LED display device and display control method

Abstract

The invention provides an LED display device. The LED display device comprises a plurality of display units; the display unit comprises an LED light source, a semitransparent mirror arranged above the LED light source and a reflection lens set used for reflecting the LED light source. The translucent mirror is used for transmitting and reflecting light rays emitted by the LED light source, and the reflecting lens group is used for receiving the LED light rays reflected by the translucent mirror, so that the reflected light rays and the transmitted light rays are positioned in the same visible range. According to the invention, the semi-transparent mirror and the reflecting lens group are arranged, so that the light emitted by one LED light source can be at least divided into two paths of light rays in the same visible range; forming pixel points on at least two visual effects; under the condition of considering energy consumption and heating, the resolution ratio of the LED display equipment is improved.

Description

Technical Field

[0001] The present invention relates to the field of display panels, and in particular to an LED display device and a display control method. Background Art

[0002] With the continuous advancement of science and technology, visual display technology is also developing rapidly. LED display devices came into being. With the advancement of LED packaging technology, the resolution of LED display devices has gradually increased. Improving resolution has become one of the core development trends of current LEDs. The core of high resolution lies in the number of LED light sources per unit area, that is, the more LED light sources per unit area, the higher the resolution in theory; however, since LED light sources are energy-consuming and heat-generating components, the more light sources per unit area, the greater the energy consumption, the smaller the heat dissipation area, and the greater the heat generation. This will accelerate the aging of the equipment, while increasing the failure rate of the equipment and the difficulty of equipment production.

[0003] How to improve the resolution of LED display devices while taking into account energy consumption and heat generation is a technical problem that needs to be urgently solved in the current industry. Summary of the invention

[0004] The present invention arranges a semi-transparent mirror and a reflective lens group so that the light emitted by an LED light source can be divided into at least two light rays in the same visible range; at least two pixel points in visual effects are formed; and the resolution of the LED display device is improved while taking into account energy consumption and heat generation.

[0005] According to one aspect of the present invention, the present invention provides an LED display device, comprising:

[0006] A plurality of display units; the display units include an LED light source, a semi-transparent mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source;

[0007] The semi-mirror transmits and reflects the light emitted by the LED light source, and the reflective lens group is used to receive the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are in the same visible range.

[0008] Optionally, the semi-mirror is a physical semi-mirror, which transmits part of the light emitted by the LED light source and reflects part of the light emitted by the LED light source.

[0009] Optionally, the semi-mirror is an electrically controlled semi-mirror, which transmits the light emitted by the LED light source at a first moment and reflects the light emitted by the LED light source at a second moment.

[0010] Furthermore, the reflective lens group includes at least one reflective unit, which includes a first reflective mirror surface for receiving light reflected by the semi-transparent mirror, a second reflective mirror surface for receiving light reflected by the first reflective mirror surface, and a third reflective mirror surface for receiving light reflected by the second reflective mirror surface, and the output light of the third reflective mirror surface is in the same visible range as the transmitted light of the semi-transparent mirror.

[0011] Furthermore, the multiple display units are installed on a first circuit board with a gap, and the semi-mirror and the first reflective mirror are arranged on the side of the first circuit board facing the LED light source; the second reflective mirror and the third reflective mirror are arranged on the side of the first circuit board away from the LED light source; the outgoing light of the first reflective mirror passes through the gap and is received by the second reflective mirror, and the outgoing light of the third reflective mirror passes through the gap and is in the same visible range as the transmitted light of the semi-mirror.

[0012] Optionally, the multiple display units are mounted on a second circuit board, and the semi-mirror, the first reflective mirror, the second reflective mirror and the third reflective mirror are all arranged on a side of the second circuit board facing the LED light source.

[0013] Furthermore, the reflected light reflected by the reflective lens group is parallel to the transmitted light of the semi-transparent mirror.

[0014] Furthermore, the polarization directions of the reflected light and the transmitted light are perpendicular to each other.

[0015] According to a second aspect of the present invention, the present invention provides a display control method for an LED display device, the display device comprising: a plurality of display units; the display unit comprising an LED light source, a semi-mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source; the semi-mirror transmits and reflects the light emitted by the LED light source, and the reflective lens group is used to receive the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are in the same visual range;

[0016] Controlling the semi-mirror to transmit the light emitted by the LED light source at a first moment, and controlling the plurality of display units to jointly display a first picture;

[0017] Controlling the semi-mirror to reflect the light emitted by the LED light source at a second moment, and controlling the plurality of display units to jointly display a second picture;

[0018] The first picture and the second picture have the same visual effect.

[0019] According to a third aspect of the present invention, the present invention provides a display control method for an LED display device, the display device comprising: a plurality of display units; the display unit comprising an LED light source, a semi-mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source; the semi-mirror transmits and reflects the light emitted by the LED light source, the reflective lens group is used to receive the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are in the same visible range, and the polarization directions of the reflected light and the transmitted light are perpendicular to each other;

[0020] Controlling the semi-mirror to transmit the light emitted by the LED light source at the first moment, and controlling the plurality of display units to jointly display a third picture;

[0021] Controlling the semi-mirror to reflect the light emitted by the LED light source at the second moment, and controlling the plurality of display units to jointly display a fourth picture;

[0022] The third frame and the fourth frame respectively display a left-eye frame and a right-eye frame of a 3D image.

[0023] To sum up, compared with the prior art, the present invention arranges a semi-transparent mirror and a reflective lens group so that the light emitted by an LED light source can be divided into at least two light rays within the same visible range, forming at least two pixel points in visual effects; that is, although there is only one LED light source in each display unit, two pixel points in visual effects can be formed. Through this arrangement, the resolution of the display device can be improved without increasing the number of LED light sources per unit area, and the resolution of the LED display device can be improved without increasing energy consumption and heat generation. Compared with the prior art, it has outstanding substantial characteristics and significant progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the LED display device in an embodiment of the present invention;

[0026] Figure 2 is a light path diagram of a single display unit when the half mirror is a physical half mirror in an embodiment of the present invention;

[0027] Figure 3 is a light path diagram of a single display unit at the first moment when the half mirror is an electrically controlled half mirror in an embodiment of the present invention;

[0028] Figure 4is a light path diagram of a single display unit at the second moment when the half mirror is an electrically controlled half mirror in an embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the overall structure in which a plurality of display units are installed on a first circuit board in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of a structure in which a single display unit is fixed to a bracket in an embodiment of the present invention;

[0031] Figure 7 It is a schematic diagram of the overall structure in which a plurality of display units are installed on a second circuit board in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the principle of forming three pixel points by using one LED and two same-direction semi-transparent mirrors in an embodiment of the present invention;

[0033] Fig. 9 This is a schematic diagram of the principle of forming three pixel points by using one LED and two mirrored semi-mirrors in an embodiment of the present invention.

[0034] Figure name:

[0035] 1-display unit; 11-LED light source; 12-semi-mirror; 13-reflection lens group; 131-first reflective mirror surface; 132-second reflective mirror surface; 133-third reflective mirror surface; 2-first circuit board; 3-second circuit board. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of the present invention.

[0042] In the following description, suffixes such as "module", "component", "assembly" or "unit" are used only to facilitate the description of the present invention and have no specific meanings. Therefore, they can be used in combination.

[0043] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0044] According to one embodiment of the present invention, Figure 1 As shown, this embodiment provides an LED display device, including:

[0045] A plurality of display units 1; the display unit 1 comprises an LED light source 11, a semi-transparent mirror 12 disposed above the LED light source 11, and a reflective lens group 13 for reflecting the LED light source 11;

[0046] The semi-transparent mirror 12 transmits and reflects the light emitted by the LED light source 11 , and the reflective lens group 13 is used to receive the LED light reflected by the semi-transparent mirror 12 , so that the reflected light and the transmitted light are in the same visible range.

[0047] In the present embodiment, the display device is composed of a plurality of display units 1. The required display screen is formed by controlling the plurality of display units 1 to emit different lights. Each display unit 1 includes an LED light source 11, which is an RGB light source. In some other scenarios, an LED light source 11 can also be called a pixel. Each display unit 1 also includes a semi-transparent mirror 12 and a reflective lens group 13. The semi-transparent mirror 12 splits the light emitted by the LED into transmitted light and reflected light. The transmitted light is the light that directly passes through the semi-transparent mirror 12. After the reflected light is received by the reflective lens group 13 and reflected by a plurality of reflective mirrors in the reflective lens group 13, the emitted light from the last reflective mirror is in the same visible range as the transmitted light. That is, within the visible range, both the transmitted light and the reflected light can be seen, that is, both the original image of the LED light source 11 and the virtual image after reflection can be seen within the visible range.

[0048] Further preferably, in this embodiment, the reflected light reflected by the reflective lens group 13 is parallel to the transmitted light of the semi-transparent mirror 12. When the reflected light is parallel to the transmitted light, the display effect is best.

[0049] By setting the semi-transparent mirror 12 and the reflective lens group 13, the light emitted by an LED light source 11 can be divided into at least two light rays within the same visible range; forming at least two pixel points in visual effects; that is, although there is only one LED light source 11 in each display unit 1, two pixel points in visual effects can be formed. Through this setting method, the resolution of the display device can be improved without increasing the number of LED light sources 11 per unit area, and the resolution of the LED display device can be improved without increasing energy consumption and heat generation. Compared with the prior art, it has outstanding substantial characteristics and significant progress.

[0050] In this embodiment, multiple display units 1 are installed on a PCB substrate, and the PCB substrate can be a flexible printed circuit board or a rigid printed circuit board; the semi-mirror 12 can be a semi-transparent and semi-reflective coated mirror, that is, a physical semi-mirror, or an electrically controlled semi-mirror that adjusts transmittance and reflectivity based on an electrical signal, and the reflective lens group 13 includes multiple reflective mirror surfaces, each of which is formed with a coating; wherein the semi-mirror 12, the reflective lens group 13 and the LED light source 11 can be packaged into an integral component, and by packaging the above-mentioned components into an integral component, the docking error between the components can be effectively reduced, the accuracy of the optical path can be ensured, and thus the consistency of the display effect of the display device can be improved; in addition, the semi-mirror 12 is located directly above the LED light source 11, and its purpose is to completely cover the LED light source, thereby receiving all the LED light sources, and preventing the loss of the LED light source from causing a reduction in resolution and brightness.

[0051] According to one embodiment of the present invention, Figure 2 As shown, the semi-mirror 12 is a physical semi-mirror, which transmits part of the light emitted by the LED light source 11 and reflects part of the light emitted by the LED light source 11. A physical semi-mirror refers to a lens in which the semi-mirror 12 itself has both transmission optical properties and reflection optical properties. This type of lens is usually coated with a semi-transparent and semi-reflective film, so that the lens can reflect light while transmitting light. The physical semi-mirror described in this embodiment is preferably capable of transmitting and reflecting equal amounts of light to ensure that the visual effects of two pixel points on the same display unit 1 are the same. In an ideal state, the physical semi-mirror has a transmittance of 50% and a reflectance of 50%. Of course, based on certain other requirements, the transmitted light and the reflected light can be unequal.

[0052] According to one embodiment of the present invention, Figure 3 and Figure 4 As shown, the semi-mirror 12 is an electrically controlled semi-mirror, which transmits the light emitted by the LED light source 11 at the first moment and reflects the light emitted by the LED light source 11 at the second moment. In this embodiment, the electrically controlled semi-mirror switches between the transmission and reflection states at a certain frequency, transmitting the light emitted by the LED light source 11 at the first moment and reflecting the light emitted by the LED light source 11 at the second moment; the state switching frequency of the electrically controlled semi-mirror in this embodiment is relatively high, such as 45Hz\60Hz\75Hz\120Hz\145Hz, etc., and the above values ​​are only used as examples; the human eye cannot perceive the high-frequency mode switching of the electrically controlled semi-mirror, although there is only transmitted light at the first moment and only reflected light at the second moment, that is, the real image and the virtual image of the LED light source 11 are alternately displayed, but because the human eye cannot perceive the alternating frequency, the real image and the virtual image of the LED light source 11 exist simultaneously in the human eye, that is, two pixels in visual effect can be formed.

[0053] In the present embodiment, the electrically controlled half-mirror fully transmits the light emitted by the LED light source 11 at the first moment, and fully reflects the light emitted by the LED light source 11 at the second moment. Compared with the technical solution of using a physical half-mirror, in the present preferred solution, since the light emitted by the LED light source 11 can be fully transmitted and fully reflected, its visible brightness is greater than the technical solution of using a physical half-mirror, and the display effect is better.

[0054] According to one embodiment of the present invention, Figure 1 As shown, the reflective lens group 13 includes at least one reflective unit, and the reflective unit includes a first reflective mirror surface 131 for receiving the light reflected by the semi-mirror 12, a second reflective mirror surface 132 for receiving the light reflected by the first reflective mirror surface 131, and a third reflective mirror surface 133 for receiving the light reflected by the second reflective mirror surface 132. The light emitted by the third reflective mirror surface 133 is in the same visible range as the transmitted light of the semi-mirror 12. When there is only one reflective unit, two pixels on the visual effect can be formed in one display unit 1, such as Figure 1 As shown, when a reflective lens group 13 includes multiple reflective units, the display unit 1 can be provided with the same number of semi-transparent mirrors 12 to transmit and reflect the first reflected light again to form pixel points in visual effect. Figure 8 and Fig. 9 As shown, by adjusting the number of semi-transparent mirrors 12 and the number and setting angle of the reflective units, a technical solution of forming multiple visual pixel points by only one LED light source 11 can be realized, such as Figure 8 By setting two half-mirrors 12 and two reflecting units, three pixel points in visual effect can be formed; wherein the direction of the two half-mirrors 12 is the same as the direction of the reflecting unit; Fig. 9 Similarly, by setting two half-mirrors 12 and two reflecting units, three visual pixel points can be formed, but the two half-mirrors 12 are mirror images of each other and the two reflecting units are also mirror images of each other; in the above two schemes, the half-mirrors can be either physical half-mirrors or electrically controlled half-mirrors, preferably electrically controlled half-mirrors.

[0055] In this embodiment, the first reflecting mirror surface 131, the second reflecting mirror surface 132 and the third reflecting mirror surface 133 can be flat surfaces or curved surfaces; the transmitting mirror surface of the semi-transparent mirror 12 can also be flat surfaces or curved surfaces.

[0056] According to one embodiment of the present invention, Figure 5As shown, the multiple display units 1 are installed on a first circuit board 2 with a gap, the semi-mirror 12 and the first reflector 131 are arranged on the side of the first circuit board 2 facing the LED light source 11; the second reflector 132 and the third reflector 133 are arranged on the side of the first circuit board 2 away from the LED light source 11; the outgoing light of the first reflector 131 passes through the gap and is received by the second reflector 132, and the outgoing light of the third reflector 133 passes through the gap and is in the same visible range as the transmitted light of the semi-mirror 12. In this example, the display unit 1 is provided with a Figure 6 The bracket shown is installed on the first circuit board 2 with a gap, and the LED light source 11, the first reflector 131, the second reflector 132 and the third reflector 133 are arranged as shown in FIG. Figure 6 The bracket is installed on the bracket in the manner shown, and the bracket will not block the light in the projection light path and the reflection light path of the LED light source 11, and the bracket can be a transparent bracket. By setting a gap on the first circuit board 2, the semi-transparent mirror 12 and the first reflective mirror surface 131 are on the same side; the second reflective mirror surface 132 and the third reflective mirror surface 133 are on the same side, so that the center of gravity of the display device is close to the center of the first circuit board 2, which can effectively reduce the size in the thickness direction.

[0057] According to one embodiment of the present invention, Figure 7 As shown, the plurality of display units 1 are mounted on the second circuit board 3, and the semi-transparent mirror 12, the first reflective mirror 131, the second reflective mirror 132 and the third reflective mirror 133 are all arranged on the side of the second circuit board 3 facing the LED light source 11. Figure 7 As shown, the display unit 1 is installed on the second circuit board 3 without a gap. Compared with the previous embodiment, this embodiment can avoid punching holes on the circuit board.

[0058] According to one embodiment of the present invention, the polarization directions of the reflected light and the transmitted light are perpendicular to each other. In some cases, in order to pursue certain specific visual effects, or to cooperate with external auxiliary equipment to achieve 3D display effects, the polarization directions of the reflected light and the transmitted light are perpendicular to each other. When the transmitted light is P light, the reflected light is S light; when the projected light is S light, the reflected light is P light. In this embodiment, the half-mirror 12 can be a physical half-mirror or an electrically controlled half-mirror; both the physical half-mirror and the electrically controlled half-mirror can achieve light polarization, and this part of the technical principle belongs to the prior art and will not be elaborated here.

[0059] According to an embodiment of the present invention, in order to improve the resolution of an LED display device while taking into account energy consumption and heat generation, the present embodiment provides a display control method for an LED display device, wherein the display device comprises: a plurality of display units 1; the display unit 1 comprises an LED light source 11, a semi-transparent mirror 12 disposed above the LED light source 11, and a reflective lens group 13 for reflecting the LED light source 11; the semi-transparent mirror 12 transmits and reflects the light emitted by the LED light source 11, and the reflective lens group 13 is used to receive the LED light reflected by the semi-transparent mirror 12, so that the reflected light and the transmitted light are in the same visible range;

[0060] Controlling the semi-transparent mirror 12 to transmit the light emitted by the LED light source 11 at a first moment, and controlling the plurality of display units 1 to jointly display a first picture;

[0061] Control the semi-transparent mirror 12 to reflect the light emitted by the LED light source 11 at a second moment, and control the multiple display units 1 to jointly display a second picture;

[0062] The first picture and the second picture have the same visual effect.

[0063] In this embodiment, the half mirror 12 is an electrically controlled half mirror. The first picture and the second picture have the same visual effect. In this embodiment, the technical means for achieving the same visual effect include:

[0064] 1. The first picture and the second picture are exactly the same, for example, the pictures displayed are both image A;

[0065] 2. The first picture and the second picture are different, but both are partial pictures of the same picture. For example, the same picture is image A; image A is evenly divided into a number of partial images along the horizontal direction, the first picture is image A1 composed of all odd-numbered partial images; the second picture is image A2 composed of all even-numbered partial images.

[0066] 3. The first picture and the second picture are different, but both are partial pictures of the same picture. For example, the same picture is image A; image A is evenly divided into several partial images along the vertical direction, the first picture is image A1 composed of all odd-numbered partial images; the second picture is image A2 composed of all even-numbered partial images.

[0067] In the above-mentioned technical means 2 and technical means 3, the more the number of divisions, the better the display effect, but the specific number of divisions depends on the actual situation, as long as the visual residual principle can be used, the human eye can automatically combine the two images A1 and A1 into one image A. It should be noted that the division method is not limited to horizontal division or vertical division, and other inclined divisions or irregular divisions are equivalent to the technical solutions of horizontal division and vertical division.

[0068] According to one embodiment of the present invention, in order to achieve a 3D display effect in cooperation with an external auxiliary device such as 3D glasses, the present invention provides a 3D display control method for an LED display device, the display device comprising: a plurality of display units 1; the display unit 1 comprises an LED light source 11, a semi-transparent mirror 12 disposed above the LED light source 11, and a reflective lens group 13 for reflecting the LED light source 11; the semi-transparent mirror 12 transmits and reflects the light emitted by the LED light source 11, the reflective lens group 13 is used to receive the LED light reflected by the semi-transparent mirror 12, so that the reflected light and the transmitted light are in the same visible range, and the polarization directions of the reflected light and the transmitted light are perpendicular to each other by a method of changing the polarization direction through coating reflection or other methods;

[0069] Control the semi-transparent mirror 12 to transmit the light emitted by the LED light source 11 at a first moment, and control the multiple display units 1 to jointly display a third picture;

[0070] Control the semi-transparent mirror 12 to reflect the light emitted by the LED light source 11 at the second moment, and control the multiple display units 1 to jointly display the fourth picture;

[0071] The third frame and the fourth frame respectively display a left-eye frame and a right-eye frame of a 3D image.

[0072] In this embodiment, the third image and the fourth image have different polarization directions of light. The third image and the fourth image respectively display the left-eye image and the right-eye image of the same 3D image seen by a person's left and right eyes when watching a stereoscopic image. By matching them with 3D glasses (polarized glasses), a 3D visual effect can be achieved.

[0073] By converting the perspective of the same picture in advance, splitting it into a left-eye perspective picture and a right-eye perspective picture, and displaying it through the display device in the manner shown in this method, the 3D movie effect can be achieved in cooperation with 3D glasses. In this embodiment, the half mirror 12 is an electrically controlled half mirror. The half mirror 12 transmits the light emitted by the LED light source 11 at the first moment, and controls multiple display units 1 to jointly display the third picture; the half mirror 12 reflects the light emitted by the LED light source 11 at the second moment, and controls multiple display units 1 to jointly display the fourth picture. The essence of the above content is that the half mirror 12 switches between transmission and reflection at a high frequency, playing the left-eye perspective picture during transmission and playing the right-eye perspective picture during reflection, and for the human eye, the left-eye picture and the right-eye picture are played at the same time. With the help of a pair of 3D glasses (polarized glasses), the viewer can be given the visual enjoyment of a 3D movie.

[0074] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An LED display device, characterized in that: include: A plurality of display units; the display units include an LED light source, a semi-transparent mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source; The semi-mirror transmits and reflects the light emitted by the LED light source, and the reflective lens group is used to receive the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are in the same visible range.

2. The LED display device according to claim 1, characterized in that: The semi-mirror is a physical semi-mirror, which transmits part of the light emitted by the LED light source and reflects part of the light emitted by the LED light source.

3. The LED display device according to claim 1, characterized in that: The semi-mirror is an electrically controlled semi-mirror, which transmits the light emitted by the LED light source at a first moment and reflects the light emitted by the LED light source at a second moment.

4. The LED display device according to claim 1, characterized in that: The reflective lens group includes at least one reflective unit, which includes a first reflective mirror surface for receiving light reflected by the semi-mirror, a second reflective mirror surface for receiving light reflected by the first reflective mirror surface, and a third reflective mirror surface for receiving light reflected by the second reflective mirror surface, and the output light of the third reflective mirror surface is in the same visible range as the transmitted light of the semi-mirror.

5. The LED display device according to claim 4, characterized in that: The multiple display units are installed on a first circuit board with a gap, and the semi-mirror and the first reflective mirror are arranged on the side of the first circuit board facing the LED light source; the second reflective mirror and the third reflective mirror are arranged on the side of the first circuit board away from the LED light source; the outgoing light of the first reflective mirror passes through the gap and is received by the second reflective mirror, and the outgoing light of the third reflective mirror passes through the gap and is in the same visible range as the transmitted light of the semi-mirror.

6. The LED display device according to claim 4, characterized in that: The multiple display units are installed on a second circuit board, and the semi-mirror, the first reflective mirror, the second reflective mirror and the third reflective mirror are all arranged on a side of the second circuit board facing the LED light source.

7. The LED display device according to claim 1, characterized in that: The reflected light reflected by the reflective lens group is parallel to the transmitted light of the semi-transparent mirror.

8. The LED display device according to claim 1, characterized in that: The polarization directions of the reflected light and the transmitted light are perpendicular to each other.

9. A display control method for an LED display device, characterized in that: The display device comprises: a plurality of display units; the display units comprise an LED light source, a semi-mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source; the semi-mirror transmits and reflects the light emitted by the LED light source, and the reflective lens group receives the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are within the same visual range; Controlling the semi-mirror to transmit the light emitted by the LED light source at a first moment, and controlling the plurality of display units to jointly display a first picture; Controlling the semi-mirror to reflect the light emitted by the LED light source at a second moment, and controlling the plurality of display units to jointly display a second picture; The first picture and the second picture have the same visual effect.

10. A display control method for an LED display device, characterized in that: The display device comprises: a plurality of display units; the display units comprise an LED light source, a semi-mirror disposed above the LED light source, and a reflective lens group for reflecting the LED light source; the semi-mirror transmits and reflects the light emitted by the LED light source, and the reflective lens group is used to receive the LED light reflected by the semi-mirror, so that the reflected light and the transmitted light are in the same visible range, and the polarization directions of the reflected light and the transmitted light are perpendicular to each other; Controlling the semi-mirror to transmit the light emitted by the LED light source at the first moment, and controlling the plurality of display units to jointly display a third picture; Controlling the semi-mirror to reflect the light emitted by the LED light source at the second moment, and controlling the plurality of display units to jointly display a fourth picture; The third frame and the fourth frame respectively display a left-eye frame and a right-eye frame of a 3D image.

Images