TWM628097U - Backlight module and display - Google Patents

Abstract

A backlight module and a display with the backlight module, the backlight module comprises: at least one first optical film and at least one second optical film, stacked along an axial direction, the first optical film and the second optical film Different types of optical films, one side of the first optical film is provided with an array of convex objects; and at least one adhesive layer for the second optical film to adhere to the convex objects of the first optical film An air gap is formed between each adjacent two convex objects of the convex object array adhering to the second optical film. Thereby, the light energy can be mixed more uniformly, and the frame body provided for superimposing and fastening the components of the backlight module together can be simplified or omitted.

Description

Backlight Modules and Displays

The present invention relates to a display, in particular to a backlight module and a display.

The liquid crystal display is mainly composed of a backlight module and a liquid crystal display panel stacked on the backlight module. The types of backlight modules can be mainly divided into edge type and direct type. Taking the direct type backlight module as an example, a light source assembly and a plurality of optical films are usually stacked along an axial direction, and then a frame is used to superimpose and fasten the separated elements together. However, the tightness between these phase-separated elements is still insufficient.

Moreover, in order to make the light energy distribution of the light source assembly output to the liquid crystal display panel more uniform and the brightness higher, the existing backlight module usually adopts the method of increasing the light source of the light source assembly to the diffusion space of the closest optical film, or Adopt the way of stacking more different types of optical films. These measures will increase the size of the backlight module in the stacking direction, which does not meet the requirements of thin displays.

Therefore, an object of the present invention is to provide a backlight module and a display. The components of the backlight module can be bonded together through adhesive, so that the backlight module can be formed as a whole, thereby simplifying or omitting the settings for the backlight module. The various elements of the frame are superimposed and fastened together.

Another object of the present invention is to provide a backlight module and a display, wherein a plurality of air gaps are formed between two optical films bonded to each other in the backlight module, so as to serve as a light scattering medium, so that the light energy can be mixed more uniformly.

In order to achieve the above and other purposes, an embodiment of the present invention provides a backlight module, comprising: at least one first optical film and at least one second optical film, stacked along an axis, the first optical film Different from the type of the second optical film, one side of the first optical film is provided with an array of convex objects; and at least one adhesive layer is used for the second optical film to adhere to the first optical film. The array of protruding objects has an air gap between each adjacent two protruding objects of the array of protruding objects adhered to the second optical film.

In some embodiments, the array of convex objects is a microlens array or a hexagonal array.

In some embodiments, the second optical film is a diffuser film, a reflective polarizer or a quantum dot film.

In some embodiments, the number of the at least one adhesive layer is at least two, the backlight module further includes a light source component, wherein one of the adhesive layers is used for adhering the second optical film to the first optical film , wherein the other adhesive layer is used for adhering the light source component to the first optical film or the second optical film.

In some embodiments, the number of the at least one first optical film is at least two, the number of the at least one adhesive layer is at least two, and one of the adhesive layers is used for two of the first optical films The other adhesive layer is used for adhering one of the two first optical films to the second optical film.

In some embodiments, the backlight module is a direct type backlight module or an edge type backlight module.

In addition, the present invention provides a display including the above-mentioned backlight module according to an embodiment.

Please refer to FIG. 1 , the backlight module 2 provided by the present invention is suitable for being assembled into a display 1 . The display 1 can be, for example, but not limited to, a liquid crystal display, a Micro LED display or a Mini LED display. The display 1 mainly includes a display panel 3 and the backlight module 2 . The display panel 3 and the backlight module 2 can be superimposed along an axis D. The backlight module 2 can be, for example, but not limited to, a direct type backlight module.

The backlight module 2 includes a light source assembly 10 , an optical film assembly 20 and at least two adhesive layers 30 (eg, but not limited to, adhesive layers 31 and 32 ). The optical film assembly 20 is located between the light source assembly 10 and the display panel 3 . The adhesive layer 30 can be, for example, but not limited to, an adhesive film or a coating made of an adhesive.

In this embodiment, the light source assembly 10 may include a plurality of light emitting elements 11 and a reflection sheet 12 . The reflective sheet 12 is disposed below the light emitting element 11 , and the light emitting element 11 is located between the reflective sheet 12 and the optical film assembly 20 , so that the light emitted by the light emitting element 11 and traveling downward can be reflected upward to the optical film assembly 20 . The light source assembly 1 is adhered to the optical film assembly 20 through the adhesive layer 31 .

The optical film assembly 20 includes at least one first optical film 21 and at least one second optical film 22 . These optical films can be stacked along the axial direction D and bonded to each other through the adhesive layer 32 . The types of the first optical film 21 and the second optical film 22 are different. The first optical film 21 may be, for example, but not limited to, a brightness enhancement film. The second optical film 22 is a diffusion film, a reflective polarizer or a quantum dot film.

A convex object array 211 is disposed on one side of the first optical film 21 . The vertices 213 of the plurality of convex objects 212 of the convex object array 211 of the first optical film 21 can be adhered to the second optical film 22 through the adhesive layer 32 , and thus the first optical film 22 is adhered to the second optical film 22 . There is an air gap AIR between each adjacent two convex objects 212 of the diaphragm 21 . The air in the air gap AIR can act as a light scattering medium, making the light energy mix more evenly, and can also help reduce the number of stacks of optical films. The convex object array 211 can be, for example, a microlens array or a lens array.

In this way, a plurality of optical films are bonded to each other to form the optical film assembly 20 through the adhesive layer 32 , and the optical film assembly 20 is bonded to the light source assembly 10 through the adhesive layer 31 , so that each element of the backlight module 2 can be The frame body that is tightly joined into a whole and used to superimpose and fasten the components of the backlight module 2 together can be simplified or omitted. In addition, these adhesive layers 30 can also serve as a medium for light scattering, so that the light energy can be mixed more uniformly. Therefore, it also helps to reduce the number of stacks of optical films.

In one embodiment, as shown in FIG. 1 , the optical film assembly 20 has a first optical film 21 , a second optical film 22 , an adhesive layer 31 and an adhesive layer 32 . A surface 214 of the first optical film 21 away from the convex object array 211 can be adhered to the light source assembly 10 through an adhesive layer 31 , and each vertex 213 of the convex object array 211 of the first optical film 21 can pass through an adhesive The layer 32 is adhered to a surface 221 of the second optical film 22 .

In another embodiment, the optical film assembly 20 shown in FIG. 1 can be modified as shown in FIG. 2 , a surface 221 of the second optical film 22 is adhered to the light source assembly 10 through an adhesive layer 31 , and the second optical film 22 is adhered to the light source assembly 10 through an adhesive layer 31 . A surface 222 of the optical film 22 opposite to the surface 221 can be adhered to a surface 214 of the first optical film 21 away from the convex object array 211 through an adhesive layer 32 .

In yet another embodiment, the optical film assembly 20 shown in FIG. 1 can also be modified to include a first optical film 21 , two second optical films 22 , an adhesive layer 31 and two optical films as shown in FIG. 3 . an adhesive layer 32 . The first optical film 21 is located between the two second optical films 22 . A surface 221 of the second optical film 22 below (ie closer to the light source assembly 10 ) is adhered to the light source assembly 10 through an adhesive layer 31 , and a surface 222 of the second optical film 22 opposite to the surface 221 passes through a The adhesive layer 32 is adhered to a surface 214 of the first optical film 21 away from the convex object array 211 . Each vertex 213 of the convex array 211 of the first optical film 21 is adhered to a surface 221 of the second optical film 22 above (ie, closer to the display panel 3 ) through another adhesive layer 32 .

In yet another embodiment, the optical film assembly 20 shown in FIG. 3 can also be modified to include two first optical films 21 , two second optical films 22 , an adhesive layer 31 and Three adhesive layers 32 . The two first optical films 21 are located between the two second optical films 22 . A surface 221 of the lower second optical film 22 is bonded to the light source assembly 10 through an adhesive layer 31 , and a surface 222 of the lower second optical film 22 opposite to the surface 221 is bonded to the lower one through an adhesive layer 32 . The first optical film 21 is away from a surface 214 of the convex object array 211 . Each vertex 213 of the convex object array 211 of the lower first optical film 21 is adhered to a surface 214 of the upper first optical film 21 away from the convex object array 211 through another adhesive layer 32 . Each vertex 213 of the convex object array 211 of the upper first optical film 21 is adhered to a surface 221 of the upper second optical film 22 through another adhesive layer 32 .

In this creation, the number and configuration of the first optical film 21 , the second optical film 22 and the adhesive layer 30 in the optical film assembly 20 are not limited to the examples exemplified in FIGS. 1 to 4 , but can be based on actual needs to be designed.

The optical film assembly 20 provided in the above embodiments is applied to a direct type backlight module, so the light source assembly 10 is disposed directly below the optical film assembly 20, but the present invention is not limited to this type of backlight module. In other embodiments, the optical film assembly 20 can also be modified to be applied to an edge-lit backlight module. For the structure and configuration of the light source components of the edge-lit backlight module, reference may be made to existing or known edge-lit backlight modules. The light source component of the edge light type backlight module can also be bonded with the above-mentioned first optical film or the second optical film through an adhesive layer, so that the components of the edge light type backlight module can be tightly combined into a whole. Further, the frame body provided for superimposing and fastening the components of the backlight module together is simplified or omitted.

Although the present invention is disclosed in the foregoing embodiments, these embodiments are not intended to limit the present invention. Without departing from the spirit and scope of this creation, the alterations, modifications and combinations of various implementation forms are all within the scope of patent protection of this creation. For the protection scope defined by this creation, please refer to the attached patent application scope.

1: Display 2: Backlight module 3: Display panel 10: Light source components 20: Optical film components 21: The first optical film 211: Convex Array 212: Convex 213: Vertex 214: Surface 22: The second optical film 221, 222: Surface 30,31,32: Adhesive layer AIR: air gap D: Axial

Other aspects of the present invention and its advantages will be discovered upon study of the detailed description in conjunction with the following drawings: 1 to 4 are schematic diagrams of displays including backlight modules provided according to different embodiments of the present invention.

1: Display

2: Backlight module

3: Display panel

10: Light source components

11: Light-emitting element

12: Reflector

20: Optical film components

21: The first optical film

211: Convex Array

212: Convex

213: Vertex

214: Surface

22: The second optical film

221, 222: Surface

30,31,32: Adhesive layer

AIR: air gap

D: Axial

Claims (7)

A backlight module, comprising: At least one first optical film and at least one second optical film are stacked along an axial direction, the first optical film and the second optical film are of different types, and one side of the first optical film is provided with a an array of protrusions; and At least one adhesive layer for adhering the second optical film to the convex object array of the first optical film, and adhering to each adjacent two convex shapes of the convex object array of the second optical film There is an air gap between the objects. The backlight module according to claim 1, wherein the array of convex objects is a microlens array or a zirconium array. The backlight module according to claim 1, wherein the second optical film is a diffusion film, a reflective polarizer or a quantum dot film. The backlight module according to claim 1, wherein the number of the at least one adhesive layer is at least two, the backlight module further comprises a light source component, wherein one of the adhesive layers is used for the second optical film to be adhered to In the first optical film, the other adhesive layer is used for adhering the light source component to the first optical film or the second optical film. The backlight module according to claim 1, wherein the number of the at least one first optical film is at least two, the number of the at least one adhesive layer is at least two, and one of the adhesive layers is used for two of them. The first optical films are adhered to each other, and the other adhesive layer is used for adhering one of the two first optical films to the second optical film. The backlight module according to claim 1, wherein the backlight module is a direct type backlight module or an edge type backlight module. A display, comprising the backlight module according to claim 1.

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