CN221303766U

CN221303766U - Light-emitting component, direct type backlight module and display device

Info

Publication number: CN221303766U
Application number: CN202323152553.2U
Authority: CN
Inventors: 齐杰
Original assignee: Huizhou Shiwei New Technology Co Ltd
Current assignee: Huizhou Shiwei New Technology Co Ltd
Filing date: 2023-11-21
Publication date: 2024-07-09
Anticipated expiration: 2033-11-21

Abstract

The application provides a light-emitting component, a direct type backlight module and a display device, wherein the light-emitting component comprises a light source; a lens including an incident light side and a reflecting side disposed opposite to each other, and an emergent light side connected between the incident light side and the reflecting side; the light source is covered on the light incident side; the light source is arranged on the light emitting side, and the light source is arranged on the light emitting side. The Fresnel structure is arranged on the reflecting side of the luminous component, so that a curved surface for reflection is reserved, the distance of light in the lens along the straight line is reduced, the thickness of the lens is reduced while the brightness of the lens is ensured, the material is saved, the production cost is reduced, the overall thickness of the luminous component is reduced, and the occupied space is reduced.

Description

Light-emitting component, direct type backlight module and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a light-emitting assembly, a direct type backlight module and a display device.

Background

Currently, as a common display device, a liquid crystal panel of the liquid crystal display cannot directly emit light, and a backlight module is required to provide a light source.

The backlight module mainly comprises a light source and a lens, wherein a reflecting side opposite to the light source is arranged in the lens, light rays emitted by the light source are reflected to a light emitting side by the reflecting side, in the prior art, a conical surface or a spherical surface is often adopted as a structure of the reflecting side, and the whole thickness of the lens is thicker, so that the production cost is higher.

Disclosure of utility model

The embodiment of the application provides a light-emitting component, a direct type backlight module and a display device, which are used for solving the problems of thicker thickness and higher production cost of the existing lens.

An embodiment of the present application provides a light emitting assembly, including:

a light source;

A lens including an incident light side and a reflecting side disposed opposite to each other, and an emergent light side connected between the incident light side and the reflecting side; the light source is covered on the light incident side;

The light source is arranged on the light emitting side, and the light source is arranged on the light emitting side.

Optionally, the light entrance side of the lens is configured to change a transmission direction of light rays of the light source, so as to deflect the light rays of the light source towards the fresnel structure.

Optionally, the middle part of the Fresnel structure is provided with a tooth-shaped structure, and the surface of the tooth-shaped structure close to the center of the lens is used for reflecting light rays

Optionally, the lens further comprises a substrate arranged on one side of the lens; and a groove is formed in one side of the substrate, facing the lens, and the light source is arranged in the groove.

Optionally, a cavity recessed inwards is formed on one side of the lens facing the substrate, the light source is arranged in the cavity, and the lens surrounds the inside of the cavity to form the light incident side.

Optionally, the refractive index of the lens is greater than the refractive index of air.

Optionally, a first reflective layer is disposed on a side of the fresnel structure facing away from the light incident side, and the first reflective layer is configured to reflect light irradiated onto the fresnel structure to the light emergent side.

Optionally, a second reflective layer is arranged on the substrate towards the light incident side, and the cavity covers the second reflective layer;

The second reflecting layer is suitable for reflecting the light rays irradiated onto the second reflecting layer by the light source to the light incident side.

The embodiment of the application also provides a direct type backlight module, which comprises:

An outer frame;

the light emitting assembly is arranged in the outer frame.

The embodiment of the application also provides a display device, which comprises:

A display panel;

the direct type backlight module provides a light source for the display panel.

The Fresnel structure of the light-emitting component provided by the embodiment of the application consists of a plurality of discontinuous curved surfaces with the same curvature, which is equivalent to combining a plurality of prisms with coincident focuses according to annular arrangement, and the curved surfaces for reflection are reserved to reduce the distance of light in the lens along a straight line, so that the brightness of the lens is ensured, the thickness of the lens is reduced, the material is saved, the production cost is reduced, the integral thickness of the light-emitting component is reduced, and the occupied space is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.

Fig. 1 is a schematic view of a lens with a conical reflecting surface in the prior art.

Fig. 2 is a schematic diagram illustrating formation of a light emitting device according to the present application.

Fig. 3 is a schematic structural diagram of a light emitting device according to the present application.

Fig. 4 is a schematic diagram illustrating light path propagation of a light emitting device according to the present application.

Fig. 5 is a top view of a light emitting assembly provided by the present application.

Reference numerals illustrate:

1. A light source; 2. a lens; 21. a light incident side; 22. a reflection side; 23. a light-emitting side; 24. a cavity; 3. a substrate; 31. a groove; 32. pins.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

The embodiment of the application provides a light-emitting component, a direct type backlight module and a display device, which are used for solving the problems of thicker thickness and higher production cost of the existing lens, and are described below with reference to the accompanying drawings.

Referring to fig. 3 and 5, fig. 3 is a schematic structural diagram of a light emitting assembly provided by the embodiment of the application, and fig. 5 is a top view of the light emitting assembly provided by the application. The light emitting assembly provided by the embodiment of the application comprises: a light source 1; a lens 2 including an incident light side 21 and a reflecting side 22 disposed opposite to each other, and an outgoing light side 23 connected between the incident light side 21 and the reflecting side 22; the light incident side 21 is covered with the light source 1; referring to fig. 4, fig. 4 is a schematic diagram illustrating light path propagation of the light emitting assembly provided by the present application, at least a portion of light emitted by the light source 1 is conducted to the reflecting side 22 through the light incident side 21, and is reflected to the light emitting side 23 by the fresnel structure of the reflecting side 22.

The Fresnel structure is composed of a plurality of discontinuous curved surfaces with the same curvature, and is equivalent to combining a plurality of prisms with coincident focuses according to annular arrangement, and the distance of light in the lens 2 along straight lines is reduced by reserving the curved surfaces for reflection, so that the thickness of the lens 2 is reduced while the brightness of the lens 2 is ensured, the material is saved, the production cost is reduced, the overall thickness of the light-emitting assembly is reduced, and the occupied space is reduced. In addition, the thickness of the whole lens 2 is reduced due to the fresnel structure, so that the propagation distance of light rays in the lens 2 is shortened, the attenuation rate of the light rays in the lens 2 is reduced, the brightness of the light emitting side 23 is improved, a good condensing effect is achieved, and the phenomenon that the light rays at the corner positions are easy to darken or blur is avoided.

It should be noted that, the fresnel structure of the reflecting side 22 in the present application may be based on the existing conical surface reflecting structure shown in fig. 1, as shown in fig. 2, by cutting the existing conical surface reflecting structure with a plurality of sleeves with different thicknesses and different heights, and then sleeving a plurality of annular rotators (as shown in the shaded portion in fig. 2) obtained after cutting, so as to obtain the fresnel structure of the reflecting side 22 in the present application, which has better brightness, reduces the use of optical materials, reduces the production cost, reduces the thickness of the lens 2, reduces the space occupation rate of the device, and finally avoids the whole color coordinate floating caused by the screen parameters.

Optionally, the light incident side of the lens is configured to change a transmission direction of the light source, so as to deflect the light of the light source toward the fresnel structure, and further expand an irradiation range of the light source 1, so that the light of the light source 1 is transmitted to each portion of the fresnel structure. I.e. the light is refracted at the light entrance side 21, and the irradiation range is further enlarged.

Optionally, the middle part of the fresnel structure has a tooth-like structure, and a face of the tooth-like structure near the center of the lens is used for reflecting light. Specifically, the fresnel structure includes from the center of lens 2 to a plurality of annular structures that distribute in proper order in the edge, every annular structure's cross-sectional area is to deviating from the direction of income light side 21 reduces gradually, and specifically, every annular structure is all to deviating from the direction of income light side 21 is equipped with sharp tooth, and one sharp tooth is towards the face at lens center is a reflecting surface, the reflecting surface is kept away from the direction of income light side 21 is from the center of lens 2 to the slope of edge, and a plurality of reflecting surface's focus coincidence, and a plurality of sharp tooth's thickness is followed the center of lens is to the direction of edge diminishes gradually. The more densely the annular structure is distributed, the more uniform the light reflected by the Fresnel structure is, and the better the effect is.

Optionally, the light emitting assembly provided by the embodiment of the present application further includes a substrate 3 disposed on one side of the lens 2; the light source 1 is arranged on the side of the substrate 3 facing the lens 2. By providing the substrate 3, a mounting space is provided for the light source 1. The shape of the substrate 3 is not further limited here.

Optionally, the substrate 3 is provided with a recess 31 towards the light entrance side 21, and the light source 1 is arranged in the recess 31. Further, the light source 1 may be glued in the recess 31, for example the light source 1 is glued in the recess 31 by means of 3M glue, hot melt glue or the like. By arranging the groove 31, the direction of the light path of the light source 1 can be constrained, and the light emitted by the light source 1 is emitted to the fresnel structure as much as possible due to the shielding of the groove wall of the groove 31, so that the light of the light source 1 is prevented from being directly emitted to the light emitting side 23 of the lens 2.

Optionally, a cavity 24 recessed inwards is provided on a side of the lens 2 facing the substrate 3, the light source 1 is disposed in the cavity 24, and the lens surrounds the cavity to form the light incident side 21. Further, the groove 31 may correspond to the center of the cavity 24, so that the light emitted by the light source 1 may uniformly reach each position of the light incident side 21 through the cavity 24, so that the light of the light incident side 21 of the lens 2 is more uniform.

By providing the cavity 24 between the light entrance side 21 and the light source 1, light is refracted at the light entrance side, the illumination range is enlarged through the light entrance side and the light is directed to the fresnel structure.

The light incident side 21 may be a conical surface, and the sharp corners of the conical surface are rounded, which is not limited herein, and as a specific embodiment, the cavity 24 may be a cone and a column that are mutually communicated, where the sharp corners of the cone are rounded; as a specific embodiment, the cavity 24 may be a cone, where corners of the cone are rounded. The dimensions of the cavity 24 are not limited further, and the light source 1 may be covered.

Optionally, a plurality of pins 32 are disposed on a side of the substrate 3 facing away from the lens 2, and the plurality of pins 32 are distributed on the substrate 3 at intervals, and further, the plurality of pins 32 are distributed on the substrate 3 at intervals in a ring shape. One end of each of the pins 32 is electrically connected with the light source 1, and the other end is suitable for being connected with a power supply.

Optionally, the refractive index of the lens 2 is greater than the refractive index of air. Specifically, the lens 2 may be made of acrylic material (polymethyl methacrylate, polymethacrylate, PMMA); as an alternative embodiment, the lens 2 may be made of Polycarbonate (PC); as an alternative embodiment, the lens 2 may be made of polystyrene (Polystyrene, PS); as an alternative embodiment, the lens 2 may be made of polypropylene (PP).

Further, an inorganic or organic light diffusing agent may be added to the lens 2 to generate an optical diffusion effect.

Optionally, the light source 1 includes a lamp strip and a plurality of lamp pearls that set up on the lamp strip, a plurality of the lamp pearl interval sets up on the lamp strip, further, a plurality of the lamp pearl evenly distributed is in on the lamp strip. The type of the lamp beads is not further limited here. Specifically, the light strip is adhered to the groove 31, and a plurality of the light beads are adhered to the light strip. One end of the lamp strip is connected with a plurality of pins 32, and the other end is connected with a plurality of lamp beads.

Optionally, a first reflective layer is disposed on a side of the fresnel structure facing away from the light incident side 21, and the first reflective layer is configured to reflect light irradiated onto the fresnel structure to the light emergent side 23.

The structure of the light-emitting side 23 is not further limited here, and the specific shape of the light-emitting side 23 may be designed according to specific needs. As a specific embodiment, the light emitting side 23 may be a cylindrical rotation surface and a bowl rotation surface that are connected to each other, and connected between the light incident side 21 and the reflecting side 22; as another specific embodiment, the light emitting side 23 may be a bowl-shaped rotation surface, and is connected between the light incident side 21 and the reflecting side 22; as another specific embodiment, the light emitting side 23 may be a cylindrical rotation surface, and is connected between the light incident side 21 and the reflecting side 22.

Optionally, a second reflective layer is disposed on the substrate 3 facing the light incident side 21, and the cavity 24 covers the second reflective layer; the second light reflecting layer is adapted to reflect light rays irradiated by the light source 1 onto the second light reflecting layer to the light entrance side 21.

The embodiment of the application also provides a direct type backlight module, which comprises: an outer frame; the light emitting assembly is arranged in the outer frame.

Optionally, the direct type backlight module further includes a diffusion plate, where the diffusion plate is located on the light emitting side 23 of the light emitting assembly, and a certain interval is disposed between the diffusion plate and the light emitting side 23, and the interval is not limited further, and further parameter selection can be performed according to specific light emitting requirements.

The embodiment of the application also provides a display device, which comprises: a display panel; the direct type backlight module provides illumination for the display panel.

The display device provided by the embodiment of the application can be a flat panel display device or a cambered surface display device, and the specific structural shape of the display device is not particularly limited in the embodiment. The host of the display device may be integrated with the display screen or separately provided, and the display device may be provided on a platform such as a desktop or the like, or may be provided on a vertical installation surface such as a wall in a hanging manner, which is not particularly limited in this embodiment. In addition, the display device in this embodiment may be applied to different fields and occasions such as home display devices, commercial display devices, vehicle-mounted display devices, and industrial display devices, and specifically may be display devices such as mobile phones, computers, televisions, commercial display screens, and navigators, which are not limited in this embodiment.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.

The light emitting assembly, the direct type backlight module and the display device provided by the embodiment of the application are described in detail, and specific examples are applied to the description of the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the present description should not be construed as limiting the present application in summary.

Claims

1. A light emitting assembly, comprising:

a light source;

2. The lighting assembly of claim 1 wherein the light entrance side of the lens is configured to change a direction of transmission of light rays of the light source to deflect the light rays of the light source toward the fresnel structure.

3. The lighting assembly of claim 1 wherein the middle portion of the fresnel structure has a tooth structure, the tooth structure being adjacent a face of the lens center for reflecting light.

4. The light assembly of claim 1, further comprising a substrate disposed on one side of the lens; and a groove is formed in one side of the substrate, facing the lens, and the light source is arranged in the groove.

5. The light assembly of claim 4, wherein the lens has an inwardly recessed cavity on a side facing the substrate, the light source is disposed in the cavity, and the lens surrounds the cavity to form the light entrance side.

6. The light assembly of claim 1 wherein the refractive index of the lens is greater than the refractive index of air.

7. The lighting assembly according to claim 1, wherein a side of the fresnel structure facing away from the light entrance side is provided with a first light reflecting layer for reflecting light impinging on the fresnel structure to the light exit side.

8. The light emitting assembly of claim 5, wherein a second light reflecting layer is disposed on the substrate toward the light incident side, and the cavity is covered with the second light reflecting layer;

9. The utility model provides a straight following formula backlight unit which characterized in that includes:

An outer frame;

the light emitting assembly of any one of claims 1-8 disposed within the housing.

10. A display device, comprising:

A display panel;

the direct type backlight module of claim 9, wherein the light source is provided for the display panel.