CN215340417U

CN215340417U - Peep-proof backlight source structure and medium

Info

Publication number: CN215340417U
Application number: CN202121570241.1U
Authority: CN
Inventors: 李勇; 吴彦龙; 陈道胜
Original assignee: Boxun Photoelectric Technology Hefei Co ltd
Current assignee: Boxun Photoelectric Technology Hefei Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-12-28
Anticipated expiration: 2031-07-12

Abstract

The utility model discloses a peep-proof backlight source structure and a medium, wherein the backlight source structure comprises a first LGP light guide plate and a second LGP light guide plate, a reverse prism is arranged between the first LGP light guide plate and the second LGP light guide plate, a first LED light source is arranged at the end part of the first LGP light guide plate, the first LGP light guide plate comprises a light guide plate main body, light guide plate mesh points distributed in an array mode are arranged below the light guide plate main body, the light guide plate mesh points are of a triangular prism structure, two end faces of the triangular prism structure are distributed in an inclined mode, two side faces of the triangular prism are of a trapezoid structure, the bottom angle of the trapezoid structure is an acute angle, and the obtuse angle of the light guide plate mesh points faces towards the first LED light source. The backlight source structure has a peep-proof mode and a shared highlight mode, and the peep-proof mode and the shared highlight mode can be freely switched to meet market requirements; the single LED power supply works in the peep-proof mode to achieve the energy-saving effect; the double rows of LEDs work in a shared high-brightness mode, and ultra-high-brightness products are visually presented; and privacy or personal safety can be protected in the peep-proof mode.

Description

Peep-proof backlight source structure and medium

Technical Field

The utility model relates to a backlight source structure, in particular to a peep-proof backlight source structure and a medium.

Background

The single main assembly materials of the existing backlight source structure are as follows: an upper diffusion film 001, a brightness enhancement film 002, a lower diffusion film 003, a PC material carrying bracket 004, an LED light emitting source 005, a metal carrying bracket 006, an LGP light guide plate 007 and a reflective film 008 as shown in FIG. 1.

When the product is powered on, the LED light emitting source 005 works to emit a linear light source, light passes through the LGP light guide plate 007 and then is converted into a surface light source, and a surface light source line is formed through the reflecting film 008, the brightness enhancement film 002 and the upper and lower diffusion films 001/003 to condense light to generate the required surface light source angle.

The backlight source structure in the prior art has the following defects:

1. the existing backlight source has a simple structure, and the integral color temperature and brightness of the product can be changed only by changing the color block, brightness and the like of the basic information of the LED luminous source 005, so that the market requirements of peep prevention, energy-saving lamps and the like can not be met;

2. the overall light-emitting angle of the backlight source is single, and only the requirement that the conversion from a line light source to a surface light source cannot specify the required angle can be met;

3. the conventional backlight brightness deviation module 400CD/M2 cannot meet the requirement of higher brightness.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a peep-proof backlight source structure and a medium, wherein the backlight source structure has a peep-proof mode and a shared highlight mode, and the peep-proof mode and the shared highlight mode can be freely switched to meet market requirements; the single LED power supply works in the peep-proof mode to achieve the energy-saving effect; the double rows of LEDs work in a shared high-brightness mode, and ultra-high-brightness products are visually presented; and privacy or personal safety can be protected in the peep-proof mode.

The purpose of the utility model can be realized by the following technical scheme:

a peep-proof backlight source structure comprises a first LGP light guide plate and a second LGP light guide plate, a reverse prism is arranged between the first LGP light guide plate and the second LGP light guide plate, a first LED light source is arranged at the end part of the first LGP light guide plate, the first LGP light guide plate comprises a light guide plate main body, light guide plate mesh points distributed in an array mode are arranged below the light guide plate main body, the light guide plate mesh points are of a triangular prism structure, two end faces of the triangular prism structure are distributed in an inclined mode, two side faces of the triangular prism are of a trapezoid structure, the bottom angle of the trapezoid structure is an acute angle, and the obtuse angle of the light guide plate mesh points faces towards the first LED light source;

the first LED light source is turned on, total reflection light rays are broken through, the light rays are collimated and incident to the second LGP light guide plate after passing through the inverse prism, the slope of the side edge of the mesh point of the light guide plate is small, the light ray collimation effect is not changed, the light rays are incident in a specified direction, and peeping prevention is achieved.

Further, a second LED light source is arranged at the end of the second LGP light guide plate, the first LED light source and the second LED light source are respectively located on two sides of the inverse prism, and a radiation film is arranged below the first LGP light guide plate.

Furthermore, a bearing support is arranged below the first LGP light guide plate, a limiting support is arranged on the bearing support, the limiting support is used for limiting and fixing the first LGP light guide plate and the second LGP light guide plate in the bearing support, and the radiation film is positioned between the first LGP light guide plate and the bearing support.

Further, the second LGP light guide plate has the same structure as the first LGP light guide plate.

Further, the second LGP light guide plate and the first LGP light guide plate both have refractive indices of: 1.5-1.6 of PC material.

Further, the length W of the mesh points of the light guide plate is: 40-60mm, width h is: 20-50mm, height L: 2-10mm, the angular distribution of the two base angles of the base side is divided into: a is 5-30 degrees, b is 45-90 degrees, and the inclination angle c of two end faces of the triangular cylinder structure is 5-30 degrees.

Further, the first LED light source and the second LED light source are started simultaneously, and light of the first LED light source refers to the trend of peep-proof state light; the second LED light source is scattered to the range of 45-65 degrees by a large angle due to the fact that the prism does not have the refraction effect on light rays above the second LED light source, the effect of the whole area light source is achieved, the light splitting design can be switched in a two-way mode, and the high-brightness sharing mode is achieved.

A medium comprising the backlight construction of claim 1.

The utility model has the beneficial effects that:

1. the backlight source structure has a peep-proof mode and a shared highlight mode, and the peep-proof mode and the shared highlight mode can be freely switched to meet market requirements; the single LED power supply works in the peep-proof mode to achieve the energy-saving effect;

2. the backlight source structure works in a shared high-brightness mode by double rows of LEDs and has the visual presentation of ultra-high-brightness products; and privacy or personal safety can be protected in the peep-proof mode.

Drawings

The utility model will be further described with reference to the accompanying drawings.

FIG. 1 is a prior art backlight configuration;

FIG. 2 is a schematic diagram of a backlight configuration according to the present invention;

FIG. 3 is a schematic view of a first LGP light guide plate according to the present invention;

FIG. 4 is a front view of a light guide plate mesh of the present invention;

FIG. 5 is a right side view of a light guide plate mesh of the present invention;

FIG. 6 is a top view of a light guide plate mesh of the present invention;

fig. 7 is a schematic view of the privacy protection of the backlight structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a peep-proof backlight structure, backlight structure includes first LGP light guide plate 2 and second LGP light guide plate 3, be equipped with inverse prism 7 between first LGP light guide plate 2 and the second LGP light guide plate 3, the tip of first LGP light guide plate 2 and second LGP light guide plate 3 is equipped with first LED light source 4 and second LED light source 5 respectively, first LED light source 4 and second LED light source 5 are located the both sides of inverse prism 7 respectively, the below of first LGP light guide plate 2 is equipped with radiation film 6, the below of first LGP light guide plate 2 is equipped with bears support 1, be equipped with spacing support 8 on bearing support 1, spacing support 8 is with first LGP light guide plate 2 and second LGP light guide plate 3 spacing fixing in bearing support 1, radiation film 6 is located between first LGP light guide plate 2 and the bearing support 1.

The first LGP light guide plate 2 includes a light guide plate main body 21, as shown in fig. 3, light guide plate dots 22 distributed in an array are disposed below the light guide plate main body 21, as shown in fig. 4, 5, and 6, the light guide plate dots 22 are triangular prism structures, two end surfaces of the triangular prism structures are distributed in an inclined manner, two side surfaces of the triangular prism structures are trapezoidal structures, a base angle of the trapezoidal structure is an acute angle, and an obtuse angle of the light guide plate dots 22 faces the first LED light source 4.

The second LGP light guide plate 3 has the same structure as the first LGP light guide plate 2.

The second LGP light guide plate 3 and the first LGP light guide plate 2 both have refractive indices: 1.5-1.6 of PC material.

Inverse prism 7 substrate PET (n ≈ 1.62), UV material of prism (n ≈ 1.57).

The length W of the light guide plate mesh 22 is: 40-60mm, width h is: 20-50mm, height L: 2-10mm, the angular distribution of the two base angles of the base side is divided into: a is 5-30 degrees, b is 45-90 degrees, and the inclination angle c of two end faces of the triangular cylinder structure is 5-30 degrees. The traveling angle and the light emitting area of the linear light source can be changed by changing the structural parameters of the mesh points 22 of the light guide plate.

Example 1

Peep-proof mode: by turning on the first LED light source 4, the total reflected light is broken, and the light is collimated and incident to the second LGP light guide plate 3 after passing through the inverse prism 7, the side slope of the light guide plate mesh points 22 is small, the light collimation effect is not changed, and the light is incident in a designated direction, so that peep prevention is realized, as shown in fig. 7.

Example 2

Highlight sharing mode: simultaneously starting the first LED light source 4 and the second LED light source 5, wherein the light of the first LED light source 4 refers to the peep-proof state light trend; the second LED light source 5 is scattered to the range of 45-65 degrees by a large angle due to the refraction effect of the prism on light rays, so that the effect of the whole surface light source is realized, and the bidirectional switchable light splitting design is realized.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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 utility model. In this specification, the schematic representations of the terms used above do not necessarily 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.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.

Claims

1. The utility model provides a peep-proof backlight structure, backlight structure includes first LGP light guide plate (2) and second LGP light guide plate (3), is equipped with inverse prism (7) between first LGP light guide plate (2) and the second LGP light guide plate (3), and the tip of first LGP light guide plate (2) is equipped with first LED light source (4), its characterized in that, first LGP light guide plate (2) include light guide plate main part (21), and the below of light guide plate main part (21) is equipped with light guide plate site (22) that the array distributes, and light guide plate site (22) are the triangle cylinder structure, and two terminal surfaces slope of triangle cylinder structure distribute, and two sides of triangle cylinder are the trapezium structure, and the base angle of trapezium structure is the acute angle, and the obtuse angle of light guide plate site (22) is towards first LED light source (4);

the light rays which are totally reflected are broken through turning on the first LED light source (4), the light rays are collimated and incident to the second LGP light guide plate (3) after passing through the inverse prism (7), the side slope of the mesh points (22) of the light guide plate is small, the light ray collimation effect is not changed, the light rays are incident in a specified direction, and peeping prevention is achieved.

2. The privacy backlight structure according to claim 1, wherein the second LGP light guide plate (3) is provided at its end with a second LED light source (5), the first LED light source (4) and the second LED light source (5) are respectively located at both sides of the inverse prism (7), and a radiation film (6) is provided under the first LGP light guide plate (2).

3. The privacy backlight structure according to claim 1 or 2, wherein a supporting frame (1) is disposed under the first LGP light guide plate (2), a position-limiting frame (8) is disposed on the supporting frame (1), the position-limiting frame (8) position-limiting fixes the first LGP light guide plate (2) and the second LGP light guide plate (3) in the supporting frame (1), and the radiation film (6) is disposed between the first LGP light guide plate (2) and the supporting frame (1).

4. The privacy backlight structure as claimed in claim 1, wherein the second LGP light guide plate (3) is identical in structure to the first LGP light guide plate (2).

5. The privacy backlight structure as claimed in claim 1, wherein the second LGP light guide plate (3) and the first LGP light guide plate (2) each have a refractive index of: 1.5-1.6 of PC material.

6. The privacy backlight structure of claim 1, wherein the length W of the light guide plate dots (22) is: 40-60mm, width h is: 20-50mm, height L: 2-10mm, the angular distribution of the two base angles of the base side is divided into: a is 5-30 degrees, b is 45-90 degrees, and the inclination angle c of two end faces of the triangular cylinder structure is 5-30 degrees.

7. The backlight structure according to claim 1, wherein the first LED light source (4) and the second LED light source (5) are turned on simultaneously, and the light of the first LED light source (4) is oriented with reference to the peep-proof light; the second LED light source (5) is scattered to the range of 45-65 degrees by a large angle due to the fact that no prism is arranged above the second LED light source to refract light, the effect of the whole area light source is achieved, light splitting is switchable in two directions, and a high-brightness sharing mode is achieved.

8. A medium comprising the backlight structure of claim 1.