CN214375370U - Glass light guide plate and glass diffusion plate fuse structure in a poor light - Google Patents

Abstract

The utility model discloses a backlight structure with a glass light guide plate and a glass diffusion plate integrated, which comprises a reflecting plate, a glass light guide plate, a diffusion ink layer, a glass diffusion plate, an OCA glue and an optical film from inside to outside in sequence; the back of the glass light guide plate is printed with light guide dots; and the side of the glass light guide plate is provided with an LED light source group. The utility model discloses replace current plastics light guide plate and plastics diffuser plate with glass light guide plate and glass diffuser plate, reduce the coefficient of expansion in using. The glass light guide plate and the glass diffusion plate are fused together, and the display is realized in a side-in backlight mode. The whole structure is simple and reliable.

Description

Glass light guide plate and glass diffusion plate fuse structure in a poor light

Technical Field

The utility model relates to a LCD screen structure technical field in a poor light, especially a glass light guide plate fuses structure in a poor light with glass diffuser plate.

Background

Currently, LED display is still the mainstream technology. For example, a liquid crystal television (also called LED backlight television, commonly called LED television) is composed of a light source and a transparent panel with a picture in light emitting principle. The transparent panel itself does not emit light and imaging requires another crucial component, the backlight. When the picture of the transparent panel changes and the light source provides light for the transparent panel, a dynamic and bright picture can be seen. The LED liquid crystal television just uses LED light as a backlight source of the television, and provides stable brightness and color expression.

There are generally two divisions of LED backlights. Firstly, the light source color emitted by the LED is divided into a white light LED backlight source and an RGB-LED backlight source, and the white light LED with lower cost is adopted by the television in the market generally. Second, the division into injection positions can be: direct-type and side-type are also the means for distinguishing the backlight from the backlight in wide use.

The side-in backlight is a backlight formed by arranging linear or point-shaped light sources at the side edge of a specially designed light guide plate. The light guide plate principle is that the interference phenomenon of light is destroyed by utilizing the mesh point distribution (pattern) at the bottom of the light guide acrylic Plate (PMMA), a line light source is uniformly converted into a surface light source, the light guide plate has the function of guiding the scattering direction of light, the light distribution is more uniform, the shadow of a reflection point cannot be seen from the front side, the brightness of the panel is improved, the uniformity of the brightness of the panel is ensured, the good performance of the light guide plate has great influence on backlight, and the light guide plate can be made into a double-side type, a three-side type or even a four-side type according to the actual use requirement. The side-in backlight can be thin, but the backlight has low light utilization rate, and the thinner the backlight is, the smaller the utilization rate is. When the side-light type LED backlight source is applied to the LCDs with medium and large sizes, the weight and the cost of the light guide plate can be increased along with the increase of the sizes, the luminous brightness and the uniformity are not ideal, meanwhile, the side-light type LED backlight liquid crystal television can only realize simple one-dimensional dimming because the light guide plate is adopted, and the direct type LED backlight source is good in performance and can realize the area dynamic control of the liquid crystal television. The direct type backlight source process is relatively simple, a light guide plate is not needed, a light source (an LED wafer array) and a PCB (printed circuit board) are arranged at the bottom of the backlight source, and light rays are uniformly emitted from LEDs, pass through a reflector plate at the bottom and then pass through a diffusion plate and a brightness enhancement film on the surface. The thickness of the backlight is mainly determined by the height of the cavity between the reflecting film and the scattering plate.

First, the light guide plate is used as an accessory of the edge-type backlight module, and the diffuser plate is used as an accessory of the direct-type backlight module, and usually, the light guide plate and the diffuser plate are not integrated in the same backlight module. Secondly, in practical application, the common light guide plate and the common diffusion plate are made of plastic materials, and when the common light guide plate and the common diffusion plate are applied to a large-size liquid crystal screen, the expansion coefficient of the plastic materials is large, so that a black border area (BM area) of the liquid crystal screen is large.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to above-mentioned prior art not enough, a glass light guide plate and glass diffuser plate fuse structure in a poor light is provided.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: a backlight structure with a glass light guide plate and a glass diffusion plate integrated comprises a reflecting plate, a glass light guide plate, a diffusion ink layer, a glass diffusion plate, an OCA glue and an optical film in sequence from inside to outside; the back of the glass light guide plate is printed with light guide dots; and the side of the glass light guide plate is provided with an LED light source group.

In the technical scheme, the glass diffusion plate comprises a glass base layer, a UV ink layer covers the front surface of the glass base layer, an optical film covers the surface of the UV ink layer, and V-shaped grooves which are continuously and uniformly distributed are formed in the surface of the UV ink layer.

In the technical scheme, the distance between the adjacent V-shaped grooves is 20 +/-2 microns, and the depth is 10 +/-2 microns.

In the technical scheme, the diffusion ink layer is transparent resin ink doped with nanoscale light diffusion particles.

In the technical scheme, the diffusion ink layer is composed of a plurality of uniformly distributed diffusion ink dots.

The utility model has the advantages that: the glass light guide plate and the glass diffusion plate are used for replacing the existing plastic light guide plate and the existing plastic diffusion plate, so that the expansion coefficient in application is reduced. The glass light guide plate and the glass diffusion plate are fused together, and the display is realized in a side-in backlight mode. The whole structure is simple and reliable.

Drawings

Fig. 1 is a schematic view of the backlight structure of the present invention.

Fig. 2 is a schematic diagram of an embodiment of a backlight structure according to the present invention.

Fig. 3 is a schematic diagram of another embodiment of the backlight structure of the present invention.

In the figure, 1, a reflection plate; 2. a glass light guide plate; 3. a diffusion ink layer; 4. a glass diffuser plate; 5. OCA glue; 6. an optical film; 7. light guide dots; 8. a glass substrate; 9. a UV ink layer; 10. an optical film; 11. a V-shaped groove; 12. and the LED light source group.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

As shown in fig. 1, a backlight structure with a glass light guide plate 2 and a glass diffusion plate 4 integrated comprises a reflection plate 1, a glass light guide plate 2, a diffusion ink layer 3, a glass diffusion plate 4, OCA glue 5 and an optical film 6 in sequence from inside to outside; the back of the glass light guide plate 2 is printed with light guide dots 7; an LED light source group 12 is arranged at the side of the glass light guide plate 2. The principle of the glass light guide plate 2 is to uniformly convert a linear light source into a surface light source by utilizing the interference phenomenon that the distribution of the dots at the bottom of the light guide acrylic plate destroys light, and the principle is to guide the scattering direction of the light, so that the light distribution is more uniform, the shadow of a reflection point cannot be seen from the front, and the uniformity of the brightness of a liquid crystal screen is ensured. The glass diffusion plate 4 is a physical phenomenon that light rays are refracted, reflected and scattered when encountering two media with different refractive indexes in the traveling path by a chemical or physical means, and the traveling path of the light rays is changed by adding an inorganic or organic light diffusion agent to the base of the glass base material or artificially adjusting the light rays by the array arrangement of micro-feature structures on the surface of the glass base material so that the light rays are refracted, reflected and scattered in different directions, thereby realizing the effect of optical diffusion by fully diffusing the color of the incident light.

In some embodiments, as shown in fig. 3, the glass diffusion plate 4 includes a glass base layer 8, a UV ink layer 9 covers the front surface of the glass base layer 8, the surface of the UV ink layer 9 is covered with an optical film 10, and the surface of the UV ink layer 9 has V-shaped grooves 11 distributed continuously and uniformly. The distance between the adjacent V-shaped grooves 11 is 20 +/-2 mu m, and the depth is 10 +/-2 mu m. The preparation method of the UV ink layer 9 with the V-shaped grooves 11 comprises the following steps: firstly, the front surface of the glass substrate 8 is covered with a layer of UV ink by means of printing or ink-jet, and the exposure amount is 200mj/cm under the environment of 160 DEG C³The UV light is continuously irradiated for 10 minutes, and a semi-solidified UV ink layer 9A is obtained on the front side of the glass substrate 8; secondly, pressing a V-shaped groove 11 on the surface of the UV ink layer 9A by using a V-shaped groove 11 forming tool, and obtaining a semi-solidified UV ink layer 9B with the V-shaped groove 11 on the front surface of the glass base layer 8; finally, the UV ink layer 9B is exposed to 400mj/cm at 160 DEG C³The UV light of (a) is continued for 10 minutes to obtain a fully cured UV ink layer 9 on the front side of the glass substrate layer 8.

In some embodiments, as shown in fig. 2, the diffusing ink layer 3 is a transparent resin ink incorporating nano-scale light-diffusing particles. The diffusion ink layer 3 is composed of a plurality of uniformly distributed diffusion ink dots. The light diffusion particles are generally prepared by blending transparent polymer base material resin and light diffusion microsphere particles. The light-diffusing microsphere particles include inorganic particles such as SiO2 and BaSO4, and organic polymer particles such as acrylic crosslinked microspheres, Polystyrene (PS), silicone resin, and the like. The light diffusion plastic prepared by filling the light diffusion particles into the plastic has high light transmittance and haze, and can be used as a surface light source.

In this embodiment, the LED light source set 12 is located at the side of the glass light guide plate 2 to form a side-in backlight module, and the LED light is emitted from the LED light source set 12, emitted out through the glass light guide plate 2 and the reflective plate 1 toward the glass diffuser plate 4, and then emitted out through the optical film 6. The glass light guide plate 2 transmits the light of the first light source of the LED light source set 12 to the whole light guide plate and is reinforced by the reflector 1 to form a second light source to be emitted toward the glass diffuser plate 4, and the second light source and the glass diffuser plate 4 are combined to form a form similar to a direct type backlight module.

The above embodiments are merely illustrative and not restrictive, and all equivalent changes and modifications made by the methods described in the claims are intended to be included within the scope of the present invention.

Claims (5)

1. The utility model provides a glass light guide plate fuses structure in a poor light with glass diffuser plate which characterized in that: the light guide plate sequentially comprises a reflecting plate, a glass light guide plate, a diffusion ink layer, a glass diffusion plate, OCA glue and an optical film from inside to outside; the back of the glass light guide plate is printed with light guide dots; and the side of the glass light guide plate is provided with an LED light source group.

2. The backlight structure of claim 1, wherein the backlight structure comprises: the glass diffusion plate comprises a glass base layer, a UV ink layer covers the front surface of the glass base layer, an optical film covers the surface of the UV ink layer, and V-shaped grooves which are continuously and uniformly distributed are formed in the surface of the UV ink layer.

3. The backlight structure of claim 2, wherein the backlight structure comprises: the distance between the adjacent V-shaped grooves is 20 +/-2 mu m, and the depth is 10 +/-2 mu m.

4. The backlight structure of claim 1, wherein the backlight structure comprises: the diffusion ink layer is transparent resin ink doped with nanoscale light diffusion particles.

5. The backlight structure of claim 1 or 4, wherein: the diffusion ink layer is composed of a plurality of uniformly distributed diffusion ink dots.

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