; The image processing module is used to perform image analysis on the parsed image signal and generate a driving signal: partition each received frame, each partition corresponds to a matrix path; perform grayscale value analysis of the three colors of R, G, and B on each pixel in the partition; send the analyzed partition and grayscale value data to the LED driving module, and generate a speed signal based on the image refresh frequency and send it to the driving module; The driving module drives the multiple LED lamp beads to move once along the set matrix path according to the speed signal, and at the same time, the LED driving module drives the multiple LED lamp beads according to the partition and gray value data, so that each LED lamp bead displays the corresponding color when it moves to the corresponding pixel position, completing the direct display of each frame of the picture; The optical lens projects the direct display light effect of each frame.

9. The LED direct display projection system according to claim 8, characterized in that: The driving module comprises a mounting frame, a circuit board is arranged at the inner bottom of the mounting frame, a positioning frame located above the circuit board is arranged on the inner wall of the mounting frame, an annular movable groove is arranged on the inner wall of the positioning frame, an aluminum alloy plate is movably arranged in the movable groove, a plurality of the LED lamp beads are fixed on the aluminum alloy plate in a matrix, and the LED lamp beads are electrically connected to the circuit board through wires; The movable groove is provided with an X-axis support foot that provides elastic force in the X-axis direction to the aluminum alloy plate and a Y-axis support foot that provides elastic force in the Y-axis direction to the aluminum alloy plate, the X-axis support foot and the Y-axis support foot both include a plurality of fixed cylinders fixed to the inner wall of the positioning frame, a support rod and a spring that provides elastic force to the support rod are movably provided in the fixed cylinder, a first positioning wheel is rotatably provided at the end of the support rod, and a first positioning groove for positioning the aluminum alloy plate is provided on the circumferential side of the first positioning wheel; The mounting frame is provided with an X-axis push rod for pushing the aluminum alloy plate to move along the X-axis, a first electric push rod for driving the X-axis push rod, a Y-axis push rod for pushing the aluminum alloy plate to move along the Y-axis, and a second electric push rod for driving the Y-axis push rod, the X-axis push rod and the Y-axis push rod are both slidably connected to the inner wall of the movable groove, and a row of second positioning wheels are provided on the rod body, and the circumference of the second positioning wheel is provided with a second positioning groove for positioning the aluminum alloy plate; Glass beads for absorbing vibration and pressing the surface of the aluminum alloy plate are arranged on both side walls of the movable groove.

10. An LED direct display projection device, characterized in that: The device is provided with an LED direct display projection system as described in any one of claims 8-9.

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