A polarized LED light-emitting device and a preparation method thereof

Abstract

The present invention relates to an LED display device, in particular to a polarized LED light-emitting device, which comprises a single light-emitting wafer and a polarized light-transmitting layer. The light-emitting wafer is located at the bottom layer of the LED light-emitting device. The light-emitting wafer includes R, G, and B color displays. The polarized light-transmitting layer is located directly above it. A protective film is provided on the outer layer of the polarized light-transmitting layer. A light-transmitting glue is filled between the light-emitting wafer and the polarized light-transmitting layer. There is a light-shielding component around the light-emitting wafer. This polarized LED light-emitting device reduces the difficulty of later production, reduces the thickness, reduces power consumption, improves the brightness and the effective visible range; adds the existing 3D polarization display method and is convenient for later maintenance.

Description

Technical Field

[0001] The present invention relates to an LED display device, and particularly to a polarized LED light-emitting device and a preparation method thereof. Background Art

[0002] Existing LED display screens are mainly divided into flat displays and 3D stereoscopic displays. Early LED display screens mainly used monochromatic or multi-color LED light-emitting beads, and the display content information was realized through the control circuit on the back, with a single color; with the progress of technology and the improvement of production processes, LED color display technology has been applied, and there are more applications such as outdoor curtain walls and advertising displays; the application of LED display technology by people has gradually expanded to media applications. The stereoscopic LED display screen that consumers can feel most clearly in close contact is the one using polarized LED display technology. The polarizing film used in traditional polarized LED stereoscopic display screens is generally made by pasting polarizers with inconsistent left and right circular polarizations through splicing or by patterning and combining a circular polarizing film with a phase compensation film.

[0003] The patent number is 201410010828.5, and the publication number is CN103700326B. The patent discloses a "polarized LED display screen based on a polarization mode and a forming method of a polarizing film". The main method adopted by this structure is to combine a convex-concave polarizing film with a polarization effect through a structure and an LED light-emitting device to reduce the display viewing angle problem caused by the height of the polarizing film.

[0004] The patent number is 201910496353.1, and the publication number is CN110098179A. The patent discloses a "patch LED lamp bead that emits polarized light and a batch production method thereof". The invention discloses the structure and batch production method of the patch LED lamp bead. When the polarizing film is pasted on each LED one by one, in actual application, it is also found that problems such as the polarization display range and brightness will directly affect the use experience. Especially in the use in a cinema, the visual experience is obvious. The additional polarizing film structure weakens the display range and brightness of the LED. In order to increase the brightness, the power of the lamp bead may need to be increased, so the heat generation of the display screen will increase, which will affect its heat dissipation during use and is prone to failures.

[0005] Therefore, in combination with the existing technology, using the principle of a dichroic transparent thin film of a polarizing film, which allows light vibrations parallel to the light-transmitting axis direction to pass through, while light perpendicular to this direction is absorbed, directly making the light guide layer on the LED light-emitting wafer polarized, and then directly adopting a patch process during screen production, greatly improving production efficiency and at the same time reducing the light-emitting thickness of the LED polarized screen. Summary of the Invention

[0006] The object of the present invention is to solve the above problems and provide a polarized LED lighting device and a manufacturing method thereof.

[0007] The technical solution of the present invention is as follows:

[0008] A polarized LED lighting device includes a single light-emitting chip and a polarized light-transmitting layer. The light-emitting chip is located at the bottom layer of the LED lighting device and includes R, G, and B color displays. The polarized light-transmitting layer is located directly above it. A protective film is provided on the outer layer of the polarized light-transmitting layer. A light-transmitting adhesive is filled between the light-emitting chip and the polarized light-transmitting layer. A light-shielding component is provided around the light-emitting chip.

[0009] The polarized light-transmitting layer uses two different light-transmitting adhesive materials. Among them, adhesive A is in the lower layer and adhesive B is in the upper layer. The contact surface between the two forms a wedge-shaped angle α with the light-emitting chip; or adhesive B is in the lower layer and adhesive A is in the upper layer, and the contact surface between the two forms a wedge-shaped angle α with the light-emitting chip; the values of the α and β angles enable the two light-emitting chips to form a 3D polarization effect.

[0010] The polarized light-transmitting layer can also adopt a multi-layer thin-film structure. Among them, two layers are glass slides, and long oval nanoparticles are embedded in the middle of both sides, making the glass slides have a linear grating effect, which can selectively transmit the light generated by the light-emitting chip.

[0011] A manufacturing method of the polarized LED lighting device according to claim 1 includes the following steps:

[0012] Step 1: Use an adhesive to fix the light-emitting chip on a circuit board or a bracket, and then use a wire to connect the positive and negative electrodes of the chip to the substrate.

[0013] Step 2: Preheat the semi-finished product formed in Step 1.

[0014] Step 3: Adjust the fixing bracket of the light-emitting chip so that the mold forms an angle α with the horizontal plane.

[0015] Step 4: Use a dispenser to apply adhesive A to the product in Step 3, with a thickness covering the light-emitting chip.

[0016] Step 5: Bake the semi-finished product in Step 4 to cure the adhesive A filled in each light-emitting chip bracket.

[0017] Step 6: Repeat Steps 1 to 5, adjust the mold to be horizontal, and fill with adhesive B.

[0018] Step 7: Tape the above-mentioned LED lamp beads into Tape A.

[0019] Step 8: Exchange the order of adhesives A and B, adjust the mold to form an angle β with the horizontal plane, and repeat Steps 1 to 7 to form Tape B of LED lamp beads.

[0020] Step 9: Tape the LED beads A and LED beads B onto the bracket according to the requirements of the display device.

[0021] The untaped LED beads completed in Step 6 are used as loose chips, and these loose chips are used as spare parts.

[0022] Advantages of the present invention

[0023] This polarized LED lighting device reduces the difficulty of later production, decreases the thickness, reduces power consumption, increases the brightness and effective visual range; adds the existing 3D polarization display method, which is convenient for later maintenance. Description of the drawings

[0024] Figure 1 It is a schematic diagram of this polarized LED lighting device.

[0025] Figure 2 It is a schematic sectional view.

[0026] Figure 3 It is this polarized LED lighting device.

[0027] Figure 4 It is this polarized LED lighting device.

[0028] Figure 5 It is an installation effect diagram of this polarized LED lighting device.

[0029] Figure 6 It is a manufacturing flow chart of this polarized LED lighting device.

[0030] 1 is a substrate, 2 is a polarized LED bead, 3 is a PVC outer support, 4 is a bottom support, 5 is glue A, 6 is glue B, 7 is a polarized glass slide, 8 is a positive electrode, 9 is a negative electrode, and 10 is a light-emitting chip. Detailed implementation manners

[0031] Example 1: Refer to Figures 1 to 6 , the technical solution of the present invention is:

[0032] A polarized LED lighting device includes a single light-emitting chip and a polarized light-transmitting layer. The light-emitting chip is located at the bottom layer of the LED lighting device, and the polarized light-transmitting layer is located directly above it. A protective film is provided on the outer layer of the polarized light-transmitting layer. A light-transmitting glue is filled between the light-emitting chip and the polarized light-transmitting layer, and a light-shielding component is provided around the light-emitting chip.

[0033] The polarized light-transmitting layer is a glass polarizer.

[0034] The glass polarizer adopts a multi-layer film structure, and long elliptical nanoparticles are embedded in one of the layers and sandwiched between two adjacent layers.

[0035] The described glass polarizer uses two different crystal materials, which are bonded together through a wedge structure and an adhesive. One is on the lower layer and the other is on the upper layer.

[0036] A polarized LED lighting device includes a single light-emitting wafer and a polarized light-transmitting layer. The light-emitting wafer is located at the bottom layer of the LED lighting device and includes R, G, and B color displays. The polarized light-transmitting layer is located directly above it. A protective film is provided on the outer layer of the polarized light-transmitting layer. A light-transmitting adhesive is filled between the light-emitting wafer and the polarized light-transmitting layer. There is a light-shielding component around the light-emitting wafer.

[0037] The described polarized light-transmitting layer uses two different light-transmitting adhesive materials, which form a wedge structure with an included angle of α between them. One type of adhesive, A, is on the lower layer and the other type of adhesive, B, is on the upper layer.

[0038] The described polarized light-transmitting layer uses two different light-transmitting adhesive materials, which form a wedge structure with an included angle of β between them. One type of adhesive, B, is on the lower layer and the other type of adhesive, A, is on the upper layer.

[0039] The included angle values of α and β enable the two light-emitting wafers to form a 3D polarization effect.

[0040] A manufacturing method of the polarized LED lighting device described in claim 1 includes the following steps:

[0041] Step 1: Use an adhesive to fix the light-emitting wafer on a circuit board or a bracket, and then use a wire to connect the positive and negative electrodes of the chip to the substrate.

[0042] Step 2: Preheat the semi-finished product formed in Step 1.

[0043] Step 3: Adjust the fixing bracket of the light-emitting wafer so that the mold makes an included angle of α with the horizontal plane.

[0044] Step 4: Use a dispensing machine to apply adhesive A to the product in Step 3, with a thickness covering the light-emitting wafer.

[0045] Step 5: Bake the semi-finished product in Step 4 to cure the adhesive A filled in each light-emitting wafer bracket.

[0046] Step 6: Repeat Steps 1 to 5, adjust the mold to be horizontal, and fill with adhesive B.

[0047] Step 7: Package the above-mentioned LED lamp beads into tape A.

[0048] Step 8: Swap the order of adhesives A and B, adjust the mold to make an included angle of β with the horizontal plane, and repeat Steps 1 to 7 to form tape B of LED lamp beads.

[0049] Step 9: Solder the LED tape A and the LED tape B to the bracket according to the requirements of the display device.

[0050] Embodiment 2: The drawings are omitted and are substantially the same as those in Embodiment 1. The difference lies in that the polarization light-transmitting layer adopts a multi-layer film structure, where two layers are glass slides, and long oval nanoparticles are embedded between the two layers, enabling the glass slides to have a linear grating effect and selectively transmit the light generated by the light-emitting wafers.

[0051] Step 1: Fix the LED chip on the circuit board or bracket using an adhesive, and then connect the positive and negative electrodes of the chip to the substrate using wires.

[0052] Step 2: Preheat the semi-finished product formed in Step 1.

[0053] Step 3: Use a dispenser to apply Glue A to the product in Step 3, with a thickness sufficient to cover the light-emitting wafer.

[0054] Step 4: Bake the semi-finished product in Step 3 to cure the light-transmitting glue filled in each LED lamp bead bracket.

[0055] Step 5: Paste the fabricated polarization laminated glass slide on the upper layer of the light-transmitting glue, paying attention to the direction.

[0056] Step 6: The above belongs to the LED lamp bead tape.

[0057] Step 7: Solder the light strips with different polarization directions to the bracket according to the requirements of the display device.

Claims

1. A polarized LED lighting device, comprising a single light-emitting wafer and a polarized light-transmitting layer. The light-emitting wafer is located at the bottom layer of the LED lighting device. The light-emitting wafer includes R, G, and B color displays. The polarized light-transmitting layer is located directly above it. A protective film is provided on the outer layer of the polarized light-transmitting layer. A light-transmitting adhesive is filled between the light-emitting wafer and the polarized light-transmitting layer. A light-shielding component is provided around the light-emitting wafer. Characterized in that, The polarized light-transmitting layer uses two different light-transmitting adhesive materials, namely adhesive A and adhesive B. Adhesive A is in the lower layer and adhesive B is in the upper layer. The contact surface between the two forms a wedge-shaped angle α with the light-emitting wafer; when adhesive B is in the lower layer and adhesive A is in the upper layer, the contact surface between the two forms a wedge-shaped angle β with the light-emitting wafer. The values of the α and β angles enable the two light-emitting wafers to form a 3D polarized display.

2. A manufacturing method of the polarized LED lighting device according to claim 1, Characterized in that, It includes the following steps: Step 1: Fix the light-emitting wafer on the circuit board or bracket using an adhesive, and then connect the positive and negative electrodes of the chip to the substrate using wires; Step 2: Preheat the semi-finished product formed in Step 1; Step 3: Adjust the fixing bracket of the light-emitting wafer to keep the mold at an angle α with the horizontal plane; Step 4: Use a dispensing machine to apply adhesive A to the product in Step 3, with a thickness covering the light-emitting wafer; Step 5: Bake the semi-finished product in Step 4 to cure the adhesive A filled in each light-emitting wafer bracket; Step 6: Repeat Steps 1 to 5, adjust the mold to be horizontal, and fill with adhesive B; Step 7: Tape the above-mentioned LED lamp beads into Tape A; Step 8: Exchange the order of adhesive A and adhesive B, adjust the mold to be at an angle β with the horizontal plane, and repeat Steps 1 to 7 to form Tape B of LED lamp beads; Step 9: Solder Tape A and Tape B of LED lamp beads to the bracket according to the requirements of the display device.

3. The manufacturing method of the polarized LED lighting device according to claim 2, Characterized in that, The untaped LED lamp beads after completing Step 6 are used as loose pieces, and these loose pieces are used as spare parts.

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