CN101782699B - Display device with composite backlight module - Google Patents

Abstract

A display device with a composite backlight module comprises an outer frame, a display panel (Cell), at least one optical film, a light-emitting device and the composite backlight module. The composite backlight module is provided with a plurality of connecting structures which are connected with the outer frame to fix and protect the display panel, and the composite backlight module is provided with an accommodating space for accommodating the display panel and the optical diaphragm and a light guide part for guiding the light emitted by the light-emitting device to the light-emitting surface of the composite backlight module. In addition, the composite backlight module is formed by injection molding of the same material. The invention can effectively reduce parts, simplify the manufacturing procedure and achieve the effect of reducing the cost.

Description

Display device with composite backlight module

【Technical field】

The present invention relates to a display device, in particular to a display device with a compound backlight module.

【Background technique】

With the advancement of electronic technology and the prevalence of portable electronic products in daily life, the demand for thin, light, small and low power consumption displays is increasing day by day. Liquid Crystal Display (LCD) is often used in such electronic products due to its advantages of low power consumption, low heat generation and light weight, and has gradually replaced traditional cathode ray tube displays. Since the liquid crystal display panel is a non-self-illuminating device, a backlight module (Backlight) is required to provide evenly distributed light sources. However, in the overall cost of the liquid crystal display module, the backlight module (Backlight) occupies a considerable proportion, and the proportion becomes higher as the size increases. In addition, the components in the backlight module are quite complicated, and each component is a cost burden, and the complexity of the components also increases the complexity of the assembly of the backlight module. Therefore, in addition to reducing the cost of various components, how to effectively reduce the number of components and integrate components to simplify the assembly steps of the backlight module is a topic that various panel manufacturers are eager to study.

Please refer to FIG. 1 , which is an exploded diagram of an existing liquid crystal display module. Among them, the liquid crystal display module is composed of an outer frame (Bezel) 11, a display panel (Cell) 12, an optical film (Film) 13, a plastic frame (Frame) 14, a light guide plate (LGP) 15, a A light emitting device (Light Bar) 16, a reflecting device (Reflector) 17 and a metal back plate (Backcover) 18 are assembled sequentially. In this assembly process, the existing backlight module includes a metal back plate 18, a plastic frame 14 and a light guide plate 15, and the metal back plate 18 and the plastic frame 14 are combined with the outer frame 11 to integrate other internal components. The components are effectively fixed so that the LCD module after this assembly process has the advantages of stable structure and excellent optical quality, but this method lengthens the manufacturing process of the production line due to the large number of components and complicated assembly procedures The difficulty of assembling the backlight module is increased and there are many parts and materials, which increases the cost of materials.

【Content of invention】

In view of various problems in the prior art, in order to be able to solve them, the present invention proposes a display device with a composite backlight module as an implementation method and basis for improving the above-mentioned shortcomings.

In view of this, the object of the present invention is to provide a display device with a composite backlight module, so as to effectively reduce parts, simplify the manufacturing process and reduce the cost.

According to the purpose of the present invention, a liquid crystal display device with a composite backlight module is proposed, which includes an outer frame (Bezel), a display panel (Cell), at least one optical film (Film), and a light emitting device (Light Bar) and a composite backlight module. The outer frame has several first connection structures. The light emitting device is used to provide light source to the display panel. The light emitting device includes at least one light emitting diode and a printed circuit board or cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL). The composite backlight module includes several second connection structures and an accommodating space, and these second connection structures are arranged on the outer side of the composite backlight module to connect the first connection structure on the side of the outer frame. The accommodating space includes a first recess, a second recess and a third recess. The size of the first recess is corresponding to the size of the optical film to accommodate the optical film, and the size of the second recess is corresponding to the size of the display panel to accommodate the display panel. The third recess is located below the second recess and is long and narrow for placing the light emitting device. In addition, the opening area of the second depression is larger than the opening area of the first depression; the opening area of the first depression is larger than the opening area of the third depression. The composite backlight module has a light guide part to guide the light emitted by the light-emitting device to the light-emitting surface of the composite backlight module. Homogeneous light distribution of the panel. The reflection device is located at the bottom of the composite backlight module to reflect the light emitted from the bottom of the composite backlight module so as to improve the utilization rate of light.

The present invention provides a display device with a composite backlight module, which includes: an outer frame with a first connection structure; a display panel; an optical film; a light-emitting device; and a composite backlight module, including : an accommodating space; and a second connection structure; wherein, the display panel, the optical film and the light emitting device are arranged in the accommodating space, and the second connection structure is arranged outside the composite backlight module The side is used to connect the first connection structure, and the composite backlight module is made of the same material.

In addition, the present invention also proposes a display device with a composite backlight module, which is characterized in that the existing light guide plate (LGP), metal backplane (Backcover) and plastic frame (Frame) are combined to form a composite backlight module, and the injection The advantages of molding (that is, the characteristics of various shapes can be injected), effectively integrate the light guide plate (LGP), the metal backplane (Backcover) and the plastic frame (Frame) into one, and all are formed by injection molding. The composite backlight module still has the original mechanism features of each component and effectively simplifies three components into one component. Such a composite backlight module requires only one injection molding process, and the present invention uses the same material to form the composite backlight module, which not only reduces parts and materials, but also simplifies the manufacturing process, thereby achieving the effect of reducing costs.

【Description of drawings】

FIG. 1 is an exploded view of the first component of an existing backlight module component;

2A is an exploded view of an embodiment of a display device with a composite backlight module of the present invention;

2B is a cross-sectional view of the composite backlight module of the display device with the composite backlight module of the present invention;

as well as

FIG. 2C is a schematic diagram of another embodiment of a display device with a composite backlight module of the present invention.

11: Outer frame

12: Display panel

13: Optical film

14: plastic frame

15: Light guide plate

16: Lighting device

17: Reflector

18: Metal backplane

211: The first connection structure

22: Display panel

23: Optical film

24: Lighting device

25: Composite backlight module

251: Second connection structure

252: Accommodating space

2521: first depression

2522: second depression

2523: The third depression

25231: light incident surface

2524: Light guide

26: Reflector

27: first depression

28: second depression

In order to further understand and understand the technical characteristics and achieved effects of the present invention, preferred embodiments and detailed descriptions are provided as follows.

【Detailed ways】

A display device with a composite backlight module according to an embodiment of the present invention will be described below with reference to related drawings. For ease of understanding, the same components in the following embodiments are described with the same symbols.

Please refer to FIG. 2A , which is an exploded view of an embodiment of the display device with composite backlight module of the present invention. In the figure, the display device includes an outer frame 21 (Bezel), a display panel 22 (Cell), at least one optical film 23 (Film), a light emitting device 24 and a composite backlight module 25 . The outer frame 21 has several first connecting structures 211. The light emitting device 24 is used to provide light source to the display panel 22. The light emitting device 24 includes at least one light emitting diode and a printed circuit board. The light emitting device 24 can also be a cold cathode. light tube. The composite backlight module 25 includes several second connecting structures 251 and an accommodating space 252 . Please refer to FIG. 2B , the accommodating space includes a first recessed portion 2521 , a second recessed portion 2522 and a third recessed portion 2523 for accommodating the optical film 23 , the display panel 22 and the light emitting device 24 respectively. In addition, the opening area of the second recessed portion 2522 is larger than the opening area of the first recessed portion 2521 ; the opening area of the first recessed portion is larger than the opening area of the third recessed portion 2523 . In addition, the third recessed portion 2523 is disposed at the bottom of the first recessed portion 2521 for placing the light emitting device 24 . The third recessed portion 2523 is located on one side of the accommodating space 252 and is long and narrow. The size of the first recess 2521 is corresponding to the size of the optical film 23 so as to accommodate the optical film 23 and stabilize the position of the optical film 23, and the second recess 2522 is corresponding to the size of the display panel 22 so as to accommodate the display panel 22 and stabilize it. The position of the display panel 22 is designed so that the display panel 22 and the optical film 23 are not easily damaged due to displacement due to impact or impact. The composite backlight module 25 has a light guide portion 2524 to guide the light emitted by the light emitting device 24 to the light emitting surface of the composite backlight module 25. The light emitting surface is a side corresponding to the display panel and located at the bottom of the first concave portion and It is integrally formed with the composite backlight module, and the light is uniformized through the optical film 23 to provide uniform light distribution on the display panel 22 . Please refer to FIG. 2B , one side surface of the third concave portion 2523 is the light incident surface 25231 of the light guiding portion 2524 . The composite backlight module 25 is formed by injection molding of a transparent material such as acrylic resin. The optical film 23 includes a diffusion film and at least one prism film. Furthermore, the optical film 23 is located under the display panel, the light guide part 2524 is located under the optical film 23, and the light-emitting device 24 is arranged on the side of the composite backlight module 25. In this way, the light-emitting device 24 The emitted light passes through the light guide portion 2524 and the optical film 23 to form uniform light and is incident on the display panel 22 . The second connection structure 251 is connected to the first connection structure 211 so that the outer frame 21 can firmly cover the composite backlight module 25 to protect the internal structure of the display device. Please refer to FIG. 2A again, the display device further includes a reflector 26, and its structure may include a bottom and at least one side. As shown in FIG. 2A, the reflector 26 may be a box-shaped structure. The reflector 26 is located at the bottom of the composite backlight module 25 and its periphery to reflect the light emitted towards the bottom of the composite backlight module 25, so as to prevent the light emitted by the light emitting device 24 from emitting from the bottom of the composite backlight module 25, and improve the light utilization rate to The luminance of the display panel 22 is increased. The reflection device 26 can be pasted on the bottom of the composite backlight module 25 with double-sided tape or combined with the bottom of the composite backlight module 25 in other ways. In addition, although the reflector 26 of this embodiment is described as a box-shaped structure, it is not limited thereto. In another embodiment, the reflector 26 can also be designed as a sheet-like structure, that is, it does not Contains sides like a box structure.

The present invention integrates a light guide plate (LGP), a metal back cover (Backcover) and a plastic frame (Frame) into one component to form a composite backlight module 25 . The composite backlight module 25 is made of the same material by using injection molding (that is, it can inject characteristics of various shapes), and effectively integrates the light guide plate (LGP), the metal back plate (Backcover) and the plastic frame ( Frame) and other three parts are integrated into one part. The composite backlight module 25 still has the functions and strengths of the original three components and effectively simplifies the three components into one component. Such a composite backlight module requires only one injection molding process, and the present invention uses the same material to form the composite backlight module, which not only reduces parts and materials, but also simplifies the manufacturing process, thereby achieving the effect of reducing costs.

Please refer to FIG. 2C , which is a schematic diagram of another embodiment of the display device with composite backlight module of the present invention. In the figure, the composite backlight module includes a first recessed portion 27 and a second recessed portion 28, wherein the first recessed portion 27 is used to place a display panel and an optical film, and the second recessed portion 28 is used to place a light emitting diode. The device is long and narrow (as shown in the figure) and the area of the opening area of the first recessed part 27 is larger than the area of the opening area of the second recessed part 28 . The composite backlight module 25 has a light guide part, wherein the light incident surface of the light guide part 2524 is constituted by one side surface of the second recessed part, and the main light emitting surface of the light guide part is the side surface of the first recessed part. The bottom surface constitutes, that is, the light emitting surface of the light guide part is a surface corresponding to the display panel. The composite backlight module 25 can be formed by injection molding of transparent materials such as acrylic resin. In this way, the light emitted by the light-emitting device can enter the light guide of the composite backlight module through one side surface of the second recess (the light incident surface of the light guide), and finally pass through the bottom surface of the first recess (the light guide surface). The light emitting surface of the light part) is led out, and then the light is uniformized through the optical film, so as to provide a uniform light distribution on the display panel 22 . The composite backlight module 25 has several second connection structures 251, and the second connection structures 251 are connected with the first connection structure of the outer frame. The composite backlight module 25 effectively integrates the light guide plate (LGP), the metal back cover (Backcover) and the plastic frame (Frame) into one component to form the composite backlight module 25 . The composite backlight module 25 still has the functions and strengths of the original three components and effectively simplifies the three components into one component. Such a composite backlight module 25 omits complicated manufacturing steps, and the present invention utilizes the same material to form the composite backlight module by injection molding, which not only reduces parts and materials, but also simplifies the manufacturing process and achieves the effect of reducing costs.

The above descriptions are illustrative only, not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the patent application.

Claims (9)

1. A display device with a composite backlight module, comprising: an outer frame with a first connecting structure; a display panel; an optical film; a lighting device; and A composite backlight module, including: a housing space; and a second connection structure; Wherein, the display panel, the optical film and the light emitting device are arranged in the accommodating space, the second connection structure is arranged on the outer side of the composite backlight module to connect the first connection structure, and The composite backlight module is made of the same material, and the composite backlight module has a light guide part to guide the light emitted by the light-emitting device to the light-emitting surface of the composite backlight module. 2. The display device with composite backlight module as claimed in claim 1, wherein the composite backlight module is formed by injection molding. 3. The display device with a composite backlight module as claimed in claim 1, further comprising a reflector, which is located at the bottom and the periphery of the composite backlight module to reflect light towards the bottom of the composite backlight module. emitted light. 4. The display device with composite backlight module as claimed in claim 3, wherein the reflecting device comprises a bottom and at least one side, 5. The display device with composite backlight module as claimed in claim 4, wherein the reflecting device is a box-shaped structure. 6 . The display device with a composite backlight module as claimed in claim 1 , wherein the accommodating space includes a first recess, a second recess and a third recess. 7 . The display device with a composite backlight module as claimed in claim 6 , wherein an opening area of the second recess is larger than an opening area of the first recess. 8 . The display device with a composite backlight module as claimed in claim 6 , wherein an opening area of the first recess is larger than an opening area of the third recess. 9. The display device with a composite backlight module as claimed in claim 1, wherein the composite backlight module is formed by injection molding of a transparent material.

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