CN113109969A

CN113109969A - Backlight device and display

Info

Publication number: CN113109969A
Application number: CN202110377816.6A
Authority: CN
Inventors: 胡晓刚; 余思慧
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-07-13

Abstract

The invention belongs to the technical field of liquid crystal display equipment, and particularly relates to a backlight device and a display. The backlight device includes a support structure and a light emitting structure. The supporting structure comprises a back plate, and an installation cavity is formed in one side plate surface of the back plate. Light-emitting structure includes the total reflection layer and is located the lamp plate of installation cavity, the lamp plate is connected at the bottom of the chamber of installation cavity and is had the play plain noodles, set up at the bottom of the chamber of play plain noodles back to the back of the body installation cavity, the total reflection layer is made by the printing opacity material and coats in the play plain noodles, the lamp plate is provided with a plurality ofly, tiling setting and concatenation setting in proper order at the bottom of the chamber of the relative installation cavity of each lamp plate, and form the concatenation seam between the flange reason of two arbitrary adjacent lamp plates, light-emitting structure still includes the caulking strip, the caulking strip is including layer and the joint sealing layer of caulking, all be provided with the caulking strip in each concatenation seam, and the one end of two arbitrary adjacent. The invention can eliminate the splicing seams at the splicing positions of the lamp panels, and effectively avoids imperfect pictures of the display caused by splicing.

Description

Backlight device and display

Technical Field

The invention belongs to the technical field of liquid crystal display equipment, and particularly relates to a backlight device and a display.

Background

At present, due to the continuous impact of the OLED (Organic Light-Emitting Diode), the LCD (liquid Crystal display) industry is continuously developing innovations, and a Mini LED (Mini Light-Emitting Diode) and a micro LED (micro Light-Emitting Diode) are developed, which still belong to the LCD backlight technology, and only through the introduction of the technologies of packaging, size reduction and mass transfer, the ability of backlight area control is improved, the optical distance of backlight is reduced, and further the backlight technology with ultra-thin and high dynamic contrast is realized. The introduction of the Mini LED backlight is beneficial to breaking through the limitation of the LCD and weakening the advantages of the self-luminous technology, thereby further enlarging the cost performance difference of the LCD in the alternative technology. The mini LED has a higher dynamic range, better contrast, and longer life than the OLED, and the screen response speed is much faster than the OLED, compared to the OLED, so the mini LED will be a future trend and development direction.

However, with the continuous demand for large size, due to the limitation of the production process, the mini LED backlight generally cannot be a single board, and a plurality of small-sized lamp panels need to be spliced into a large-sized lamp panel. Because the splicing part generally has splicing seams, the splicing seams can cause the picture to have imperfect effects such as light and shade under certain conditions.

Disclosure of Invention

An object of the embodiment of the application is to provide a backlight device, aim at solving how to eliminate the concatenation seam of a plurality of lamp plates of splicing each other and lead to the display picture to demonstrate light and shade scheduling problem.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a backlight device, characterized by comprising:

the supporting structure comprises a back plate, and an installation cavity is formed in one side plate surface of the back plate; and

light-emitting structure, include the total reflection layer and be located the lamp plate of installation cavity, the lamp plate is connected the chamber end of installation cavity has a play plain noodles, go out the plain noodles and carry on the back mutually the chamber end of installation cavity sets up, the total reflection layer is made by printing opacity material and coats in go out the plain noodles, the lamp plate is provided with a plurality ofly, each the lamp plate is relative the chamber end tiling of installation cavity sets up and splices the setting in proper order, and forms the concatenation seam between the flange of two arbitrary adjacent lamp plates, light-emitting structure still includes the joint strip, the joint strip include by joint layer and the cover that printing opacity material made joint layer and be used for connecting two that correspond joint layer is used for connecting the joint sealing layer of corresponding lamp plate, each all be provided with in the concatenation seam strip, and arbitrary adjacent two joint strip's one end in two that correspond the confluence department of concatenation seam connects.

In one embodiment, the light emitting surfaces are coplanar.

In one embodiment, the light emitting structure further includes a protective layer, the protective layer is coated on each of the total-reflection layers and covers each of the joint-filling strips, and the protective layer and each of the sealant layers are integrally formed.

In one embodiment, the support structure further comprises an adhesive layer, which is located between the cavity bottom of the installation cavity and the lamp panel and is used for adhering the lamp panel to the backboard.

In one embodiment, the supporting structure further includes a transverse reinforcing rib arranged along the length direction of the back plate and a longitudinal reinforcing rib arranged along the width direction of the back plate, the longitudinal reinforcing rib and the transverse reinforcing rib are both connected to the bottom of the cavity of the installation cavity, the longitudinal reinforcing rib and the transverse reinforcing rib are both provided with a plurality of ribs at intervals, each transverse reinforcing rib is sequentially provided with a plurality of ribs at intervals along the width direction of the back plate, each longitudinal reinforcing rib is sequentially provided with a plurality of ribs at intervals along the length direction of the back plate, the installation cavity is divided into a plurality of compartments, the lamp panel is installed at each compartment, and each panel edge of the lamp panel is respectively abutted against the corresponding transverse reinforcing rib and the corresponding longitudinal reinforcing rib.

In one embodiment, the supporting structure further comprises two supporting bars arranged in the compartment in a protruding mode, the two supporting bars are arranged at intervals, and the two ends of the lamp panel are respectively abutted to the two supporting bars so as to be opposite to the cavity bottom gap of the installation cavity.

In one embodiment, the compartment further defines a plurality of fixed avoiding grooves, and each of the fixed avoiding grooves is spaced around the peripheral edge of the compartment.

In one embodiment, each compartment is provided with a connection avoidance groove, and the light-emitting structure further comprises a connector which is connected with the lamp panel and is positioned in the connection avoidance groove.

In one embodiment, the support structure further includes buffering pads located in the installation cavity and disposed adjacent to the cavity wall of the installation cavity, the buffering pads are disposed in pairs, the two buffering pads are disposed along the length direction or the width direction of the back plate, and each buffering pad is used for supporting the adjacent lamp panel.

Another object of this application still lies in providing a display, and it includes as above backlight device, the display still includes the connection the frame, liquid crystal display panel, diaphragm and the diffuser plate of gluing of backplate, liquid crystal display panel the diaphragm and the diffuser plate all connects glue the frame and in proper order towards the range upon range of setting at the bottom of the chamber of installation cavity.

The beneficial effect of this application lies in: the total reflection of light is ensured by arranging the total emission layer made of the light-transmitting material on the light-emitting surface. And then, joint filling strips are arranged at the joint joints, and the joint filling strips are made of the same material as that of the total reflection layer, so that the joint joints at the joint joints of the lamp panels can be eliminated, and imperfect pictures caused by joint can be effectively avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective structural view of a display according to an embodiment of the present application;

FIG. 2 is an exploded schematic view of the display of FIG. 1;

FIG. 3 is a perspective view of the back plate of FIG. 2;

fig. 4 is a partial enlarged view at a of fig. 3;

fig. 5 is a schematic diagram of splicing a lamp panel provided in another embodiment of the present application;

FIG. 6 is a schematic cross-sectional view of a display along the length of a backplane according to yet another embodiment of the present application;

hatching and orientation figure 7 is a close up view at B of the display of figure 6.

Wherein, in the figures, the respective reference numerals:

100. a display; 101. a front frame; 102. a liquid crystal panel; 103. a rubber frame; 104. a membrane; 105. a diffusion plate; 10. a light emitting structure; 11. a lamp panel; 111. a light-emitting surface; 20. a support structure; 21. a back plate; 211. a mounting cavity; 22. a cushion pad; 23. longitudinal reinforcing ribs; 24. transverse reinforcing ribs; 2111. a compartment; 25. a supporting strip; 216. connecting the avoidance groove; 217. fixing the avoidance groove; 12. a protective layer; 13. filling the gap; 131. a gap filling layer; 132. a glue sealing layer; 14. splicing seams;

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 3, an embodiment of the present application provides a backlight device, which includes a supporting structure 20 and a light emitting structure 10. The supporting structure 20 includes a back plate 21, a mounting cavity 211 is opened on one side of the back plate 21, and optionally, the back plate 21 is made of a metal material, such as metal aluminum. Light-emitting structure 10 includes total reflection layer and the lamp plate 11 that is located installation cavity 211, and optionally, lamp plate 11 is the mini LED lamp plate that is used for producing light. And the size of lamp plate 11 can be set for according to actual demand, and the material of lamp plate 11 is FR 4. The lamp panel 11 is connected to the bottom of the installation cavity 211 and has a light emitting surface 111, and a circuit is arranged on the light emitting surface 111. The light-emitting surface 111 is opposite to the bottom of the installation cavity 211, and the total reflection layer is made of a light-transmitting material and is coated on the light-emitting surface 111. Referring to fig. 4 and 5, optionally, the total reflection layer is white paint, and the total reflection layer does not block the light emitted from the light emitting surface 111 and ensures total reflectivity of the light. The lamp plate 11 is provided with a plurality ofly, and the tiling setting and the concatenation setting in proper order are formed at the bottom of the relative installation cavity 211 of each lamp plate 11 between the flange edge of two arbitrary adjacent lamp plates 11. Referring to fig. 4 and 5, the light emitting structure 10 further includes a joint strip 13, and the joint strip 13 includes a joint layer 131 made of a light-transmitting material and an adhesive layer 132 covering the joint layer 131 and used for connecting the two corresponding lamp panels 11. Optionally, the gap filling layer 131 is also made of white paint, and the cavity bottom of the adjacent installation cavity 211 is disposed, and the sealant layer 132 is coated on the gap filling layer 131 to connect the two corresponding lamp panels 11. The joint filling strips 13 are arranged in the splicing seams 14, and one end of any two adjacent joint filling strips 13 is connected with the junction of the two corresponding splicing seams 14. Optionally, the joint seam 14 of two adjacent lamp panels 11 is provided with a joint strip 13, and the material of the joint strip 13 is the same as that of the total reflection layer, so that the visual effect of eliminating the joint seam 14 can be achieved, and the display effect of the picture is improved. The joint filling strips 13 in the two joint seams 14 which are randomly crossed are connected at the crossed position of the two joint seams 14, so that all the joint filling strips 13 are integrally formed.

The total reflection of the light is ensured by arranging a total emission layer made of a light-transmitting material on the light-emitting surface 111. And then, the joint filling strips 13 are arranged at the joint joints 14, and the joint filling strips 13 are made of the same material as that of the total reflection layer, so that the joint joints 14 at the joint parts of the lamp panels 11 can be eliminated, and imperfect pictures caused by the joint can be effectively avoided. In one embodiment, the light emitting surfaces 111 are coplanar, so as to ensure uniformity of light emitted from the lamp panels 11.

Referring to fig. 1 and 3, in an embodiment, the light emitting structure 10 further includes a protective layer 12, the protective layer 12 is coated on each of the total reflection layers and covers each of the joint strips 13, and the protective layer 12 and each of the adhesive layers 132 are integrally formed. Optionally, the protective layer 12 is in a sticky fluid gel shape, and the protective layer 12 is used for performing uniform glue sealing treatment on each total reflection layer, so that the overall strength and uniformity of splicing of the lamp panels 11 are ensured, and local cracks are avoided.

In one embodiment, the support structure 20 further comprises an adhesive layer located between the bottom of the mounting cavity 211 and the lamp panel 11 and used for adhering the lamp panel 11 to the back panel 21. Alternatively, each lamp panel 11 may be fixed on the back panel 21 by an SMT process.

Referring to fig. 3, in an embodiment, the supporting structure 20 further includes a transverse reinforcing rib 24 disposed along the length direction of the back plate 21 and a longitudinal reinforcing rib 23 disposed along the width direction of the back plate 21, the longitudinal reinforcing rib 23 and the transverse reinforcing rib 24 are both connected to the bottom of the mounting cavity 211, a plurality of longitudinal reinforcing ribs 23 and a plurality of transverse reinforcing ribs 24 are disposed at intervals, each transverse reinforcing rib 24 is sequentially disposed at intervals along the width direction of the back plate 21, each longitudinal reinforcing rib 23 is sequentially disposed at intervals along the length direction of the back plate 21, and divides the mounting cavity 211 into a plurality of compartments 2111, each compartment 2111 is provided with the lamp panel 11, and each plate edge of the lamp panel 11 abuts against the corresponding transverse reinforcing rib 24 and the corresponding longitudinal reinforcing rib 23 respectively. By providing a plurality of transverse reinforcing ribs 24 and a plurality of longitudinal reinforcing ribs 23, the overall structural strength of the back plate 21 is ensured.

In one embodiment, the supporting structure 20 further includes two supporting bars 25 protruding into the compartment 2111, the two supporting bars 25 are spaced apart from each other, and two ends of the lamp panel 11 respectively abut against the two supporting bars 25 to be disposed opposite to the cavity bottom gap of the mounting cavity 211. Optionally, support bar 25 also can set up more than two to keep the stable support to lamp plate 11, and the clearance setting at the bottom of the chamber of lamp plate 11 and installation cavity 211 is favorable to the heat dissipation of lamp plate 11.

In one embodiment, compartment 2111 further defines a plurality of fixed access slots 217, each fixed access slot 217 spaced around the perimeter edge of compartment 2111. Alternatively, the back plate 21 may be fixed to an external structural member through the fixing escape groove 217, thereby achieving the overall fixation of the backlight device.

Referring to fig. 1 and 3, in an embodiment, each compartment 2111 further has a connection avoiding groove 216 formed therein, and the light emitting structure 10 further includes a connector connected to the lamp panel 11 and located in the connection avoiding groove 216. The lamp panel 11 may be connected to a power supply through a connector, and optionally, other IC components may be further disposed on the lamp panel 11 for electrically connecting the adjacent lamp panel 11 and the controller.

Referring to fig. 6 and 7, in an embodiment, the supporting structure 20 further includes buffering pads 22 located in the installation cavity 211 and adjacent to the cavity wall of the installation cavity 211, the buffering pads 22 are arranged in pairs, the two buffering pads 22 are arranged along the length direction or the width direction of the back panel 21, and each buffering pad 22 is used for supporting an adjacent lamp panel 11. Optionally, blotter 22 is made by flexible material, and blotter 22 is provided with many pairs, can reduce the impact to lamp plate 11 through blotter 22, improves each lamp plate 11's stability.

Referring to fig. 1 and fig. 3, the present invention further provides a display 100, where the display 100 includes a backlight device, and the specific structure of the backlight device refers to the above embodiments, and since the display 100 adopts all technical solutions of all the above embodiments, all beneficial effects brought by the technical solutions of the above embodiments are also achieved, and are not described in detail herein.

In one embodiment, the display 100 further includes a rubber frame 103 connected to the back plate 21, a liquid crystal panel 102, a membrane 104, and a diffusion plate 105, wherein the liquid crystal panel 102, the membrane 104, and the diffusion plate 105 are connected to the rubber frame 103 and sequentially stacked toward the bottom of the mounting cavity 211.

Referring to fig. 1 and fig. 3, optionally, the display 100 further includes a front frame 101 connected to the rubber frame 103, and the light-emitting surface 111 of the lamp panel 11 projects light toward the diffuser plate 105 and the film 104, that is, the lamp panel 11 directly carries the diffuser plate 105 and the film 104, and then carries the rubber frame 103, the rubber frame 103 is provided with a buffer double-sided adhesive, and the liquid crystal panel 102 is assembled again through the buffer double-sided adhesive and locked to the source side of the front frame 101, thereby exhibiting a frameless effect.

In one embodiment, the display 100 is a direct-type structure, and the back plate 21 and the mini LED lamp panel 11 are integrally connected through a double-sided tape, a fixing post and a screw structure, thereby exhibiting a perfect splicing effect. The shape of the fixing column can be round, square or hexagonal or other shapes, the number of the fixing columns is n, n is greater than 0, the specific number can be determined according to the size of the lamp panel 11 which is actually manufactured, the depth of the splicing seams 14 can be adjusted according to the thickness of the actual lamp panel 11 and the protective layer 12 on the light-emitting surface 111, the thickness range of the lamp panel 11 is 0.6-1.4 mm, and the thickness range of the protective layer 12 is 0.2-0.5 mm.

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 backlight apparatus, comprising:

2. The backlight device according to claim 1, wherein: the light emitting surfaces are arranged in a coplanar manner.

3. The backlight device according to claim 1, wherein: the light-emitting structure further comprises a protective layer, the protective layer is coated on each full-reflection layer and covers each joint strip, and the protective layer and each sealing adhesive layer are integrally formed.

4. The backlight device according to claim 1, wherein: the support structure further comprises an adhesive layer, wherein the adhesive layer is located between the cavity bottom of the installation cavity and the lamp panel and is used for adhering the lamp panel to the back plate.

5. The backlight device according to claim 1, wherein: the supporting structure further comprises transverse reinforcing ribs arranged in the length direction of the backboard and longitudinal reinforcing ribs arranged in the width direction of the backboard, wherein the longitudinal reinforcing ribs and the transverse reinforcing ribs are connected at the bottom of the cavity of the installation cavity, a plurality of transverse reinforcing ribs are arranged at intervals, and each transverse reinforcing rib is arranged along the width direction of the backboard at intervals in sequence, each longitudinal reinforcing rib is arranged along the length direction of the backboard at intervals in sequence, and the installation cavity is divided into a plurality of compartments, each compartment is arranged at the lamp panel, and each panel edge of the lamp panel is abutted against the transverse reinforcing ribs and the corresponding longitudinal reinforcing ribs.

6. The backlight device according to claim 5, wherein: the supporting structure further comprises a protruding supporting bar arranged in the compartment, the supporting bar is arranged at two intervals, two ends of the lamp panel are respectively abutted to the two supporting bars, and the supporting bar is arranged oppositely to the cavity bottom gap of the installation cavity.

7. The backlight device according to claim 5, wherein: still seted up fixed groove of dodging in the compartment, fixed groove of dodging has seted up a plurality ofly, each fixed groove of dodging winds the neighboring interval setting of compartment.

8. The backlight device according to claim 5, wherein: each still seted up in the compartment and connected and dodged the groove, light emitting structure is still including connecting the lamp plate is located connect and dodge the connector of inslot.

9. The backlight device according to any one of claims 1 to 8, wherein: the supporting structure further comprises cushion pads, the cushion pads are located in the installation cavity and adjacent to the wall of the installation cavity, the cushion pads are arranged in pairs, the cushion pads are arranged along the length direction or the width direction of the back plate, and the cushion pads are used for supporting the adjacent lamp panels respectively.

10. A display comprising the backlight device as claimed in any one of claims 1 to 9, wherein the display further comprises a rubber frame connected to the back plate, a liquid crystal panel, a membrane, and a diffusion plate, and the liquid crystal panel, the membrane, and the diffusion plate are connected to the rubber frame and are sequentially stacked toward the bottom of the mounting cavity.