CN219085174U - A light guide plate and backlight assembly - Google Patents

Abstract

The utility model discloses a light guide plate and a backlight assembly. The light guide plate includes a mirror body, a mirror crown and a mirror seat. The mirror crown and the mirror seat are respectively arranged on the two ends of the mirror body. The mirror crown includes A plurality of first protrusions arranged at intervals in parallel, on the first protrusions there are second protrusions arranged at intervals in parallel along the surface of the first protrusions, the length direction of the first protrusions is the first direction, the length direction of the second protrusion is the second direction, and the first direction is parallel to the second direction. The light guide plate of this structure is provided with a plurality of first protrusions arranged in parallel at intervals on the surface of the mirror crown, and a plurality of second protrusions arranged in parallel at intervals on the surface of the first protrusions, so that the light emitted from the mirror body to the After being refracted for the first time by the first raised part, the light of the mirror crown enters the second raised part and undergoes the second refraction, thereby improving the viewing angle of the light guide plate and the display device using the light guide plate .

Description

A 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 technique

Liquid crystal display is an active matrix liquid crystal display driven by thin film transistors. It mainly uses current to stimulate liquid crystal molecules to generate points, lines, and surfaces to form a picture with the back lamp tube. Its working principle is that under the action of an electric field, the alignment direction of the liquid crystal molecules is changed to change the light transmittance of the external light source to complete the electro-optic conversion, and then use the different excitations of the R, G, and B three primary color signals to pass the red , green and blue three primary color filter films to complete the color reproduction in time domain and space domain.

The viewing angle of the liquid crystal display is limited by the viewing angle of the LCD screen. When the viewing angle needs to be increased, one method is to increase the viewing angle by adding a full-view light compensation film on the surface of the LCD screen. This not only requires a lot of cost, but also increases the viewing angle. Moreover, there will be a problem of non-conforming fit when artificially fitting.

Another method is to add a high-gain optical compensation film to the backlight module. This film is also very expensive and difficult to assemble, and it is easy to cause waste due to assembly errors.

Utility model content

Therefore, the technical problem to be solved by the utility model is that the viewing angle of the liquid crystal screen in the prior art is relatively small, which leads to the defect that the viewing angle of the display using this liquid crystal screen is relatively small.

To this end, the utility model provides a light guide plate, including a mirror body, a mirror crown and a mirror base, the mirror crown and the mirror base are separately arranged on the two ends of the mirror body, and the mirror crown includes a number of parallel intervals The first protruding part is provided, and the first protruding part also has second protruding parts arranged in parallel and spaced along the surface of the first protruding part, and the length direction of the first protruding part is the first direction, the length direction of the second protrusion is the second direction, and the first direction is parallel to the second direction.

Optionally, in the above-mentioned light guide plate, the mirror base includes several recesses arranged at intervals.

Optionally, in the above-mentioned light guide plate, the mirror base includes a plurality of parallel and spaced concave portions.

Optionally, in the above-mentioned light guide plate, the length direction of the recessed portion is a third direction, and the third direction is set at an included angle with the first direction.

Optionally, in the above light guide plate, the third direction is perpendicular to the first direction.

Optionally, in the above-mentioned light guide plate, the section of the concave portion perpendicular to its length direction is tapered in a direction along the mirror base toward the mirror crown.

Optionally, in the above-mentioned light guide plate, the section of the first raised portion perpendicular to its length direction is tapered in a direction along the mirror base toward the mirror crown; and/or,

The section perpendicular to the length direction of the second protruding portion is tapered in a direction along the mirror base toward the mirror crown.

Optionally, in the above-mentioned light guide plate, the mirror body further has a reflective surface, the reflective surface is arranged between two adjacent first protrusions, and the reflective surface is suitable for directing the The light between the first protrusions is reflected back into the mirror body.

A backlight assembly, including a backplane, a panel, a bracket, a composite film, a reflector, and the above-mentioned light guide plate, the panel and the backplane are separately arranged at both ends of the bracket, and together form an accommodation cavity, the The light guide plate is arranged in the accommodation cavity, the reflector is laid between the light guide plate and the back plate, and the reflector is suitable for reflecting the light directed at the reflector back to the guide In the light panel, the composite film is laid on the end of the light guide plate close to the panel.

Optionally, the above-mentioned backlight assembly further includes a light source component and a substrate installed in the accommodating cavity, the light source component is electrically connected to the substrate, and the substrate is adapted to be electrically connected to an external power supply.

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

1. The light guide plate provided by the utility model includes a mirror body, a mirror crown and a mirror base. The mirror crown and the mirror base are respectively arranged on both ends of the mirror body. The protruding portion also has second protruding portions arranged in parallel and at intervals along the surface of the first protruding portion, the length direction of the first protruding portion is the first direction, the length direction of the second protruding portion is the second direction, and the second protruding portion is One direction is parallel to the second direction.

The light guide plate of this structure, by setting a plurality of first protrusions arranged in parallel and at intervals on the surface of the mirror crown, and arranging a plurality of second protrusions arranged in parallel and at intervals on the surface of the first protrusion, can make the light emitted by the mirror body After the first refraction of the light to the crown of the mirror, it enters the second protruding part and undergoes a second refraction, which increases the degree of divergence of the light after passing through the light guide plate of this structure. Therefore, the viewing angle of the light guide plate and the display device using the light guide plate is improved.

2. In the light guide plate provided by the utility model, the mirror base includes several recesses arranged at intervals. The light guide plate with this structure is provided with several spaced recesses on the mirror base, so that light can be absorbed and scattered when passing through the recesses when entering the light guide plate from the outside, and the utilization rate of light by the light guide plate is enlarged, thereby improving the light guide plate. The display brightness of the light plate, or in other words, when the light guide plate using this structure needs to achieve the same brightness as the light guide plate in the prior art, only lower power consumption is required, which saves resource consumption.

3. In the light guide plate provided by the present invention, the third direction is perpendicular to the first direction. Since the light guide plate of this structure adopts the first protrusions arranged along the first direction and the second protrusions arranged along the second direction, this only improves the display effect perpendicular to the first direction, but The display effect along the first direction depends on the arrangement structure of the light sources. The light guide plate with this structure provides a concave portion perpendicular to the first direction, so that the light will have a scattering effect perpendicular to the third direction after entering the concave portion, thereby making up for the insufficient display effect of the light guide plate in the first direction. The disadvantages further improve the display effect of the light guide plate.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

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

Fig. 2 is the enlarged view of place A in Fig. 1;

3 is a cross-sectional view of the backlight assembly provided in Embodiment 2 of the present invention after being rotated by 90 degrees;

4 is an axonometric view of the light guide plate provided in Embodiment 1 of the present invention;

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 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 the backlight assembly provided in Embodiment 2 of the present invention;

Explanation of reference signs:

1-light guide plate; 11-mirror body; 12-mirror crown; 121-first raised part; 122-second raised part; 13-mirror seat; 131-depressed part;

2 - Backplane;

3-panel;

4 - bracket;

5- Composite film.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example 1

This embodiment provides a light guide plate, as shown in Figures 1 to 9, including a mirror body, a mirror crown, and a mirror base, the mirror crown and the mirror base are separately arranged on the two ends of the mirror body, and the mirror crown includes a number of parallel and spaced settings. The first protruding part, the first protruding part also has the second protruding part arranged in parallel and spaced along the surface of the first protruding part, the length direction of the first protruding part is the first direction, and the second protruding part The lengthwise direction is the second direction, and the first direction is parallel to the second direction.

The light guide plate of this structure, by setting a plurality of first protrusions arranged in parallel and at intervals on the surface of the mirror crown, and arranging a plurality of second protrusions arranged in parallel and at intervals on the surface of the first protrusion, can make the light emitted by the mirror body After the first refraction of the light to the crown of the mirror, it enters the second protruding part and undergoes a second refraction, which increases the degree of divergence of the light after passing through the light guide plate of this structure. Therefore, the viewing angle of the light guide plate and the display device using the light guide plate is improved.

In the light guide plate provided in this embodiment, as shown in FIG. 6 and FIG. 8 , the mirror base includes several recesses arranged at intervals. The light guide plate with this structure is provided with several spaced recesses on the mirror base, so that light can be absorbed and scattered when passing through the recesses when entering the light guide plate from the outside, and the utilization rate of light by the light guide plate is enlarged, thereby improving the light guide plate. The display brightness of the light plate, or in other words, when the light guide plate using this structure needs to achieve the same brightness as the light guide plate in the prior art, only lower power consumption is required, which saves resource consumption. Specifically, in this embodiment, the mirror base includes several recesses arranged at intervals.

In the light guide plate provided by this embodiment, as shown in FIG. 2 , the length direction of the concave portion is the third direction, and the third direction is set at an included angle with the first direction. Since the light guide plate of this structure adopts the first protrusions arranged along the first direction and the second protrusions arranged along the second direction, this only improves the display effect perpendicular to the first direction, but The display effect along the first direction depends on the arrangement structure of the light sources. The light guide plate of this structure can make at least part of the light scattered perpendicular to the third direction after the light enters the recess by setting the recessed part at an angle with the first direction, thus making up for the display of the light guide plate in the first direction. The disadvantage of insufficient effect further improves the display effect of the light guide plate. Preferably, the third direction is perpendicular to the first direction. The light guide plate with this structure provides a concave portion perpendicular to the first direction, so that the light will have a scattering effect perpendicular to the third direction after entering the concave portion, thereby making up for the insufficient display effect of the light guide plate in the first direction. The disadvantages further improve the display effect of the light guide plate.

For the light guide plate provided in this embodiment, as shown in FIGS. 1 to 9 , the recessed portion is tapered along a section perpendicular to its length direction along the direction from the mirror base to the mirror crown. The tapered concave portion can have the smallest bottom area while having a large light inlet. The concave portion of this structure can increase the absorption and scattering efficiency of light, so that the light guide plate and the light guide plate can be used. The display device of the light panel has better display brightness and display effect.

For the light guide plate provided in this embodiment, as shown in Figure 2, the first raised portion is tapered along the section perpendicular to its length direction along the direction along the mirror base toward the mirror crown, and the second raised portion is set along a section perpendicular to the direction of the mirror crown. The cross-section in the length direction is tapered along the mirror base toward the mirror crown. After the light enters the light guide plate of the structure, it can exit from the first raised portion and the second raised portion, which has a larger viewing angle.

The light guide plate provided by this embodiment, as shown in Figures 1 to 9, the mirror body also has a reflective surface, the reflective surface is arranged between two adjacent first protrusions, and the reflective surface is suitable for directing the light to the adjacent two The light between the first protrusions is reflected back into the mirror body. Since there is a gap between the adjacent first protrusions, the light emitted from the gap will greatly reduce the utilization rate of the light. The light guide plate of this structure can set the reflective surface in the gap, so that the light can be emitted to the gap and be absorbed. The light is reflected back to the light guide plate for reuse, which greatly improves the light utilization rate of the light guide plate with this structure.

Example 2

This embodiment provides a backlight assembly, as shown in Figures 1 to 9, including a backplane, a panel, a bracket, a composite film, a reflector, and the above-mentioned light guide plate, and the panel and the backplane are separately arranged at both ends of the bracket, and the common Enclosed into a cavity, the light guide plate is placed in the cavity, the reflector is laid between the light guide plate and the back plate, the reflector is suitable for reflecting the light directed at the reflector back into the light guide plate, and the composite film is laid on the light guide plate. The light board is near one end of the panel. In addition, it also includes a light source component installed in the cavity and a substrate, the light source component is electrically connected to the substrate, and the substrate is suitable for electrical connection with an external power supply.

In the backlight assembly of this structure, by arranging a plurality of first protrusions arranged in parallel and at intervals on the surface of the mirror crown, and arranging a plurality of second protrusions arranged in parallel and at intervals on the surface of the first protrusion, it is possible to make the light emitted from the center of the mirror body After the first refraction of the light to the crown of the mirror, it enters the second protruding part and undergoes the second refraction, which increases the degree of divergence of the light after passing through the backlight assembly of this structure. Therefore, the viewing angle of the backlight assembly and the display device using the backlight assembly is improved.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. A light guide plate, characterized in that it comprises a mirror body, a mirror crown and a mirror seat, the mirror crown and the mirror seat are separately arranged on the two end surfaces of the mirror body, and the mirror crown includes several parallel spaced arrangements The first protruding portion, the first protruding portion also has second protruding portions arranged in parallel and spaced along the surface of the first protruding portion, the length direction of the first protruding portion is the first direction , the length direction of the second protrusion is the second direction, and the first direction is parallel to the second direction. 2 . The light guide plate according to claim 1 , wherein the mirror base comprises several recesses arranged at intervals. 3 . The light guide plate according to claim 2 , wherein the mirror base comprises several parallel and spaced concave portions. 4 . 4 . The light guide plate according to claim 3 , wherein the longitudinal direction of the concave portion is a third direction, and the third direction is set at an included angle with the first direction. 5. The light guide plate according to claim 4, wherein the third direction is perpendicular to the first direction. 6 . The light guide plate according to claim 5 , wherein, along a section perpendicular to the length direction of the recessed portion, the concave portion is tapered in a direction along the mirror base toward the mirror crown. 7 . 7. The light guide plate according to claim 1, characterized in that, the section of the first raised portion perpendicular to its length direction is tapered in a direction along the mirror base toward the mirror crown; and / or, The section perpendicular to the length direction of the second protruding portion is tapered in a direction along the mirror base toward the mirror crown. 8. The light guide plate according to claim 1, wherein the mirror body further has a reflective surface, the reflective surface is arranged between two adjacent first protrusions, and the reflective surface is suitable for The light rays directed between two adjacent first protrusions are reflected back into the mirror body. 9. A backlight assembly, characterized in that it comprises a backplane, a panel, a bracket, a composite film, a reflector, and the light guide plate described in any one of claims 1-8, and the panel and the backplane are separately arranged on The two ends of the bracket are jointly enclosed to form an accommodating cavity, the light guide plate is arranged in the accommodating cavity, the reflector is laid between the light guide plate and the back plate, and the reflector The composite film is suitable for reflecting light directed towards the reflector back into the light guide plate, and the composite film is laid on an end of the light guide plate close to the panel. 10. The backlight assembly according to claim 9, further comprising a light source element and a substrate installed in the accommodating cavity, the light source element is electrically connected to the substrate, and the substrate is adapted to External power supply electrical connection.

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