CN115236791A

CN115236791A - Light guide glass, composite light guide glass, preparation methods of light guide glass and composite light guide glass, and light guide glass device

Info

Publication number: CN115236791A
Application number: CN202210891003.3A
Authority: CN
Inventors: 蓝梓淇; 弋天宝; 林剑; 梁新文; 孔祥锡
Original assignee: Guangdong Green Exhibition Technology Co ltd
Current assignee: Guangdong Green Exhibition Technology Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-10-25
Anticipated expiration: 2042-07-27
Also published as: CN115236791B

Abstract

The invention belongs to the technical field of light guide materials and discloses light guide glass, composite light guide glass, a preparation method thereof and a light guide glass device, wherein the light guide glass comprises a glass substrate, the light transmittance of the glass substrate is 90% -98%, the glass substrate is provided with a light emitting surface and a backlight surface opposite to the light emitting surface, the backlight surface of the glass substrate is provided with a plurality of light guide points, the sizes of the light guide points are 0.02-2.0 mu m, and the distance between the light guide points is 0.3-1.5 mm; wherein, a plurality of light guide points form a target graph. The light guide glass provided by the invention adopts the glass substrate with the light transmittance of 90-98% as the light guide plate, and simultaneously the size of the light guide points is set to be 0.02-2.0 mu m, and the distance between the light guide points is set to be 0.3-1.5 mm, so that the aim of improving the visual effect of a target graph is achieved.

Description

Light guide glass, composite light guide glass, preparation methods of light guide glass and composite light guide glass, and light guide glass device

Technical Field

The invention belongs to the technical field of light guide materials, and particularly relates to light guide glass, composite light guide glass, a preparation method of the composite light guide glass and a light guide glass device.

Background

The light guide plate which is mature in the market at present is mainly used in various household decorative lamps, guide lamps, ultrathin advertising lamp boxes, backlight sources of liquid crystal displays, X-ray film viewers for the medical industry, flat-plate lamp decoration illumination, light effect application of lighting engineering, luminous nameplates and other related fields.

The light guide plate is used for converting the side light source into a surface light source and emitting light uniformly. The principle structure of the light source is that light reflecting net points are printed or laser-engraved on a transparent acrylic or PC plate according to different sizes, areas and sharpness, light is uniformly diffused by utilizing the light reflecting net points printed or engraved on the surface of the light guide plate, and linear light source illumination is converted into a surface light source illumination mode, namely, the light is guided to the direction required by a designer. However, since the existing light guide plate uses acrylic or PC as a substrate, the substrate has limitations in terms of light refractive index and light transmittance, so that the concave-convex portions of the reflective dots are obvious, and the concave-convex portions are more obvious especially under the condition of lighting, resulting in poor visual effect of the final target pattern.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the invention provides light guide glass, composite light guide glass, a preparation method of the composite light guide glass and a light guide glass device, and aims to solve the technical problem that the target pattern visual effect of the traditional light guide plate is poor.

In order to achieve the purpose, the invention provides light guide glass, which comprises a glass substrate, wherein the light transmittance of the glass substrate is 90% -98%, the glass substrate is provided with a light-emitting surface and a backlight surface opposite to the light-emitting surface, the backlight surface of the glass substrate is provided with a plurality of light guide points, the size of each light guide point is 0.02-2.0 mu m, and the distance between the light guide points is 0.3-1.5 mm; wherein, a plurality of light guide points form a target graph.

In the embodiment of the invention, the size of the light guide points is 0.1-1.0 μm, and the distance between the light guide points is 0.5-1.0 mm.

In the embodiment of the invention, the light transmittance of the glass substrate is 92-96%.

In the embodiment of the present invention, the shape of the light guide point is any one of a circle, an ellipse, a regular polygon and an irregular polygon, or a combination of at least two of them.

In the embodiment of the invention, the shape of the light guide point is circular, and the diameter of the light guide point is 0.3-1.3 μm.

In the embodiment of the invention, the thickness of the glass substrate is 1.5-5 mm.

In the embodiment of the invention, the light guide point is formed on the backlight surface of the glass substrate by adopting a laser engraving method.

In the embodiment of the invention, the laser power is 10-40W, the laser frequency is 200-800 KHZ, and the laser speed is 800-1500 mm/s.

In order to achieve the above object, the present invention further provides a composite light guide glass, wherein the composite light guide glass comprises the light guide glass, and further comprises a composite reinforcing layer and an adhesive layer, wherein the adhesive layer adheres the light guide glass and the composite reinforcing layer together, the composite light guide glass can be bent into a curved surface structure under a specific process, and a target graph of the composite light guide glass is not distorted.

In the present embodiment, the adhesive layer is formed of an EVA film or a PVB film.

In the embodiment of the invention, the material of the composite reinforcing layer is glass, PC or PMMA.

In order to achieve the above object, the present invention further provides a method for preparing composite light guide glass, wherein the method for preparing composite light guide glass comprises:

providing a glass substrate, wherein the glass substrate is provided with a light-emitting surface and a backlight surface opposite to the light-emitting surface;

forming a plurality of light guide points on the backlight surface of the glass substrate by adopting a laser engraving method, wherein the size of the light guide points is 0.02-2.0 mu m, and the distance between the light guide points is 0.3-1.5 mm, and the plurality of light guide points form a target pattern;

and compounding the composite reinforcing layer on the backlight surface of the glass substrate through the adhesive layer to obtain the planar composite light guide glass.

In the embodiment of the invention, after the planar composite light guide glass is obtained, the planar composite light guide glass is heated to 580-650 ℃, and the temperature is kept for 5-30min, so that the composite light guide glass with the curved surface structure is obtained.

In order to achieve the above object, the present invention further provides a light guide glass device, wherein the light guide glass device comprises a light source and the above light guide glass or composite light guide glass, and the light source is disposed on a side surface of the light guide glass or composite light guide glass.

Through the technical scheme, the light guide glass provided by the embodiment of the invention has the following beneficial effects:

because the light transmittance of the glass substrate is 90% -98%, the light transmission effect is good, the brightness of the target graph and the hiding effect of the light guide points can be increased, meanwhile, the size of the light guide points is set to be 0.02-2.0 micrometers, the distance between the light guide points is set to be 0.3-1.5 mm, the fineness of the target graph can be increased, and the hiding effect of the light guide points can be ensured. When no side face light source, or when people's eye goes to observe the barn door from one side on the play plain noodles under normal natural light condition, because the hidden effect of leaded light point, leaded light point on the leaded light glass is difficult to be observed, make leaded light glass like ordinary glass, when the side light source shines leaded light glass, the luminous target figure of constituteing of leaded light point, and leaded light point makes unsmooth and unobvious owing to hide the effect, and because leaded light point size, the reason of density and glass luminousness, make the luminance and the fineness of target figure all have very big promotion, thereby increase the visual effect of target figure. In summary, the light guide glass provided by the invention adopts the glass substrate with the light transmittance of 90% -98% as the light guide plate, and simultaneously the size of the light guide points is set to be 0.02-2.0 μm, and the distance between the light guide points is set to be 0.3-1.5 mm, so that the purpose of improving the visual effect of the target graph is achieved.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of a light guide glass according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a composite light guide glass according to an embodiment of the present invention;

FIG. 3 is a microscope image of light guide points formed by laser engraving under conditions of one to six parameters;

fig. 4 is a flowchart of a method for manufacturing the composite light guide glass.

Description of the reference numerals

1. Light guide glass 11 glass substrate

111. Backlight surface of light-emitting surface 112

12. Light guide point 2 adhesive layer

3. Composite reinforced layer 4 light source

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

The present invention will be described with reference to the accompanying drawings.

The invention provides light guide glass 1, wherein as shown in fig. 1, the light guide glass 1 comprises a glass substrate 11, the light transmittance of the glass substrate 11 is 90% -98%, the glass substrate 11 is provided with a light-emitting surface 111 and a backlight surface 112 opposite to the light-emitting surface 111, the backlight surface 112 of the glass substrate 11 is provided with a plurality of light guide points 12, the sizes of the light guide points 12 are 0.02-2.0 mu m, and the distance between the light guide points 12 is 0.3-1.5 mm; wherein, a plurality of light guide points 12 constitute a target pattern.

Because the light transmittance of the glass substrate 11 is 90% -98%, the light transmission effect is good, the brightness of the target graph and the hiding effect of the light guide points 12 can be increased, meanwhile, the size of the light guide points 12 is set to be 0.02-2.0 micrometers, the distance between the light guide points 12 is set to be 0.3-1.5 mm, the fineness of the target graph can be increased, and the hiding effect of the light guide points 12 can be ensured. Referring to fig. 1, when there is no side light source 4, or under the condition of normal natural light, human eyes observe the light guide point 12 from one side of the light emitting surface 111, because of the hidden effect of the light guide point 12, the light guide point 12 on the light guide glass 1 is difficult to observe, so that the light guide glass 1 is the same as common glass, when the side light source 4 irradiates the light guide glass 1, the light guide point 12 emits light to form a target pattern, and the light guide point 12 makes the concave-convex not obvious due to the hidden effect, and because of the size, density and glass light transmittance of the light guide point 12, the brightness and fineness of the target pattern are greatly improved, thereby increasing the visual effect of the target pattern. In summary, the light guide glass 1 provided by the invention adopts the glass substrate 11 with the light transmittance of 90% -98% as the light guide plate, and simultaneously the size of the light guide points 12 is set to be 0.02-2.0 μm, and the distance between the light guide points 12 is set to be 0.3-1.5 mm, so that the purpose of improving the visual effect of the target graph is achieved.

It should be particularly noted that, when the light transmittance is smaller than 90%, the brightness of the target graph displayed by the light guide point 12 is low, and the visual effect is poor; therefore, the light transmittance of the glass substrate 11 is set to 90% to 98%. Considering the influence of the size and the spacing of the light guide points 12 on the hiding effect, the size of the light guide points 12 is set to be 0.02-2.0 mu m, and the distance between the light guide points 12 is set to be 0.3-1.5 mm; if the size of the light guide point 12 is too small, light cannot be guided out, and if the size is too large, the hiding effect is deteriorated; similarly, if the pitch between the light guide points 12 is too small, the hiding effect is deteriorated, and if the pitch is too large, the resolution of the target pattern at the time of lighting-on is too low, and the visual effect is deteriorated.

In the embodiment of the present invention, the size of light guide points 12 is preferably 0.1 to 1.0 μm, and the distance between light guide points 12 is preferably 0.5mm to 1.0mm. Namely, the size of the light guide points 12 is set within the range of 0.1-1.0 μm, and the distance between the light guide points 12 is set within the range of 0.5 mm-1.0 mm, so that the fineness of the target graph and the hiding effect of the light guide points 12 can be ensured to be in a better state.

In the embodiment of the present invention, the light transmittance of the glass substrate 11 is preferably 92% to 96%. That is, the light transmittance of glass substrate 11 is set to 92% to 96%, and the brightness of the target pattern and the hiding effect of light guide point 12 can be both in a good state.

In the embodiment of the present invention, the shape of the light guide point 12 may be any one of a circle, an ellipse, a regular polygon and an irregular polygon, or a combination of at least two of them. The shape of light guide point 12 affects the visual effect of the target pattern and the hiding effect of light guide point 12, so that the shape of light guide point 12 can be adjusted according to different use scenes of light guide glass 1 to match the current use scenes.

In the embodiment of the present invention, the shape of light guide point 12 is preferably circular, and the diameter of light guide point 12 is 0.3 to 1.3 μm. The circular light guide point 12 is simple to process, low in processing cost and capable of adapting to most of use scenes, and when the circular light guide point 12 is used, the size of the light guide point 12 is 0.3-1.3 mu m, so that the display effect is better.

In the embodiment of the present invention, the thickness of the glass substrate 11 is preferably 1.5 to 5mm. Considering that the glass substrate 11 is too thick, on the premise of ensuring the light transmittance, glass with higher grade is required to be used as the glass substrate 11, which inevitably increases the production cost, and the glass substrate 11 is too thin, which reduces the hiding effect of the light guide point 12 and the strength of the light guide glass 1, so that the light guide glass 1 is easily damaged, therefore, it is more suitable to set the glass substrate 11 at 1.5-5 mm.

In the embodiment of the present invention, the light guide point 12 is formed by engraving on the backlight surface 112 of the glass substrate 11 by using a laser engraving method. The laser engraving method is a common processing method in the field of light guide plates, has a mature process, can adapt to fine processing, and has high accuracy and low production cost.

In the embodiment of the invention, the laser power is 10-40W, the laser frequency is 200-800 KHZ, and the laser speed is 800-1500 mm/s. The laser power, the laser frequency and the laser speed have important influences on the formation of the light guide points 12 and the influence on the internal structure of the glass, and if the laser power and the laser frequency are higher and the laser speed is lower, the deeper the recess depth of the light guide points 12 is, the glass substrate 11 is easy to crack, and the larger the deviation value between the target size and the actual size of the light guide points 12 is. Under the irradiation of the side light source 4, the target graph formed by the light guide points 12 of the produced light guide glass 1 has the phenomenon of uneven light emission, the light guide points 12 are obvious in concave and convex, can be seen by human eyes, and is poor in display effect. If the laser power and the laser frequency are too low, the depth of the recess of the light guide point 12 is too shallow, so that the light emitting amount of the target pattern formed by the light guide point 12 is low and the visual effect is poor in the produced light guide glass 1 under the irradiation of the side light source 4. Specifically, as shown in fig. 3, a to F in fig. 3 are microscope images of forming the light guide point 12 by using a laser engraving method under different parameters, respectively; wherein,

the first parameter is as follows: the laser power is 20W, the laser frequency is 400KHZ, and the laser speed is 1000 mm/s;

and a second parameter: the laser power is 30W, the laser frequency is 600KHZ, and the laser speed is 1200 mm/s;

and (3) parameters III: the laser power is 40W, the laser frequency is 800KHZ, and the laser speed is 1500 mm/s;

and a fourth parameter: the laser power is 20W, the laser frequency is 400KHZ, and the laser speed is 600 mm/s;

and V, parameters: the laser power is 20W, the laser frequency is 1000KHZ, and the laser speed is 1000 mm/s;

and a sixth parameter: the laser power is 50W, the laser frequency is 400KHZ, and the laser speed is 1000 mm/s;

the shape of the laser engraved target light guide point 12 is circular, and the diameter is 0.04 μm.

A to F are microscope images of actual light guide points formed under the conditions of one to six parameters respectively.

As shown in a in fig. 3, the diameters of the light guide points 12 formed under the parameter one condition are 0.055/0.055/0.051/0.053 μm, respectively; as shown in fig. 3B, the diameters of the light guide dots 12 formed under the condition of parameter two are 0.056/0.058/0.056/0.055 μm, respectively; as shown in fig. 3C, the diameters of the light guide dots 12 formed under the three parameters are 0.059/0.059/0.056/0.055 μm, respectively; therefore, the shape of the light guide point 12 formed under the condition of one to three parameters is similar to a circle, and the deviation between the actual diameter and the target diameter is small.

As shown in D in fig. 3, the diameters of light guide points 12 formed under the condition of parameter four are 0.069/0.068/0.079/0.074 μm, respectively; as shown in E in fig. 3, the diameters of light guide points 12 formed under the condition of parameter five are 0.079/0.092/0.074/0.078 μm, respectively; as shown in fig. 3F, the diameters of light guide points 12 formed under the six-parameter condition were 0.080/0.089/0.086/0.087 μm, respectively; from this, it is understood that the circular shape of light guide point 12 formed under the D-F condition is irregular, and the deviation between the actual diameter and the target diameter is large.

In addition, the edge of the light guide point 12 formed under the condition of one to three parameters is smooth, and the edge of the light guide point 12 formed under the condition of four to six parameters has more burrs, so that the hiding effect of the light guide point 12 formed under the condition of one to three parameters is better than that of the light guide point 12 formed under the condition of four to six parameters. In summary, the laser power is set within the range of 10-40W, the laser frequency is set within the range of 200-800 KHZ, and the laser speed is set within the range of 800-1500 mm/sec, so that the size of the engraved light guide point 12 is more accurate, and the hiding effect is better.

As shown in fig. 2, in order to achieve the above object, the present invention further provides a composite light guide glass, wherein the composite light guide glass includes the light guide glass 1, and since the composite light guide glass adopts all the technical solutions of the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described in detail herein. The composite light guide glass also comprises a composite reinforcing layer 3 and an adhesive layer 2, wherein the adhesive layer 2 is used for bonding the light guide glass 1 and the composite reinforcing layer 3 together, the composite light guide glass can be bent into a curved surface structure under a specific process, and the target graph of the composite light guide glass is not distorted. The adhesive layer can bond light guide glass 1 and composite reinforcing layer 3 together, and composite reinforcing layer 3 can increase the intensity and ductility of light guide glass 1 for it is cracked that composite light guide glass is processed into the curved surface can avoid it.

In the present embodiment, the adhesive layer 2 is formed of an EVA (Ethylene Vinyl Acetate Copolymer) film or a PVB (Polyvinyl Butyral) film. The EVA material or the PVB material has good ductility, not only can play a role in bonding, but also can play a role in glass breakage prevention.

In the embodiment of the present invention, the material of the composite reinforcement layer 3 may be glass, PC (Polycarbonate), or PMMA (polymethyl methacrylate). Glass, PC and PMMA are the more common substrate in the light guide plate field, acquire simply, and the cost is lower.

As shown in fig. 4, in order to achieve the above object, the present invention further provides a method for preparing composite light guide glass, which can be used for producing the above composite light guide glass, wherein the method for preparing composite light guide glass comprises:

s10: providing a glass substrate 11, wherein the glass substrate 11 has a light-emitting surface 111 and a backlight surface 112 opposite to the light-emitting surface 111;

s20: forming a plurality of light guide points 12 on a backlight surface 112 of a glass substrate 11 by adopting a laser engraving method, wherein the size of each light guide point 12 is 0.02-2.0 mu m, and the distance between every two light guide points 12 is 0.3-1.5 mm, and the light guide points 12 form a target graph;

s30: the composite reinforcing layer 3 is combined with the back surface 112 of the glass substrate 11 through the adhesive layer 2, and thus planar composite light guide glass is obtained.

As shown in fig. 4, in the embodiment of the present invention, after obtaining the planar composite light guide glass, the method further includes:

s40: heating the planar composite light guide glass to 580-650 ℃, and preserving heat for 5-30min to obtain the composite light guide glass with the curved surface structure.

In order to achieve the above object, the present invention further provides a light guide glass device, wherein the light guide glass device comprises a light source 4 and the light guide glass 1 or the composite light guide glass described above, the light source 4 is disposed on a side surface of the light guide glass 1 or the composite light guide glass and can irradiate the light guide glass 1 or the composite light guide glass to make the target pattern composed of the light guide points 12 emit light, and the light source 4 can be an LED or the like or other. Meanwhile, since the light guide glass device adopts all the technical schemes of the above embodiments, at least all the beneficial effects brought by the technical schemes of the above embodiments are achieved, and the description is omitted.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any combination, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The light guide glass is characterized by comprising a glass substrate, wherein the light transmittance of the glass substrate is 90% -98%, the glass substrate is provided with a light emitting surface and a backlight surface opposite to the light emitting surface, the backlight surface of the glass substrate is provided with a plurality of light guide points, the size of each light guide point is 0.02-2.0 mu m, and the distance between the light guide points is 0.3-1.5 mm; wherein, a plurality of the light guide points form a target graph.

2. The light guide glass of claim 1, wherein the light guide dots have a size of 0.1 to 1.0 μm and a distance between the light guide dots is 0.5mm to 1.0mm.

3. The catheter glass according to claim 1, wherein the glass substrate has a light transmittance of 92% to 96%.

4. The light guide glass of claim 1, wherein the shape of the light guide point is any one or a combination of at least two of a circle, an ellipse, a regular polygon and an irregular polygon.

5. The light guide glass according to claim 4, wherein the light guide point has a circular shape and a diameter of 0.3 to 1.3 μm.

6. The light-guiding glass according to claim 1, wherein the glass substrate has a thickness of 1.5 to 5mm.

7. The light guide glass of claim 1, wherein the light guide points are formed on the backlight surface of the glass substrate by a laser engraving method.

8. The light-guiding glass according to claim 7, wherein the laser power is 10 to 40W, the laser frequency is 200 to 800KHZ, and the laser speed is 800 to 1500 mm/sec.

9. A composite light guide glass comprising the light guide glass of any one of claims 1-8, the composite light guide glass further comprising a composite reinforcing layer and an adhesive layer, wherein the adhesive layer is used for bonding the light guide glass and the composite reinforcing layer together, the composite light guide glass can be bent into a curved structure under a specific process, and a target pattern of the composite light guide glass is not distorted.

10. The composite light directing glass of claim 9, wherein the adhesive layer is formed from an EVA film or a PVB film.

11. The composite light guide glass according to claim 9, wherein the material of the composite reinforcing layer is glass, PC or PMMA.

12. The preparation method of the composite light guide glass is characterized by comprising the following steps of:

forming a plurality of light guide points on the backlight surface of the glass substrate by adopting a laser engraving method, wherein the size of the light guide points is 0.02-2.0 mu m, the distance between the light guide points is 0.3-1.5 mm, and the plurality of light guide points form a target pattern;

and compounding a composite reinforcing layer on the backlight surface of the glass substrate through an adhesive layer to obtain the planar composite light guide glass.

13. The method for preparing the composite light guide glass according to claim 12, wherein after the planar composite light guide glass is obtained, the planar composite light guide glass is heated to 580-650 ℃, and the temperature is kept for 5-30min, so that the composite light guide glass with a curved surface structure is obtained.

14. A light guide glass device, comprising a light source and the light guide glass of any one of claims 1 to 8 or the composite light guide glass of any one of claims 9 to 11, wherein the light source is disposed on a side surface of the light guide glass or the composite light guide glass.