CN219085174U

CN219085174U - Light guide plate and backlight assembly

Info

Publication number: CN219085174U
Application number: CN202223604079.8U
Authority: CN
Inventors: 祁亚洲; 徐勇
Original assignee: Jiangsu TSD Electronics Technology Co Ltd
Current assignee: Jiangsu TSD Electronics Technology Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-26
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a light guide plate and a backlight assembly, wherein the light guide plate comprises a mirror body, a mirror crown and a mirror seat, the mirror crown and the mirror seat are respectively arranged on two end surfaces of the mirror body, the mirror crown comprises a plurality of first protruding parts which are arranged in parallel at intervals, second protruding parts which are arranged in parallel at intervals along the surfaces of the first protruding parts are also arranged on the first protruding parts, the length direction of the first protruding parts is a first direction, the length direction of the second protruding parts is a second direction, and the first direction is parallel to the second direction. The light guide plate of the structure is provided with the first protruding parts which are arranged at a plurality of parallel intervals on the surface of the mirror crown, and the surface of the first protruding parts is provided with the second protruding parts which are arranged at a plurality of parallel intervals, so that light rays emitted to the mirror crown from the mirror body can enter the second protruding parts to be refracted for the second time after being refracted for the first time by the first protruding parts, and the visual angle of the light guide plate and the display equipment adopting the light guide plate is improved.

Description

Light guide plate and backlight assembly

Technical Field

The utility model relates to the technical field of displays, in particular to a light guide plate and a backlight assembly.

Background

The LCD is an active matrix LCD driven by thin film transistors, which mainly uses current to stimulate liquid crystal molecules to generate points, lines and surfaces to be matched with back lamps to form a picture. The working principle is that under the action of an electric field, the arrangement direction of liquid crystal molecules is utilized to change the light transmittance of an external light source, so as to complete electro-optical conversion, and then different excitation of R, G, B three primary color signals is utilized, and color reproduction of a time domain and a space domain is completed through red, green and blue three primary color filter films.

The visual angle of the liquid crystal display is limited by the visual angle of the liquid crystal screen, and when the visual angle needs to be increased, one method is to increase the visual angle by adding a full visual angle light compensation film on the surface of the liquid crystal screen, so that a large amount of cost is required to be increased, and the problem that the manual bonding cannot meet the bonding degree can be caused.

Another method is to add a high-gain optical compensation film in the backlight module, the cost of the film is very expensive, the assembly difficulty is high, and the problem of waste caused by assembly errors is easy to occur.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that the liquid crystal display in the prior art has smaller visual angle, which results in the defect of smaller visual angle of the display using the liquid crystal display.

The utility model provides a light guide plate, which comprises a mirror body, a mirror crown and a mirror seat, wherein the mirror crown and the mirror seat are respectively arranged on two end surfaces of the mirror body, the mirror crown comprises a plurality of first protruding parts which are arranged in parallel at intervals, second protruding parts which are arranged in parallel at intervals along the surfaces of the first protruding parts are also arranged on the first protruding parts, the length direction of the first protruding parts is a first direction, the length direction of the second protruding parts is a second direction, and the first direction is parallel to the second direction.

Optionally, in the above light guide plate, the lens base includes a plurality of concave portions disposed at intervals.

Optionally, in the above light guide plate, the lens base includes a plurality of concave portions disposed in parallel and at intervals.

Optionally, in the above light guide plate, a length direction of the recess is a third direction, and the third direction and the first direction form an included angle.

Optionally, the third direction is perpendicular to the first direction.

Optionally, in the above light guide plate, the concave portion is tapered along a section perpendicular to a length direction thereof in a direction along the lens base toward the lens crown.

Optionally, in the light guide plate, the first protrusion is tapered along a cross section perpendicular to a length direction of the first protrusion along a direction of the lens base toward the lens crown; and/or the number of the groups of groups,

the second protruding portion is tapered along a section perpendicular to the length direction of the second protruding portion in the direction along the lens base towards the lens crown.

Optionally, the light guide plate further includes a reflective surface, where the reflective surface is disposed between two adjacent first protruding portions, and the reflective surface is adapted to reflect light emitted between two adjacent first protruding portions back into the lens body.

The utility model provides a backlight unit, includes backplate, panel, support, complex film, reflector and foretell light guide plate, the panel with the backplate is located the both ends of support enclose jointly and become to hold the cavity, the light guide plate set up in hold the cavity, the reflector shop in the light guide plate with between the backplate, the reflector is suitable for with the orientation light reflection back of reflector in the light guide plate, the complex film shop in the light guide plate is close to the one end of panel.

Optionally, the backlight assembly further includes a light source member and a substrate mounted in the accommodating cavity, wherein the light source member is electrically connected with the substrate, and the substrate is suitable for being electrically connected with an external power supply.

The technical scheme provided by the utility model has the following advantages:

1. the utility model provides a light guide plate, which comprises a mirror body, a mirror crown and a mirror seat, wherein the mirror crown and the mirror seat are respectively arranged on two end surfaces of the mirror body, the mirror crown comprises a plurality of first protruding parts which are arranged in parallel at intervals, second protruding parts which are arranged in parallel at intervals along the surfaces of the first protruding parts are also arranged on the first protruding parts, the length direction of the first protruding parts is a first direction, the length direction of the second protruding parts is a second direction, and the first direction is parallel to the second direction.

The light guide plate of this structure is through setting up the first bellying that a plurality of parallel intervals set up on the mirror crown surface to set up the second bellying that a plurality of parallel intervals set up on first bellying surface, can make the light that is in the mirror body to the mirror crown after the first refraction of first bellying, get into the second bellying and carry out the second refraction again, increased the divergence degree of light behind the light guide plate of this structure, thereby improved the visual angle of this light guide plate and adopted the display device of this light guide plate.

2. The utility model provides a light guide plate, wherein a lens base comprises a plurality of concave parts which are arranged at intervals. The light guide plate with the structure is provided with the plurality of concave parts at intervals, so that light can be absorbed and scattered when entering the light guide plate from outside through the concave parts, the utilization rate of the light guide plate for the light is increased, the display brightness of the light guide plate is improved, or when the light guide plate with the structure is required to be used to achieve the same brightness as the light guide plate in the prior art, only lower power consumption is needed, and the consumption of resources is saved.

3. The third direction and the first direction of the light guide plate provided by the utility model are mutually perpendicular. Since the light guide plate of this structure employs the first protrusions disposed along the first direction and the second protrusions disposed along the second direction, this has only an effect of enhancing the display effect perpendicular to the first direction, which depends on the arrangement structure of the light sources. The light guide plate with the structure is provided with the concave part perpendicular to the first direction, so that light rays can be scattered in the third direction perpendicular to the concave part after entering the concave part, the defect of insufficient display effect of the light guide plate in the first direction is overcome, and the display effect of the light guide plate is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of a backlight assembly provided in embodiment 2 of the present utility model;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is a cross-sectional view of the backlight assembly provided in embodiment 2 of the present utility model rotated 90 degrees;

fig. 4 is an isometric view of the light guide plate provided in embodiment 1 of the present utility model;

fig. 5 is a front view of the light guide plate provided in embodiment 1 of the present utility model;

fig. 6 is a left side view of the light guide plate provided in embodiment 1 of the present utility model;

fig. 7 is a top view of the light guide plate provided in embodiment 1 of the present utility model;

fig. 8 is a bottom view of the light guide plate provided in embodiment 1 of the present utility model;

fig. 9 is a schematic structural view of a backlight assembly provided in embodiment 2 of the present utility model;

reference numerals illustrate:

1-a light guide plate; 11-a mirror body; 12-crown; 121-a first boss; 122-a second boss; 13-a lens base; 131-a depression;

2-a back plate;

3-panels;

4-a bracket;

5-composite membrane.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The embodiment provides a light guide plate, as shown in fig. 1 to 9, including a mirror body, a mirror crown and a mirror seat, the mirror crown and the mirror seat are respectively arranged on two end surfaces of the mirror body, the mirror crown includes a plurality of first protruding parts arranged at intervals in parallel, a second protruding part arranged at intervals in parallel along the surface of the first protruding part is further arranged on the first protruding part, the length direction of the first protruding part is a first direction, the length direction of the second protruding part is a second direction, and the first direction is parallel to the second direction.

The light guide plate provided in this embodiment, as shown in fig. 6 and 8, the lens base includes a plurality of concave portions disposed at intervals. The light guide plate with the structure is provided with the plurality of concave parts at intervals, so that light can be absorbed and scattered when entering the light guide plate from outside through the concave parts, the utilization rate of the light guide plate for the light is increased, the display brightness of the light guide plate is improved, or when the light guide plate with the structure is required to be used to achieve the same brightness as the light guide plate in the prior art, only lower power consumption is needed, and the consumption of resources is saved. In this embodiment, the lens base includes a plurality of concave portions disposed at intervals.

In the light guide plate provided in this embodiment, as shown in fig. 2, the length direction of the recess portion is a third direction, and the third direction is disposed at an included angle with the first direction. Since the light guide plate of this structure employs the first protrusions disposed along the first direction and the second protrusions disposed along the second direction, this has only an effect of enhancing the display effect perpendicular to the first direction, which depends on the arrangement structure of the light sources. The light guide plate of this structure is the depressed part that the contained angle set up through setting up with first direction, can make light at least partial light perpendicular to third direction scattering after getting into the depressed part to make up the shortcoming that this light guide plate is not enough in the display effect of first direction, further improved the display effect of this light guide plate. Preferably, the third direction is perpendicular to the first direction. The light guide plate with the structure is provided with the concave part perpendicular to the first direction, so that light rays can be scattered in the third direction perpendicular to the concave part after entering the concave part, the defect of insufficient display effect of the light guide plate in the first direction is overcome, and the display effect of the light guide plate is further improved.

As shown in fig. 1 to 9, the light guide plate provided in this embodiment has a concave portion that tapers along a direction along the lens base toward the lens crown along a cross section perpendicular to the length direction thereof. The concave part that is the convergent setting can have as little bottom area as possible in having great inlet, and the concave part of this structure can enlarge the absorption and the scattering efficiency to light to can make this light guide plate and adopted this light guide plate's display device have better display brightness and display effect.

In the light guide plate provided in this embodiment, as shown in fig. 2, the first protruding portion is tapered along the cross section perpendicular to the length direction of the first protruding portion in the direction along the lens base toward the lens crown, and the second protruding portion is tapered along the cross section perpendicular to the length direction of the second protruding portion in the direction along the lens base toward the lens crown. Light can be emitted from the first protruding part and the second protruding part after being emitted into the light guide plate of the structure, and the light guide plate has a larger visual angle.

As shown in fig. 1 to 9, the light guide plate provided in this embodiment further has a reflective surface disposed between two adjacent first protruding portions, and the reflective surface is adapted to reflect light emitted between two adjacent first protruding portions back into the mirror body. Because the gap is arranged between the adjacent first protruding parts, the light rays emitted from the gap can greatly reduce the light ray utilization rate, and the light guide plate with the structure can reflect the light rays back to the light guide plate for reuse after the light rays are emitted to the gap by arranging the reflecting surface in the gap, so that the light ray utilization rate of the light guide plate with the structure is greatly improved.

Example 2

The embodiment provides a backlight assembly, as shown in fig. 1 to 9, including a back plate, a panel, a support, a composite film, a reflecting member and the light guide plate, wherein the panel and the back plate are respectively arranged at two ends of the support and jointly enclose into a containing cavity, the light guide plate is arranged in the containing cavity, the reflecting member is paved between the light guide plate and the back plate, the reflecting member is suitable for reflecting light emitted to the reflecting member back into the light guide plate, and the composite film is paved at one end of the light guide plate close to the panel. In addition, the light source device also comprises a light source piece and a substrate which are arranged in the accommodating cavity, wherein the light source piece is electrically connected with the substrate, and the substrate is suitable for being electrically connected with an external power supply.

The backlight assembly of this structure is through setting up the first bellying that a plurality of parallel intervals set up on the mirror crown surface to set up the second bellying that a plurality of parallel intervals set up on first bellying surface, can make the light that is in the mirror body to the mirror crown after the first refraction of first bellying, get into the second bellying and carry out the second refraction again, increased the divergence degree of light behind the backlight assembly of light having passed this structure, thereby improved this backlight assembly and adopted the visual angle of the display device of this backlight assembly.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a light guide plate, its characterized in that includes mirror body, mirror crown and mirror seat, the mirror crown with the mirror seat is located on the both ends face of mirror body respectively, the mirror crown includes a plurality of parallel interval arrangement's first bellying, still have on the first bellying along the parallel interval arrangement's in first bellying surface second bellying, the length direction of first bellying is first direction, the length direction of second bellying is the second direction, first direction with the second direction is parallel.

2. The light guide plate of claim 1, wherein the lens mount comprises a plurality of spaced apart recesses.

3. The light guide plate of claim 2, wherein the lens base comprises a plurality of parallel spaced depressions.

4. A light guide plate according to claim 3, wherein the length direction of the recess is a third direction, and the third direction is disposed at an angle to the first direction.

5. The light guide plate of claim 4, wherein the third direction is perpendicular to the first direction.

6. The light guide plate according to claim 5, wherein the concave portion is tapered in a direction along the lens base toward the crown along a cross section perpendicular to a length direction thereof.

7. The light guide plate according to claim 1, wherein the first convex portion is tapered in a direction along the lens base toward the crown along a cross section perpendicular to a length direction thereof; and/or the number of the groups of groups,

8. The light guide plate of claim 1, wherein the mirror further comprises a reflective surface disposed between two adjacent first protrusions, the reflective surface being adapted to reflect light directed between two adjacent first protrusions back into the mirror.

9. A backlight assembly, characterized by comprising a back plate, a panel, a support, a composite film, a reflecting member and the light guide plate according to any one of claims 1 to 8, wherein the panel and the back plate are respectively arranged at two ends of the support and jointly enclose to form a containing cavity, the light guide plate is arranged in the containing cavity, the reflecting member is laid between the light guide plate and the back plate, the reflecting member is suitable for reflecting light emitted to the reflecting member back into the light guide plate, and the composite film is laid at one end of the light guide plate close to the panel.

10. The backlight assembly of claim 9, further comprising a light source member mounted in the receiving cavity and a substrate, the light source member being electrically connected to the substrate, the substrate being adapted to be electrically connected to an external power source.