LED display device capable of reducing dynamic blurring of vision

Abstract

The invention relates to the technical field of display equipment, and provides LED display equipment capable of reducing visual dynamic blurring, the LED display equipment comprises a display panel, a backlight substrate and a plurality of LED light sources, and each LED light source comprises a light-emitting chip coupled to the backlight substrate; a light conversion layer disposed on the light-emitting chip and covering a light-emitting front surface of the light-emitting chip; a diffusion layer disposed on the light conversion layer; the first lens layer is connected to the backlight substrate and covers the diffusion layer, a plurality of optical Fresnel structures which are concentrically arranged are arranged on the emergent surface of the first lens layer, and each optical Fresnel structure is provided with a first surface facing the circle center and a second surface back to the circle center; the first face is configured to be parallel to light refracted on the incident face of the Fresnel lens, and the second face is configured to be in a hemispherical profile. The LED light source is provided with the first lens layer, and the first lens layer is provided with the optical Fresnel structure, so that the texture sense of a picture on the display panel is stronger, the picture quality is improved, and the effect of reducing dynamic blurring of vision is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and more specifically, to an LED display device that reduces visual motion blur. Background Art

[0002] LED (light-emitting diode) display devices include thousands of LED chips, which are arranged in a predetermined matrix to form pixels. Each pixel may contain red, green, and blue LED chips to generate full-color images. Each LED pixel is connected to a control circuit that receives signals from the control system and adjusts the brightness of each LED chip accordingly. By precisely controlling the brightness of each LED chip and the ratio of red, green, and blue, a wide range of color displays can be achieved, and it is widely used in the field of television.

[0003] In daily life, when people watch TV, they inevitably move around and change their positions. When people observe the TV screen after walking, the picture will be blurred, and visual motion blur will occur.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0005] The purpose of the present application is to provide an LED display device that reduces visual motion blur, so as to solve the technical problem in the prior art that display devices easily cause visual motion blur.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an LED display device for reducing visual dynamic blur, comprising a display panel, a backlight substrate, and a plurality of LED light sources arrayed on the backlight substrate, wherein the backlight substrate is arranged on the rear end surface of the display panel, and the LED light source comprises:

[0007] A light emitting chip, coupled to the backlight substrate;

[0008] A light conversion layer, disposed on the light emitting chip and covering the light emitting front side of the light emitting chip, the light conversion layer being used to convert and mix the light emitted by the light emitting chip to emit white light;

[0009] A diffusion layer, disposed on the light conversion layer, for expanding the light emission angle of the white light;

[0010] A first lens layer is connected to the backlight substrate and is covered on the diffusion layer. The first lens layer has a plurality of concentrically arranged optical Fresnel structures on its exit surface. Each optical Fresnel structure has a first surface facing the center of a circle and a second surface facing away from the center of a circle. The first surface is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the second surface is configured to be a hemispherical profile.

[0011] Furthermore, the LED light source also includes a second lens layer, which is connected to the first lens layer and covers the exit surface of the first lens layer. The exit surface of the second lens layer has a plurality of concentrically arranged optical Fresnel structures, each optical Fresnel structure has a third surface facing the center of the circle and a fourth surface facing away from the center of the circle, the third surface is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the fourth surface is configured as a concave arc surface.

[0012] Further, there is a first distance between the first lens layer and the diffusion layer, there is a second distance between the second lens layer and the first lens layer, and the sum of the first distance and the second distance is no more than 5 mm.

[0013] In some embodiments, the light emitting chip is a mini LED, and the light emitting chip is configured so that a cross section of a light beam generated thereby is circular.

[0014] Furthermore, the light emitting chip is a blue light chip, the light conversion layer includes a green light conversion layer and a red light conversion layer, and the green light conversion layer and the red light conversion layer are sequentially arranged on the light emitting chip and cover the light emitting front side of the light emitting chip.

[0015] In some embodiments, the diffusion layer includes a scattering layer and a reflective layer, the scattering layer is connected to the light emitting surface of the light conversion layer, the reflective layer is connected to the light emitting surface of the scattering layer, and diffusion particles are provided in both the scattering layer and the reflective layer, and the proportion of diffusion powder in the reflective layer is greater than the proportion of diffusion particles in the scattering layer.

[0016] Furthermore, the LED display device for reducing visual motion blur also includes:

[0017] A sensor unit, connected to the front end of the display panel, for detecting the position information of a target person;

[0018] A substrate adjustment mechanism, connected to a side of the backlight substrate away from the display panel, and used for horizontally rotating the backlight substrate;

[0019] A control unit is electrically connected to the sensing unit and the substrate adjustment mechanism. The control unit is used to control the activation of the substrate adjustment mechanism according to the position information. After activation, the substrate adjustment mechanism rotates horizontally so that the center of the backlight substrate faces the target person.

[0020] In some embodiments, the sensing unit comprises:

[0021] The lens is used to collect the image information in front of the display panel;

[0022] A sensor is electrically connected to the lens and the control unit, and is used to identify a target person from the picture information and determine a direction vector of the target person in the picture information.

[0023] In some embodiments, the substrate adjustment structure includes:

[0024] A driving mechanism, electrically connected to the control unit, the control unit being used to control the start of the driving mechanism according to the direction vector;

[0025] The movable bracket is connected between the backlight substrate and the driving mechanism. The driving mechanism drives the movable bracket to move after being started, and the movable bracket drives the backlight substrate to rotate horizontally after moving.

[0026] In some embodiments, the rotation angle of the substrate adjustment mechanism during horizontal rotation is no greater than 10°.

[0027] The beneficial effects of the LED display device for reducing visual dynamic blur provided by the present application are at least:

[0028] The LED light source is provided with a first lens layer, and an optical Fresnel structure is provided on the first lens layer. The first surface and the second surface of the optical Fresnel structure have a collimating effect, which can make the divergent light in the light beam emitted by the light-emitting chip tend to be parallel, that is, reduce the proportion of intersecting light in the light beam. When the light beam is irradiated to the surface of the display panel, it can better reflect the subtle height difference on the surface of the display panel and form more corresponding shadows, thereby making the texture of the picture on the display panel stronger and improving the picture quality. When a person and the display panel are relatively displaced, due to the stronger texture of the picture, the human eye can observe more details of the picture, and the picture seen will be clearer, thereby achieving the effect of reducing visual motion blur.

[0029] Through the cooperation of the first lens layer and the second lens layer, the light beam emitted by the light-emitting chip can be collimated twice and diffused once, so that the light rays in the light beam finally irradiated on the display panel tend to be more parallel and have a larger light output angle, which improves the picture quality while reducing costs and increasing efficiency. While saving costs, it can also reduce the risk of visual motion blur when users observe the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic diagram of the structure of an LED display device for reducing visual dynamic blur provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 Magnified view of area A.

[0033] Among them, the reference numerals in the figure are:

[0034] 1. Display panel;

[0035] 2. Backlight substrate;

[0036] 3. Light-emitting chip;

[0037] 4. light conversion layer; 41. green light conversion layer; 42. red light conversion layer;

[0038] 5. Diffusion layer; 51. Scattering layer; 52. Reflection layer;

[0039] 6. first lens layer; 61. first surface; 62. second surface;

[0040] 7, second lens layer; 71, third surface; 72, fourth surface. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] The following describes an LED display device for reducing visual motion blur according to an embodiment of the present application in conjunction with the accompanying drawings.

[0044] See also Figure 1 , Figure 1 A schematic structural diagram of an LED display device for reducing visual motion blur of the present application is shown, comprising a display panel 1, a backlight substrate 2, and a plurality of LED light sources arrayed on the backlight substrate 2, wherein the backlight substrate 2 is disposed on the rear end face of the display panel 1, and the LED light source is used to illuminate various areas on the back side of the display panel 1, and the LED light source comprises a light-emitting chip 3, a light conversion layer 4, a diffusion layer 5, and a first lens layer 6.

[0045] Specifically, the light emitting chip 3 is coupled to the backlight substrate 2, and the light emitting chip 3 is located on the side of the backlight substrate 2 facing the display panel 1. The light conversion layer 4 is arranged on the light emitting chip 3 and covers the light emitting front of the light emitting chip 3. The light conversion layer 4 is used to convert and mix the light emitted by the light emitting chip 3 to emit white light. The diffusion layer 5 is arranged on the light conversion layer 4 to expand the light emission angle of the white light.

[0046] The first lens layer 6 is connected to the backlight substrate 2 and is covered on the diffusion layer 5. The first lens layer 6 has a plurality of concentrically arranged optical Fresnel structures on its exit surface. Each optical Fresnel structure has a first surface 61 facing the center of the circle and a second surface 62 facing away from the center of the circle. The first surface 61 is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the second surface 62 is configured to be a hemispherical profile.

[0047] It can be understood that the visual motion blur mainly manifests itself in the inability to accurately see the picture on the display panel 1. If the picture quality of the picture on the display panel 1 is improved, the visual motion blur can be reduced.

[0048] It should be noted that conventional LED light sources usually have a hemispherical lens layer on the outermost layer to expand the light-emitting angle, but the light rays in most of the light beams refracted by the hemispherical lens layer will intersect, that is, most of the light rays in the light beams irradiated on the display panel 1 are intersecting light rays. When the light beams are irradiated on the display panel 1, the intersecting light rays will weaken the texture effect on the surface of the display panel 1. In other words, when the intersecting light rays irradiate the texture on the surface of the display panel 1, they cannot show subtle height differences, which weakens the corresponding shadows, reduces the texture of the picture on the display panel 1, and also reduces the picture quality. When people observe the display panel 1, it is easier to produce visual motion blur.

[0049] In the embodiments of this application, refer to Figure 1 , the LED light source is provided with a first lens layer 6, and an optical Fresnel structure is provided on the first lens layer 6. The first surface 61 and the second surface 62 of the optical Fresnel structure play a collimating effect, which can make the divergent light in the light beam emitted by the light-emitting chip 3 tend to be parallel, that is, reduce the proportion of intersecting light in the light beam. Since the light beam generated by the light-emitting chip 3 tends to be parallel after passing through the first lens layer 6, when the light beam is irradiated to the surface of the display panel 1, it can better reflect the subtle height difference on the surface of the display panel 1, and more corresponding shadows are formed, thereby making the texture of the picture on the display panel 1 stronger and improving the picture quality. When a person and the display panel 1 are relatively displaced, due to the stronger texture of the picture, the human eye can observe more details of the picture, and the picture seen will be clearer, thereby achieving the effect of reducing visual dynamic blur.

[0050] Continue reading Figure 1 The first lens layer 6 is configured as a plane mirror, which enables the spacing between the first lens layer 6 and the light-emitting chip 3 to be configured smaller, that is, the thickness of the formed LED light source is smaller, and the corresponding display device is thinner, which greatly improves the aesthetics of the display device.

[0051] At the same time, in addition to the collimating effect of the first lens layer 6, by setting the diffusion layer 5 on the light conversion layer 4, the light output angle of the light beam can be expanded, replacing the function of the hemispherical lens layer used in the traditional technology, thereby expanding the size of the light spot formed by the LED light source on the display panel 1, improving the picture quality on the display panel 1, and reducing the number of LED light sources set, thereby achieving the effect of reducing costs and increasing efficiency.

[0052] Further, see Figure 1 The diffusion layer 5 is also set as a planar layer to reduce the thickness of the LED light source.

[0053] In some embodiments, see Figure 1 and Figure 2The LED light source also includes a second lens layer 7, which is connected to the first lens layer 6 and covers the exit surface of the first lens layer 6. The exit surface of the second lens layer 7 has a plurality of concentrically arranged optical Fresnel structures, each of which has a third surface 71 facing the center of the circle and a fourth surface 72 facing away from the center of the circle. The third surface 71 is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the fourth surface 72 is configured to be a concave arc surface.

[0054] After passing through the first lens layer 6, the light beam enters the second lens layer 7. Since the first lens layer 6 has collimated the light beam once, the light beam incident on the second lens layer 7 has tended to be parallel. After the light beam enters the second lens layer 7, the third surface 71 of the second lens layer 7 can collimate the light beam again, and at the same time, the fourth surface 72 of the second lens layer 7 can diffuse the parallel light beam, so that the diffusion angle of the parallel light beam in the light beam is larger. In other words, the light beam can obtain a larger light-emitting angle after passing through the second lens layer 7, and the light beam in the light beam tends to be more parallel.

[0055] Through the cooperation of the first lens layer 6 and the second lens layer 7, the light beam emitted by the light-emitting chip 3 can be collimated twice and diffused once, so that the light rays in the light beam finally irradiated on the display panel 1 are more parallel and have a larger light output angle, which improves the picture quality while reducing costs and increasing efficiency. While saving costs, it can also reduce the risk of visual dynamic blur when users observe the display panel 1.

[0056] Further, see Figure 2 The first lens layer 6 and the second lens layer 7 are both planar structures as a whole, so the spacing between the layer structures can be set very small.

[0057] Specifically, there is a first distance between the first lens layer 6 and the diffusion layer 5 , and there is a second distance between the second lens layer 7 and the first lens layer 6 , and the sum of the first distance and the second distance is no greater than 5 mm.

[0058] Exemplarily, the first spacing can be set to 2mm and the second spacing can be set to 2mm. In this way, the total spacing on the LED light source is only 4mm, which is much lower than the 6-7mm gap size of the traditional LED light source. This allows the LED light source to be set very thin, and the display device can also be set to be lighter, thinner and more beautiful.

[0059] Of course, the first spacing may be set to 1 mm and the second spacing may be set to 1 mm, so that the LED light source can be set thinner and the display device can be thinner and more beautiful.

[0060] In some embodiments, in order to make the LED light source smaller, lighter and thinner, the light emitting chip 3 is a mini LED, that is, a micro light emitting diode.

[0061] At the same time, the light emitting chip 3 is configured so that the cross section of the light beam generated by it is circular, so that the light beam can better cooperate with the optical Fresnel structure on the first lens layer 6 and the second lens layer 7, improve the collimation effect, and the proportion of parallel light in the outgoing light beam is higher.

[0062] In some embodiments, the light emitting chip 3 is a blue light chip, and the light conversion layer 4 includes a green light conversion layer 41 and a red light conversion layer 42, which are sequentially arranged on the light emitting chip 3 and cover the light emitting front side of the light emitting chip 3.

[0063] The green light conversion layer 41 faces the light-emitting front of the light-emitting chip 3, the red light conversion layer 42 covers the green light conversion layer 41, and the green light conversion layer 41 is located between the light-emitting chip 3 and the red light conversion layer 42. Of course, the positions of the red light conversion layer 42 and the green light conversion layer 41 can also be swapped, the red light conversion layer 42 faces the light-emitting front of the light-emitting chip 3, the green light conversion layer 41 covers the red light conversion layer 42, and the red light conversion layer 42 is located between the light-emitting chip 3 and the green light conversion layer 41.

[0064] Exemplarily, when the green light conversion layer 41 is located between the light emitting chip 3 and the red light conversion layer 42, after the blue light chip emits blue light, the blue light excites green light when passing through the green light conversion layer 41, and excites red light when passing through the red light conversion layer 42, which are then mixed to form white light.

[0065] In some embodiments, red light phosphor is disposed in the red light conversion layer 42 and green light phosphor is disposed in the green light conversion layer 41 . The red light phosphor and the green light phosphor include but are not limited to fluoride phosphors, such as KSF phosphor and KGF phosphor.

[0066] Furthermore, the diffusion layer 5 includes a scattering layer 51 and a reflecting layer 52, the scattering layer 51 is connected to the light emitting surface of the light conversion layer 4, and the reflecting layer 52 is connected to the light emitting surface of the scattering layer 51, and diffusion particles are provided in both the scattering layer 51 and the reflecting layer 52, and the proportion of diffusion powder in the reflecting layer 52 is greater than the proportion of diffusion particles in the scattering layer 51.

[0067] The scattering layer 51 is a silica gel layer with diffusion powder inside, and covers the light conversion layer 4. After entering the scattering layer 51, the light is converted by the diffusion particles so that more light is emitted from the side of the light emitting chip 3, thereby increasing the light output angle of the light emitting chip 3.

[0068] The reflective layer 52 is a transparent silicone layer with diffusion particles disposed therein, and the reflective layer 52 covers the scattering layer 51 .

[0069] The diffusion particles are mainly used to scatter light. When the concentration of the diffusion particles is very high, they can also reflect light, which is also the working principle of the scattering layer 51 and the reflective layer 52. After the reflective layer 52 is set, part of the light entering the reflective layer 52 will return to the scattering layer 51, and this part of the light will be scattered again and emitted more from the side of the packaged chip, thereby further increasing the light output angle of the light emitting chip 3.

[0070] By providing the scattering layer 51 and the reflective layer 52, the light output angle of the light emitting chip 3 is improved. Based on this, the light area formed by the light beam after passing through the first lens layer 6 and the second lens layer 7 will also be larger, thereby improving the light output quality of the LED backlight source.

[0071] In some embodiments, the diffusion particles include any one of silicon dioxide solid particles and titanium dioxide solid particles, or a combination thereof.

[0072] Furthermore, in addition to improving the texture of the image on the display panel 1, visual motion blur can also be reduced by adjusting the angle between the backlight substrate 2 and the character. It can be understood that the closer the backlight substrate 2 is to the human eye, the clearer the image seen by the human eye will be, thereby reducing visual motion blur.

[0073] To this end, in some embodiments, the LED display device for reducing visual dynamic blur also includes a sensing unit, a substrate adjustment mechanism, and a control unit. The sensing unit is connected to the front end surface of the display panel 1, and is used to detect the position information of the target person. The substrate adjustment mechanism is connected to the side of the backlight substrate 2 away from the display panel 1, and is used to horizontally rotate the backlight substrate 2. The control unit is electrically connected to the sensing unit and the substrate adjustment mechanism, and the control unit is used to control the start of the substrate adjustment mechanism according to the position information. After starting, the substrate adjustment mechanism rotates horizontally so that the center of the backlight substrate 2 faces the target person.

[0074] In this embodiment, the target person moves from a position facing the display panel 1 to the side of the display panel 1. When the target person is directly in front of the display panel 1, the backlight substrate 2 is in the initial position, the sensing unit detects that the target person is located at the center of the backlight substrate 2, and the control unit does not control the substrate adjustment mechanism to start. When the target person starts to move, the target person will be located to the side of the backlight substrate 2. At this time, the sensing unit detects the position change and current position of the target person, the control unit controls the substrate adjustment mechanism to start, and adjusts the rotation direction of the backlight substrate 2 according to the current position of the target person, so that the center of the backlight substrate 2 faces the target person.

[0075] It can be understood that when the backlight substrate 2 is facing the target person, the LED light source on the backlight substrate 2 will also face the target person, and the light intensity directly in front of the LED light source is the largest, so that the human eye can receive more light, and can see the picture on the display panel 1 more clearly, thereby achieving the effect of reducing visual motion blur.

[0076] In some embodiments, the sensing unit includes a lens and a sensor. The lens is used to collect the image information directly in front of the display panel 1. The sensor is electrically connected to the lens and the control unit, and the sensor is used to identify the target person from the image information and determine the direction vector of the target person in the image information.

[0077] During use, the sensor collects data, stores the target person's facial data or an object model of his or her body shape, presets the horizontal center point of the sensor as a fixed origin, and reserves an area margin for anti-shake in the horizontal direction. When the tracking target moves beyond the area margin within the field of view of the lens, the sensor collects data and compares the image with the pre-stored data to determine the target person's horizontal moving direction vector corresponding to the fixed origin in the horizontal plane, and generates a direction vector signal. The sensor transmits the direction vector signal to the control unit, and the control unit controls the substrate adjustment mechanism to start, driving the backlight substrate 2 to rotate a certain angle in the horizontal plane, so that the backlight substrate 2 rotates toward the target person.

[0078] The sensor is provided with a processor, and the processor executes the control method in the above-mentioned embodiment when running, and the sensor includes a dot matrix area sensor.

[0079] In some embodiments, the substrate adjustment structure includes a driving mechanism and a movable bracket. The driving mechanism is electrically connected to a control unit, and the control unit is used to control the driving mechanism to start according to a direction vector. The movable bracket is connected between the backlight substrate 2 and the driving mechanism. The driving mechanism drives the movable bracket to move after starting, and the movable bracket drives the backlight substrate 2 to rotate horizontally after moving.

[0080] In some embodiments, the driving mechanism includes a servo motor, the movable bracket includes a pan-tilt head capable of horizontal rotation, the servo motor has a rotating shaft, the rotating shaft is connected to one end of the pan-tilt head, and the other end of the pan-tilt head is connected to the center of a side of the backlight substrate 2 away from the display panel 1.

[0081] In some embodiments, the rotation angle of the substrate adjustment mechanism during horizontal rotation is no greater than 10°.

[0082] It can be understood that there is a certain gap between the display panel 1 and the backlight substrate 2, but the gap cannot be too large, otherwise it will affect the brightness of the upper light area of ​​the display panel 1, and the display device will appear thick and heavy. The backlight substrate 2 needs to rotate within this gap. Therefore, the substrate adjustment mechanism rotates within a certain range, which can reduce visual motion blur and make the display device thinner.

[0083] In some embodiments, the rotation angle of the substrate adjustment mechanism during horizontal rotation includes any one of 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10° or any value between two adjacent angles.

[0084] At the same time, since the first lens layer 6 and the second lens layer 7 are both planar structures as a whole, the thickness of the LED light source is also very small, which is equivalent to indirectly increasing the gap between the display panel 1 and the backlight substrate 2, providing a larger margin for the rotation of the backlight substrate 2. When the thickness of the display device is the same, the backlight substrate 2 can be rotated to a larger angle, and the backlight substrate 2 can be more accurately directed to the target person, thereby better reducing the effect of visual motion blur.

[0085] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An LED display device for reducing visual motion blur, characterized in that: It includes a display panel, a backlight substrate, and a plurality of LED light sources arrayed on the backlight substrate, wherein the backlight substrate is arranged on the rear end surface of the display panel, and the LED light source includes: A light emitting chip, coupled to the backlight substrate; A light conversion layer, disposed on the light emitting chip and covering the light emitting front side of the light emitting chip, the light conversion layer being used to convert and mix the light emitted by the light emitting chip to emit white light; A diffusion layer, disposed on the light conversion layer, for expanding the light emission angle of the white light; A first lens layer is connected to the backlight substrate and is covered on the diffusion layer. The first lens layer has a plurality of concentrically arranged optical Fresnel structures on its exit surface. Each optical Fresnel structure has a first surface facing the center of a circle and a second surface facing away from the center of a circle. The first surface is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the second surface is configured to be a hemispherical profile.

2. The LED display device for reducing visual motion blur according to claim 1, characterized in that: The LED light source also includes a second lens layer connected to the first lens layer and covering the exit surface of the first lens layer. The exit surface of the second lens layer has a plurality of concentrically arranged optical Fresnel structures, each optical Fresnel structure has a third surface facing the center of the circle and a fourth surface facing away from the center of the circle, the third surface is configured to be parallel to the light refracted on the incident surface of the Fresnel lens, and the fourth surface is configured as a concave arc surface.

3. The LED display device for reducing visual motion blur according to claim 2, characterized in that: There is a first distance between the first lens layer and the diffusion layer, there is a second distance between the second lens layer and the first lens layer, and the sum of the first distance and the second distance is no more than 5 mm.

4. The LED display device for reducing visual motion blur according to claim 2, characterized in that: The light emitting chip is a mini LED, and the light emitting chip is configured so that the cross section of the light beam generated by the light emitting chip is circular.

5. The LED display device for reducing visual motion blur according to claim 2, characterized in that: The light emitting chip is a blue light chip, and the light conversion layer includes a green light conversion layer and a red light conversion layer, which are sequentially arranged on the light emitting chip and cover the light emitting front side of the light emitting chip.

6. The LED display device for reducing visual motion blur according to claim 2, characterized in that: The diffusion layer includes a scattering layer and a reflective layer, the scattering layer is connected to the light emitting surface of the light conversion layer, the reflective layer is connected to the light emitting surface of the scattering layer, and diffusion particles are arranged in both the scattering layer and the reflective layer, and the proportion of diffusion powder in the reflective layer is greater than the proportion of diffusion particles in the scattering layer.

7. The LED display device for reducing visual motion blur according to claim 2, characterized in that: Also includes: A sensor unit, connected to the front end of the display panel, for detecting the position information of a target person; A substrate adjustment mechanism, connected to a side of the backlight substrate away from the display panel, and used for horizontally rotating the backlight substrate; A control unit is electrically connected to the sensing unit and the substrate adjustment mechanism. The control unit is used to control the activation of the substrate adjustment mechanism according to the position information. After activation, the substrate adjustment mechanism rotates horizontally so that the center of the backlight substrate faces the target person.

8. The LED display device for reducing visual motion blur according to claim 7, characterized in that: The sensing unit comprises: The lens is used to collect the image information in front of the display panel; A sensor is electrically connected to the lens and the control unit, and is used to identify a target person from the picture information and determine a direction vector of the target person in the picture information.

9. The LED display device for reducing visual motion blur according to claim 8, characterized in that: The substrate adjustment structure comprises: A driving mechanism, electrically connected to the control unit, the control unit being used to control the start of the driving mechanism according to the direction vector; The movable bracket is connected between the backlight substrate and the driving mechanism. The driving mechanism drives the movable bracket to move after being started, and the movable bracket drives the backlight substrate to rotate horizontally after moving.

10. The LED display device for reducing visual motion blur according to claim 9, characterized in that: The rotation angle of the substrate adjustment mechanism during horizontal rotation is no greater than 10°.

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