Optical fiber light guide panel and layered manufacturing method thereof

Abstract

The present invention relates to a fiber optic light guide panel and a layered manufacturing method thereof, and belongs to the technical field of LED display screens. The fiber optic light guide panel is equipped with a light guide component without circuits and electronic devices on the light-emitting surface of the display light board; the light guide component includes a rear panel, a fiber optic array unit and a front panel; each pixel at the rear panel end and the front panel end is connected through the fiber optic array unit. The rear panel and the front panel of the light guide component are manufactured by injection molding; the fiber optic array unit of the light guide component is manufactured layer by layer by laying out the fiber optic layer through a fiber optic curing device and curing it with a photosensitive adhesive. The fiber optic light guide panel of the present invention adopts a high-precision integrated electrical part. This structure reduces the overall size and can be encapsulated in a sealed housing, effectively improving the protection level of the housing, and is suitable for more severe application environments.

Description

Technical Field

[0001] The invention relates to an optical fiber light guide panel and a layered manufacturing method thereof, and belongs to the technical field of LED display screens. Background Art

[0002] The display light board of an LED display is a matrix of several low-power LED lamp beads packaged on a substrate to form a display light board. This display light board is then covered with a protective mask to form a display module. The display modules are then spliced ​​into an LED display screen to achieve a visually seamless splicing. With the development of fine-pitch display screens, the pixel pitch continues to shrink to below 1mm, and the package size of LED lamp beads will inevitably continue to shrink. The gaps between the LED lamp beads no longer meet the installation conditions of the protective mask. The LED lamp beads are directly exposed, and the protection capability of the display module is seriously reduced. During the production, transportation, installation, and maintenance processes, a large number of display module lamp beads are damaged by bumps and bumps. Repairing without contaminating other lamp beads is extremely difficult.

[0003] Chip on board (COB) involves packaging several bare LED chips onto a substrate, which is then packaged into a COB display device. This COB display device is then assembled into an LED display. While this improves the protective capabilities of the housing, it can lead to damage along the edges of the display device, making repair extremely difficult and potentially rendering the entire display device useless. Furthermore, new drawbacks arise, such as surface glossy reflections, poor base color consistency, and reduced contrast. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical fiber light guide panel and a layered manufacturing method thereof.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A fiber optic light guide panel is provided. A light guide component without circuits and electronic devices is assembled on the light-emitting surface of a display light panel. The light guide component includes a rear panel, a fiber optic array unit, and a front panel. Each pixel at the rear panel end and the front panel end is connected through the fiber optic array unit.

[0007] The improvement of the above technical solution of the present invention is that the size of the front panel is larger than that of the rear panel, and the size of the front panel is larger than that of the display light board.

[0008] An improvement of the above technical solution of the present invention is that a light diffusion structure is provided corresponding to each pixel of the front panel.

[0009] An improvement of the above technical solution of the present invention is that the light diffusion structure includes a concave light cup and a convex lens connected together.

[0010] A layered manufacturing method for an optical fiber light guide panel, wherein the rear panel and the front panel of the light guide component are manufactured by injection molding; the optical fiber array unit of the light guide component is manufactured layer by layer by laying out the optical fiber layers using optical fiber curing equipment and curing them with photosensitive adhesive.

[0011] The improvement of the above technical solution of the present invention is as follows: the layered production steps of the optical fiber array unit are as follows:

[0012] 1) Use a guide to guide M optical fibers into the cable organizer and positioner through the guide to form optical fiber layers with different spacings;

[0013] Cable organizers are divided into big-endian cable organizers and small-endian cable organizers, and positioners are divided into big-endian positioners and small-endian positioners;

[0014] The Z1 axis is connected to the big-end cable organizer, which is connected to the big-end positioner. Similarly, the Z4 axis is connected to the small-end cable organizer, which is connected to the small-end positioner.

[0015] The optical fiber is fed into the large-end cable organizer, large-end positioner, conductor guide, small-end positioner, and small-end cable organizer through the cable guide to form optical fiber layers with different spacings; the cutting device at the cable guide end cuts the optical fiber;

[0016] 2) The Z1 and Z4 mechanisms move downward manually or automatically, moving the large-end locator to the designated position of the Z2 axis mechanism and locking it. The small-end locator is moved to the designated position of the Z5 axis mechanism and locking it. At the same time, the optical fiber layer above the locator is laid on the base. The cutting device cuts the optical fiber between the locator and the cable organizer.

[0017] 3) The Z1-axis and Z4-axis mechanisms reset, the big-end cable organizer on the Z1-axis is separated from the big-end positioner, and the small-end cable organizer on the Z4-axis is separated from the small-end positioner; another set of big-end positioners is assembled on the big-end cable organizer, and another set of small-end positioners is assembled on the small-end cable organizer.

[0018] 4) Through the movement of the X-axis, the optical fiber layer laid on the base is precisely and continuously dispensed and cured in time and segment. After completion, the X-axis is reset; the Z3-axis mechanism is equipped with a large-end precision dispensing valve and a light curing device, and the Z6-axis mechanism is equipped with a small-end precision dispensing valve and a light curing device;

[0019] 5) The optical fiber layer is bonded to the base by curing; the cutting device cuts between the locator and the optical fiber layer bonded to the base, and then removes the locator;

[0020] 6) The Z2 and Z3 axes synchronously move to the specified position of the next optical fiber layer and wait, and the Z5 and Z6 axes synchronously move to the specified position of the next optical fiber layer and wait.

[0021] 7) Make N layers in sequence to form an optical fiber array.

[0022] The improvement of the above technical solution of the present invention is as follows: the completed optical fiber array is installed in a potting mold, resin potting glue is poured in, and after curing at room temperature or high temperature, the mold is demoulded to remove the potted optical fiber array unit;

[0023] Use a milling machine to perform shape positioning processing on the optical fiber array unit, and then use a grinder to polish and flatten the front and back surfaces of the optical fiber array unit;

[0024] Assemble the optical fiber array unit with the front panel and the rear panel;

[0025] Place the front panel horizontally with the front panel facing upward vertically, use a precision dispensing machine to inject epoxy resin into each pixel position, wrap the end of the optical fiber to form a curved light diffusion lens, and cure it at room temperature or high temperature to form a light guide component.

[0026] Due to the adoption of the above technical solution, the technical effects achieved by the present invention are as follows:

[0027] The optical fiber light guide panel of the present invention adopts a high-precision integrated electrical part. This structure reduces the overall size and can be encapsulated in a sealed housing, effectively improving the protection level of the housing and being suitable for more severe application environments.

[0028] The present invention adopts a layered manufacturing method to process the optical fiber array, which can smoothly complete the manufacturing of the optical fiber array, thereby realizing light guidance between the front panel and the rear panel using optical fibers.

[0029] The light guide component of the optical fiber light guide panel in the present invention adopts plastic optical fiber to project the light output by the LED light board onto the front panel of the display module, thereby expanding the pixel spacing, increasing the structural strength, and enhancing the ability to resist collision damage; and it is dustproof, waterproof, anti-condensation, and anti-salt spray corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the light guide component of the present invention Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the light guide component of the present invention Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the device of the present invention Figure 1 ;

[0033] Figure 4 This is a schematic diagram of the device of the present invention Figure 2 ;

[0034] Figure 5 It is a schematic diagram of the cable organizer and positioner of the present invention;

[0035] Among them, 1, Z1 axis, 2, Z2 axis, 3, Z3 axis, 4, Z4 axis, 5, Z5 axis, 6, Z6 axis, 7, cable organizer, 8, positioner, 9, wire guide, 10, front panel, 11, rear panel, 12, X axis. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] The invention discloses an optical fiber light guide panel, which can be applied to LED display screens and LCD display screens. The light guide component of the display screen utilizes optical fibers to guide light and form pixel points.

[0039] The optical fiber light guide panel is equipped with a light guide component without circuits and electronic devices on the light emitting surface of the display light board. The light guide component transmits the light of the pixel point according to the pixel rule, and the light guide component has an optical fiber that can guide light. Figure 1 、 Figure 2 As shown, the light-guiding component includes a rear panel 11, an optical fiber array unit, and a front panel 10; each pixel at the rear panel end and the front panel end are connected through the optical fiber array unit. That is, there are M×N pixels distributed on the rear panel end, and the pixels at the rear panel end are consistent with the pixel spacing of the LED light board. There are also M×N pixels distributed on the front panel. The number of row pixels in the pixel array on the front panel corresponds to the number of row pixels in the pixel array on the rear panel end. The number of column pixels in the pixel array on the front panel corresponds to the number of column pixels in the pixel array on the rear panel end. The rear panel is hollow, and the pixels at the rear panel end are not actually on the rear panel, but pass through the rear panel, so it is called the pixel array at the rear panel end here to indicate its positional relationship. The optical fiber array is mainly an array formed using optical fibers, and is also an M×N array here.

[0040] In a specific implementation, the size of the front panel is usually set to be larger than the size of the rear panel, and the size of the front panel is larger than the size of the display light board.

[0041] Furthermore, a light diffusion structure is provided corresponding to each pixel on the front panel to increase the viewing angle of the LED light panel.

[0042] Specifically, the light diffusion structure includes a concave light cup and a convex lens connected together.

[0043] The present invention also discloses a layered manufacturing method for an optical fiber light guide panel, which is used for manufacturing the optical fiber light guide panel.

[0044] The overall concept of this manufacturing method is to first manufacture the rear and front panels of the light guide component by injection molding. Then, the optical fiber array unit of the light guide component is laid out with optical fiber layers through an optical fiber curing device and cured with photosensitive adhesive, forming the product layer by layer.

[0045] This production method uses optical fiber curing equipment, such as Figure 2 、 Figure 3 、 Figure 4 As shown in the figure, this setup has six vertical working axes: Z1, Z2, Z3, Z4, Z5, and Z6. It also has an X-axis for horizontal movement.

[0046] The steps for layering the fiber array unit using the fiber curing equipment are as follows:

[0047] 1) Use a cable guide to guide M optical fibers into the cable organizer 7 and positioner 8 through the cable guide 9 to form optical fiber layers with different spacing.

[0048] Among them, the cable organizer 7 is divided into a big-end cable organizer and a small-end cable organizer, and the positioner 8 is divided into a big-end positioner and a small-end positioner.

[0049] The Z1 axis of the optical fiber curing equipment is connected to the large-end cable organizer, which is connected to the large-end positioner. Similarly, the Z4 axis is connected to the small-end cable organizer, which is connected to the small-end positioner.

[0050] The optical fiber is fed into the large-end cable organizer, large-end positioner, conductor guide 9, small-end positioner, and small-end cable organizer through the cable guide to form optical fiber layers with different spacings. Finally, the optical fiber at the cable guide end is cut using a cutting device.

[0051] 2) Manually or automatically move the Z1-axis 1 and Z4-axis 4 mechanisms downward, moving the large-end positioner to the designated position of the Z2-axis 2 mechanism and locking it. The small-end positioner is then moved to the designated position of the Z5-axis 5 mechanism and locked. Simultaneously, the fiber layer above the positioner is laid on the base. The cutting device cuts the fiber between the positioner and the cable organizer.

[0052] 3) The Z1 axis 1 and Z4 axis 4 mechanisms reset, the big-end cable organizer on the Z1 axis 1 is separated from the big-end positioner, and the small-end cable organizer on the Z4 axis 4 is separated from the small-end positioner; another set of big-end positioners is assembled on the big-end cable organizer for use in the next production cycle; another set of small-end positioners is assembled on the small-end cable organizer for use in the next production cycle.

[0053] 4) Through the movement of the X-axis, the optical fiber layer laid on the base is precisely dispensed and cured in time and section, and the X-axis is reset after completion. The Z3 axis 3 mechanism is equipped with a large-end precision dispensing valve and light curing device, and the Z6 axis 6 mechanism is equipped with a small-end precision dispensing valve and light curing device.

[0054] 5) The optical fiber layer is bonded to the base by curing; the cutting device cuts between the locator and the optical fiber layer bonded to the base, and then removes the locator.

[0055] 6) The Z2 axis 2 mechanism and the Z3 axis 3 mechanism synchronously move to the next fiber layer specified position and wait, and the Z5 axis 5 mechanism and the Z6 axis 6 mechanism synchronously move to the next fiber layer specified position and wait.

[0056] 7) Make N layers in sequence according to the above method to make an optical fiber array.

[0057] After the fiber array is fabricated, it is installed in a potting mold and filled with resin. After curing at room temperature or elevated temperature, the mold is removed and the potted fiber array unit is removed. At this point, the fiber array unit is a rectangular plate with the optical fibers forming the fiber array inside. Because the surface of the fiber array unit is not smooth, a milling machine is used to position the unit's shape, and then a grinder is used to polish the front and back surfaces.

[0058] After the optical fiber array unit is processed to meet the requirements, it is assembled with the front panel and the rear panel.

[0059] Place the front panel horizontally with the front panel facing upward vertically, use a precision dispensing machine to inject epoxy resin into each pixel position, wrap the end of the optical fiber to form a curved light diffusion lens, and cure it at room temperature or high temperature to form a light guide component.

[0060] The present invention adopts a layered manufacturing method to realize the production of the optical fiber array unit, which can ensure the stable shape of the optical fiber array and ensure the reliable and stable operation of the optical fiber array in the optical fiber light guide panel. The application of the optical fiber array makes the processing and production of the optical fiber light guide panel easy to implement.

[0061] The present invention designs a light-guiding component with an optical fiber array and designs a layered manufacturing method to realize the production of optical fiber array units, thereby expanding the pixel pitch of the display module, increasing the structural strength, and enhancing the ability to resist collision damage; and has the advantages of dustproof, waterproof, anti-condensation, and anti-salt spray corrosion.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A layered manufacturing method for an optical fiber light guide panel, characterized in that: A light-guiding component without circuits and electronic devices is assembled on the light-emitting surface of the display light board; the light-guiding component includes a rear panel, an optical fiber array unit and a front panel; each pixel of the rear panel and the front panel is connected through the optical fiber array unit; The rear panel and the front panel of the light guide component are made by injection molding; the optical fiber array unit of the light guide component is formed layer by layer by laying out the optical fiber layer through an optical fiber curing device and curing it with photosensitive adhesive; The steps for layering the fiber array unit are as follows: 1) Use a guide to introduce M optical fibers into the cable organizer and positioner through the guide to form optical fiber layers with different spacings; Cable organizers are divided into big-endian cable organizers and small-endian cable organizers, and positioners are divided into big-endian positioners and small-endian positioners; The Z1 axis is connected to the big-end cable organizer, which is connected to the big-end positioner. Similarly, the Z4 axis is connected to the small-end cable organizer, which is connected to the small-end positioner. The optical fiber is fed into the large-end cable organizer, large-end positioner, conductor guide, small-end positioner, and small-end cable organizer through the cable guide to form optical fiber layers with different spacings; the cutting device at the cable guide end cuts the optical fiber; 2) The Z1 and Z4 mechanisms move downward manually or automatically, send the large-end positioner to the specified position of the Z2 axis mechanism and lock the large-end positioner, send the small-end positioner to the specified position of the Z5 axis mechanism and lock the small-end positioner, and at the same time, the optical fiber layer above the positioner is laid on the base; the cutting device cuts the optical fiber between the positioner and the cable organizer; 3) The Z1-axis and Z4-axis mechanisms reset, the large-end cable organizer on the Z1-axis is separated from the large-end positioner, and the small-end cable organizer on the Z4-axis is separated from the small-end positioner; another set of large-end positioners is installed on the large-end cable organizer, and another set of small-end positioners is installed on the small-end cable organizer; 4) Through the movement of the X-axis, the optical fiber layer arranged on the base is precisely and continuously dispensed and cured in time and segment, and the X-axis is reset after completion; the Z3 axis mechanism is equipped with a large-end precision dispensing valve and a light curing device, and the Z6 axis mechanism is equipped with a small-end precision dispensing valve and a light curing device; 5) The optical fiber layer is bonded to the base by curing; the cutting device cuts between the positioner and the optical fiber layer bonded to the base, and then removes the positioner; 6) Z2 and Z3 axes synchronously move to the next fiber layer specified position and wait, and Z5 and Z6 axis mechanisms synchronously move to the next fiber layer specified position and wait; 7) Make N layers in sequence to form an optical fiber array.

2. The optical fiber light guide panel according to claim 1, characterized in that: The size of the front panel is larger than that of the rear panel, and the size of the front panel is larger than that of the display light panel.

3. The optical fiber light guide panel according to claim 1, characterized in that: A light diffusion structure is correspondingly arranged for each pixel of the front panel.

4. The optical fiber light guide panel according to claim 3, characterized in that: The light diffusion structure includes a concave light cup and a convex lens that are butt-jointed together.

5. The layered manufacturing method of the optical fiber light guide panel according to claim 1, characterized in that: Install the fabricated optical fiber array into a potting mold, pour in resin potting glue, and after curing at room temperature or high temperature, demould and take out the potted optical fiber array unit; The fiber array unit is processed for shape positioning by a milling machine, and then the front and back surfaces of the fiber array unit are polished and flattened by a grinder; Assemble the optical fiber array unit with the front panel and the rear panel; Place the front panel horizontally with its face facing upward vertically, use a precision glue dispenser to inject epoxy resin into each pixel position, wrap the end of the optical fiber to form a curved light diffusion lens, and cure it at room or high temperature to form a light-guiding component.

Images