CN201007769Y - Improved structure of backlight module - Google Patents

Abstract

The light guide plate in the backlight module of the present invention is a component for converting the straight light incident from the light emitting component into vertical plane light; the lower and upper plate surfaces of the light guide plate are respectively provided with a first and a second light collecting prism mechanisms in a continuous sawtooth groove shape, the first and the second light collecting prism mechanisms of the lower and the upper plate surfaces are respectively arranged in a X, Y direction, the upper part of the light guide plate is provided with a prism sheet, the upper plate surface of the prism sheet is also provided with a third light collecting prism mechanism in a continuous sawtooth groove shape, and the second and the third light collecting prism mechanisms are respectively arranged in the same or different directions, so that the brightness of light emitted by the light emitting component through the light guide plate and the prism sheet is higher, and the use of other optical films can be reduced, thereby effectively reducing the thickness of the backlight module.

Description

Structural Improvement of Backlight Module

technical field

The utility model aims at improving the structure of the backlight module, and aims to provide an improved structure of the backlight module which can increase the luminance of light and reduce the use of other optical films to effectively reduce the thickness of the backlight module.

Background technique

The basic structure of the backlight module of a general liquid crystal display (Liquid Crystal Display, LCD) is shown in Figure 1, which consists of a light guide plate (LGP) 11 and a light-emitting component 12 (such as a cold cathode lamp: Cold Cathode Fluorescernt Lamp, CCFL), reflective film 13 arranged under the light guide plate 11, and diffuser film 14 arranged between the light guide plate 11 and the display panel 30 and other components.

Among them, the main function of the light guide plate 11 is to convert the incident straight light of the light-emitting component 12 into a vertical plane light by the principle of light scattering. Two light-increasing films 15 will be added, and a light-collecting prism mechanism 151 (the light-collecting prism mechanism is in the shape of a continuous zigzag groove) is provided on the upper surface of each light-enhancing film 15 to achieve the effect of scattering and uniform light; however, In addition, increasing the use of the brightness enhancement film not only increases the cost, but also increases the thickness of the backlight module.

Utility model content

In view of this, the object of the present invention is to provide an improved structure of the backlight module which can increase the luminance of light and reduce the use of other optical films, so as to effectively reduce the thickness of the backlight module.

The technical solution adopted by the utility model is to respectively construct the first and second light collecting prism mechanisms in the shape of continuous zigzag grooves on the lower and upper surfaces of the light guide plate, the first and second light collecting prism mechanisms on the lower and upper surfaces The prism mechanisms are arranged in the X and Y directions respectively, and a prism sheet is arranged on the top of the light guide plate, and the upper surface of the prism sheet is also constructed with a third light-collecting prism mechanism in the shape of continuous zigzag grooves, and the second and third light-collecting prism mechanisms The prism mechanisms are arranged in the same or different directions respectively.

The beneficial effects of the utility model are: the luminance of the light emitted by the light-emitting component through the light guide plate and the prism sheet is higher, and the use of other optical films can be reduced, so as to effectively reduce the thickness of the backlight module.

Description of drawings

FIG. 1 is a structure diagram of a backlight module of a conventional liquid crystal display;

Fig. 2 is a perspective view of the structure of the light guide plate in the utility model;

Fig. 3 is the structural representation of the first included angle in the utility model;

Fig. 4 is the structural representation of the fourth included angle of the utility model;

Fig. 5 is the structural diagram of the backlight module of the liquid crystal display in the utility model;

Fig. 6 is another perspective view of the structure of the light guide plate in the present invention;

FIG. 7 is another structural perspective view of the light guide plate in the present invention.

【Description of figure number】

11 Light guide plate 12 Light emitting components

13 Reflective diaphragm 14 Diffusion diaphragm

15 Brightening diaphragm 151 Light collecting prism mechanism

21 Light guide plate 211 First light collecting prism mechanism

212 The second light collecting prism mechanism 213 The first included angle

22 Prism sheet 221 Third light collecting prism mechanism

222 Fourth included angle 23 Lighting components

24 Reflective film 25 Optical mechanism of atomization

31 first hypotenuse 311 first included angle

32 Second hypotenuse 321 Second included angle

40 Display Panel 50 Diffuser

Detailed ways

The structure of the backlight module of the utility model is improved. The light guide plate of the backlight module is a component that converts the straight light incident by the light-emitting component into a vertical plane light. As shown in Figure 2, the light guide plate 21 can be made of acrylic The first and second light-collecting prism mechanisms 211 and 212 in the shape of continuous sawtooth grooves are directly constructed on the lower and upper board surfaces, and the first and second light-collecting prism mechanisms 211 and 212 are arranged under the light guide plate 21 and on the upper board surface. The prism mechanisms 211 and 212 are respectively arranged in the X and Y directions. For example, the first light-collecting prism mechanism 211 arranged on the lower plate is arranged horizontally and has a first angle, while the second light-collecting prism mechanism 212 on the upper plate is Forming a vertical arrangement and having a second included angle 213 , please also refer to FIG. 3 , the second included angle 213 is between 80 degrees and 140 degrees.

Wherein, a prism sheet 22 is arranged above the light guide plate 21, and the upper surface of the prism sheet 22 is also constructed with a third light collecting prism mechanism 221 in the shape of a continuous zigzag groove, and the third light collecting prism mechanism 221 is connected with the light guide plate. The second light collecting prism mechanism 212 on the upper surface of 21 is respectively arranged in the same direction, and the third light collecting prism mechanism 221 is perpendicular to the light-emitting component 23, as in the embodiment of this figure, the second light collecting prism mechanism 212 is vertical arrangement, so the third light-collecting prism mechanism 221 forms a vertical arrangement and has a fourth included angle 222 , as shown in FIG. 4 , the fourth included angle 222 is between 80° and 100°.

During specific implementation, the light-emitting assembly 23 is arranged at the edge of the light guide plate 21, as shown in FIG. The backlight module is composed of prism sheet 22 and other components. The light emitted by the light-emitting assembly 23 first passes through the light guide plate 21 and converts the straight light into vertical plane light. It collects light in one direction and adjusts the divergence angle of light, and has the functions of concentrating light, increasing light, and scattering uniform light, which can increase light brightness and reduce the use of other optical films, so as to effectively reduce the thickness of the backlight module; of course, it can also A diffusion sheet 50 is disposed between the prism sheet 22 and the display panel 40 to increase the diffusion effect of the light source.

In addition, as shown in FIG. 6 , the light guide plate 21 is subjected to fogging treatment on the plate surface area near the side, so that the optical mechanism 25 of fogging is formed on the plate surface near the side, and the optical mechanism 25 of fogging alleviates the light guide plate 21. The light source that enters the light guide plate is reversely refracted to solve the problem of uneven brightness and darkness in the side area of the conventional light guide plate, so that the liquid crystal display has a more uniform brightness performance effect.

Moreover, each light-collecting prism mechanism can have different forms, as shown in Figure 2, the first light-collecting prism mechanism 211 on its lower board is arranged horizontally and has an included angle, and the second light-collecting prism on the upper board surface The mechanism 212 is arranged vertically and has an included angle, and the first light-collecting prism mechanism 211 is a group of three zigzag grooves and arranged at intervals; in the embodiment shown in FIG. 6 , the light guide plate 21 The first light-collecting prism mechanism 211 on the lower plate is also arranged horizontally and has an included angle, and the second light-collecting prism mechanism 212 on the upper plate is arranged vertically and has an included angle. There is no gap between the saw-toothed grooves of the light-collecting prism mechanism 211, but the adjacent saw-toothed grooves extend to the entire lower surface of the light guide plate 21. Please refer to FIG. The first light-collecting prism mechanism 211 has a continuous zigzag groove with first and second hypotenuses 31, 32, and the first and second hypotenuses 31, 32 form first and second included angles 311, 31, 32 and light guide plate 21 of different angles. 321.

In addition, the third light collecting prism mechanism 221 and the second light collecting prism mechanism 212 on the upper surface of the light guide plate 21 can also be arranged in the X and Y directions, as shown in FIG. 7 , the first light collecting prism on the lower plate surface The mechanism 211 is arranged horizontally, the second light-collecting prism mechanism 212 on the upper surface is arranged vertically, and the third light-collecting prism mechanism 221 on the upper surface of the prism sheet 22 is arranged horizontally, which also has the functions of light-gathering, light-enhancing and scattering. The efficacy of light.

As mentioned above, the utility model provides another preferable and feasible light guide plate structure for the backlight unit, so an application for a new patent is submitted according to the law; however, the above implementation description and drawings are the preferred embodiments of the utility model , not to limit the utility model with this, therefore, all similar and identical structures, devices, features, etc. of the utility model should belong to the creation purpose of the utility model and within the scope of the patent application.

Claims (7)

1. A structural improvement of a backlight module, comprising a light guide plate in its backlight module; It is characterized in that: The lower and upper surfaces of the light guide plate are respectively constructed with the first and second light-collecting prism mechanisms in the shape of continuous sawtooth grooves, and the first and second light-collecting prism mechanisms on the lower and upper surfaces are respectively arranged in X and Y directions , and a prism sheet is arranged above the light guide plate, and the upper surface of the prism sheet is also constructed with a third light-collecting prism mechanism in the shape of a continuous zigzag groove, and the second and third light-collecting prism mechanisms are respectively the same or X, Y direction. 2. The structural improvement of the backlight module according to claim 1, wherein the third light-collecting prism mechanism is perpendicular to the light-emitting component. 3 . The structural improvement of the backlight module according to claim 1 , wherein the optical mechanism of atomization is arranged on the surface of the light guide plate near the side. 4 . 4. The structural improvement of the backlight module according to claim 1, wherein the first light-collecting prisms on the lower panel are arranged horizontally and have a first included angle, and the second light-collecting prisms on the upper panel The mechanism forms a vertical arrangement with a second included angle, and the first light-collecting prism mechanism is a group of three zigzag grooves and arranged at intervals. 5. The structural improvement of the backlight module according to claim 1, wherein the first light-collecting prisms on the lower panel are arranged horizontally and have a first included angle, and the second light-collecting prisms on the upper panel The mechanism forms a vertical arrangement, and the first light-collecting prism mechanism has continuous zigzag grooves with first and second hypotenuses, and the first and second hypotenuses form first and second included angles with the light guide plate. 6. The structural improvement of the backlight module according to claim 1, wherein the second light-collecting prisms on the upper surface are arranged vertically and have a second included angle, and the second included angle is between 80 degrees and 140 degrees. between degrees. 7. The structural improvement of the backlight module according to claim 1, wherein the third light-collecting prisms on the upper surface of the prism sheet are arranged vertically and have a fourth included angle, and the fourth included angle is between 80 degrees to Between 100 degrees.

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