A method for manufacturing a five-side light-emitting lens-free direct-lit glass backlight panel

Abstract

The application discloses a manufacturing method of a five-surface light-emitting lens-free direct type glass backlight plate; the manufacturing method comprises the following specific steps in sequence: S1, performing hole opening on a glass substrate to form a plurality of first light-emitting holes with the width of the upper part being larger than that of the lower part on the glass substrate; S2, printing high-temperature-resistant reflective ink on the whole surface of the glass substrate, and then high-temperature heating to the softening temperature of the glass substrate; in the high-temperature heating process, the high-temperature-resistant reflective ink diffuses into the matrix of the glass substrate to form a high-temperature-resistant reflective layer; in the high-temperature heating process, the first light-emitting holes form second light-emitting holes with the width of the upper part being larger than that of the lower part and smooth wall surface; S3, attaching the glass reflective plate to the glass bottom plate, and the glass bottom plate is close to the narrow part of the second light-emitting hole; S4, electrically connecting light-emitting elements in the second light-emitting hole, so that the five-surface light-emitting lens-free direct type glass backlight plate is obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a manufacturing method of a five-side light-emitting lens-free direct type glass backlight panel. BACKGROUND

[0002] Common direct type light-emitting panels include ordinary LED light-emitting panels, Mini LED light-emitting panels, OLED and Micro LED light-emitting panels, etc. The ordinary direct type LED light-emitting panel has a large light mixing distance, and the lamp beads need to be matched with lenses to achieve the effect of diffusing the lamp shadow. The Mini LED light-emitting panel pursues the requirements of ultra-thin display, high brightness and high color gamut, and the number of Mini LED lamp beads is large and the size of the lamp beads is small, which is not suitable for matching with lenses. The OLED and Micro LED light-emitting panel technologies are not mature.

[0003] With the rapid development of display technology, high-brightness display is more and more favored by the market. The brightness of the conventional LED display is basically below 500 nit, and the Mini LED display can reach more than 1000 nit. To increase the brightness of the conventional LED display, the number of lamp beads and matched lenses needs to be increased, resulting in an increase in manufacturing cost. In the case that the Mini LED lamp beads are not matched with filters, the lamp shadow can only be avoided by increasing the light mixing distance or the shielding property of the diffusion plate. Increasing the light mixing distance will increase the thickness of the display, and increasing the shielding property of the diffusion plate will sacrifice part of the brightness. SUMMARY

[0004] The present application provides a manufacturing method of a five-side light-emitting lens-free direct type glass backlight panel. The glass backlight panel manufactured by the method is perforated at a specific position of the glass, and high-temperature resistant reflective ink is applied on the glass substrate of the perforation. The perforation and the reflective ink achieve a diffusing effect similar to that of a lens. At the same time, the reflective effect of the reflective ink on the hole wall allows the LED lamp beads to be set as five-side light-emitting units, greatly improving the light-emitting efficiency of a single light-emitting element (LED lamp bead). Under the premise that the number of LED lamp beads remains unchanged, the brightness of the glass backlight panel is effectively improved, and the cost of the lens is saved. In addition, compared with the backlight panel made of a reflective sheet matched with a plastic substrate, the reflective layer of the backlight panel formed by applying the reflective ink is more firm and less likely to deform or fall off.

[0005] The present application is implemented by the following technical solutions:

[0006] A manufacturing method of a five-side light-emitting lens-free glass backlight panel, characterized in that the manufacturing method comprises the following steps:

[0007] S1, perforating a glass substrate to form a plurality of first light-emitting holes with a wide upper diameter and a narrow lower diameter on the glass substrate;

[0008] S2, printing high-temperature resistant reflective ink on the whole surface of the glass substrate, and then heating to the softening temperature of the glass substrate; during the high-temperature heating process, the high-temperature resistant reflective ink diffuses into the matrix of the glass substrate to form a high-temperature resistant reflective layer; during the high-temperature heating process, the first light-emitting hole naturally forms a second light-emitting hole with a wide upper part and a narrow lower part and a smooth wall surface;

[0009] Specifically, the high-temperature resistant reflective ink at the first light-emitting hole is initially accumulated at the hole edge; the ink is a low-viscosity ink with good fluidity, and flows to cover the hole wall due to gravity, forming a hole with the inner wall covered with reflective ink; at the same time, during the process of softening and then hardening of the glass, the light-emitting hole naturally forms a smooth curved surface structure (i.e. the second light-emitting hole) due to the tension effect;

[0010] S3, the glass reflective plate is attached to the glass bottom plate, and the glass bottom plate is close to the narrow part of the second light-emitting hole; specifically, after the glass reflective plate and the glass bottom plate are attached, the glass bottom plate is attached to the lower part (narrow part) of the second light-emitting hole;

[0011] S4, electrically connecting the light-emitting element in the second light-emitting hole, i.e. obtaining a five-surface light-emitting lens-free direct type glass backlight plate.

[0012] Specifically, the manufacturing method of the five-surface light-emitting lens-free direct type glass backlight plate provided by the application has a simple manufacturing process; during the manufacturing process, the high-temperature resistant reflective ink is diffused and penetrated into the matrix of the glass substrate by using the high-temperature softening glass process, forming a high-temperature resistant reflective layer on the surface of the glass matrix, which has a coating reflective layer effect; since the high-temperature resistant reflective layer is penetrated into the glass matrix, delamination does not occur, effectively solving the delamination problem of the coating reflective layer on the surface of the glass substrate.

[0013] Specifically, a manufacturing method of a five-surface light-emitting lens-free direct type glass backlight plate: the glass substrate can be cut to a specified size by a CNC cutting process according to needs, and the cut glass substrate is edge polished and cleaned for use.

[0014] Further, a manufacturing method of a five-surface light-emitting lens-free direct type glass backlight plate: step S1, laser drilling the glass substrate to form a plurality of first light-emitting holes which are uniformly distributed and have a wide upper part and a narrow lower part.

[0015] Further, a manufacturing method of the five-side light-emitting lens-free direct type glass backlight panel: step S2, printing high-temperature-resistant reflective ink on the glass substrate, and then heating to the softening temperature of the glass substrate; the high-temperature-resistant reflective ink penetrates into the matrix of the glass substrate to form a high-temperature-resistant reflective layer during the high-temperature heating process; wherein: the heating temperature is 900-1000℃, and the high-temperature-resistant reflective ink can resist high temperature of 1200-1600℃. Specifically, the high-temperature-resistant reflective ink used can resist high temperature of 1200-1600℃.

[0016] Further, a manufacturing method of the five-side light-emitting lens-free direct type glass backlight panel: the reflectivity of the high-temperature-resistant reflective layer in step S2 is >95%.

[0017] Further, a manufacturing method of the five-side light-emitting lens-free direct type glass backlight panel: the thickness of the high-temperature-resistant reflective layer in step S2 is 40±5μm.

[0018] The beneficial effects of the present application are:

[0019] (1) The manufacturing method of the five-side light-emitting lens-free direct type glass backlight panel provided by the present application has simple manufacturing process and low manufacturing cost.

[0020] (2) The manufacturing method of the five-side light-emitting lens-free direct type glass backlight panel provided by the present application, in the manufacturing process, laser drilling is performed at a specific position of the glass substrate, high-temperature-resistant reflective ink is coated on the glass substrate after drilling, the high-temperature-resistant reflective ink will initially accumulate at the edge of the hole, and then flow and cover the hole wall under the action of gravity, forming a light-emitting hole with reflective ink covering the inner wall. At the same time, the glass substrate is softened at high temperature, the high-temperature-resistant reflective ink is diffused and penetrated into the matrix of the glass substrate through high-temperature softening, and a high-temperature-resistant reflective layer similar to the effect of coating a reflective layer is formed on the wall of the light-emitting hole. Since the high-temperature-resistant reflective layer is penetrated into the glass matrix, delamination does not occur. By drilling and coating reflective ink and high-temperature diffusion, a lens-like diffusion effect is achieved. After the glass is softened and then hardened, the light-emitting hole will form a smooth arc structure due to the tension effect. At the same time, the reflective ink on the hole wall can be used to set up a five-side light-emitting unit of LED lamp beads (light-emitting elements), which greatly improves the light-emitting efficiency of a single LED lamp bead. Under the premise that the number of LED lamp beads remains unchanged, the brightness of the light-emitting panel is effectively improved, and the cost of the lens is saved. In addition, compared with the backlight panel made of reflective sheet matched with plastic substrate, the reflective layer formed by coating reflective ink is more firm and less likely to deform or fall off. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative efforts based on the embodiments in the present application are within the scope of protection of the present application.

[0022] Figure 1 A plan view of the first light emitting hole formed in the manufacturing process of the five-side light emitting lens-free direct type glass backlight plate of the present application, Figure 1 Only a partial view is shown.

[0023] Figure 2 A sectional view of the first light emitting hole formed in the manufacturing process of the five-side light emitting lens-free direct type glass backlight plate of the present application; Figure 2 A sectional view of the first light emitting hole formed in the manufacturing process of the five-side light emitting lens-free direct type glass backlight plate of the present application; Figure 1 A sectional view in the direction of A-A.

[0024] Figure 3 A sectional view of the glass reflecting plate in the five-side light emitting lens-free direct type glass backlight plate manufactured by the present application;

[0025] Figure 4 A sectional view of the five-side light emitting lens-free direct type glass backlight plate manufactured by the present application.

[0026] Markings in the figure: 1 glass substrate, 2 high-temperature resistant reflecting layer, 3 glass reflecting plate, 4 light emitting element, 5 glass bottom plate, 1-1 first light emitting hole, 1-2 second light emitting hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts are within the scope of protection of the present application.

[0028] In the description of the present application, it needs to be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate the orientation or positional relationship, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more features. Moreover, the terms "first", "second" and the like are used to distinguish similar objects, and do not necessarily be used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0029] Embodiment 1

[0030] A manufacturing method of a five-surface light-emitting lens-free direct type glass backlight panel, characterized in that the manufacturing method comprises the following steps in sequence:

[0031] S1, providing a glass substrate 1;

[0032] S2, cutting the above-mentioned glass substrate 1 into a specified size according to needs by a CNC cutting process, then edge grinding the cut glass substrate 1, cleaning and waiting for use;

[0033] S3, laser drilling the obtained glass substrate 1, and rough machining a plurality of first light-emitting holes 1-1 (as shown in Figures 1-2 ) uniformly distributed and wide at the top and narrow at the bottom on the glass substrate 1;

[0034] S4, printing high-temperature resistant reflective ink on the entire surface of the glass substrate, and then heating to the softening temperature (about 900-1000℃) of the glass substrate; during the high-temperature heating process, the high-temperature resistant reflective ink diffuses into the matrix of the glass substrate 1 to form a high-temperature resistant reflective layer 2 (the reflectivity of the high-temperature resistant reflective layer 2 is > 95%, the thickness is 40±5μm, and the high-temperature resistant reflective ink at the first light-emitting hole will initially accumulate at the hole edge, the ink is a low-viscosity ink with good flowability, and will flow and cover the hole wall due to gravity, forming a hole with reflective ink covering the inner wall); during the high-temperature heating process, the first light-emitting hole 1-1 will naturally form a second light-emitting hole 1-2 which is wide at the top and narrow at the bottom and has a smooth wall surface (specifically: during the process of glass softening and then hardening, the first light-emitting hole 1-1 will naturally form a smooth curved surface structure due to tension, and the structure is as shown in Figure 3The high-temperature-resistant reflective layer 2 formed in this way is not prone to delamination and can effectively avoid delamination of the reflective layer formed by coating a reflective material; wherein the high-temperature-resistant reflective ink for screen printing can withstand a high temperature of 1200-1600 DEG C; the product obtained after the step S4 of glass softening and re-solidification is the glass reflective plate 3;

[0035] S5, the obtained glass reflective plate 3 is attached to a glass bottom plate 5, and the glass bottom plate 5 is attached to the bottom of the second light-emitting hole 1-2;

[0036] S6, then the light-emitting element 4 is electrically connected in the second light-emitting hole 1-2, that is, a lens-free direct type glass backlight plate with five light-emitting surfaces is obtained, and a structural diagram thereof is as shown in Figure 4 .

[0037] The preparation method of the glass substrate 1 described in the above embodiment 1 comprises the following steps:

[0038] (1) the raw materials required for the above glass substrate 1 are uniformly mixed and melted at 1600-1800 DEG C to form a glass liquid;

[0039] (2) the obtained glass liquid is transferred into a forming pool for cooling, so that the glass liquid has a viscosity suitable for calendering forming, then a double-roller mechanism with an upper structure and a lower structure is used for calendering forming, and then annealing is performed to obtain the glass substrate 1.

[0040] The direct type glass backlight plate manufactured by the present application does not need to be subjected to a fine machining hole process in the manufacturing process, so that the production cost can be effectively reduced; at the same time, the direct type glass backlight plate manufactured by the present application will not have a delamination of the reflective layer, and can be used for a long time. The direct type glass backlight plate manufactured by the present application has a smooth transition arc surface structure of the formed second light-emitting hole, which can provide a reflection effect of light rays of the light-emitting element in multiple directions, the reflective layer of the hole wall can effectively reflect the light rays emitted from the four sides of the LED to the light-emitting surface of the diffusion plate, and the reflected light rays are diffuse reflection light, which effectively plays the role of light diffusion as the lens.

[0041] The direct type glass backlight plate manufactured by the present application can maximize the utilization of light rays of the light-emitting element, greatly improve the light utilization rate, and make the light-emitting effect of the glass backlight plate better, so that the light spots are uniform without using a lens.

[0042] The above is only used for explaining the present application, and does not limit the present application. Any obvious changes or variations derived from the technical solutions of the present application are still within the protection scope of the present application.

Claims

1. A method of manufacturing a five-side light-emitting lens-free direct-lit glass backlight panel, characterized by, The method comprises the following steps: S1, drilling holes in the glass substrate (1) to form a plurality of first light-emitting holes (1-1) with wide top and narrow bottom on the glass substrate (1); S2, printing high-temperature-resistant reflective ink on the entire surface of the glass substrate (1), then heating to the softening temperature of the glass substrate (1), and the high-temperature-resistant reflective ink diffuses into the matrix of the glass substrate (1) to form a high-temperature-resistant reflective layer (2) during high-temperature heating, and the first light-emitting hole (1-1) forms a second light-emitting hole (1-2) with wide top and narrow bottom and smooth wall surface during high-temperature heating, and the glass substrate (1) is softened and then solidified to obtain a glass reflective plate (3); Wherein, the heating temperature is 900-1000℃, and the high-temperature-resistant reflective ink can resist high temperature of 1200-1600℃; S3, the glass reflective plate (3) is attached to the glass bottom plate (5), and the glass bottom plate (5) is close to the narrow part of the second light-emitting hole (1-2); S4, electrically connecting the light-emitting element (4) in the second light-emitting hole (1-2), that is, obtaining a lens-free direct type glass backlight plate with five light-emitting surfaces.

2. The method of claim 1, wherein the method further comprises: Step S1, laser drilling holes in the glass substrate (1) to form a plurality of first light-emitting holes (1-1) with uniform distribution and wide top and narrow bottom.

3. The method of claim 1, wherein the method further comprises: The reflectivity of the high-temperature-resistant reflective layer (2) in step S2 is >95%.

4. The method of claim 1, wherein the method further comprises: The thickness of the high-temperature-resistant reflective layer (2) in step S2 is 40±5μm.

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