MIMI LED halo elimination method and display screen system

Abstract

The invention relates to an MIMI LED halo elimination method and a display screen system.The human head position is detected through a millimeter wave radar, if the human head position is located in an effective area, a self-adaptive halo elimination mode is entered, and according to the human head position information, it is judged that the current human head is located at the left-side position or the right-side position of the central axis of the effective area; obtaining a distance and a deviation angle between the head of the human body and the display equipment; controlling the deflection adjusting unit to correspondingly adjust the sub lamp panel according to the calculated deflection angle and deflection adjusting direction; controlling the LED driving module to correspondingly adjust the brightness of the sub lamp panel according to the calculated brightness; the method comprises the following steps: performing automatic halo elimination adjustment in a targeted manner according to the angle and the position of a current viewer, if a plurality of viewers are distributed on the left side and the right side of a display screen, entering a mode of not considering the angles of the viewers, and simply performing halo elimination.

Description

Technical Field

[0001] The present invention relates to the technical field of MIMI LED halo elimination, and more specifically, to a MIMI LED halo elimination method and a display screen system. Background Art

[0002] Mini LED improves the brightness, contrast, and color reproduction of picture quality, and saves energy on a relative basis, while also increasing its lifespan. The halo of Mini LED display devices is most likely to occur at 1. the junction of black and white or color images due to the playback content, and 2. the other is due to the viewing angle of the viewer. The halo will be very obvious when viewed from an angle.

[0003] The MIMI LED halo elimination solutions currently used are mostly developed for the first situation, but there is no good solution for the second situation. A MIMI LED halo elimination method and display system that can better address the second situation while taking the first situation into consideration is needed to fill the gap in the industry. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a MIMI LED halo elimination method for the above-mentioned defects of the prior art, and also provide a display screen system using the method.

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

[0006] A MIMI LED halo elimination method is constructed, which includes the following steps:

[0007] The MIMI LED light panel of the display device using MIMI LED as the backlight source is divided into a plurality of sub-light panels distributed in a matrix, with a gap between two adjacent sub-light panels, and connected by an opaque soft film, and a deflection adjustment unit capable of adjusting the deflection angle of each sub-light panel is provided;

[0008] According to the detection range of the millimeter-wave radar configured on the display device, the front area of ​​the display device is divided into a blind area and an effective area;

[0009] The millimeter-wave radar detects the position of the human head. If the human head is in the blind spot, the LED driver module turns off the MIMI LED backlight.

[0010] If the head of the person is in the effective area, the adaptive halo elimination mode is entered. The following operations are performed in the adaptive halo elimination mode:

[0011] Obtain the display image information and the human head position information in real time; determine the sub-light board currently affected by the halo based on the display image information; determine whether the current human head is located on the left side or the right side of the central axis of the effective area based on the human head position information, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment;

[0012] According to the current position of the human head at the left side or right side of the central axis of the effective area, the deflection adjustment direction of the sub-light board is determined to be right or left.

[0013] Calculate the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and control the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction;

[0014] The brightness of the sub-light board currently affected by the halo is calculated according to the distance between the human head and the display device, and the LED driving module is controlled according to the calculated brightness to adjust the brightness of the sub-light board accordingly.

[0015] The MIMI LED halo elimination method of the present invention, wherein the offset angle of the sub-lamp panel currently affected by the halo is calculated based on the offset angle of the human head from the display device using:

[0016] Z = eX + f;

[0017] Among them, Z is the offset angle of the sub-light panel currently affected by the halo, e and f are constants, and X is the offset angle of the human head from the display device.

[0018] The MIMI LED halo elimination method of the present invention, wherein the brightness of the sub-light panel currently affected by the halo is calculated based on the distance between the human head and the display device using:

[0019] M = cY + d;

[0020] Among them, M is the brightness of the sub-light panel currently affected by the halo, c and d are constants, and Y is the distance between the human head and the display device.

[0021] The MIMI LED halo elimination method of the present invention, wherein the blind area includes a close-range detection blind area, a long-range detection blind area, and an invalid area;

[0022] The close-range detection blind area is an area whose horizontal distance from the display device is less than a first set value;

[0023] The long-distance detection blind area is an area whose horizontal distance from the display device is greater than a second set value; the second set value is greater than the first set value;

[0024] The invalid area is the detection blind area of ​​the millimeter-wave radar located on the left and right sides of the valid area.

[0025] The MIMI LED halo elimination method of the present invention, wherein, if there are human bodies on both the left and right sides of the central axis of the effective area, the tilt adjustment method is adjusted according to the set tilt adjustment method:

[0026] If the sub-light panels around the sub-light panel affected by the halo are not affected by the halo, multiple sub-light panels around the sub-light panel affected by the halo are adjusted to tilt inwardly toward the side of the sub-light panel affected by the halo at a set angle;

[0027] If there are multiple sub-lamp panels affected by the halo and they form a semi-ring or a ring, the sub-lamp panels affected by the halo are adjusted to tilt outwards at a set angle away from the sub-lamp panel at the center of the semi-ring or the ring.

[0028] The MIMI LED halo elimination method described in the present invention, wherein the deflection adjustment unit includes a rotating frame that limits the deflection direction of the sub-lamp board to the X-axis and the Z-axis, an elastic reset member that resets the sub-lamp board, a turntable that pushes the sub-lamp board to deflect along the X-axis and the Z-axis, and a micro motor that drives the turntable.

[0029] The MIMI LED halo elimination method described in the present invention, wherein the rotating frame includes a central axis fixed to the display back plate, and an end portion of the central axis away from the display back plate is rotatably provided with a first rotating axis rotating along the X-axis and a first concave limit seat rotatably connected to the first rotating axis; a second rotating axis rotating along the Z-axis and a second concave limit seat rotatably connected to the second rotating axis is rotatably provided on the side of the first rotating axis away from the central axis; the second rotating axis is fixedly connected to the sub-lamp panel.

[0030] The MIMI LED halo elimination method described in the present invention, wherein, the first concave limit seat is provided with a first rotating shaft pin rotatably connected to the first rotating shaft, and the second concave limit seat is provided with a second rotating shaft pin rotatably connected to the second rotating shaft; the elastic reset member includes a first torsion spring sleeved on the first rotating shaft pin for resetting the first rotating shaft and a second torsion spring sleeved on the second rotating shaft pin for resetting the second rotating shaft.

[0031] The MIMI LED halo elimination method described in the present invention, wherein, both ends of the first rotating shaft are provided with a first action block, both ends of the second rotating shaft are provided with a second action block, and the side surfaces of the two first action blocks and the two second action blocks close to the turntable are coplanar; the turntable is rotatably arranged on the central axis, the outer surface of the turntable is provided with a gear ring, and the movable end of the micro motor is provided with a gear meshing with the gear ring; the turntable is provided with an extrusion slope for extruding the two first action blocks and the two second action blocks.

[0032] A display screen system, used to implement the MIMI LED halo elimination method as described above, wherein the system includes a MIMI LED light board, a display screen, a deflection adjustment unit, a millimeter wave radar, a scaler module and an LED driving module;

[0033] The MIMI LED light panel is divided into a plurality of sub-light panels distributed in a matrix, with a gap between two adjacent sub-light panels, and connected by an opaque soft film, and the deflection adjustment unit can adjust the deflection angle of each sub-light panel;

[0034] The millimeter wave radar is used to detect the position of the human head and output the detection result to the Scaler module;

[0035] The Scaler module divides the front area of ​​the display device into a blind area and an effective area; receives the millimeter wave radar detection result, and if the position of the human head is located in the blind area, the LED driver module turns off the MIMI LED backlight; if the position of the human head is located in the effective area, enters the adaptive halo elimination mode, and performs the following operations in the adaptive halo elimination mode:

[0036] Obtain display image information and human head position information in real time;

[0037] Determine the sub-light board currently affected by the halo according to the displayed image information;

[0038] According to the human head position information, determine whether the current human head is located on the left side or the right side of the central axis of the effective area, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment;

[0039] Determine the deflection adjustment direction of the sub-light panel to be right or left according to the left side position or right side position of the central axis of the effective area where the human head is currently located;

[0040] Calculate the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and control the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction;

[0041] The brightness of the sub-light board currently affected by the halo is calculated according to the distance between the human head and the display device, and the LED driving module is controlled according to the calculated brightness to adjust the brightness of the sub-light board accordingly.

[0042] The beneficial effect of the present invention is that by applying the method of the present application, the halo can be automatically eliminated according to the angle and position of the current viewer, while also taking into account the function of automatically turning the screen black if there is no viewer. In addition, if there are multiple viewers and they are distributed on the left and right sides of the display screen, a mode is entered that does not consider the viewer's angle, and simply performs halo elimination. Compared with the existing halo elimination method, the method of the present application is more reasonable and can effectively improve the display effect of the MIMI LED screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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:

[0044] Figure 1 is a flow chart of the MIMI LED halo elimination method of a preferred embodiment of the present invention;

[0045] Figure 2 Schematic diagram of blind area distribution of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0046] Figure 3 This is a first halo elimination example diagram of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0047] Figure 4 This is a second halo elimination example diagram of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0048] Figure 5 This is a third halo elimination example diagram of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0049] Figure 6 1. It is a schematic diagram of the soft film connection of the sub-lamp board of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0050] Figure 72 is a cross-sectional view of the structure of the deflection adjustment unit of the MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0051] Figure 8 1 is a top view of a turntable of a MIMI LED halo elimination method according to a preferred embodiment of the present invention;

[0052] Fig. 9 It is a principle block diagram of a display screen system according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0053] 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.

[0054] The MIMI LED halo elimination method of the preferred embodiment of the present invention is as follows: Figure 1 See also Figure 2-Figure 8 , including the following steps:

[0055] S01: Divide the MIMI LED light board of the display device using MIMI LED as the backlight source into multiple sub-light boards distributed in a matrix (multiple lamp beads can be set on a single sub-light board), with a gap between two adjacent sub-light boards, and connected by an opaque soft film (see Figure 6 , the backs of adjacent sub-light panels are connected by a soft film), and a deflection adjustment unit is configured to adjust the deflection angle of each sub-light panel;

[0056] S02: Divide the front area of ​​the display device into a blind area and an effective area according to the detection range of the millimeter wave radar configured on the display device;

[0057] S03: Detect the position of the human head through the millimeter wave radar. If the human head is located in the blind spot, the LED driver module turns off the MIMI LED backlight;

[0058] S04: If the human head is located in the effective area, the adaptive halo elimination mode is entered. The following operations are performed in the adaptive halo elimination mode:

[0059] S05: Acquire the display image information and the human head position information in real time; determine the sub-light board currently affected by the halo according to the display image information; determine whether the current human head is located at the left side or right side of the central axis of the effective area according to the human head position information, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment;

[0060] S06: Determine the deflection adjustment direction of the sub-light panel to be right or left according to the current position of the human head at the left side or right side of the central axis of the effective area.

[0061] S07: calculating the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and controlling the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction;

[0062] S08: Calculating the brightness of the sub-light board currently affected by the halo according to the distance between the human head and the display device, and controlling the LED driving module to adjust the brightness of the sub-light board accordingly according to the calculated brightness;

[0063] By applying the method of the present application, the halo can be automatically eliminated according to the angle and position of the current viewer, while also taking into account the function of automatically turning the screen black if there are no viewers. In addition, if there are multiple viewers and they are distributed on the left and right sides of the display screen, the mode is entered without considering the viewer's angle, and the halo is simply eliminated. The method of the present application is more reasonable than the existing halo elimination method and can effectively improve the display effect of the MIMI LED screen.

[0064] The blind spots include a short-range detection blind spot, a long-range detection blind spot, and an invalid area; the short-range detection blind spot is an area where the horizontal distance from the display device is less than a first set value; the long-range detection blind spot is an area where the horizontal distance from the display device is greater than a second set value; the second set value is greater than the first set value; the invalid area is the detection blind spot of the millimeter-wave radar located on the left and right sides of the effective area.

[0065] The waveform of millimeter wave emission is roughly a cone. The range of the cone can be determined by the lens. Then millimeter wave also has a blind spot, which is about 2 cm. That is to say, the human body cannot be recognized when there is only 2 cm between the millimeter wave physical module and the human body. There is also a long distance greater than about 10 meters. That is to say, the human body cannot be recognized when there is more than 10 meters between the millimeter wave physical module and the human body. When the human body is within the blind spot, the image module notifies the LED driver to turn off the light, one is to protect the human eye, and the other is to save energy;

[0066] like Figure 2 As shown, A is the display device, E is the short-distance detection blind area, D is the long-distance detection blind area, B and C are invalid areas, the cone formed by A1, B1, and C1 is the millimeter wave detection range, the angle formed is 180 degrees, and D1 is the center point from A1 to C1;

[0067] Set A to E1 to 30 cm, which is set according to the display device size and the optimal viewing distance range. Set E1 to A1 to 10 meters, which is set according to the maximum detection distance of the millimeter wave radar. Set F to the human head, which is a point. According to the radar measurement of the up-down distance / 2 and the left-right distance / 2, the intersection is a dot;

[0068] In case 1, when the human body is not within the range of A1, B1, C1, it is considered a blind area, so the image module notifies the LED driver to turn off the mini LED backlight;

[0069] Case 2: How to determine the position of the human body;

[0070] Assuming that the angle between A1 and C1 is 160 degrees, then with D1 as the center, the left and right are 80 degrees, A1 to D1 is 0-80 degrees, D1 to C1 is 80-160 degrees, when the angle of F is 0-80, it is viewed from the left, and the light board affected by the halo tilts to the right. When the angle of F is 80-160, it is viewed from the right, and the light board affected by the halo tilts to the left.

[0071] Set the angle as X, the distance as Y, Z as the tilt angle of the light board, and M as the brightness of the light.

[0072] When X is fixed, the larger Y is, the smaller Z is, and the brighter M is. Assuming Y is 1 meter, Z is tilted 5 degrees. When Y is 10 meters, Z is tilted 1 degree. Assuming Y is 1 meter, M is 200. When Y is 10 meters, M is 1000.

[0073] When Y is fixed, X is between 0-80 degrees, when X is equal to 0, Z is 10 degrees, and M is 1000. When X is equal to 80, Z is 0 degrees, and M is 200;

[0074] The offset angle of the sub-light panel currently affected by the halo is calculated based on the offset angle between the human head and the display device:

[0075] When Y is fixed, and X is between 0 and 80 degrees, let Z = eX + f;

[0076] When X=0, Z=10; when X=80, Z=0;

[0077] Substituting it into the relationship, we get the system of equations

[0078] From the first equation, we can get f = 10. Substituting f = 10 into the second equation 0 = 80e + 10, we get

[0080] but Among them, Z is the offset angle of the sub-light panel currently affected by the halo, e and f are constants and will change according to actual installation and debugging; X is the offset angle of the human head from the display device;

[0081] The brightness of the sub-light panel currently affected by the halo is calculated based on the distance between the human head and the display device:

[0082] Assume that the relationship between distance Y and brightness M is M=cY+d.

[0083] When Y=1, M=200; when Y=10, M=1000.

[0084] Substituting it into the relationship, we get the system of equations

[0085] Subtract the first equation 200=c+d from the second equation 1000=10c+d to obtain 1000-200=(10c+d)-(c+d).

[0086] That is, 800 = 10c + dcd, simplifying to 800 = 9c, solving to

[0087] Will Substituting 200=c+d, we get Solved

[0089] but

[0090] Among them, M is the brightness of the sub-light panel currently affected by the halo, which may change according to the actual installation and debugging; Y is the distance between the human head and the display device.

[0091] Preferably, if there are human bodies on both the left and right sides of the central axis of the effective area, the tilt adjustment method is set to be used:

[0092] If the sub-light panels around the sub-light panel affected by the halo are not affected by the halo, multiple sub-light panels around the sub-light panel affected by the halo are adjusted to tilt inwardly toward the side of the sub-light panel affected by the halo at a set angle;

[0093] If there are multiple sub-light panels affected by the halo and they form a semi-ring or annular shape, the sub-light panels affected by the halo are adjusted to tilt outwards at a set angle away from the sub-light panel at the center of the semi-ring or annular shape;

[0094] like Figure 3-Figure 5 As shown:

[0095] Taking the nine-grid partition as an example, once installed, the halo affected range is fixed. The image is analyzed based on the grayscale value of each area. Assuming that area 5 is a pure white screen, the rest of the areas are black screens, and the lamp beads in the black screen area are all off. At this time, since the divergence angle of the lamp bead beam is 120 degrees, the 12346789 area will be affected by the halo of area 5. At this time, the image module allows the motor to drive the 12346789 area to tilt outward with the circle as the reference point. Figure 3 It can be seen that the affected areas of 1379 and 2468 are the same, so the tilt angles of different areas are also different. 1379 tilts outwards by 1 degree. Assuming that the optical path and the tilt angle are 3 times, 2468 tilts outwards by 3 degrees, and the tilt direction is shown in the figure. At this time, due to the tilt of the 12346789 light board, the height of the 5th light board will be lower than the contact edge between the 12346789 light board and the 5th light board. In addition, the black film material in the middle gap of the light board allows all the light to accumulate on the light board in the 5th area, achieving the effect of eliminating the halo;

[0096] Assuming that the area of ​​the No. 5 light board is black and the area of ​​12346789 is white, then the area affected by the halo is the No. 5 area. At this time, there are two ways. One is to raise the No. 5 light board to let the black film absorb or reflect the scattered light of the No. 12346789 light board to eliminate the halo in the No. 5 area. The above is a way to eliminate it without the help of millimeter-wave radar. Tilting the light board can change the distance and range of the lamp bead beam angle.

[0097] With the help of millimeter-wave radar, when the viewing angle of the human body is detected, the image processing module tilts the light board in the opposite direction to eliminate the halo. When the radar module recognizes that there is a human body in each direction, as shown in the figure, area 5 is a white screen, and 12346789 are all tilted inward to achieve a focusing effect, because the light board itself has the function of reflecting light. The tilt angle is linked according to the viewing tilt angle of the human body; it should be noted that the focusing here requires attention. When setting the parameters, it cannot affect the overall viewing effect. If it is excessive, bright spots will appear on the screen. If there is an excessive situation, the image module can be set to lower the brightness of the lamp beads in area 5 to ensure the uniformity of the overall brightness of the image.

[0098] like Figure 7 See also Figure 8The deflection adjustment unit includes a rotating frame that limits the deflection direction of the sub-lamp board 1 to the X-axis and the Z-axis, an elastic reset member for resetting the sub-lamp board 1, a turntable 3 that pushes the sub-lamp board 1 to deflect along the X-axis and the Z-axis, and a micro motor 4 that drives the turntable; the rotating frame includes a central axis 20 fixed to the display back plate, and an end of the central axis 20 that is away from the display back plate is rotatably provided with a first rotating axis 21 that rotates along the X-axis and a first concave limiting seat 22 that is rotatably connected to the first rotating axis; a second rotating axis 23 that rotates along the Z-axis and a second concave limiting seat 24 that is rotatably connected to the second rotating axis are rotatably provided on the side of the first rotating axis 21 that is away from the central axis; the second rotating axis 23 is fixedly connected to the sub-lamp board 1; a first rotating axis pin 25 that is rotatably connected to the first rotating axis 21 is provided on the first concave limiting seat 22, A second rotating shaft pin 26 rotatably connected to the second rotating shaft 23 is arranged on the second concave limiting seat 24; the elastic reset member includes a first torsion spring 27 sleeved on the first rotating shaft pin for resetting the first rotating shaft and a second torsion spring 28 sleeved on the second rotating shaft pin for resetting the second rotating shaft; first action blocks 210 are arranged at both ends of the first rotating shaft 21, and second action blocks are arranged at both ends of the second rotating shaft 23, and the side surfaces of the two first action blocks and the two second action blocks close to the turntable 3 are coplanar; the turntable 3 is rotatably penetrated on the central shaft 20, and a gear ring 30 is arranged on the outer surface of the turntable 3, and a gear 40 meshing with the gear ring is arranged on the movable end of the micro motor 4; an extrusion inclined surface 31 for extruding the two first action blocks and the two second action blocks is arranged on the turntable 3;

[0099] During operation, the micro motor 4 drives the turntable 3 to rotate through the meshing action of the gear 40 and the ring gear 30 (preferably, the outer diameter of the gear 40 is smaller, and it cooperates with the ring gear 30 to form a reduction gear set to reduce speed and increase torque). When the extrusion slope 31 acts on the two first action blocks 210 respectively, it will correspondingly drive the sub-lamp board 1 to deflect left and right. When the extrusion slope 31 acts on the two second action blocks respectively, it will correspondingly drive the sub-lamp board 1 to deflect up and down, completing the deflection adjustment process. The overall structure is simple, reasonable and compact, and the space utilization rate is high.

[0100] A display system, used to implement the above-mentioned MIMI LED halo elimination method, such as Fig. 9 As shown, the system includes a MIMI LED light board 100, a display screen 101, a deflection adjustment unit 102, a millimeter wave radar 103, a scaler module 104 and an LED driving module 105;

[0101] The MIMI LED light panel is divided into multiple sub-light panels distributed in a matrix. There is a gap between two adjacent sub-light panels, and they are connected by an opaque soft film. The deflection adjustment unit can adjust the deflection angle of each sub-light panel.

[0102] The millimeter-wave radar is used to detect the position of the human head and output the detection results to the Scaler module;

[0103] The Scaler module divides the front area of ​​the display device into a blind area and an effective area; receives the millimeter-wave radar detection result. If the human head is located in the blind area, the LED driver module turns off the MIMI LED backlight; if the human head is located in the effective area, it enters the adaptive halo elimination mode. In the adaptive halo elimination mode, the following operations are performed:

[0104] Obtain display image information and human head position information in real time;

[0105] Determine the sub-light board currently affected by the halo according to the displayed image information;

[0106] According to the human head position information, determine whether the current human head is located on the left side or the right side of the central axis of the effective area, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment;

[0107] Determine the deflection adjustment direction of the sub-light panel to be right or left according to the left side position or right side position of the central axis of the effective area where the human head is currently located;

[0108] Calculate the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and control the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction;

[0109] The brightness of the sub-light board currently affected by the halo is calculated according to the distance between the human head and the display device, and the LED driving module is controlled according to the calculated brightness to adjust the brightness of the sub-light board accordingly.

[0110] 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 MIMI LED halo elimination method, characterized in that: The following steps are involved: The MIMI LED light panel of the display device using MIMI LED as the backlight source is divided into a plurality of sub-light panels distributed in a matrix, with a gap between two adjacent sub-light panels, and connected by an opaque soft film, and a deflection adjustment unit capable of adjusting the deflection angle of each sub-light panel is provided; According to the detection range of the millimeter-wave radar configured on the display device, the front area of ​​the display device is divided into a blind area and an effective area; The millimeter-wave radar detects the position of the human head. If the human head is in the blind spot, the LED driver module turns off the MIMI LED backlight. If the head of the person is in the effective area, the adaptive halo elimination mode is entered. The following operations are performed in the adaptive halo elimination mode: Obtain the display image information and the human head position information in real time; determine the sub-light board currently affected by the halo based on the display image information; determine whether the current human head is located on the left side or the right side of the central axis of the effective area based on the human head position information, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment; According to the current position of the human head at the left side or right side of the central axis of the effective area, the deflection adjustment direction of the sub-light board is determined to be right or left. Calculate the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and control the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction; The brightness of the sub-light board currently affected by the halo is calculated according to the distance between the human head and the display device, and the LED driving module is controlled according to the calculated brightness to adjust the brightness of the sub-light board accordingly.

2. The MIMI LED halo elimination method according to claim 1, characterized in that: The offset angle of the sub-light panel currently affected by the halo is calculated based on the offset angle of the human head from the display device: Z = eX + f; Among them, Z is the offset angle of the sub-light panel currently affected by the halo, e and f are constants, and X is the offset angle of the human head from the display device.

3. The MIMI LED halo elimination method according to claim 1, characterized in that: The brightness of the sub-light panel currently affected by the halo is calculated based on the distance between the human head and the display device: M = cY + d; Among them, M is the brightness of the sub-light panel currently affected by the halo, c and d are constants, and Y is the distance between the human head and the display device.

4. The MIMI LED halo elimination method according to claim 1, characterized in that: The blind areas include short-range detection blind areas, long-range detection blind areas, and invalid areas; The close-range detection blind area is an area whose horizontal distance from the display device is less than a first set value; The long-distance detection blind area is an area whose horizontal distance from the display device is greater than a second set value; the second set value is greater than the first set value; The invalid area is the detection blind area of ​​the millimeter-wave radar located on the left and right sides of the valid area.

5. The MIMI LED halo elimination method according to claim 1, characterized in that: If there are human bodies on both sides of the central axis of the effective area, the tilt adjustment method is set to be used: If the sub-light panels around the sub-light panel affected by the halo are not affected by the halo, multiple sub-light panels around the sub-light panel affected by the halo are adjusted to tilt inwardly toward the side of the sub-light panel affected by the halo at a set angle; If there are multiple sub-lamp panels affected by the halo and they form a semi-ring or a ring, the sub-lamp panels affected by the halo are adjusted to tilt outwards at a set angle away from the sub-lamp panel at the center of the semi-ring or the ring.

6. The MIMI LED halo elimination method according to claim 1, characterized in that: The deflection adjustment unit includes a rotating frame that limits the deflection direction of the sub-lamp board to the X-axis and the Z-axis, an elastic reset member for resetting the sub-lamp board, a turntable that pushes the sub-lamp board to deflect along the X-axis and the Z-axis, and a micro motor that drives the turntable.

7. The MIMI LED halo elimination method according to claim 6, characterized in that: The rotating frame includes a central axis fixed to the display back plate, and an end portion of the central axis away from the display back plate is rotatably provided with a first rotating axis rotating along the X-axis and a first concave limiting seat rotatably connected to the first rotating axis; a second rotating axis rotating along the Z-axis and a second concave limiting seat rotatably connected to the second rotating axis is rotatably provided on the side of the first rotating axis away from the central axis; the second rotating axis is fixedly connected to the sub-lamp panel.

8. The MIMI LED halo elimination method according to claim 7, characterized in that: The first concave limit seat is provided with a first rotating shaft pin rotatably connected to the first rotating shaft, and the second concave limit seat is provided with a second rotating shaft pin rotatably connected to the second rotating shaft; the elastic reset member includes a first torsion spring sleeved on the first rotating shaft pin for resetting the first rotating shaft and a second torsion spring sleeved on the second rotating shaft pin for resetting the second rotating shaft.

9. The MIMI LED halo elimination method according to claim 7, characterized in that: Both ends of the first rotating shaft are provided with first action blocks, and both ends of the second rotating shaft are provided with second action blocks, and the surfaces of the two first action blocks and the two second action blocks on one side close to the turntable are coplanar; the turntable is rotatably arranged on the central axis, and a gear ring is arranged on the outer surface of the turntable, and a gear meshing with the gear ring is arranged at the movable end of the micro motor; an extrusion slope for extruding the two first action blocks and the two second action blocks is arranged on the turntable.

10. A display screen system, used to implement the MIMI LED halo elimination method according to any one of claims 1 to 9, characterized in that: The system includes a MIMI LED light board, a display screen, a deflection adjustment unit, a millimeter wave radar, a scaler module and an LED driver module; The MIMI LED light panel is divided into a plurality of sub-light panels distributed in a matrix, with a gap between two adjacent sub-light panels, and connected by an opaque soft film, and the deflection adjustment unit can adjust the deflection angle of each sub-light panel; The millimeter wave radar is used to detect the position of the human head and output the detection result to the Scaler module; The Scaler module divides the front area of ​​the display device into a blind area and an effective area; receives the millimeter wave radar detection result, and if the position of the human head is located in the blind area, the LED driver module turns off the MIMI LED backlight; if the position of the human head is located in the effective area, enters the adaptive halo elimination mode, and performs the following operations in the adaptive halo elimination mode: Obtain display image information and human head position information in real time; Determine the sub-light board currently affected by the halo according to the displayed image information; According to the human head position information, determine whether the current human head is located on the left side or the right side of the central axis of the effective area, and obtain the distance and offset angle between the human head and the display device; if there are human bodies on both the left and right sides of the central axis of the effective area, adjust according to the set tilt adjustment method and end this adjustment; Determine the deflection adjustment direction of the sub-light panel to be right or left according to the left side position or right side position of the central axis of the effective area where the human head is currently located; Calculate the offset angle of the sub-light board currently affected by the halo according to the offset angle between the human head and the display device, and control the deflection adjustment unit to adjust the sub-light board accordingly according to the calculated offset angle and the deflection adjustment direction; The brightness of the sub-light board currently affected by the halo is calculated according to the distance between the human head and the display device, and the LED driving module is controlled according to the calculated brightness to adjust the brightness of the sub-light board accordingly.

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