TWI806395B - Backlight module and display device - Google Patents

Abstract

A backlight module includes an optical unit and a frame structure. The frame structure includes a back plate for carrying the optical unit and an outer frame for coupling with the back plate. The outer frame has a side wall that surrounding the optical unit. The side wall is provided with at least one first limiting part extending toward one side of the optical unit. A reflective Sheet having a second limiting part which is not covered by the optical unit. Wherein, the first limiting part of the outer frame limits the second limiting part of the reflective Sheet. The invention also provides a display device including the backlight module.

Description

Backlight module and display device

The present invention mainly relates to a backlight module, and in particular relates to a backlight module in which a mechanism for limiting a reflector is integrated into a frame structure, and a display device using the backlight module.

Liquid crystal display devices, as display components of electronic equipment, have been widely used in various electronic products at present. The backlight module of the liquid crystal display device has a reflector for reflecting light. The conventional assembly method of the backlight module is to stick the reflector to the back panel through double-sided adhesive tape, and even to limit the position of the reflector through other mechanical components other than the frame structure such as the plastic frame and the back cover.

However, in this conventional assembling method, it is necessary to open a mold of the mechanical part in advance to manufacture the mechanical part; then, the assembler assembles and fixes the reflector through the mechanical part and the double-sided adhesive tape, so that the conventional assembling method has The need for mold opening of the mechanical components creates additional production cost problems. In addition, the conventional assembly method not only takes a long time to assemble, but also after challenging tests, the reflective sheet and the backplane are easily due to the stickiness of the double-sided adhesive Weaken and cause the reflective sheet to warp and not fit properly, resulting in poor optical quality.

In view of this, it is necessary to provide a backlight module to solve the above problems.

The purpose of the present invention is to provide a backlight module, which can have a frame structure integrated with mechanical components for limiting the reflection sheet.

Another object of the present invention is to provide a display device that can have the above-mentioned backlight module.

To achieve the above object, the present invention provides a backlight module, comprising: an optical unit; a frame structure having a back plate for carrying the optical unit, and an outer frame combined with the back plate, the outer frame has Surrounding the side wall section of the optical unit, the side wall section is provided with at least one first limiting portion extending toward one side of the optical unit; and a reflective sheet with a second limiting portion, the second limiting portion A portion is not covered by the optical unit, wherein the first limiting portion of the outer frame limits the second limiting portion of the reflective sheet.

The present invention further provides a display device, comprising: the aforementioned backlight module; and a display panel, located on the light emitting side of the backlight module, wherein the outer frame of the frame structure further includes a bearing section, and the bearing section is supported by the side The wall section extends toward the optical unit, and the display panel is arranged on the carrying section.

In some embodiments, the back plate includes a body portion for carrying the optical unit, and at least one extension portion extending from one end of the body portion toward one side of the optical unit, the extension portion and the side wall section Overlaid on each other, the extension part has at least one first through hole, and the first stop part presses the second stop part of the reflective sheet through the corresponding first through hole, so as to be in common with the main body part of the back plate. The reflective sheet is pressed.

In some embodiments, the back plate includes a body portion for carrying the optical unit, and an extension portion extending from one end of the body portion toward one side of the optical unit, the extension portion has at least one first through hole , the reflection sheet includes a base, and a side extending from the base along the inner side of the extension, the second limiting portion is at least one second perforation, the side, the extension and the side wall section Overlaid on each other, the first limiting portion sequentially passes through the corresponding first through hole and the second through hole.

In some embodiments, the end of the first limiting portion forms a hook portion.

In some embodiments, the second through hole is disposed between the base and the side.

In some embodiments, the second through hole is disposed on the side portion.

In some embodiments, there is a gap between the side portion of the reflection sheet and the extension portion, and the gap is used as an adjustment margin between the side portion of the reflection sheet and the extension portion.

In some embodiments, the length of the first limiting portion is greater than the sum of the thickness of the side portion of the reflective sheet, the thickness of the extension portion, and the gap.

In some embodiments, the optical unit further includes a light-emitting mechanism and at least one optical film, the reflective sheet abuts the light-emitting mechanism, and the light-emitting mechanism is located between the back plate and the at least one optical film.

In some embodiments, the optical unit further includes a light guide plate, the light guide plate is located between the reflective sheet and the at least one optical film, and the light emitting mechanism is arranged on one side of the light guide plate, the first stop The part is arranged on the side of the frame structure not corresponding to the light-emitting mechanism.

In some embodiments, the length of the carrying section is greater than the length of the first limiting portion.

The backlight module and the display device of the present invention have the following features: the first limiting portion can partially extend from the outer frame, and the first limiting portion presses the second limiting portion of the reflective sheet. In this way, the backlight module and the display device of the present invention can reduce the number of adhesive tapes or other parts used to bond and fix the reflective sheet, thereby reducing the man-hours of traditional production and assembly steps such as pasting or flattening the reflective sheet, and through Using the structural design of the first limiting portion partially extended from the outer frame and the back plate to jointly press the reflector to simplify the assembly process, save the cost of adhesive tape, increase the production efficiency of the production line, save the outer frame and The cost of the backplane combined with the material, and the reduction of manpower, material resources and time costs during the assembly process of the backlight module, and even the need for heavy industry in the future, because the reflector only passes through the limit of the first limit part , so there is no problem of difficulty in rework or loss of rework due to double-sided adhesive sticking. Therefore, the backlight module and display device of the present invention also have the effects of high module combination stability and reworkability.

The embodiments of the present invention are described in detail below in conjunction with the drawings. The attached drawings are mainly simplified schematic diagrams, which only schematically illustrate the basic structure of the present invention. Therefore, only components related to the present invention are marked in these drawings. , and the displayed components are not drawn according to the number, shape, size ratio, etc. of the actual implementation. The actual size of the actual implementation is a selective design, and the layout of the components may be more complicated.

The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be practiced. The direction terms mentioned in the present invention, such as "upper", "lower", "front", "rear", etc., are only directions referring to the attached drawings. Therefore, the directional terms used are used to illustrate and understand the application, but not to limit the application. Also, in the specification, unless it is clearly described to the contrary, the word "comprising" will be understood as meaning including the stated elements, but not excluding any other elements.

Please refer to FIG. 1, which is a first embodiment of the backlight module of the present invention, including: an optical unit 1, a frame structure 2 and a reflector 3, and the frame structure 2 is used to carry the optical unit 1 , the reflective sheet 3 abuts against the frame structure 2 , and the part of the reflective sheet 3 not covered by the optical unit 1 can be limited by the frame structure 2 .

The backlight module of the present invention can be divided into a direct type backlight module and an edge type backlight module according to the lighting method. In this embodiment, a direct type backlight module is taken as an example for illustration. The optical unit 1 includes a light emitting mechanism 11 and at least one optical film 12 . The light emitting mechanism 11 is located behind the at least one optical film 12 .

The frame structure 2 includes a back plate 21 and an outer frame 22, wherein the back plate 21 is used to carry the optical unit 1, and the outer frame 22 is combined with the back plate 21. Preferably, the outer frame 22 is arranged on The edge of the backboard 21, in this embodiment, the backboard 21 is made of metal material, and the outer frame 22 is made of plastic material (PVC).

Specifically, the outer frame 22 includes a side wall section 221, the side wall section 221 surrounds the optical unit 1, and is provided with at least one first limiting portion 222 extending toward the side of the optical unit 1, in an implementation In an example, the first limiting portion 222 is a rod extending along a first axis A1, but it is not limited thereto.

The reflective sheet 3 includes a second limiting portion L. In this embodiment, the second limiting portion L of the reflective sheet 3 is a part of the reflective sheet 3 not covered by the optical unit 1 . The second limiting portion L of the piece 3 can be pressed by the first limiting portion 222 of the outer frame 22 . In this embodiment, the first limiting portion 222 presses the second limiting portion L toward a second axis A2, and the second axis A2 is where the reflective sheet 3 faces the back plate 21. direction. In this way, the reflection sheet 3 of the backlight module of the present invention can be pressed by the first limiting portion 222, that is, it is not necessary to use adhesive tape (such as double-sided tape) to bond and fix the back plate 21, which can save The consumption cost of the adhesive tape is low, and at the same time, the man-hours of traditional production and assembly steps such as sticking or flattening the reflective sheet are reduced, so as to increase the production efficiency of the production line. At the same time, because there is no need to use adhesive tape, it is also convenient for rework, reducing the man-hours of rework and the consumption rate of parts and materials.

On the other hand, since the first limiting portion 222 is partly extended from the outer frame 22 , it can achieve the effect of saving the cost of combining the outer frame 22 and the back plate 21 . Moreover, the structural design of pressing the reflective sheet 3 together with the first limiting portion 222 of the outer frame 22 and the back plate 21 can simplify the assembly procedure, so as to reduce the time spent on manufacturing and assembling the backlight module. The manpower, material resources and time costs that need to be consumed.

Please refer to FIG. 2, which is a second embodiment of the frame structure of the present invention. In this embodiment, the back plate 21 includes a main body portion 211 and at least one extension portion 212, and the extension portion 212 is located on the main body portion. 211 and extend toward one side of the optical unit 1 . The extension portion 212 of the back panel 21 and the side wall section 221 of the outer frame 22 overlap each other, which can improve the combination stability of the back panel 21 and the outer frame 22 . Wherein, the extension portion 212 of the back plate 21 has at least one first through hole 213, and the first limiting portion 222 of the outer frame 22 passes through the corresponding first through hole 213 of the back plate 21 to press the reflection sheet 3 The second limiting portion L is used to press the reflective sheet 3 together with the main body portion 211 of the back plate 21 . Therefore, this embodiment can be applied to the implementation of the backplane with the extension. Moreover, because the hole diameter of the first through hole 213 can be designed to be greater than the thickness of the reflective sheet 3, when the first limiting portion 222 passes through the corresponding first through hole 213 of the back plate 21, it can be adjusted to The height of the first through hole 213 is suitable for the reflection sheet 3 with various thicknesses.

Please refer to FIG. 3, which is a third embodiment of the frame structure of the present invention. Compared with the first embodiment, in this embodiment, the back plate 21 includes a main body portion 211 and at least one extension portion. 212 , the extension portion 212 is located at one end of the body portion 211 and extends toward one side of the optical unit 1 . The extension portion 212 of the back panel 21 and the side wall section 221 of the outer frame 22 overlap each other, and the extension portion 212 of the back panel 21 has at least one first through hole 213 .

The reflection sheet 3 includes a base 31 and a side portion 32, the side portion 32 extends from the base 31 along the inner side of the extension 212 of the back plate 21, so that the base 31 of the reflection sheet 3 can Together with this side part 32, light is reflected uniformly. The side portion 32 , the extension portion 212 and the side wall section 221 overlap each other along the first axis A1 .

In this embodiment, the second limiting portion L of the reflective sheet 3 is at least one second through hole 321 , wherein the second through hole 321 is preferably relatively disposed between the base portion 31 and the side portion 32 , In this way, the first limiting portion 222 of the outer frame 22 sequentially passes through the corresponding first through hole 213 of the back plate 21 and the second through hole 321 of the reflective sheet 3 to be pressed onto the reflective sheet 3 The base 31 can effectively limit the position of the reflection sheet 3 . Therefore, this embodiment can be applied to the implementation of the backplane with the extension part and the reflection sheet with the side part.

It is worth mentioning that there may be a gap G between the side portion 32 and the extension portion 212, and the gap G is used as a gap between the side portion 32 of the reflection sheet 3 and the extension portion 212 of the back plate 21. An adjustment margin, the width of which is sufficient to accommodate thermal expansion and contraction of the reflective sheet 3 along the first axis A1. Furthermore, the length of the first limiting portion 222 is greater than the sum of the thickness of the side portion 32, the thickness of the extension portion 212, and the gap G, so as to ensure that the end of the first limiting portion 222 can be effectively pressed against the reflection The base 31 of the sheet 3 . Thereby, in this embodiment, the margin between the assembly of the reflection sheet 3 and the backplane 21 can be reserved, and it is ensured that there is sufficient heat between the reflection sheet 3 and the backplane 21 after the challenge test. The expansion and contraction space is to avoid the risk of the reflective sheet 3 being wrinkled (waving) and reducing the optical quality.

Please refer to Figures 4 and 5, which is a fourth embodiment of the frame structure of the present invention. Compared with the third embodiment, in this embodiment, the end of the first limiting portion 222 can also form a A hook portion 223 , the extension direction of the hook portion 223 is different from the direction of the first axis A1 . In this embodiment, the second limiting portion L of the reflective sheet 3 is the at least one second through hole 321, wherein the second through hole 321 is preferably disposed between the base portion 31 and the side portion 32, so The first limiting portion 222 of the outer frame 22 passes through the first through hole 213 corresponding to the back plate 21 and the second through hole 321 of the reflective sheet 3 in sequence, not only through the hook portion 223 The side portion 32 of the reflective sheet 3 is effectively limited between the hook portion 223 and the extension portion 212 of the back plate 21, and can also be pressed to the base portion 31 of the reflective sheet 3 at the same time to effectively restrict the reflective sheet 3. s position. For example, the end of the first limiting portion 222 can extend in a direction different from the first axis A1 to form the hook portion 223 , but not limited thereto. In this embodiment, the hook portion 223 extends along the second axis A2 relative to the front direction of the optical unit 1 . Preferably, the end of the first limiting portion 222 can also face toward the rear of the optical unit 1 , or toward the sky side or the ground side of the outer frame 22 .

Please refer to FIG. 6, in another embodiment, the second through hole 321 of the reflective sheet 3 can also be set on the side portion 32, and the hook portion 223 can also limit the side portion 32 of the reflective sheet 3. Between the hook portion 223 and the back plate 21 , it is easier to insert the second through hole 321 of the reflective sheet 3 into the hook portion 223 during the assembly process. In addition, because the reflective sheet 3 is limited only by the hook portion 223 of the first limiting portion 222, if there is a need for heavy work in the future, there will be no difficulty in rework or wear and tear caused by sticking, so this embodiment also has a module Combining stability with high reworkability.

Please refer to FIG. 7 , which is a preferred embodiment of the display device of the present invention, including: the aforementioned backlight module and a display panel 4 , and the display panel 4 is located on the light emitting side of the backlight module. Wherein, the outer frame 22 of the frame structure 2 may further include a bearing section 224 extending from the sidewall section 221 toward the optical unit 1 . The display panel 4 is disposed on the supporting section 224 . It is worth mentioning that the length of the carrying section 224 is greater than the length of the first limiting portion 222 . In this way, the outer frame 22 can be directly used as an appearance part of the display device, and can cover the first limiting part 222 located below, thereby achieving the effect of greatly reducing the volume of the overall display device. In addition, it can also reduce the need for additional appearance parts The assembly time is reduced, so as to achieve the effects of reducing the number of parts, reducing the assembly time of parts, and reducing costs.

FIG. 7 takes a side-type backlight module as an example for illustration. The optical unit 1 may also include a light guide plate 13, the light guide plate 13 is located between the reflector 3 and the at least one optical film 12, and the light emitting mechanism 11 The reflective sheet 3 is arranged in alignment with the light incident surface of the light guide plate 13 and abuts against the light guide plate 13 of the light emitting mechanism 11 . In one embodiment, the light-emitting mechanism 11 is a light bar disposed between the light guide plate 13 and the frame structure 2, and the aforementioned first limiting portion 222 is preferably used for a non-contact portion of the edge-type backlight module. light side. Therefore, this embodiment can be applied to the implementation of the side-lit backlight module.

Based on the above, the backlight module and display device of the present invention can partially extend the first limiting portion from the outer frame, and make the first limiting portion press the second limiting portion of the reflective sheet . In this way, the backlight module and the display device of the present invention can reduce the number of adhesive tapes or other parts used to bond and fix the reflective sheet, thereby reducing the man-hours of traditional production and assembly steps such as pasting or flattening the reflective sheet, and through Using the structural design of the first limiting portion partially extended from the outer frame and the back plate to jointly press the reflector to simplify the assembly process, save the cost of adhesive tape, increase the production efficiency of the production line, save the outer frame and The cost of the backplane combined with the material, and the reduction of manpower, material resources and time costs during the assembly process of the backlight module, and even the need for heavy industry in the future, because the reflector only passes through the limit of the first limit part , so there is no problem of difficulty in rework or loss of rework due to double-sided adhesive sticking. Therefore, the backlight module and display device of the present invention also have the effects of high module combination stability and reworkability.

The embodiments disclosed above are only illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of the present invention. Any person familiar with the art can, without departing from the spirit and scope of the present invention, Modifications and changes are made to the above-mentioned embodiments. Any equivalent change and modification accomplished by using the content disclosed in the present invention should still be covered by the scope of the following patent application.

1: Optical unit 11: Lighting mechanism 12: Optical film 13: Light guide plate 2: frame structure 21: Backplane 211: Body Department 212: Extension 213: First piercing 22: Outer frame 221: side wall section 222: The first limit part 223: hook 224: bearer segment 3: reflector 31: base 32: side 321:Second perforation 4: Display panel G: Gap L: The second limit part A1: first axis A2: Second axis

[Fig. 1] is a partial cross-sectional view of a backlight module according to a first embodiment of the present invention; [Fig. 2] is a partial sectional view of a backlight module according to a second embodiment of the present invention; [Fig. 3] is a partial sectional view of a backlight module according to a third embodiment of the present invention; [FIG. 4] is an enlarged partial cross-sectional view of a backlight module according to a fourth embodiment of the present invention; [Fig. 5] is a partial perspective view of the backlight module of the fourth embodiment of the present invention; [ FIG. 6 ] is an enlarged partial cross-sectional view of the display device of the present invention; [ FIG. 7 ] is a cross-sectional view of a backlight module using side-lit lighting according to the present invention.

1: Optical unit 11: Lighting mechanism 12: Optical film 2: frame structure 21: Backplane 22: Outer frame 221: side wall section 222: The first limit part 3: reflector A1: first axis A2: Second axis L: The second limit part

Claims (11)

A backlight module, comprising: an optical unit; a frame structure, having a back plate for carrying the optical unit, and an outer frame combined on the outside of the back plate, the back plate includes a frame for carrying the optical unit A main body, and at least one extension located at one end of the main body extending toward one side of the optical unit, the outer frame has a side wall section surrounding the optical unit, and the side wall section is provided with a At least one first limiting part extending sideways, the extending part overlaps with the side wall segment, the extending part has at least one first through hole; A limiting part, the second limiting part is not covered by the optical unit, wherein the first limiting part of the outer frame presses the second limiting part of the reflective sheet through the corresponding first perforation , so as to jointly press the reflective sheet with the main body of the back plate. The backlight module as described in claim 1, wherein the optical unit further includes a light emitting mechanism and at least one optical film, the reflector abuts the light emitting mechanism, and the light emitting mechanism is located between the back plate and the at least one optical film between slices. The backlight module according to claim 2, wherein the optical unit further includes a light guide plate, the light guide plate is located between the reflective sheet and the at least one optical film, and the light emitting mechanism is arranged on one side of the light guide plate On the side, the first limiting portion is disposed on a side of the frame structure that does not correspond to the light emitting mechanism. A backlight module, comprising: an optical unit; a frame structure having a back plate for carrying the optical unit, and an outer frame combined with the back plate, the outer frame has a side wall surrounding the optical unit A segment, the side wall segment is provided with at least one first limiting portion extending toward one side of the optical unit; and A reflective sheet has a second limiting portion, the second limiting portion is not covered by the optical unit, wherein the first limiting portion of the outer frame limits the second limiting portion of the reflecting sheet, Wherein, the back plate includes a body portion for carrying the optical unit, and an extension portion extending from one end of the body portion toward one side of the optical unit, the extension portion has at least one first through hole, and the reflection sheet It includes a base portion, and a side portion extending from the base portion along the inner side of the extension portion, the second limiting portion is at least one second through hole, the side portion, the extension portion and the side wall section are stacked on each other, The first limiting portion sequentially passes through the corresponding first through hole and the second through hole. The backlight module as claimed in claim 4, wherein a hook is formed at the end of the first limiting portion. The backlight module as claimed in claim 4, wherein the second through hole is disposed between the base and the side. The backlight module as claimed in claim 4, wherein the second through hole is disposed on the side portion. The backlight module according to claim 4, wherein there is a gap between the side of the reflection sheet and the extension, and the gap is used as an adjustment margin between the side of the reflection sheet and the extension . The backlight module according to claim 8, wherein the length of the first limiting portion is greater than the sum of the thickness of the side portion of the reflective sheet, the thickness of the extension portion, and the gap. A display device, comprising: a backlight module as described in claims 1 to 9; and a display panel, located on the light-emitting side of the backlight module, wherein the outer frame of the frame structure further includes a bearing section, and the bearing section Extending from the sidewall section toward the optical unit, the display panel is arranged on the carrying section. The display device according to claim 10, wherein the length of the carrying section is greater than the length of the first limiting portion.

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