CN112908983A

CN112908983A - Production process of LED transparent screen

Info

Publication number: CN112908983A
Application number: CN202110062558.2A
Authority: CN
Inventors: 何立宝; 林富; 李淑玲
Original assignee: Shenzhen Jinghong Technology Co ltd
Current assignee: Shenzhen Jinghong Technology Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-06-04

Abstract

The application relates to a production process of an LED transparent screen, relating to the field of display screens, and comprising the following steps of S1: taking a transparent sandwich plate, and sticking a conducting circuit on the sandwich plate; step S2: coating solder paste on the position of the LED lamp bead to be welded on the conducting circuit, and mounting the pin of the LED lamp bead on the solder paste; step S3: melting tin paste by adopting a laser welding method, wherein the welding temperature is less than 200 ℃, and tin is electrically connected between pins of the LED lamp beads and the conductive circuit; step S4: and arranging transparent jelly on the sandwich plate, taking a transparent outer plate, and installing the outer plate on the surface of the sandwich plate where the LED lamp beads are located. By adopting the solder paste and laser welding, the temperature of the laser welding is far lower than that of electric welding, glass is not easy to soften during welding, and the glass is not easy to damage; the temperature of the pins is easy to rise by irradiating laser on the pins of the LED lamp beads, and the heat of the pins melts the solder paste, so that the solder paste can be reliably melted and attached to the outside of the pins of the LED lamp beads; the reliability of LED lamp bead, conducting wire electricity connection is high.

Description

Production process of LED transparent screen

Technical Field

The application relates to the field of display screens, in particular to a production process of an LED transparent screen.

Background

The LED transparent screen is a transparent display screen capable of displaying patterns, characters and animations, has good light transmittance and can be used as light-transmitting glass.

The LED transparent screen comprises two outer plates and a sandwich plate arranged between the two outer plates, the outer plates and the sandwich plate are made of transparent glass, copper wire-shaped conducting circuits are adhered to the sandwich plate, then the LED lamp beads are installed on the conducting circuits, and the pins and the conducting circuits are electrically connected and fixed in a mode of electric welding.

In the related art, the inventors believe that the glass is easily softened and damaged by the electric welding at a high temperature (500 ℃ or higher).

Disclosure of Invention

In order to prevent the glass from being damaged due to overhigh temperature during welding, the application provides a production process of the LED transparent screen.

The application provides a production technology of an LED transparent screen, which adopts the following technical scheme:

a production process of an LED transparent screen is characterized in that: the method comprises the following steps:

step S1: taking a transparent sandwich plate, and installing a conducting circuit on the sandwich plate;

step S2: coating solder paste on the position of the LED lamp bead to be welded on the conducting circuit, and mounting the pin of the LED lamp bead on the solder paste;

step S3: melting tin paste by adopting a laser welding method, wherein the welding temperature is less than 200 ℃, and tin is electrically connected between pins of the LED lamp beads and the conductive circuit;

step S4: and (4) taking a transparent outer plate, and installing the outer plate on the surface of the sandwich plate where the LED lamp beads are located.

By adopting the technical scheme, the production process of the LED transparent screen can be used for irradiating and welding the place needing to be welded in a targeted manner by adopting the solder paste and the laser welding, and is more convenient compared with electric welding. LED lamp pearl can give out light after the conducting wire circular telegram, and the planking provides the protection for LED lamp pearl and conducting wire to make the surface of transparent screen level and smooth. Because the temperature of laser welding is far lower than that of electric welding, glass is not easy to soften during welding, the glass is not easy to damage, and the welding quality is ensured simultaneously.

Optionally, in the step S3, the laser is irradiated onto the pins of the LED lamp beads, and the solder paste is melted by the temperature rise of the pins.

Through adopting above-mentioned technical scheme, the pin material of LED lamp pearl is the metal, and the temperature itself risees easily, and the temperature of pin risees the back, because pin direct contact tin cream, the heat of pin makes the tin cream melt, ensures that the tin cream can be reliably melted and attached to outside the pin of LED lamp pearl.

Optionally, before the outer plate is installed in step S4, a transparent jelly is disposed on the surface of the sandwich plate where the LED beads are located; when the outer plate is installed, the outer plate is pressed on the transparent jelly in a pressing mode, and the transparent jelly is wrapped outside the LED lamp beads.

Through adopting above-mentioned technical scheme, transparent jelly wraps up outside LED lamp pearl, prevents that LED lamp pearl from being crushed by the planking, and transparent jelly establishes between sandwich panel, planking and is connected, makes the structure firm.

Optionally, the transparent jelly is made of PVB or ionic film SGP.

By adopting the technical scheme, the transparent jelly made of the PVB material has elasticity and low cost; the ionic film SGP has better shearing resistance and tearing strength than PVB, and can reliably limit relative sliding between the outer plate and the interlayer when being used as a transparent jelly.

Optionally, the interlayer plate is a glass plate, and in step S1, an installation groove for embedding the conductive circuit is etched on the interlayer plate with hydrofluoric acid, the interlayer plate is cleaned, and the installation groove is coated with glue and adhered with the conductive circuit.

By adopting the technical scheme, the hydrofluoric acid can dissolve the glass, and compared with the mounting groove formed by polishing, the glass is not easy to crack; the mounting groove limits the conducting circuit and the solder paste between the conducting circuit and the solder paste, prevents the conducting circuit from separating from the mounting position, and prevents the solder from being stained on the outer plate surface of the sandwich plate.

Optionally, the groove type of the mounting groove is a V-shape, and when hydrofluoric acid is used for etching, a knife is used for obliquely cutting into two V-shaped groove walls of the mounting groove to form the mounting groove.

Through adopting above-mentioned technical scheme, the mounting groove of V-arrangement can play better location effect to the conducting wire, even the width of conducting wire is not unified, places in the mounting groove when the conducting wire after, and the mounting groove passes through two cell walls of V-arrangement butt conducting wire respectively, makes the conducting wire be located the middle part of mounting groove just. The sword is used for the shaping of supplementary mounting groove, and glass easily cutter cutting after hydrofluoric acid dissolves.

Optionally, after the welding in step S3 is completed, a transparent block is taken and installed in the installation groove, the transparent block is provided with an embedded groove for avoiding the conductive circuit, the transparent block is tightly attached to the bottom of the installation groove, a V-shaped groove is formed in a wall surface of the transparent block departing from the embedded groove, the length direction of the V-shaped groove is the same as that of the installation groove, and the V-shaped bottom of the V-shaped groove faces the conductive circuit; the transparent block has a density greater than the transparent gel.

Through adopting above-mentioned technical scheme, through setting up transparent piece, V-arrangement groove, outside light passes transparent jelly and shines to penetrate transparent piece behind the cell wall in V-arrangement groove, and light produces the refraction in the cell wall department in V-arrangement groove, makes light deflect to the direction of keeping away from the conducting wire, then light wears out transparent piece, and light passes the sandwich panel again and gets into indoorly. Through the refraction effect of light, the conducting circuit is difficult for blockking outdoor direct light, makes indoor difficult observation conducting circuit, has played the effect of hiding the conducting circuit in the vision, improves indoor user's use and experiences.

Optionally, the conductive circuit is a strip-shaped copper sheet, and the conductive circuit is bent along a midline to form a V-shaped cross section; in the step S1, the conductive trace is tightly attached to the two V-shaped groove walls of the mounting groove through the sheet surface.

By adopting the technical scheme, on the basis that the thickness of the flaky V-shaped conducting circuit can be thinner, the rigidity of the conducting circuit (similar to angle steel in principle) is improved due to the existence of the bent part, the conducting circuit is easy to keep a straight state, and the conducting circuit is convenient to transport and mount.

Optionally, the anode of the LED lamp bead includes two positive pins, and the cathode of the LED lamp bead includes two negative pins; in the step S2, the two positive pins are respectively abutted against the two V-shaped groove walls of the mounting groove, and the two negative pins are respectively abutted against the two V-shaped groove walls of the mounting groove.

By adopting the technical scheme, the LED lamp beads can emit light after any positive pin and negative pin are connected into the live circuit, and the LED lamp beads can be ensured to be electrified and emit light when the welding quality of one positive pin or one negative pin is poor. When installing LED lamp pearl, the personnel can press LED lamp pearl to the sandwich panel direction, and the pin is crooked along the V-arrangement groove wall self-adaptation of mounting groove, makes the cell wall of its tip reliable contact mounting groove, makes the electricity connect reliably.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the temperature of laser welding is far lower than that of electric welding, glass is not easy to soften during welding, and the glass is not easy to damage;

2, the reliability of the electric connection of the LED lamp bead and the conducting circuit is high;

3. the effect of hiding the conducting circuit in the vision can be played, and the use experience of indoor users is improved.

Drawings

Fig. 1 is an overall exploded view of an LED transparent screen according to an embodiment of the present application.

Fig. 2 is a partial exploded view of the LED transparent screen of the embodiment.

FIG. 3 is a schematic connection diagram of an LED lamp bead and a conductive circuit of the embodiment.

Fig. 4 is a sectional view of the LED transparent screen of the embodiment, mainly highlighting the structure of the transparent block.

Fig. 5 is a schematic optical path diagram of the LED transparent screen of the embodiment in use.

Description of reference numerals: 1. a sandwich panel; 11. mounting grooves; 2. a conductive circuit; 3. LED lamp beads; 31. a positive pin; 32. a negative pin; 21. tin paste; 4. a transparent block; 41. caulking grooves; 42. a V-shaped groove; 5. a transparent jelly; 6. and (7) an outer plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a production process of an LED transparent screen. The production process of the LED transparent screen comprises the following steps:

step S1: referring to fig. 1 and 2, a sandwich panel 1 is taken, the sandwich panel 1 being a transparent glass panel. Placing sandwich panel 1 level, etching out mounting groove 11 that supplies conducting wire 2 to imbed at sandwich panel 1's last face with hydrofluoric acid, mounting groove 11 is the straight flute, and the both ends of mounting groove 11 all link up to sandwich panel 1's lateral wall, and the cell type of mounting groove 11 is the V-arrangement. When hydrofluoric acid is used for etching, a cutter is used for obliquely cutting into the mounting groove 11 to form two V-shaped groove walls of the mounting groove 11, the cutter is a rotating milling cutter, the mounting groove 11 is machined on a machine tool, and after glass is dissolved on the surface of the sandwich plate 1 by the hydrofluoric acid, the cutter moves linearly to assist in forming the two V-shaped groove walls of the mounting groove 11. And cleaning the sandwich plate 1, washing away residual hydrofluoric acid and debris, and polishing the mounting groove 11 until the wall of the mounting groove is flat and transparent.

Referring to fig. 2 and 3, a conductive circuit 2 is taken, the conductive circuit 2 is a strip-shaped copper sheet, the conductive circuit 2 is bent along a center line to make the cross section of the conductive circuit be V-shaped, and the V-shaped angle of the conductive circuit is the same as that of the mounting groove 11; the width of both ends of conducting wire 2 is broad, and this department is used for connecting LED lamp pearl 3. When the conducting circuit 2 is installed, UV glue is coated in the installation groove 11, the conducting circuit 2 is pasted, the conducting circuit 2 is tightly attached to two V-shaped groove walls of the installation groove 11 through a sheet surface, and the middle part of the conducting circuit 2 does not completely occupy the groove walls of the installation groove 11. A plurality of conducting circuits 2 are arranged in the mounting groove 11 along the length direction of the mounting groove, a distance is reserved between the end parts of the adjacent conducting circuits 2, and the distance is used for mounting the LED lamp beads 3.

Step S2: referring to fig. 2 and 3, the LED lamp bead 3 is taken, the anode of the LED lamp bead 3 includes two positive pins 31, and the cathode of the LED lamp bead 3 includes two negative pins 32. Two positive pins 31 are connected through metal conduction, two negative pins 32 are also connected through metal conduction, and LED lamp bead 3 can all give out light after arbitrary positive pin 31, negative pin 32 access live circuit.

And (3) coating solder paste 21 on the positions of the LED lamp beads 3 to be welded on the conductive circuits 2. Solder paste 21 is a solder material, and solder paste 21 is applied specifically to the proximal end portion surface of conductive trace 2. Then install LED lamp pearl 3's pin on tin cream 21: the LED lamp beads 3 are positioned between the end parts of the adjacent conducting circuits 2, wherein two positive pins 31 are inserted into the same solder paste 21 of one conducting circuit 2, and two negative pins 32 are inserted into the same solder paste 21 of the adjacent conducting circuit 2; the ends of the two positive pins 31 are respectively abutted against the two V-shaped groove walls of the mounting groove 11 of one conductive circuit 2, and the ends of the two negative pins 32 are respectively abutted against the two V-shaped groove walls of the mounting groove 11 of the adjacent conductive circuit 2. After the installation of LED lamp pearl 3 is accomplished, the bottom surface of LED lamp pearl 3 and the face butt of sandwich panel 1, the pin self-adaptation is crooked makes the cell wall of its tip reliable contact mounting groove 11, and LED lamp pearl 3 establishes the electricity between adjacent conducting wire 2 and connects.

Step S3: the solder paste 21 is melted by laser welding, which is also called photosolder method, and the temperature is controlled to be more than 180 ℃ and less than 200 ℃ during welding. During the optical welding, the mounting groove 11 provides a space for a laser path, the laser is irradiated on the pins of the LED lamp beads 3, the solder paste 21 is melted through the temperature rise of the pins, and after the solder paste 21 is melted, the tin is electrically connected between the pins of the LED lamp beads 3 and the conductive circuits 2; the mounting groove 11 limits tin therebetween, prevents that tin from being stained with on the outer face of sandwich panel 1, and tin becomes the solid after the cooling.

Referring to fig. 2 and 4, the transparent block 4 is mounted in the mounting groove 11. Transparent piece 4 is the clear glass piece, and transparent piece 4 is rectangular shape, and its length direction is followed the length direction of mounting groove 11, and transparent piece 4 has a plurality ofly, and transparent piece 4's length slightly is less than the length of conducting wire 2, and transparent piece 4 is located between adjacent LED lamp pearl 3. Transparent piece 4 is V-arrangement towards the lateral wall of mounting groove 11, and transparent piece 4 hugs closely the cell wall of mounting groove 11, and transparent piece 4 offsets through the form of face contact with the cell wall of mounting groove 11, fixes through scribbling transparent glue between transparent piece 4 and mounting groove 11. The transparent block 4 is provided with an embedded groove 41 avoiding the conductive circuit 2, a V-shaped groove 42 is formed in the wall surface of the transparent block 4 departing from the embedded groove 41, the length direction of the V-shaped groove 42 is the same as that of the mounting groove 11, and the V-shaped bottom of the V-shaped groove 42 is opposite to the conductive circuit 2.

Step S4: referring to fig. 1 and 4, a transparent jelly 5 is disposed on the surface of the sandwich panel 1 where the LED lamp beads 3 are located. The transparent jelly 5 is made of PVB or ionic film SGP, and the density of the transparent jelly 5 is less than that of the transparent block 4. Transparent jelly 5 wraps up outside LED lamp pearl 3 and transparent piece 4, and transparent jelly 5 also sets up in the reverse side of sandwich panel 1.

Two transparent outer plates 6 are taken, the outer plates 6 are transparent glass plates, and the two outer plates 6 are respectively arranged on two sides of the surface of the sandwich plate 1. If the transparent jelly 5 is PVB, the PVB is pressed and fixed with the outer plate 6 and the sandwich plate 1 in a pressurizing mode; when the transparent jelly 5 is an ionic gel sheet SGP, the SGP is softened by heating and pressurizing, and is filled between the outer plate 6 and the interlayer plate 1 to be fixed.

And after the transparent jelly 5 is cooled and solidified, the production of the LED transparent screen is finished.

In conclusion, the production process of the LED transparent screen adopts the solder paste 21 and the laser welding, can be used for irradiating and welding the place needing to be welded in a targeted manner, and is more convenient compared with electric welding. Because the temperature of laser welding is far lower than that of electric welding, glass is not easy to soften during welding, the glass is not easy to damage, and the welding quality is ensured simultaneously.

The transparent screen of LED is installed in the building back, and LED lamp pearl 3 is outdoor. Referring to fig. 5, by arranging the V-shaped groove 42, external light penetrates through the transparent jelly 5 and penetrates into the transparent block 4 after irradiating to the groove wall of the V-shaped groove 42, the light is refracted at the groove wall of the V-shaped groove 42, so that the light deflects towards the direction far away from the conductive circuit 2, then the light penetrates out of the transparent block 4, and the light sequentially penetrates through the sandwich plate 1 and the outer plate 6 and then enters the room. Through the refraction effect of light, conducting wire 2 is difficult for blockking outdoor direct light that comes, makes indoor difficult observation conducting wire 2, has played the effect of hiding conducting wire 2 in the vision, improves indoor user's use and experiences.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A production process of an LED transparent screen is characterized in that: the method comprises the following steps:

step S1: taking a transparent sandwich plate (1), and installing a conductive circuit (2) on the sandwich plate (1);

step S2: coating solder paste (21) on the positions of the LED lamp beads (3) to be welded on the conductive circuits (2), and mounting pins of the LED lamp beads (3) on the solder paste (21);

step S3: melting the tin paste (21) by adopting a laser welding method, wherein the welding temperature is less than 200 ℃, and tin is electrically connected between the pins of the LED lamp beads (3) and the conductive circuits (2);

step S4: and taking a transparent outer plate (6), and installing the outer plate (6) on the surface of the sandwich plate (1) where the LED lamp beads (3) are located.

2. The production process of the LED transparent screen according to claim 1, characterized in that: and in the step S3, laser is irradiated on the pins of the LED lamp beads (3), and the solder paste (21) is melted through the temperature rise of the pins.

3. The production process of the LED transparent screen according to claim 1, characterized in that: before the outer plate (6) is installed in the step S4, transparent jelly (5) is arranged on the surface of the sandwich plate (1) where the LED lamp beads (3) are located; when installing planking (6), press planking (6) on transparent jelly (5) through the mode of pressfitting, transparent jelly (5) parcel is outside LED lamp pearl (3).

4. The production process of the LED transparent screen according to claim 3, characterized in that: the transparent jelly (5) is made of PVB or ionic film SGP.

5. The production process of the LED transparent screen according to claim 3, characterized in that: the sandwich plate (1) is a glass plate, in the step S1, a mounting groove (11) for embedding the conducting circuit (2) is etched on the sandwich plate (1) by hydrofluoric acid, then the sandwich plate (1) is cleaned, and then the conducting circuit (2) is glued and pasted in the mounting groove (11).

6. The production process of the LED transparent screen according to claim 5, characterized in that: the groove shape of the mounting groove (11) is V-shaped, and when hydrofluoric acid is used for etching, a knife is used for obliquely cutting into the mounting groove (11) to form two V-shaped groove walls of the mounting groove (11).

7. The production process of the LED transparent screen according to claim 6, characterized in that: after the welding in the step S3 is completed, a transparent block (4) is taken and installed in the installation groove (11), the transparent block (4) is provided with an embedded groove (41) avoiding the conducting circuit (2), the transparent block (4) is tightly attached to the bottom of the installation groove (11), a V-shaped groove (42) is formed in the wall surface of the transparent block (4) departing from the embedded groove (41), the length direction of the V-shaped groove (42) is the same as that of the installation groove (11), and the V-shaped bottom of the V-shaped groove (42) is opposite to the conducting circuit (2); the density of the transparent block (4) is greater than that of the transparent jelly (5).

8. The production process of the LED transparent screen according to claim 6, characterized in that: the conductive circuit (2) is a strip-shaped copper sheet, and the conductive circuit (2) is bent along a midline to enable the section to be V-shaped; in the step S1, the conductive trace (2) is tightly attached to the two V-shaped groove walls of the mounting groove (11) through one surface.

9. The production process of the LED transparent screen according to claim 8, characterized in that: the anode of the LED lamp bead (3) comprises two positive pins (31), and the cathode of the LED lamp bead (3) comprises two negative pins (32); in the step S2, the two positive pins (31) are respectively abutted against the two V-shaped groove walls of the mounting groove (11), and the two negative pins (32) are respectively abutted against the two V-shaped groove walls of the mounting groove (11).