CN113156704A

CN113156704A - Display module

Info

Publication number: CN113156704A
Application number: CN202110436904.9A
Authority: CN
Inventors: 俞辉; 刘成坤; 陈明; 刁凯; 刘杰; 余海龙
Original assignee: BOE Technology Group Co Ltd; Fuzhou BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Fuzhou BOE Optoelectronics Technology Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-07-23

Abstract

The application provides a display module assembly can make the light distribution that the light source subassembly sent in the marginal area of display area to strengthen marginal area's light-emitting, improved marginal area's light efficiency. The display module comprises a display screen, an optical assembly and a light source assembly which are arranged in a stacked mode; the display screen comprises a display area, wherein the display area comprises a central area and an edge area surrounding the central area; the display module also comprises a frame body, and the frame body is positioned between the optical assembly and the light source assembly; the frame body comprises a light inlet face, a reflecting face and a light outlet face, the light inlet face is arranged close to a light source of the light source assembly, the reflecting face is arranged corresponding to the light inlet face, the light outlet face is arranged close to the display screen, the light inlet face is a transparent face, light emitted by the light source assembly enters the frame body through the light inlet face, and after the light is reflected by the reflecting face in the frame body, the light is emitted to the edge area of the display area through the light outlet face.

Description

Display module

Technical Field

The application relates to the technical field of display, especially, relate to a display module assembly.

Background

Currently, a dual display panel is used as a high-end monitor screen, and has the characteristics of high display brightness, high requirement on picture uniformity, high contrast ratio and the like. The carried double display panel consists of two liquid crystal display panels (a main display panel and an auxiliary display panel), wherein a color film is arranged in the main display panel and is used for providing visual stimulation; the secondary display panel is provided with no color film and is used for backlight fine light control. Under the condition of providing ultrahigh display brightness, the dual-display panel module has ultrahigh (ultra-million) contrast and excellent dark state detail display capability.

However, the dual display panel has excellent display performance and brings great problems to design. In dual display panels, the use of separate liquid crystals to control light transmission results in lower overall transmittance, while professional monitors require higher brightness (HDR1000), and therefore direct-lit starry backlights must be used to provide sufficiently high backlight brightness.

As shown in fig. 1, the display area AA 'of the dual display panel 10' includes a central area a1 'and an edge area a 2', and the edge area a2 'is disposed around the central area a 1'. The lamp panel 31 ' provided with a plurality of uniformly distributed lamp beads 32 ' is fixed on the back plate 60 ' and is used as a luminous source; the diffusion plate 21 ' is placed on the auxiliary rubber frame 50 ' or the supporting structure, an interval space 40 ' is arranged between the diffusion plate 21 ' and the lamp panel 31 ', and the interval space 40 ' and the diffusion plate 21 ' form a light mixing space; the optical film layer 22 'is arranged on the diffusion plate 21' for improving the light efficiency and covering the defects; the light emitted from the lamp panel 31 'passes through the light mixing space (the space 40' and the diffusion plate 21 ') and the optical film layer 22' to form a uniform surface light source. The light emitted from the lamp bead 32' travels in the direction of the arrow in the figure. Compared with the edge-type backlight, the direct-type backlight can provide a relatively uniform backlight, but the defect of uneven screen exists, and the reasons for the defect are as follows:

1. the light emitting surface of the lamp bead 32 'is a fixed angle (usually, the light emitting surface of the lens-free lamp bead 32' is less than 180 °), the number of light mixing layers at different positions in the space is different, and the number of light mixing layers of the edge area a2 'of the display area AA' is certainly less than that of the central area a1 'of the display area AA' due to the boundary condition.

2. As shown in fig. 1, since the space between the starry backlight beads 32 'is small, the supporting light pillars cannot be used, so that the sub-frame 50' or the supporting structure must have a supporting surface of a certain size. The light rays of the lamp beads 32 ' arranged at the edge of the lamp panel 31 ' are easily reflected or shielded by the auxiliary rubber frame 50 ' or the supporting structure. Especially in the narrow bezel module design, the edge area a2 'cannot be shielded to reduce the light effect, which may directly result in the light not spreading over the whole display area AA'.

If the ratio of the light effect of the edge area to the light effect of the central area in the single-layer display panel is K1, the ratio of the light effect of the edge area to the light effect of the central area in the display area after passing through the dual display panel is K2(K1> K2), so that the non-uniformity in the backlight (especially under a pure color picture) is more easily exposed to the field of view of a user. As shown in fig. 2, the edge area a2 ' of the dual display panel 10 ' forms a circle of continuous macula lutea C (indicated by black dots, and the density of the macula lutea C is greater closer to the outer periphery of the edge area a2 '), which has a greater influence on the display quality.

Therefore, how to make light spread over the whole display area in the narrow frame module design and improve the light efficiency of the edge area of the display area is a technical problem to be solved urgently in the field.

Disclosure of Invention

The application provides a display module assembly, through the concrete structure that sets up the framework, the light distribution that can make the light source subassembly send is in the marginal area of display area to strengthened marginal area's light-emitting, improved marginal area's light efficiency, made light spread whole display area, realized the homogeneity of the demonstration of whole display area.

According to an embodiment of the present application, a display module is provided, which includes a display screen, an optical assembly located below the display screen, and a light source assembly located below the optical assembly;

the display screen comprises a display area, wherein the display area comprises a central area and an edge area surrounding the central area;

the display module further comprises a frame body, the frame body is positioned between the optical assembly and the light source assembly, one end of the frame body is arranged along the outer periphery of the light source assembly, and the other end of the frame body is arranged along the outer periphery of the optical assembly; the frame body is including being close to go into the plain noodles that the light source of light source subassembly set up, corresponding to go into the plane of reflection that the plain noodles set up and be close to go out the plain noodles that the display screen set up, it is the transparency to go into the plain noodles, the light that the light source subassembly sent by go into the plain noodles and get into the frame body, through in the frame body after the plane of reflection, by it jets out to go out the plain noodles the marginal area of display area.

Optionally, the light incident surface is a first inclined surface, and the first inclined surface gradually extends from one end close to the light source assembly to one end close to the optical assembly toward the outer peripheral edge of the display module; and/or the presence of a gas in the gas,

the reflecting surface is provided with at least one second inclined surface, and the second inclined surface gradually extends towards the direction of the outer periphery close to the display module from one end close to the light source component to one end close to the optical component.

Optionally, the light incident surface is a first inclined surface, and an included angle between the first inclined surface and a horizontal plane is 65-90 degrees.

Optionally, the reflecting surface is provided with at least one second inclined surface, and an included angle between the second inclined surface and the horizontal plane is 55 to 60 degrees.

Optionally, the outer side of the reflecting surface is coated with a reflecting coating.

Optionally, the frame body has a refractive index of 1.4-1.5.

Optionally, the frame body is made of polycarbonate or polymethyl methacrylate.

Optionally, the frame body includes a first horizontal portion, a second horizontal portion and a supporting portion, the supporting portion is connected to the first horizontal portion, the second horizontal portion and the supporting portion, the first horizontal portion and the second horizontal portion are both parallel to a plane where the display screen is located, the first horizontal portion abuts against the light source assembly, and the second horizontal portion abuts against the optical assembly.

Optionally, the width of the support portion of the frame body is 0.7-1.2 mm.

Optionally, the frame body is a rubber frame.

The utility model provides a display module assembly, through the concrete structure that sets up the framework, the light distribution that can make the light source subassembly send is in the marginal area of display area to strengthened marginal area's light-emitting, improved marginal area's light efficiency, made light spread whole display area, realized the homogeneity of the demonstration of whole display area. The frame body has a supporting effect on the optical assembly, and meanwhile, light rays at the periphery of the light source assembly can be effectively collected, so that the light effect of the edge area of the display area is enhanced; moreover, the framework in this application need not additionally increase the structure, can directly accomplish in current mould retouching, practices thrift use cost.

Drawings

Fig. 1 is a schematic partial sectional structure diagram of a display module in the prior art.

Fig. 2 is a schematic diagram of a display effect of a display module in the prior art.

Fig. 3 is a schematic partial sectional structural view of a display module according to an exemplary embodiment of the present application.

Fig. 4 is a partially sectional structural schematic view of a frame body of an exemplary embodiment of the present application.

Fig. 5 is a schematic view illustrating a display effect of a display module according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "plurality" includes two, and is equivalent to at least two. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

As shown in fig. 3 and 4, the present embodiment provides a display module 1. The display module 1 includes a display screen 10, an optical assembly 20 disposed below the display screen 10, and a light source assembly 30 disposed below the optical assembly 20.

The display screen 10 includes a display area AA and a bezel area BB provided around the display area AA. The display area AA includes a central area a1 and an edge area a2 surrounding the central area a 1. The display screen 10 includes a main display panel and a sub display panel in a thickness direction T. A color film is arranged in the main display panel and used for providing visual stimulation; the secondary display panel is provided with no color film and is used for backlight fine light control.

The optical assembly 20 is disposed parallel to the display screen 10, and the optical assembly 20 includes a diffusion plate 21 and an optical film 22 stacked together, and the diffusion plate 21 is disposed between the optical film 22 and the light source assembly 30.

The light source assembly 30 includes a lamp panel 31 and a plurality of lamp beads 32 uniformly distributed on the lamp panel 31.

Wherein, be equipped with the interval between thickness direction T optical assembly 20 along display module and the light source subassembly 30, promptly, be equipped with interval space 40 between diffuser plate 21 and the lamp plate 31, diffuser plate 21 and this interval space 40 constitute and mix the light space.

The display module 1 further includes a frame 50, the frame 50 is located between the optical assembly 20 and the light source assembly 30, one end of the frame 50 is disposed along the outer periphery of the light source assembly 30, the other end of the frame 50 is disposed along the outer periphery of the optical assembly 20, and the frame 50 is made of a transparent material.

The frame 50 includes a first horizontal portion 51, a second horizontal portion 52, and a supporting portion 53, the supporting portion 53 is connected between the first horizontal portion 51 and the second horizontal portion 52, and both the first horizontal portion 51 and the second horizontal portion 52 are parallel to a plane where the display screen 10 is located. The first horizontal portion 51 abuts against the outer peripheral edge of the light source unit 30, and the second horizontal portion 52 abuts against the outer peripheral edge of the optical unit 20. The first horizontal portion 51 is provided to enlarge a contact area with the light source assembly 30, and the second horizontal portion 52 is also provided to enlarge a contact area with the optical assembly 20, thereby providing a better supporting effect. The height H of the support 53 is equal to the spacing between the optical assembly 20 and the light source assembly 30.

The frame body 50 is integrally formed, so that additional processing is not required.

The supporting portion 53 includes an incident surface 531 disposed near the light source of the light source assembly 30, a reflecting surface 532 disposed corresponding to the incident surface 531, and an emergent surface 533 disposed near the display screen 10, wherein light emitted from the light source assembly 30 enters the supporting portion 53 through the incident surface 531, is reflected by the reflecting surface 532 in the supporting portion 53, and then is emitted to the edge area a2 of the display area AA through the emergent surface 533. Wherein the propagation path of the light emitted from the light source assembly 30 is shown by the direction of the arrows in fig. 3.

Further, the light emitted from the light source assembly 30 can be emitted from the light-emitting surface 533 to the edge area a2 and the frame area BB of the display area AA.

Specifically, the light incident surface 531 is a first inclined surface 534, and the first inclined surface 534 gradually extends toward the outer peripheral edge of the display module 1 from the end close to the light source assembly 30 to the end close to the optical assembly 20, that is, as shown in fig. 3, the light incident surface 531 is inclined outward in an inclined manner, so that the light emitted from the light source assembly 30 can better enter the frame 50. Alternatively, the light incident surface 531 is disposed along the thickness direction T of the display module.

Specifically, the included angle α between the first inclined surface 534 (i.e., the light incident surface 531) and the horizontal plane is 65 degrees to 90 degrees, so that the light emitted from the light source assembly 30 can better enter the supporting portion 53 of the frame 50. When the light incident surface 531 is disposed along the thickness direction T of the display module, an included angle α between the light incident surface 531 and the horizontal plane is 90 degrees.

The reflective surface 532 is provided with at least one second inclined surface 535, which gradually extends from one end close to the light source assembly 30 to one end close to the optical assembly 20 toward the outer peripheral edge of the display module 1, that is, as shown in fig. 3, the reflective surface 532 is inclined outward in an inclined manner, so that the light emitted from the light source assembly 30 can be better emitted from the light emitting surface 533 to the edge area a2 of the display area AA and the bezel area BB. Specifically, the second inclined surface 535 has an included angle β of 55 degrees to 60 degrees with the horizontal plane, so as to better reflect the light emitted from the light source assembly 30 to the edge area a2 of the display area AA.

In this embodiment, the number of the second inclined surfaces 535 is two, but is not limited thereto, and the number of the second inclined surfaces 535 may be one or three to obtain other values, which can be adjusted according to the effect that the display module 1 needs to display.

The included angle α and the included angle β formed by the two second inclined planes 535 and the horizontal plane respectively may be the same or different, and both need to be adjusted according to the effect that the display module 1 needs to display.

Preferably, the outer side of the reflective surface 532 is coated with a reflective coating 54. The reflective coating 54 may be PET particles (PET is called Polyethylene terephthalate for short, and is commonly called polyester resin) or other coating materials with good reflective performance.

Preferably, the frame 50 has a refractive index of 1.4 to 1.5. The frame body 50 is a rubber frame. The frame 50 is made of polycarbonate or polymethyl methacrylate, but is not limited thereto, and may be made of other transparent materials having a refractive index of 1.4 to 1.5.

Considering the effect of shrinkage during the injection molding process of the plastic part, the width W of the support portion 53 of the frame 50 is 0.7-1.2 mm. However, in the application of the display module 1 with large size, large load, etc., the specific value of the width of the supporting portion 53 may be larger. The height H of the support part 53 of the frame 50 is 0.4 to 0.5 times the height of the light mixing space.

As shown in fig. 3, according to the working principle of the frame 50 of this embodiment, light emitted by the light source assembly 30 reaches the light incident surface 531 along the arrow direction, part of the light directly passes through the light incident surface 531 to be reflected to the display area AA, the other part of the light refracts to enter the supporting portion 53, and after being reflected by the reflecting surface 532, the light emitted by the periphery of the light source assembly 30 is collected by the reflecting surface 532 to form direct light, so that the light effect area of the light emitted by the light source assembly 30 can be expanded, the light effect of the edge area a2 of the display area AA is improved, and the problem that the edge of the edge area a2 of the display area AA is yellow or dark due to insufficient light is reduced.

The display module 1 further includes a back plate 60, and the lamp panel 31 and the first horizontal portion 51 of the partial frame 50 are fixed on the back plate 60. An outer frame 70 is disposed on an outer side of the back plate 60, the outer frame 70 includes a first portion 71 and a second portion 72, the first portion 71 is disposed perpendicular to the second portion 72, the second portion 72 is disposed along a thickness direction of the display module 1, and the first portion 71 is disposed between the display screen 10 and the optical assembly 20. The frame 80 is disposed outside the outer frame 70, the frame 80 is disposed outside the periphery of the display screen 10 and corresponds to the frame area BB of the display screen 10, and the frame 80 is made of metal.

The display module assembly 1 of this embodiment, through the concrete structure who sets up framework 50, can make the light distribution that light source subassembly 30 sent in the marginal area a2 of display area AA to strengthened the light-emitting of marginal area a2, improved marginal area a 2's light efficiency, made light fill up whole display area AA, realized the homogeneity of the demonstration of whole display area AA. The frame 50 in this embodiment not only has a supporting function for the optical assembly 20, but also can effectively collect the light rays around the light source assembly 30, so as to reinforce the lighting effect of the edge area a2 of the display area AA; moreover, the frame body 50 in this embodiment does not need to additionally add a structural member, and can be directly finished by trimming the mold in the current mold, thereby saving the use cost.

The frame body 50 in this embodiment is particularly suitable for a display module with a narrow frame, because the frame 80 of the display module 1 with a narrow frame is limited in size, the orthographic projection of the frame body 50 on the display screen 10 is usually located in the display area AA, and the frame body 50 in the prior art usually adopts white Polycarbonate (PC) to reduce the cost, and will reflect or block the edge light of the light source assembly 30, so that the light efficiency of the edge area a2 of the display area AA will be affected; the frame 50 in the present embodiment not only has a supporting function, but also can effectively collect light rays around the light source assembly 30, so as to enhance the lighting effect of the edge area a2 of the display area AA.

The display module 1 of the present embodiment has the display effect as shown in fig. 5, and it can be seen that the macula lutea C of the edge area a 2' of the dual display panel module in fig. 2 has disappeared in fig. 5, and the display module 1 of the present embodiment greatly improves the lighting effect of the edge area a2 of the display area AA of the display screen 10 by setting the specific structure of the frame 50.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A display module is characterized by comprising a display screen, an optical assembly and a light source assembly, wherein the optical assembly is positioned below the display screen;

2. The display module as claimed in claim 1, wherein the light incident surface is a first inclined surface, the first inclined surface gradually extends from an end close to the light source assembly to an end close to the optical assembly toward an outer peripheral edge of the display module, or the light incident surface is disposed along a thickness direction of the display module; and/or the presence of a gas in the gas,

3. The display module as claimed in claim 1, wherein the light incident surface is a first inclined surface, and an included angle between the first inclined surface and a horizontal plane is 65-90 degrees.

4. The display module as claimed in claim 1, wherein the reflective surface has at least one second inclined surface, and the angle between the second inclined surface and the horizontal plane is 55-60 degrees.

5. The display module of any one of claims 1-4, wherein the reflective surface is coated with a reflective coating on the outside.

6. The display module according to any one of claims 1 to 4, wherein the frame has a refractive index of 1.4 to 1.5.

7. The display module according to any one of claims 1 to 4, wherein the frame body is made of polycarbonate or polymethyl methacrylate.

8. The display module according to any one of claims 1-4, wherein the frame comprises a first horizontal portion, a second horizontal portion, and a support portion, the support portion is connected between the first horizontal portion and the second horizontal portion, the first horizontal portion and the second horizontal portion are both parallel to a plane on which the display screen is located, the first horizontal portion abuts against the light source assembly, and the second horizontal portion abuts against the optical assembly.

9. The display module according to any one of claims 1 to 4, wherein the width of the support portion of the frame body is 0.7 to 1.2 mm.

10. The display module according to any one of claims 1 to 4, wherein the frame body is a plastic frame.