WO2020093900A1

WO2020093900A1 - Display module and display device

Info

Publication number: WO2020093900A1
Application number: PCT/CN2019/113702
Authority: WO
Inventors: 罗晓
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2018-11-05
Filing date: 2019-10-28
Publication date: 2020-05-14
Also published as: CN208795982U

Abstract

A display module (100) and a display device. The display module (100) comprises a back plate (1), a light source (2), and a light guide plate (3); the back plate (1) is provided with an accommodation recess (11); a reflective surface (12) is formed on a side wall of said recess (11); the light guide plate (3) is accommodated in the accommodation recess (11); an incident light surface (31) is formed on the side of the light guide plate (3) facing away from the reflective surface (12); an emergent light surface (32) is formed on the side of the light guide plate (3) facing away from the bottom wall of the accommodation recess (11); the light source (2) is arranged in the accommodation recess (11), and is disposed adjacent to the incident light surface (31) of the light guide plate (3).

Description

Display module and display device The

Related application

This application requires the priority of the Chinese patent application with the application number 201821813255.X and the name "display module and display device", which was applied on November 5, 2018, and the full text of which is hereby incorporated by reference. The

Technical field

The present application relates to the field of display technology, in particular to a display module and a display device using the display module.

Background technique

The traditional liquid crystal display is mainly composed of a liquid crystal panel, a backlight module, a housing and a circuit board. The main parts of the backlight module are an optical film, a light guide plate, a light source, a reflection sheet and a back plate. The function of the reflection sheet is mainly to prevent the light emitted by the light source from being exposed from the back of the backlight module, and to reflect the light source so that it can focus and project toward the liquid crystal panel, thereby improving the utilization rate of the light source. In addition, the backlight module can be divided into two types of side entry type and direct type according to the setting of the light entrance surface. In order to improve the utilization rate of the light source, the side entry type backlight module usually needs to be provided with a reflective sheet on the opposite side , Resulting in a complex structure and inconvenient processing.

Application content

The main purpose of the present application is to provide a display module, which aims to provide a display module with a simple structure, low cost and light weight.

To achieve the above purpose, the display module proposed in this application includes:

A back plate, the back plate is provided with a containing groove, and a reflecting surface is formed on one side wall of the containing groove;

A light guide plate is accommodated in the containing groove, a side of the light guide plate facing away from the reflecting surface has a light incident side surface, and a side of the light guide plate facing away from the bottom wall of the containing groove has a light exit surface; as well as

A light source is accommodated in the containing groove and is disposed adjacent to the light incident side of the light guide plate, the light source enters light from the light incident side and exits from the light exit surface, and the reflection surface reflects through The light from the light guide plate is emitted from the light exit surface.

The present application also proposes a display device including a display module, and the display module is the above-mentioned display module.

The display module proposed by the technical solution of the present application includes a back plate, a light source, and a light guide plate, wherein the back plate is provided with a receiving groove, and a side wall of the receiving groove is formed with a reflective surface; the light guide plate is accommodated in the receiving groove, and the light guide plate is backed A light incident side is formed on the side facing the reflective surface, and a light exit surface is formed on the side of the light guide plate facing away from the bottom wall of the receiving groove; the light source is provided in the receiving groove and is adjacent to the light incident side of the light guide plate. The incident light is emitted from the light exit surface, and the reflection surface reflects the light passing through the light guide plate and exits from the light exit surface. In this application, a reflective surface is formed on the back plate, and the reflective surface of the back plate is used to directly reflect light, thereby improving the light utilization rate, while avoiding the provision of a reflective sheet on the back plate, and reducing costs. The display module of the present application has a simple structure and realizes the lightness of the display module.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained according to the structures shown in these drawings.

FIG. 1 is a schematic cross-sectional view of an embodiment of a display module of the present application.

Description of Drawing Symbols:

Label	name	Label	name
100	Display module	4	A reflective sheet
1	Backplane	5	Display panel
11	Containment slot	6	Screen sealant
12	Reflective surface	7	Plastic frame
13	Carrier	71	Extension
131	Positioning groove	72	Connection
132	Raised	8	Optical diaphragm
2	light source	81	Diffuser
3	Light guide plate	82	Brightener
31	Incident side	9	PCB board
32	Light side

The implementation, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments and with reference to the drawings.

detailed description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only set to explain the inter-components in a certain posture (as shown in the drawings) With respect to the relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication changes accordingly.

In this application, unless otherwise clearly specified and limited, the terms "connected", "fixed", etc. should be understood in a broad sense, for example, "fixed" may be a fixed connection, a detachable connection, or integrated; It is a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediary. It can be the connection between two elements or the interaction between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In addition, descriptions related to "first", "second", etc. in this application are only set for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this application.

This application proposes a display module 100.

Referring to FIG. 1, a display module 100 according to an embodiment of the present application includes:

The back plate 1, the back plate 1 is provided with a containing groove 11, and a reflecting surface 12 is formed on one side wall of the containing groove 11;

The light guide plate 3 is accommodated in the accommodating groove 11, the light guide plate 3 has a light incident side surface 31 on the side facing away from the reflecting surface 12, and the light guide plate 3 has a light exit surface 32 on the side facing away from the bottom wall of the accommodating groove 11;

The light source 2 is accommodated in the accommodating groove 11 and is disposed adjacent to the light entrance side 31 of the light guide plate 3. The light source 2 enters light from the light entrance side 31 and exits from the light exit surface 32, and the reflection surface 12 reflects the light passing through the light guide plate 3 The light is emitted from the light exit surface 32.

In this embodiment, a side wall of the receiving groove 11 forms a reflective surface 12, the light source 2 enters light from the light incident side surface 31, and part of the light passes through the light guide plate 3 to the reflective surface 12, and the reflective surface 12 reflects the light The light exiting from the light exit surface 32 improves the light utilization rate and avoids the waste of resources. In addition, by forming the reflective surface 12 on the back plate 1, the reflective surface 12 of the back plate 1 directly reflects light, which improves the light utilization rate, and at the same time avoids the provision of the reflective sheet 4 on the back plate 1, reducing the cost. The display module 100 of the present application has a simple structure and realizes the lightness of the display module 100.

In this embodiment, preferably, the reflectivity of the reflecting surface 12 is greater than or equal to 96.2%.

Reflectance indicates the ability of an object to reflect light. The reflectivity of the reflecting surface is greater than or equal to 96.2%, which can completely reflect the light emitted by the light guide plate, thereby improving the light utilization rate. Of course, in this embodiment, when the reflectivity of the side wall of the containing groove 11 is greater than or equal to 96.2%, the side wall of the containing groove 11 is used to directly reflect light, and it is not necessary to provide a side reflecting sheet 4, which not only simplifies the production process, but also reduce manufacturing cost.

It can be understood that the reflective surface and the back plate may be integrated, for example, a ceramic with good reflective effect is used. Of course, it can also be split. At this time, the back plate can be made of metal or alloy, and the material of the reflective surface can be plastic, such as polyethylene terephthalate (Polyethylene terephthalate). terephthalate, referred to as PET).

In this embodiment, preferably, the glossiness of the reflecting surface 12 is a, where 15 ≦ a ≦ 35.

Gloss is the degree to which the surface of the object is represented by numbers close to the mirror surface. When the gloss of the reflecting surface 12 is in the range of 15 to 35, the reflecting surface 12 has better reflection ability, which can reflect the light into the light guide plate 3 and reduce the light source. 2 The loss of light in the propagation process improves the utilization of light.

Specifically, the material of the back plate 1 is ceramic.

In this embodiment, the material of the back plate 1 may be ceramics, such as a composite ceramic material, and of course, other materials may be used. The surface of the ceramic backplane 1 has a reflective optical function, and by adjusting the internal module structure, it is not necessary to provide a side reflective sheet on the side of the light guide plate 3. In addition, ceramics can be injection molded to ensure that parts with complex shapes can be finished on the basis of low cost and low consumption. The finished product has high dimensional accuracy, no or only a small amount of mechanical processing is required, and it is easy to realize mechanical automation; high thermal conductivity, no need to use traditional aluminum radiators, to meet the heat dissipation requirements of the internal light source; hot pressing sintering molding; thin wall strength , Can effectively ensure the flatness of the backplane 1, further ensure the optical visual effect requirements, and effectively avoid the problem of abrasion of the light guide plate 3.

Referring to FIG. 1, the display module 100 further includes a reflective sheet 4. The reflective sheet 4 is disposed between the light guide plate 3 and the bottom wall of the receiving slot 11.

Optionally, in order to improve the utilization rate of light and improve the brightness of the light of the display module 100, the display module 100 is further provided with a reflective sheet 4 between the light guide plate 3 and the bottom wall of the containing groove 11, the light guide plate 3 facing the containing groove 11 The light emitted from one side of the bottom wall can enter the light guide plate 3 under the reflection of the reflection sheet 4 and pass through the light exit surface 32 of the light guide plate 3.

Please continue to refer to FIG. 1. The display module 100 further includes a display panel 5 that covers the notch of the receiving slot 11. The back plate 1 is provided with a supporting platform 13 adjacent to the reflective surface 12. One end of the display panel 5 is pasted on the screen sealant 6 Carrying table 13.

In this embodiment, the backplane 1 is provided with a supporting platform 13 for supporting the display panel 5 adjacent to the reflecting surface 12. The supporting platform 13 may have a side wall of the accommodating groove 11 adjacent to the reflecting surface 12 extending outward. The backplane 1 is integrally formed to simplify the production process. Of course, in other embodiments of the present application, the carrying platform 13 and the back plate 1 may be provided separately or connected by a detachable connection. In addition, the screen sealant 6 may be a thermosensitive adhesive. One end of the display panel 5 is pasted on the carrying platform 13 via the screen sealant 6 to achieve the effect of no border or narrow border, saving the total price of structural parts and mold costs, saving production costs, in addition, it can make the display module 100 more portable And beautiful appearance. It can be understood that the back plate 1 can be roughened at the place where the screen sealing glue 6 is pasted, so as to facilitate the pasting of the screen sealing glue 6.

In addition, a protrusion 132 is provided on the side of the carrying platform 13 away from the notch, and the protrusion 132 has a limiting effect on the display panel 5. Of course, the display panel can also be limited and fixed by the limit structure formed by the bearing platform and the boss.

Please refer to FIG. 1 again. The side of the carrying platform 13 facing the display panel 5 is provided with a positioning groove 131. The screen sealant 6 is accommodated and limited to the positioning groove 131.

Optionally, the sealing glue 6 is limited to the positioning groove 131 opened on the side of the carrying platform 13 facing the display panel 5, and the depth of the positioning groove 131 can be determined according to the thickness of the sealing glue 6 so that the sealing glue 6 is slightly exposed for positioning The slot of the slot 131 is convenient for pasting the display panel 5. The positioning groove 131 can, on the one hand, make the overall structure more stable; on the other hand, it can limit the position of the sealing glue 6 to ensure the consistency of the products produced.

1, the display module 100 further includes a plastic frame 7. The plastic frame 7 includes an integrally connected connecting portion 72 and an extending portion 71. The connecting portion 72 is provided on the outer wall of the receiving slot 11 adjacent to the light source 2. The extending portion 71 Extending toward the notch of the accommodating groove 11, the end of the display panel 5 away from the supporting table 13 is pasted on the side of the extending portion 71 facing away from the bottom wall of the accommodating groove 11.

In this embodiment, the connecting portion 72 and a side wall of the backplane 1 adjacent to the light source 2 can be connected by snaps or screws, which is convenient for disassembly, so as to facilitate the installation of the light source 2 and the PCB board 9 that controls the light source, and improve production efficiency. The extending portion 71 is formed by bending and extending from the connecting portion 72 toward the notch of the accommodating groove 11. The end of the display panel 5 away from the carrier 13 is pasted on the extending portion 71. 5 Fixing is more stable, improving the structural stability of the product.

Please refer to FIG. 1 again. The display module 100 further includes an optical film 8. The optical film 8 includes a diffusion sheet 81 and a brightness enhancement sheet 82 that are stacked, and the diffusion sheet 81 is attached to the light exit surface 32 of the light guide plate 3 and the brightness enhancement sheet 82. It is provided on the side of the diffusion sheet 81 facing away from the light guide plate 3.

In this embodiment, the light exit surface 32 of the light guide plate 3 is provided with a diffusion sheet 81 and a brightness enhancement sheet 82 in this order. The diffusion sheet 81 diffuses the light more uniformly and makes the light seen by the display panel 5 more uniform; the brightness enhancement sheet 82 can increase the brightness of light, thereby improving the display effect of the display device. After the linear light source 2 emitted by the light source 2 enters the light guide plate 3, it is reflected by the reflection sheet 4 and the reflection surface 12 and then exits from the light exit surface 32, and forms a uniform surface light source 2 through the diffusion sheet 81 and is displayed on the display panel 5.

The present application also proposes a display device (not shown). The display device includes a display module 100, and the display module 100 is the above-mentioned display module 100. Since the display module 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least the effects brought by the technical solutions of the above-mentioned embodiments, and no more details are provided here.

The above are only the preferred embodiments of the present application, and therefore do not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect use of the content of the description and drawings of the present application under the inventive concept of the present application All other related technical fields are included in the patent protection scope of this application.

Claims

A display module, including:

A back plate, the back plate is provided with a containing groove, and a reflecting surface is formed on one side wall of the containing groove;

A light guide plate is accommodated in the containing groove, a side of the light guide plate facing away from the reflecting surface has a light incident side surface, and a side of the light guide plate facing away from the bottom wall of the containing groove has a light exit surface; as well as

A light source is accommodated in the containing groove and is disposed adjacent to the light incident side of the light guide plate, the light source enters light from the light incident side and exits from the light exit surface, and the reflection surface reflects through The light from the light guide plate is emitted from the light exit surface.
The display module according to claim 1, wherein the display module further comprises a reflective sheet, and the reflective sheet is disposed between the light guide plate and the bottom wall of the receiving groove.
The display module according to claim 2, wherein the display module further comprises a display panel covering the notch of the receiving slot, the back plate is provided with a carrying platform adjacent to the reflective surface, and the display One end of the panel is pasted on the carrying platform via screen sealant.
The display module according to claim 3, wherein a positioning groove is provided on a side of the carrying platform facing the display panel, and the screen sealing glue is accommodated and limited to the positioning groove.
The display module according to claim 4, wherein the display module further comprises a plastic frame, and the plastic frame includes an integrally connected connecting portion and an extending portion, the connecting portion is provided in the receiving groove adjacent to the On the outer wall on the light source side, the extension portion extends toward the notch of the accommodating groove, and the end of the display panel away from the carrying platform is pasted on the side of the extension portion facing away from the bottom wall of the accommodating groove.
The display module according to claim 4, wherein the display module further comprises an optical film, the optical film comprising a diffusion sheet and a brightness enhancement sheet arranged in a stack, the diffusion sheet is attached to the light guide plate , The brightness enhancement sheet is provided on the side of the diffusion sheet facing away from the light guide plate.
The display module of claim 1, wherein the reflectivity of the reflective surface is greater than or equal to 96.2%.
The display module according to claim 1, wherein the glossiness of the reflective surface is a, where 15≤a≤35.
The display module according to claim 1, wherein the back plate is made of ceramic.
The display module according to claim 9, wherein the display module further comprises a reflective sheet, and the reflective sheet is disposed between the light guide plate and the bottom wall of the receiving groove.
The display module according to claim 10, wherein the display module further comprises a display panel covering the notch of the receiving slot, and the back plate is provided with a carrying platform adjacent to the reflective surface, and the display One end of the panel is pasted on the carrying platform via screen sealant.
The display module according to claim 11, wherein a positioning groove is provided on a side of the carrying platform facing the display panel, and the screen sealant is accommodated and limited to the positioning groove.
The display module according to claim 12, wherein the display module further comprises a plastic frame, and the plastic frame includes an integrally connected connecting portion and an extending portion, the connecting portion is provided in the receiving groove adjacent to the On the outer wall on the light source side, the extension portion extends toward the notch of the accommodating groove, and the end of the display panel away from the carrying platform is pasted on the side of the extension portion facing away from the bottom wall of the accommodating groove.
The display module according to claim 12, wherein the display module further comprises an optical film, and the optical film includes a diffusion sheet and a brightness enhancement sheet which are stacked, and the diffusion sheet is attached to the light guide plate , The brightness enhancement sheet is provided on the side of the diffusion sheet facing away from the light guide plate.
A display device, including: a display module,

The display module includes a back plate, the back plate is provided with a receiving groove, and a reflective surface is formed on a side wall of the receiving groove;

A light guide plate is accommodated in the containing groove, a side of the light guide plate facing away from the reflecting surface has a light incident side surface, and a side of the light guide plate facing away from the bottom wall of the containing groove has a light exit surface; as well as

A light source is accommodated in the containing groove and is disposed adjacent to the light incident side of the light guide plate, the light source enters light from the light incident side and exits from the light exit surface, and the reflection surface reflects through The light from the light guide plate is emitted from the light exit surface.
The display device according to claim 15, wherein the display module further comprises a reflective sheet, and the reflective sheet is provided between the light guide plate and the bottom wall of the receiving groove.
The display device of claim 15, wherein the reflectance of the reflective surface is greater than or equal to 96.2%.
The display device according to claim 15, wherein the glossiness of the reflecting surface is a, where 15≤a≤35.
The display device according to claim 15, wherein the back plate is made of ceramic.
The display device according to claim 19, wherein the display module further comprises a reflective sheet, the reflective sheet being disposed between the light guide plate and the bottom wall of the receiving groove. The