Polarized LED chip, package, module and display screen, 3D display device and method

Abstract

The present invention is applicable to the field of optoelectronic display technology, and provides a polarized LED chip, including: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, and a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located. The present invention reflects the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located through the reflective conductive layer, and uses the side where the substrate and the metal wire grid polarizing layer are located as the light-emitting surface of the polarized LED chip. There is no electrode blocking on the entire light-emitting surface, thereby increasing the light-emitting area. In addition, the metal wire grid polarizing layer itself does not absorb light energy, and the linearly polarized light reflected back will eventually be converted into unpolarized light again inside the polarized LED chip and received by the metal wire grid polarizing layer again, so the light utilization rate is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the field of optoelectronic display technology, and in particular relates to a polarized LED chip, a package, a module and a display screen, and a 3D display device and method. Background Art

[0002] The principle of viewing 3D images is that the left and right eyes of a person receive the left and right eye video images played in frame order, and then the left and right eye video images are synthesized by the brain to produce a 3D effect. With the development of LED display technology, LED screens are increasingly entering the field of indoor high-definition display, and how to use LED screens to achieve 3D display is gradually attracting attention.

[0003] As we all know, the realization of 3D display requires the light emitted by the screen to have polarization characteristics. The current LED display screen ensures the polarization characteristics by attaching a layer of polarizer on the screen. Figure 1A and Figure 1B As shown, the LED chip includes a substrate 11, a reflective conductive layer 12, a light-emitting layer 13, a transparent conductive layer 14, a first electrode 151 and a second electrode 152. When packaging, the first electrode 151 and the second electrode 152 are respectively welded to the first PCB electrode 161 and the second PCB electrode 162 of the PCB board 16 by a conductive wire A, wherein B is a welding point. After packaging, a layer of polarizer 17 is attached to the outside, so that the light finally emitted by the LED chip has polarization characteristics.

[0004] Due to the limitation of the working principle, the polarizer 17 allows part of the light emitted by the LED chip to pass through, while the other part of the light is absorbed and filtered out. The absorbed part of the light will eventually be converted into heat, causing the temperature of the polarizer 17 to rise rapidly and the aging speed to accelerate. More importantly, since the polarizer 17 only allows part of the light to pass through, the light utilization rate is low. Figure 1A It can be seen that the positions where the first electrode 151 and the second electrode 152 are located cannot emit light, and the light emitting surface of the entire LED chip is relatively small. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a polarized LED chip, aiming to improve the light output area and light utilization rate of the LED chip.

[0006] The embodiment of the present invention is implemented as follows: a polarized LED chip, the polarized LED chip comprising: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer toward the side where the substrate and the metal wire grid polarizing layer are located.

[0007] Furthermore, a transparent conductive layer is provided between the light-emitting layer and the substrate; a first electrode is provided on the transparent conductive layer, and a second electrode is provided on the light-reflecting conductive layer.

[0008] Furthermore, the metal wire grid polarizing layer is used to split the received unpolarized light into a transmitted first linear polarized light and a second linear polarized light reflected back into the polarized LED chip, and the second linear polarized light reflected back into the interior is finally received again by the metal wire grid layer as unpolarized light.

[0009] An embodiment of the present invention further provides a polarized LED package, which includes a base, wherein the base is provided with at least one mounting position, and a polarized LED chip as described above is mounted on each mounting position, and the polarized LED chip is encapsulated on the base by a packaging layer; each mounting position also has a metal lead led out, and the electrode of the polarized LED chip is electrically connected to the metal lead; inside the packaging layer, the part of the polarized LED chip except the light emitting surface is covered with a light-blocking material for preventing non-polarized light from leaking out.

[0010] Furthermore, the light emitting surface of the packaging layer is a plane, and a quarter-wavelength delay layer for converting the linearly polarized light emitted by the polarized LED chip into circularly polarized light is provided on the plane.

[0011] An embodiment of the present invention further provides a polarized LED module, which includes a PCB board, on which at least two polarized LED packages as described above are mounted, and each polarized LED package is connected to the PCB board circuit via a metal lead; wherein the polarization directions of the linear polarized light emitted by two polarized LED packages adjacent in the horizontal and / or vertical direction are orthogonal; the polarized LED module also includes a quarter-wavelength delay layer for converting the linear polarized light emitted by the polarized LED chip into circularly polarized light, and the quarter-wavelength delay layer covers the light emitting surfaces on the packaging layers of all polarized LED packages.

[0012] An embodiment of the present invention further provides a polarized LED module, which includes a PCB board, on which at least two polarized LED chips as described above are welded, and the electrodes of the polarized LED chips are electrically connected to the PCB board; wherein the polarization directions of the linearly polarized light emitted by two adjacent polarized LED chips are orthogonal; the surfaces of the polarized LED chip except the light-emitting surface are covered with a light-blocking material for preventing non-polarized light from leaking out; a protective layer is filled on the polarized LED chip and between the polarized LED chips, and the light-emitting surface outside the protective layer is provided with a quarter-wavelength delay layer for converting the linearly polarized light emitted by the polarized LED chip into circularly polarized light.

[0013] An embodiment of the present invention further provides an LED display screen, which has a first pixel area and a second pixel area, the first pixel area includes a plurality of first pixel points, the second pixel area includes a plurality of second pixel points, the first pixel points and the second pixel points are arranged alternately in the horizontal direction and / or the vertical direction; the polarized LED chips as described above are installed in both the first pixel points and the second pixel points; when the polarized LED chip in the first pixel point is driven, the light emitted by the first pixel point has a first polarization state; when the polarized LED chip in the second pixel point is driven, the light emitted by the second pixel point has a second polarization state, and the first polarization state is orthogonal to or opposite to the second polarization state.

[0014] An embodiment of the present invention further provides an LED display screen, which has a plurality of pixel positions, each of which is equipped with a first polarized LED chip and a second polarized LED chip, and the first polarized LED chip and the second polarized LED chip have the structure of the polarized LED chip as described above; when the first polarized LED chip is driven, the light emitted by the pixel position has a first polarization state, and when the second polarized LED chip is driven, the light emitted by the pixel position has a second polarization state, and the first polarization state is orthogonal to or opposite to the second polarization state.

[0015] An embodiment of the present invention also provides a 3D display device, comprising: an LED display screen as described above; a receiving circuit for receiving a left-eye image and a right-eye image; a left-eye image driving circuit for driving a first polarized LED chip in each pixel position to display the received left-eye image; and a right-eye image driving circuit for driving a second polarized LED chip in each pixel position to display the received right-eye image; wherein the left-eye image driving circuit and the right-eye image driving circuit are driven simultaneously.

[0016] The embodiment of the present invention further provides an image display method of a 3D display device, wherein the 3D display device includes an LED display screen, wherein the LED display screen has a plurality of pixel positions, wherein a first polarized LED chip and a second polarized LED chip are installed in each pixel position, and wherein the first polarized LED chip and the second polarized LED chip have the structure of the polarized LED chip described above;

[0017] The image display method comprises the following steps:

[0018] Driving the first polarized LED chip in each pixel position at the current timing to display the received left-eye image, so that the pixel position emits light having a first polarization state;

[0019] In the next timing, the second polarized LED chip in each pixel is driven to display the received right-eye image, so that the pixel emits light with a second polarization state; the first polarization state is orthogonal to or opposite to the second polarization state.

[0020] The polarized LED chip provided by the embodiment of the present invention reflects the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located through the reflective conductive layer, and uses the side where the substrate and the metal wire grid polarizing layer are located as the light-emitting surface of the polarized LED chip. There is no electrode blocking on the entire light-emitting surface, thereby increasing the light-emitting area. In addition, the metal wire grid polarizing layer itself does not absorb light energy, and the linearly polarized light reflected back will eventually be converted into unpolarized light again inside the polarized LED chip and received by the metal wire grid polarizing layer again, so the light utilization rate is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1A It is a structural diagram of a polarized LED chip provided by the prior art;

[0022] Figure 1B It is a schematic diagram of the installation of polarized LED chips provided by the prior art;

[0023] Figure 2 is a structural principle diagram of a polarized LED chip provided by a first embodiment of the present invention;

[0024] Figure 3 is a wire grid structure diagram of a metal wire grid polarizing layer in a first embodiment of the present invention;

[0025] Figure 4 yes Figure 3 Optical schematic diagram of the wire grid structure polarizing unpolarized light;

[0026] Figure 5A A structural diagram of a first polarized LED package provided by a second embodiment of the present invention is shown;

[0027] Figure 5B A structural diagram of a second polarized LED package provided by a second embodiment of the present invention is shown;

[0028] Figure 6 is a structural diagram of a first polarized LED module provided by a third embodiment of the present invention;

[0029] Figure 7 is a structural diagram of a second polarized LED module provided by a third embodiment of the present invention;

[0030] Figures 8A-8D is a structural design diagram of an LED display screen provided by a fourth embodiment of the present invention;

[0031] Fig. 9 is a structural design diagram of an LED display screen provided by a fifth embodiment of the present invention;

[0032] Fig.10 is a structural diagram of a 3D display device using the LED display screen of the fifth embodiment provided by a sixth embodiment of the present invention;

[0033] Fig.11A yes Fig.10 A schematic diagram showing a receiving circuit in a 3D display device using one receiving channel;

[0034] Fig. 11B yes Fig.10 A schematic diagram showing that a receiving circuit in a 3D display device uses two receiving channels;

[0035] Fig.12 is a flowchart of an image display method of a 3D display device provided by a seventh embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0037] The embodiment of the present invention is implemented based on an inverted LED chip, wherein the reflective conductive layer and the substrate are located on different sides of the light-emitting layer. The reflective conductive layer is used to reflect the light emitted by the light-emitting layer toward the side where the substrate and the metal wire grid polarizing layer are located, and the metal wire grid polarizing layer serves as the light-emitting surface of the polarized LED chip.

[0038] Based on the above principles, Figure 2 The structure principle of the polarized LED chip provided by the first embodiment of the present invention is shown. Figure 2The polarized LED chip includes a substrate 21, a light-emitting layer 23, and a light-reflecting conductive layer 24. The light-reflecting conductive layer 24 and the substrate 21 are located on different sides of the light-emitting layer 23, that is, one of the light-reflecting conductive layer 24 and the substrate 21 is on one side of the light-emitting layer 23, and the other is on the other side of the light-emitting layer 23.

[0039] The side of the substrate 21 away from the light emitting layer 23 is provided with a metal wire grid polarizing layer 26, which serves as the light emitting surface of the polarized LED chip. The reflective conductive layer 24 is used to reflect the light emitted by the light emitting layer 23 to the side where the substrate 21 and the metal wire grid polarizing layer 26 are located.

[0040] A transparent conductive layer 22 is provided between the light-emitting layer and the substrate, a first electrode 251 is provided on the transparent conductive layer 22, and a second electrode 252 is provided on the light-reflecting conductive layer 24. When the positive and negative electrodes of the power supply are connected to the first electrode 251 and the second electrode 252 respectively, a circuit is formed between the first electrode 251, the transparent conductive layer 22, the light-emitting layer 23, the light-reflecting conductive layer 24, and the second electrode 252, and the light-emitting layer 23 emits energy in the form of photons after being powered on, that is, it emits light.

[0041] The light emitted by the light-emitting layer 23 is unpolarized light, part of which propagates directly to the side where the substrate 21 and the metal wire grid polarizing layer 26 are located, and another part propagates in the direction where the reflective conductive layer 24 is located. At this time, the reflective conductive layer 24 reflects the received light to the side where the substrate 21 and the metal wire grid polarizing layer 26 are located.

[0042] The metal wire grid polarizing layer 26 has Figure 3 In the wire grid structure shown, the wire grids are uniformly arranged along a preset direction. When the light reaches the metal wire grid polarizing layer 26, it will be split by the metal wire grid polarizing layer 26. The metal wire grid polarizing layer 26 allows a portion of the light to pass through. The light that passes through is linearly polarized light, and the polarization direction is compatible with the arrangement direction of the wire grid, which is recorded as the first linear polarized light (for example, it can be P light). The remaining part of the light is reflected by the metal wire grid polarizing layer 26, and the reflected light is also linearly polarized light, and the polarization direction is not compatible with the arrangement direction of the wire grid, which is recorded as the second linear polarized light (for example, it can be S light). Figure 4 shown.

[0043] After the second linear polarized light is reflected back into the polarized LED chip, it may be directly received by the light-emitting layer 23. The light-emitting layer 23 absorbs light energy to enhance its own energy, and then emits unpolarized light again. This is equivalent to converting the reflected second linear polarized light into new unpolarized light. The unpolarized light will be transmitted and reflected by the metal wire grid polarizing layer 26 again to repeat the above process. Therefore, this process is equivalent to not wasting light energy, so that the utilization rate of light is improved. If the second linear polarized light is not absorbed by the light-emitting layer 23 after being reflected back into the polarized LED chip, it will be folded back multiple times inside. If the structural material inside the polarized LED chip is designed to have non-polarization-maintaining characteristics, then after multiple foldings, the second linear polarized light will be converted back into unpolarized light again and be transmitted and reflected by the metal wire grid polarizing layer 26 again to repeat the above process.

[0044] It can be seen that the metal wire grid polarizing layer 26 splits the received unpolarized light into a transmitted first linear polarized light and a second linear polarized light reflected back into the polarized LED chip, and the second linear polarized light reflected back into the interior is finally received by the metal wire grid polarizing layer again as unpolarized light. In this process, the metal wire grid polarizing layer 26 itself does not absorb light energy, and the reflected linear polarized light will eventually be converted into unpolarized light again inside the polarized LED chip and received by the metal wire grid polarizing layer again, so the light utilization rate is greatly improved. Moreover, the side where the substrate and the metal wire grid polarizing layer are located is used as the light emitting surface of the polarized LED chip, and there is no electrode blocking on the entire light emitting surface, thereby increasing the light emitting area.

[0045] Figure 5A The first polarized LED package provided by the second embodiment of the present invention is shown, which is applicable to the Chip LED packaging technology. Figure 5A The polarized LED package includes a base 511, and the base 511 is provided with at least one mounting position, and each mounting position is mounted with a polarized LED chip as described in the first embodiment above, and the polarized LED chip is encapsulated on the base by a packaging layer 512.

[0046] The base 511 may be made of an insulating substrate material, and the packaging layer 512 may be made of a transparent packaging material, such as epoxy resin or silicone.

[0047] Furthermore, each of the mounting positions is also led out with a metal lead 513, and the electrode of the polarized LED chip is electrically connected to the metal lead 513 through a conductive ball 514. The light-emitting surface of the encapsulation layer 512 is a plane, and a quarter-wavelength delay layer 515 is provided on the plane. The quarter-wavelength delay layer 515 is used to phase-modulate the linearly polarized light emitted by the polarized LED chip and convert it into circularly polarized light, which can be achieved by, for example, a quarter-wave plate.

[0048] In addition, inside the packaging layer 512, the polarized LED chip except the light emitting surface is covered with a light blocking material 516 to prevent non-polarized light from leaking out and affecting the polarization degree of the overall light emitted by the chip.

[0049] Figure 5B The second polarized LED package provided by the second embodiment of the present invention is shown, which is applicable to the TOP LED packaging technology. Figure 5A The difference is that the base 521 is an injection-molded insulating material having a groove, and the mounting position is located in the groove of the base 521 .

[0050] A polarized LED chip as described in the first embodiment is mounted on each of the mounting positions. The polarized LED chip is packaged on the base 512 by a packaging layer 522 .

[0051] The base 512 may be an insulating material formed by injection molding, and the packaging layer 522 may be made of a transparent packaging material, such as epoxy resin or silicone.

[0052] Furthermore, each of the mounting positions is also led out with a metal lead 523, and the electrode of the polarized LED chip is electrically connected to the metal lead 523 through a conductive ball 524. The light-emitting surface of the encapsulation layer 522 is a plane, and a quarter-wavelength delay layer 525 is provided on the plane. The quarter-wavelength delay layer 525 is used to phase modulate the linearly polarized light emitted by the polarized LED chip and convert it into circularly polarized light, which can be achieved by, for example, a quarter-wave plate.

[0053] In addition, inside the packaging layer 522, the polarized LED chip except the light emitting surface is covered with a light blocking material 526 to prevent non-polarized light from leaking out and affecting the polarization degree of the overall light emitted by the chip.

[0054] The third embodiment of the present invention provides a first polarized LED module, which adopts Figure 5A and Figure 5B The package structure shown is mounted on a PCB substrate. Figure 6 As shown (only the Chip LED package is taken as an example, the TOPLED package has the same principle), the polarized LED module provided in the third embodiment includes a PCB board 61, and at least two polarized LED packages as described in the second embodiment are mounted on the PCB board 61, and each polarized LED package is electrically connected to the PCB board 61 through its own metal lead.

[0055] Among them, the polarization directions of the linear polarized light emitted by two adjacent polarized LED packages in the horizontal and / or vertical direction are orthogonal. For example, the light emitted by the 1st, 3rd, 5th, 7th, etc. odd-numbered polarized LED packages in the horizontal and / or vertical direction is P light, and the light emitted by the 2nd, 4th, 6th, 8th, etc. even-numbered polarized LED packages is S light.

[0056] Furthermore, the polarized LED module also includes a quarter-wavelength delay layer 62, which covers the light-emitting surface of the packaging layer of all polarized LED packages and is used to phase-modulate the linearly polarized light emitted by the polarized LED chip and convert it into circularly polarized light, which can be achieved by, for example, a quarter-wave plate.

[0057] The third embodiment of the present invention provides a second polarized LED module, which is obtained by welding the polarized LED chip provided in the first embodiment on a PCB substrate. Figure 7 As shown, the second polarized LED module provided by the third embodiment includes a PCB board 71, on which at least two polarized LED chips as described in the first embodiment are welded, and electrodes of the polarized LED chips are electrically connected to the PCB board 71, wherein the polarization directions of the linear polarized light emitted by two adjacent polarized LED chips are orthogonal.

[0058] In order to prevent non-polarized light from leaking out and affecting the polarization of the overall light output of the chip, all surfaces of the polarized LED chip except the light output surface are covered with light-blocking materials.

[0059] A protective layer 72 is filled on each polarized LED chip and between each polarized LED chip, and a quarter-wavelength delay layer is provided outside the protective layer 72. The protective layer 72 can be made of epoxy resin or silicone.

[0060] It should be noted that the two polarized LED modules provided in the third embodiment can be long strip modules in a one-dimensional direction, that is, the polarized LED chips are arranged on the PCB board along only one direction, or they can be LED matrix modules in a two-dimensional direction, and the polarized LED chips are arranged on the PCB board along two directions.

[0061] Figures 8A-8D The LED display screen provided by the fourth embodiment of the present invention is shown, and the LED display screen has a first pixel area and a second pixel area, the first pixel area includes a plurality of first pixel points, the second pixel area includes a plurality of second pixel points, and the first pixel points and the second pixel points are arranged alternately in the horizontal direction and / or the vertical direction; the polarized LED chip described in the first embodiment is installed in the first pixel points and the second pixel points. Figures 8A-8D :

[0062] Fig. 8A Polarized LED chips A that emit P light and polarized LED chips B that emit S light are arranged alternately in the horizontal direction. The 1st, 3rd, 5th and other odd-numbered columns are all polarized LED chips A that emit P light, and the 2nd, 4th, 6th and other even-numbered columns are all polarized LED chips B that emit S light. A and B are arranged alternately in each row.

[0063] Figure 8B Polarized LED chips A that emit P light and polarized LED chips B that emit S light are arranged alternately in the vertical direction. The 1st, 3rd, 5th and other odd-numbered rows are all polarized LED chips A that emit P light, and the 2nd, 4th, 6th and other even-numbered rows are all polarized LED chips B that emit S light. A and B are arranged alternately in each column.

[0064] Figure 8C Polarized LED chips A that emit P light and polarized LED chips B that emit S light are alternately arranged in the horizontal and vertical directions, and A and B are alternately arranged in each row and column to form a chessboard structure.

[0065] Fig.8D Polarized LED chips B that emit P light and polarized LED chips A that emit S light are alternately arranged in the horizontal and vertical directions, and B and A are alternately arranged in each row and column to form a chessboard structure.

[0066] When the polarized LED chip A in the first pixel is driven, the light emitted by the first pixel has a first polarization state; when the polarized LED chip B in the second pixel is driven, the light emitted by the second pixel has a second polarization state, and the first polarization state is orthogonal or opposite to the second polarization state, wherein the polarization state "orthogonal" refers to linear polarized light, which means that the first and second pixel areas directly emit the linear polarized light emitted by the polarized LED chips A and B, and the polarization state "opposite" refers to circular polarized light, which means that the first and second pixel areas convert the linear polarized light emitted by the polarized LED chips A and B into circular polarized light using a quarter-wavelength delay and then emit it.

[0067] Fig. 9 The LED display screen provided by the fifth embodiment of the present invention is shown. In this embodiment, the LED display screen has a plurality of pixel positions, each pixel position corresponds to a pixel of the displayed image. A first polarized LED chip A and a second polarized LED chip B are installed in each pixel position, that is, the first polarized LED chip A and the second polarized LED chip B in each pixel position are used to display the same pixel in the displayed image. The first polarized LED chip A and the second polarized LED chip B have the structure of the polarized LED chip described in the first embodiment.

[0068] In this embodiment, the driving of the first polarized LED chip A and the driving of the second polarized LED chip B are performed simultaneously, and when the first polarized LED chip A is driven, the light emitted by the pixel position has a first polarization state, and when the second polarized LED chip B is driven, the light emitted by the pixel position has a second polarization state, and the first polarization state is orthogonal or opposite to the second polarization state. The meanings of the polarization states "orthogonal" and "opposite" are the same as those in the fourth embodiment and are not repeated here.

[0069] The LED display screen provided in this embodiment can be used for 3D display and can be implemented in conjunction with linear polarized or circular polarized 3D glasses. Since the first polarized LED chip A and the second polarized LED chip B are driven at the same time, it is equivalent to that the entire LED display screen can display the left eye image and the right eye image at the same time, which means that there is no longer a time difference when the left and right eyes receive the left and right eye images that constitute a complete 3D picture, and the brain is more likely to synthesize the left and right eye images into a 3D picture. Among them, the left eye image displayed by the first polarized LED chip A in each pixel position is received by the lens worn by the left eye, and at the same time, the right eye image displayed by the second polarized LED chip B in each pixel position is received by the lens worn by the right eye.

[0070] Fig.10 The sixth embodiment of the present invention provides a 3D display device using the LED display screen of the fifth embodiment, including: an LED display screen 1001 , a receiving circuit 1002 , a left-eye image driving circuit 1003 , and a right-eye image driving circuit 1004 .

[0071] The LED display screen 1001 has the structure and performance described in the fifth embodiment.

[0072] The receiving circuit 1002 is used to receive a left-eye image and a right-eye image.

[0073] The sources of the left eye image and the right eye image can be from the same video source device, which outputs the left eye image and the right eye image alternately in a timing sequence. For example, the left eye image frame is output at the odd timing sequence of 1, 3, 5, 7, and the right eye image frame is output at the even timing sequence of 2, 4, 6, 8, etc.

[0074] The sources of the left-eye image and the right-eye image can also be two different video source devices, one video source device is specifically used to output the left-eye image frame, and the other video source device is specifically used to output the right-eye image frame, and the left and right eye image frames that constitute a complete 3D picture are output by the two video source devices at the same time.

[0075] The receiving circuit 1002 can be designed to have a receiving channel A, such as Fig.11AAs shown, no matter one video source device or two video source devices are used, the receiving channel A receives the left eye image and the right eye image alternately in time sequence.

[0076] The receiving circuit 1002 can also be designed to have two receiving channels, such as Fig. 11B As shown, no matter one video source device or two video source devices are used, the receiving channel A1 is used to receive the left eye image, and the receiving channel A2 is used to receive the right eye image.

[0077] The receiving channel A, receiving channel A1 and receiving channel A2 may be a hardware structure, a software structure or a combination of hardware and software structures capable of receiving video source signals.

[0078] The left-eye image driving circuit 1003 is used to drive the first polarized LED chip in each pixel position to display the received left-eye image.

[0079] The right-eye image driving circuit 1004 is used to drive the second polarized LED chip in each pixel position to display the received right-eye image.

[0080] Since the left-eye image driving circuit 1003 and the right-eye image driving circuit 1004 are driven simultaneously, the entire LED display screen 1001 can display the left-eye image and the right-eye image at the same time. Moreover, even if the receiving circuit 1002 does not receive the left-eye image and the right-eye image at the same time (for example, the receiving circuit 1002 has only one receiving channel), the left-eye image driving circuit 1003 and the right-eye image driving circuit 1004 will be controlled to drive simultaneously only after the receiving circuit 1002 has received the left-eye image and the right-eye image belonging to the same 3D picture.

[0081] Fig.12 The image display method provided by the seventh embodiment of the present invention is shown. The image display method is applicable to the 3D display device provided by the sixth embodiment. The method comprises the following steps:

[0082] Left-eye image display step S121, driving the first polarized LED chip in each pixel position to display the received left-eye image, so that the pixel position emits light with a first polarization state;

[0083] In the right eye image display step S122, the second polarized LED chip in each pixel is driven to display the received right eye image, so that the pixel emits light having a second polarization state; the first polarization state is orthogonal to or opposite to the second polarization state.

[0084] The first polarization state is orthogonal or opposite to the second polarization state, and the specific meaning is as described above and will not be repeated here. The left eye image display step 121 and the right eye image display step 122 are performed simultaneously so that the entire LED display screen 1001 can display the left eye image and the right eye image at the same time.

[0085] In the above embodiments, the LED screen using linear polarized light only needs to use a reverse-mounted polarized LED chip with a metal wire grid in the LED package to generate the light. For the combination of different linear polarization states, please refer to Table 1 below:

[0086] Table 1

[0087] In the above embodiments, the LED screen using circular polarized light needs to use a reverse-mounted polarized LED chip with a metal wire grid in the LED package to first generate linear polarized light, and then cooperate with a quarter-wave plate on the surface of the LED package or LED module to generate different circular polarized lights of group A and group B. For the combination of different circular polarization states, please refer to Table 2 below:

[0088]

[0089] Table 2

[0090] The "angle of the metal wire grid" in Table 1 and Table 2 refers to the angle between the arrangement direction of the metal wire grid and the horizontal direction of the eyes of the audience watching the 3D screen. The direction of the metal wire grid on the polarized LED chip is consistent in the package, module box, and the entire display screen.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polarized LED package, characterized in that: The polarized LED package body comprises a base, the base is provided with at least one mounting position, a polarized LED chip is mounted on each mounting position, and the polarized LED chip is packaged on the base by a packaging layer; The polarized LED chip comprises: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; a transparent conductive layer is provided between the light-emitting layer and the substrate; a first electrode is provided on the transparent conductive layer, and a second electrode is provided on the reflective conductive layer; the metal wire grid polarizing layer is used to split the received unpolarized light into a transmitted first linear polarized light and a second linear polarized light reflected back into the interior of the polarized LED chip, the second linear polarized light reflected back into the interior is received by the light-emitting layer or converted into unpolarized light after being folded back multiple times inside the chip and then received by the metal wire grid polarizing layer again, wherein the structural material inside the internal sheet of the polarized LED chip is designed to have a non-polarization-maintaining characteristic so that the light folded back multiple times inside the chip is converted into unpolarized light; Each installation position also leads out a metal lead, and the electrode of the polarized LED chip is electrically connected to the metal lead; inside the packaging layer, the part of the polarized LED chip except the light emitting surface is covered with a light blocking material for preventing non-polarized light from leaking out.

2. The polarized LED package according to claim 1, wherein: The light-emitting surface of the packaging layer is a plane, and a quarter-wavelength delay layer for converting the linearly polarized light emitted by the polarized LED chip into circularly polarized light is arranged on the plane.

3. A polarized LED module, characterized in that: The polarized LED module comprises a PCB board, on which at least two polarized LED packages according to claim 1 are mounted, and each polarized LED package is electrically connected to the PCB board through a metal lead; wherein the polarization directions of the linearly polarized lights emitted by two polarized LED packages adjacent in the horizontal and / or vertical directions are orthogonal; The polarized LED module further comprises a quarter-wavelength delay layer for converting the linearly polarized light emitted by the polarized LED chip into circularly polarized light, and the quarter-wavelength delay layer covers the light emitting surface of the packaging layer of all polarized LED packages.

4. A polarized LED module, characterized in that: The polarized LED module comprises a PCB board, on which at least two polarized LED chips are welded, and electrodes of the polarized LED chips are electrically connected to the PCB board; wherein the polarization directions of the linearly polarized light emitted by two adjacent polarized LED chips are orthogonal; and all surfaces of the polarized LED chip except the light emitting surface are covered with a light-blocking material for preventing non-polarized light from leaking out; The polarized LED chip comprises: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; a transparent conductive layer is provided between the light-emitting layer and the substrate; a first electrode is provided on the transparent conductive layer, and a second electrode is provided on the reflective conductive layer; the metal wire grid polarizing layer is used to split the received unpolarized light into a transmitted first linear polarized light and a second linear polarized light reflected back into the interior of the polarized LED chip, the second linear polarized light reflected back into the interior is received by the light-emitting layer or converted into unpolarized light after being folded back multiple times inside the chip and then received by the metal wire grid polarizing layer again, wherein the structural material inside the internal sheet of the polarized LED chip is designed to have a non-polarization-maintaining characteristic so that the light folded back multiple times inside the chip is converted into unpolarized light; A protective layer is filled on the polarized LED chip and between the polarized LED chips. The light-emitting surface outside the protective layer is provided with a quarter-wavelength delay layer for converting the linearly polarized light emitted by the polarized LED chip into circularly polarized light.

5. An LED display screen, characterized in that: The LED display screen has a first pixel area and a second pixel area, the first pixel area includes a plurality of first pixel points, the second pixel area includes a plurality of second pixel points, the first pixel points and the second pixel points are arranged alternately in the horizontal direction and / or the vertical direction; the first pixel points and the second pixel points are both installed with packaged polarized LED chips; The polarized LED chip comprises: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; a transparent conductive layer is provided between the light-emitting layer and the substrate; a first electrode is provided on the transparent conductive layer, and a second electrode is provided on the reflective conductive layer; the metal wire grid polarizing layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; The received unpolarized light is split into a transmitted first linear polarized light and a second linear polarized light reflected back into the interior of the polarized LED chip, the second linear polarized light reflected back into the interior is received by the light-emitting layer or converted into unpolarized light after being folded back multiple times inside the chip and then received by the metal wire grid polarizing layer again, wherein the structural material inside the internal sheet of the polarized LED chip is designed to have a non-polarization-maintaining property so that the light folded back multiple times inside the chip is converted into unpolarized light; inside the packaging layer, the portion of the polarized LED chip except the light-emitting surface is covered with a light-blocking material for preventing the leakage of unpolarized light; When the polarized LED chip in the first pixel is driven, the light emitted by the first pixel has a first polarization state; when the polarized LED chip in the second pixel is driven, the light emitted by the second pixel has a second polarization state, and the first polarization state is orthogonal to or opposite to the second polarization state.

6. An LED display screen, characterized in that: The LED display screen has a plurality of pixel positions, each pixel position is installed with a packaged first polarized LED chip and a second polarized LED chip, and the first polarized LED chip and the second polarized LED chip have the structure of polarized LED chips; The polarized LED chip comprises: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; a transparent conductive layer is provided between the light-emitting layer and the substrate; a first electrode is provided on the transparent conductive layer, and a second electrode is provided on the reflective conductive layer; the metal wire grid polarizing layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; The received unpolarized light is split into a transmitted first linear polarized light and a second linear polarized light reflected back into the interior of the polarized LED chip, the second linear polarized light reflected back into the interior is received by the light-emitting layer or converted into unpolarized light after being folded back multiple times inside the chip and then received by the metal wire grid polarizing layer again, wherein the structural material inside the internal sheet of the polarized LED chip is designed to have a non-polarization-maintaining property so that the light folded back multiple times inside the chip is converted into unpolarized light; inside the packaging layer, the portion of the polarized LED chip except the light-emitting surface is covered with a light-blocking material for preventing the leakage of unpolarized light; When the first polarized LED chip is driven, the light emitted by the pixel has a first polarization state, and when the second polarized LED chip is driven, the light emitted by the pixel has a second polarization state, and the first polarization state is orthogonal to or opposite to the second polarization state.

7. A 3D display device, characterized in that: include: The LED display screen as claimed in claim 6; A receiving circuit, used for receiving a left-eye image and a right-eye image; A left-eye image driving circuit, used to drive the first polarized LED chip in each pixel position to display the received left-eye image; The right eye image driving circuit is used to drive the second polarized LED chip in each pixel position to display the received right eye image; wherein the left eye image driving circuit and the right eye image driving circuit are driven simultaneously.

8. An image display method of a 3D display device, characterized in that: The 3D display device comprises an LED display screen, wherein the LED display screen has a plurality of pixel positions, each pixel position is provided with a packaged first polarized LED chip and a second polarized LED chip, wherein the first polarized LED chip and the second polarized LED chip both comprise: a light-emitting layer, a reflective conductive layer, and a substrate; the reflective conductive layer and the substrate are located on different sides of the light-emitting layer, a metal wire grid polarizing layer is provided on a side of the substrate away from the light-emitting layer, and the metal wire grid polarizing layer serves as a light-emitting surface of the polarized LED chip; the reflective conductive layer is used to reflect the light emitted by the light-emitting layer to the side where the substrate and the metal wire grid polarizing layer are located; a transparent conductive layer is provided between the light-emitting layer and the substrate; The transparent conductive layer is provided with a first electrode, and the reflective conductive layer is provided with a second electrode; the metal wire grid polarizing layer is used to split the received unpolarized light into a transmitted first linear polarized light and a second linear polarized light reflected back into the interior of the polarized LED chip, the second linear polarized light reflected back into the interior is received by the light-emitting layer or converted into unpolarized light after being folded back multiple times inside the chip and then received by the metal wire grid polarizing layer again, wherein the structural material inside the internal sheet of the polarized LED chip is designed to have a non-polarization-maintaining characteristic so that the light folded back multiple times inside the chip is converted into unpolarized light; inside the packaging layer, the part of the polarized LED chip except the light-emitting surface is covered with a light-blocking material for preventing the leakage of unpolarized light; The image display method comprises: Left-eye image display step: driving the first polarized LED chip in each pixel to display the received left-eye image, so that the pixel emits light having a first polarization state; Right eye image display step: driving the second polarized LED chip in each pixel position to display the received right eye image, so that the pixel position emits light with a second polarization state; The first polarization state is orthogonal to or opposite to the second polarization state, and the left-eye image display step and the right-eye image display step are performed simultaneously.

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