CN219873577U - Flexible LOCAL mming structure of curved surface display screen - Google Patents

Abstract

The utility model discloses a flexible LOCAL area network (LOCAL) MMING structure of a curved surface display screen, which comprises a flexible substrate, wherein a plurality of copper wiring strips are arranged on the flexible substrate in parallel, a plurality of light-emitting diode (LED) wafers are arranged above the copper wiring strips, die bonding and sealing glue are arranged above the LED wafers, white oil is filled between adjacent copper wiring strips, and an OCA layer is arranged on the upper part of the die bonding and sealing glue. Because the flexible LOCAL display MMING structure of the curved surface display screen adopts the FILM FILM (namely the polyester FILM) or the FPC FILM (namely the polyimide FILM) as the base material, the LED wafers can be more densely bound, finer brightness and color are realized, and meanwhile, the light and thin curved surface display screen product is realized.

Description

Flexible LOCAL mming structure of curved surface display screen

Technical Field

The utility model relates to a curved display screen, in particular to a flexible LOCAL display screen structure.

Background

The main stream products of the current display screen are mainly Printed Circuit Board (PCB) hard board is used as a LOCAL DIMMING base board (LOCAL DIMMING meaning, backlight composed of hundreds of LEDs is used for replacing CCFL backlight lamp, backlight LEDs can be adjusted according to brightness of images, brightness of a highlight part in the display screen images can be maximum, and meanwhile, a dark part can be reduced in brightness and even turned off so as to achieve optimal contrast.

Chinese patent document CN201611271146.5 discloses a LOCAL DIMMING backlight driving circuit, which is characterized by comprising a current sink; a driving power supply; the backlight module comprises a plurality of LED lamps which are arranged in a matrix; the input ends of the power supply selection switches are connected with the driving power supply; the output ends of the power supply selection switches are connected with anodes of the LED lamps in a one-to-one correspondence manner; the input end of each driving switch is connected with the cathodes of at least two LED lamps, and the output end of each driving switch is grounded through the current trap; the LED driving module is used for driving the driving switches to adjust light, and the control module is used for controlling the LED driving module to work and controlling the power supply selection switches to be turned on/off; the control module divides a frame of signals into a plurality of field signals corresponding to the number of the power supply selection switches so as to control the corresponding power supply selection switches to be turned on, and the LED driving module adjusts the brightness of the corresponding LED lamps on the backlight module according to the field signals.

Obviously, the patent uses control command signals to realize control of the LOCAL mming backlight driving circuit, and cannot solve the problem that the LOCAL mming structure of the conventional curved display screen is light and thin.

The Chinese patent document CN202220808997.3 discloses a high-brightness low-power-consumption LOCAL DIMMING liquid crystal backlight module, which comprises a PCB (printed circuit board) with light sources arranged in a matrix on the upper surface; the PCB is characterized in that a total reflection lens is arranged above the PCB, a plurality of groups of first bulges, second bulges and third bulges are uniformly arranged on the lower surface of the total reflection lens, a light collecting cavity with a U-like structure is formed by surrounding each group of first bulges, second bulges and third bulges, each light source is respectively arranged right below each light collecting cavity, the surfaces of two sides of each light collecting cavity are respectively provided with a first curved lens structure, the upper surfaces of each light collecting cavity are respectively provided with a second curved lens structure protruding downwards, the outer side surfaces of each first bulge and each third bulge are respectively provided with a reflecting mirror surface structure, the reflecting mirror surface structures are matched with the first curved lens structures, a bracket is arranged between every two adjacent light collecting cavities, and the total reflection lens is fixedly connected with the PCB through the bracket; an angle deflection film is arranged above the total reflection lens. The upper end part of the total reflection lens is provided with a third curved lens structure, and the third curved lens structure is an aspheric lens array structure. An elliptical diffusion film is arranged above the angle deflection film. And a light enhancement film is arranged above the elliptical diffusion film, and the elliptical diffusion film and the light enhancement film are optically bonded through an OCA adhesive layer or an OCR adhesive layer. The support is formed by injection molding of a material with high reflectivity.

Obviously, the patent uses the total reflection lens to redistribute the light, and cannot solve the light and thin problem of the LOCAL mming structure of the existing curved display screen.

Disclosure of Invention

Based on the above, it is necessary to provide a flexible LOCAL mming structure of a curved display screen, which comprises a flexible substrate, wherein a plurality of parallel copper wiring strips are arranged on the flexible substrate, a plurality of LED wafers are arranged above the copper wiring strips, die bonding and sealing glue are arranged above the LED wafers, white oil is filled between adjacent copper wiring strips, and an OCA layer is arranged on the upper portion of the die bonding and sealing glue. Because the flexible LOCAL display MMING structure of the curved surface display screen adopts the FILM FILM (namely the polyester FILM) or the FPC FILM (namely the polyimide FILM) as the base material, the LED wafers can be more densely bound, finer brightness and color are realized, and meanwhile, the light and thin curved surface display screen product is realized.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the flexible LOCAL mming structure of the curved surface display screen is characterized by comprising a flexible substrate, wherein a plurality of copper wiring strips are arranged on the flexible substrate in parallel, a plurality of LED wafers are arranged above the copper wiring strips, die bonding and sealing glue are arranged above the LED wafers, white oil is filled between adjacent copper wiring strips, and an OCA layer is arranged on the upper portion of the die bonding and sealing glue.

As a preferable implementation mode of the flexible LOCAL display MMING structure of the curved display screen, the flexible substrate is a FILM FILM or an FPC FILM.

As a preferred implementation mode of the flexible LOCAL mming structure of the curved display screen, the distance between the copper wiring lines is equal to the width of the LED wafer.

As a preferable implementation mode of the flexible LOCAL mming structure of the curved display screen, the thickness of the white oil is higher than that of the copper wire strips.

As a preferred implementation mode of the flexible LOCAL mming structure of the curved display screen, the thickness of the OCA layer is 0.1-0.2 mm greater than the height of the die bonding adhesive.

As a preferred implementation mode of the flexible LOCAL mming structure of the curved display screen, the edges of the copper wiring lines are provided with outward extending guard edges.

As a preferred implementation mode of the flexible LOCAL mming structure of the curved display screen, the height of the guard edge is one third of the thickness of the LED wafer.

As a preferred implementation mode of the flexible LOCAL mming structure of the curved display screen, the distance between the guard edges is adapted to the width of the LED wafer.

As a preferable implementation mode of the flexible LOCAL display MMING structure of the curved display screen, insulating glue is filled between the copper wiring strips.

As a preferable implementation mode of the flexible LOCAL display MMING structure of the curved display screen, the insulating adhesive is transparent adhesive.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a flexible LOCAL mming structure of a curved surface display screen, which adopts a FILM FILM (namely a polyester FILM) or an FPC FILM (namely a polyimide FILM) as a base material, so that LED wafers can be more densely bound, finer brightness and color are realized, and meanwhile, the light and thin curved surface display screen product is realized.

In addition, an outwardly extending guard edge may be provided at each edge of the copper wiring strip. The height of the guard edge is one third of the thickness of the LED wafer. The distance between the guard edges is adapted to the width of the LED wafer. The LED wafer can be effectively fixed above the copper wiring lines by utilizing the outwards-extending guard edges, and meanwhile, the two shoulders of the LED wafer are protected, so that the LED wafer is effectively prevented from being crushed during binding, and the binding qualification rate is improved.

In addition, an insulating paste may be filled between the copper wiring bars. The insulating adhesive is transparent adhesive. Because the insulating glue is located the below of LED wafer, can play shock attenuation buffering's effect to the LED wafer on the one hand, effectively avoid the LED wafer to be crushed when binding, on the other hand, can effectively reduce the leakage current of adjacent copper wiring strip support, reduce the energy consumption.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a hierarchy of a flexible LOCAL DIMMING structure of a curved display screen of the present utility model;

FIG. 2 is an enlarged detail view of area A of a hierarchical schematic of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 1;

FIG. 3 is a schematic diagram of a hierarchy of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 1, where an OCA layer is applied;

FIG. 4 is an enlarged detail view of area B of a hierarchical schematic of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 3;

FIG. 5 is a schematic diagram of a binding operation of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 1;

FIG. 6 is an enlarged detail schematic view of area C of a binding operation schematic diagram of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 5;

FIG. 7 is a schematic view of a partial perspective view of copper wiring lines of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 1;

FIG. 8 is a schematic view of a partial perspective of a copper wire strip of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 7, at another view angle;

FIG. 9 is a schematic diagram of a hierarchy of yet another embodiment of a flexible LOCAL DIMMING structure of a curved display screen according to the present utility model;

FIG. 10 is an enlarged detail view of area D of a hierarchical schematic of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 9;

FIG. 11 is a schematic view of a partial perspective view of copper wiring lines of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 10;

FIG. 12 is a schematic view of a partial perspective of copper traces of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 11, shown in another view;

FIG. 13 is an enlarged detail view of area E of a schematic view of a partial three-dimensional structure of copper wiring lines of the flexible LOCAL DIMMING structure of the curved display screen of FIG. 12;

FIG. 14 is a schematic view of a partial structure of copper wiring lines of yet another embodiment of a flexible LOCAL DIMMING structure of a curved display screen according to the present utility model;

the labels in the figures are illustrated below: 1. a flexible substrate; 2. copper wiring bars; 21. edge protection; 3. an LED wafer; 4. and (3) die bonding and sealing; 5. white oil; 6. an OCA layer; 7. and (5) insulating glue.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As described in the background art, in the prior art, for the mainstream products of the current display screen, a PCB hard board is generally used as a LOCAL DIMMING base board, and because the products of the PCB hard board structure are thicker, such as a notebook computer, a tablet computer, a television, etc., the products are thicker and heavier, which are not consistent with the light, thin and dense color of the current mainstream, and the LOCAL DIMMING products with curved surfaces are on the market.

In order to solve the technical problem, the utility model provides a flexible LOCAL area display (LOCAL) MMING structure of a curved display screen, which comprises a flexible substrate 1, wherein a plurality of copper wiring strips 2 which are arranged in parallel are arranged on the flexible substrate 1, a plurality of LED wafers 3 are arranged above the copper wiring strips 2, a die bonding sealing adhesive 4 is arranged above the LED wafers 3, and white oil 5 is filled between the adjacent copper wiring strips 2. An OCA layer 6 (i.e. liquid optical cement) is arranged on the upper part of the die bonding sealing glue 4. The flexible substrate 1 is a FILM (i.e., a polyester FILM) or an FPC FILM (i.e., a polyimide FILM).

Through the structural design, as the flexible LOCAL mming structure of the curved surface display screen adopts the FILM FILM (namely the polyester FILM) or the FPC FILM (namely the polyimide FILM) as the base material, the LED wafers 3 can be more densely bound, finer brightness and color are realized, and meanwhile, the light and thin curved surface display screen product is realized.

In order to better understand the solution of the present utility model, the following detailed description will describe the solution of the embodiment of the present utility model with reference to the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, and thus the protection scope of the present utility model is more clearly and definitely defined.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Example 1

As shown in fig. 1 and fig. 2, the flexible LOCAL mming structure of the curved display screen comprises a flexible substrate 1, a plurality of parallel copper wiring strips 2 are arranged on the flexible substrate 1, a plurality of LED wafers 3 are arranged above the copper wiring strips 2, a die bonding and sealing adhesive 4 is arranged above the LED wafers 3, and white oil 5 is filled between adjacent copper wiring strips 2.

As shown in fig. 3 and 4, an OCA layer 6 (i.e., liquid optical adhesive) is disposed on the upper portion of the die attach encapsulant 4.

The flexible substrate 1 is a FILM (i.e., a polyester FILM) or an FPC FILM (i.e., a polyimide FILM).

As shown in fig. 7 and 8, the pitch of the copper wiring bars 2 is equal to the width of the LED wafer 3.

In addition, the thickness of the white oil 5 is higher than that of the copper wiring bar 2. The thickness of the OCA layer 6 is 0.1-0.2 mm greater than the height of the die-bonding adhesive 4.

The operation of this embodiment will be described below.

The flexible LOCAL DIMMING structure of the curved display screen is processed by the following steps:

step 1, copper plating is carried out on the whole surface of a flexible substrate 1, copper lines are manufactured, and copper wiring strips 2 are formed;

step 2, coating white oil 5 on the whole surface of the flexible substrate 1, and manufacturing white oil patterns;

step 3, binding an LED wafer 3;

step 4, performing a die bonding process by using the die bonding and sealing adhesive 4;

step 5, binding the flexible substrate 1 with the main FPC board S, as shown in fig. 4 and 5;

and 6, applying an OCA layer 6 on the surface of the die bonding and sealing adhesive 4, wherein the OCA layer 6 is required to be slightly higher than the die bonding adhesive by 40.1-0.2 mm, so that the LED wafer 3 is prevented from being crushed, and the die bonding and sealing adhesive can be attached to a curved surface display screen after the die bonding and sealing adhesive is finished.

Because the flexible LOCAL display MMING structure of the curved surface display screen adopts the FILM FILM (namely the polyester FILM) or the FPC FILM (namely the polyimide FILM) as the base material, the LED wafers 3 can be more densely bound, finer brightness and color are realized, and meanwhile, the light and thin curved surface display screen product is realized.

Example 2

Further optimizing the flexible LOCAL mming structure of the curved display provided in embodiment 1, specifically, as shown in fig. 9 and 10, the edges of the copper wire strips 2 are each provided with an outwardly extending guard 21.

The height of the guard 21 is one third of the thickness of the LED wafer 3. The pitch of the guard edges 21 is adapted to the width of the LED wafer 3.

The operation of this embodiment will be described below.

The LED wafer 3 can be effectively fixed above the copper wiring strip 2 by the aid of the outwards-extending guard edges 21, two shoulders of the LED wafer 3 are protected, the LED wafer 3 is effectively prevented from being crushed during binding, and the binding qualification rate is improved.

Example 3

Further optimizing the flexible LOCAL diming structure of the curved display provided in embodiment 1 or 2, specifically, as shown in fig. 14, the copper wiring bars 2 are filled with an insulating paste 7 therebetween.

The insulating paste 7 is transparent paste.

The operation of this embodiment will be described below.

Because the insulating glue 7 is located the below of LED wafer 3, can play shock attenuation buffering's effect to LED wafer 3 on the one hand, effectively avoid LED wafer 3 to be crushed when binding, on the other hand, can effectively reduce the leakage current of adjacent copper wiring strip 2 support, reduce the energy consumption.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. The utility model provides a flexible LOCAL area network (LOCAL) DIMMING structure of curved surface display screen, its characterized in that, flexible LOCAL area network (LOCAL) DIMMING structure of curved surface display screen contain flexible substrate (1), flexible substrate (1) on be equipped with a plurality of parallel arrangement's copper wiring strip (2), the top of copper wiring strip (2) be equipped with a plurality of LED wafer (3), the top of LED wafer (3) be equipped with solid brilliant seal gum (4), the packing has white oil (5) between adjacent copper wiring strip (2), the upper portion of solid brilliant seal gum (4) be equipped with OCA layer (6).

2. The flexible LOCAL display screen structure according to claim 1, wherein the flexible substrate (1) is a FILM or an FPC FILM.

3. The flexible LOCAL mming structure of a curved display screen according to claim 1, wherein the pitch of the copper wiring bars (2) is equal to the width of the LED wafer (3).

4. The flexible LOCAL mming structure of a curved display screen according to claim 1, wherein said white oil (5) has a thickness higher than the thickness of said copper wiring bars (2).

5. The flexible LOCAL mming structure of a curved display screen according to claim 1, wherein the thickness of said OCA layer (6) is greater than the height of said die attach encapsulant (4) by 0.1-0.2 mm.

6. The flexible LOCAL mming structure of a curved display screen according to claim 1, wherein the edges of the copper wiring strips (2) are provided with outwardly extending guard edges (21).

7. The flexible LOCAL mming structure of a curved display screen according to claim 6, wherein said guard (21) has a height of one third of the thickness of said LED wafer (3).

8. The flexible LOCAL mming structure of a curved display screen according to claim 6, wherein the distance between the guard edges (21) is adapted to the width of the LED wafer (3).

9. The flexible LOCAL mming structure of a curved display screen according to claim 1, wherein insulating glue (7) is filled between the copper wiring bars (2).

10. The flexible LOCAL mming structure of a curved display screen according to claim 9, wherein said insulating glue (7) is transparent glue.