CN110879496B

CN110879496B - Backlight module and liquid crystal display device

Info

Publication number: CN110879496B
Application number: CN201911192649.7A
Authority: CN
Inventors: 顾华
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2022-07-12
Anticipated expiration: 2039-11-28
Also published as: CN110879496A

Abstract

The application discloses a backlight module, which is provided with a blind hole area and a backlight area surrounding the blind hole area, wherein the blind hole area is internally provided with a blind hole, and the blind hole area also comprises a back plate, first fixing glue, an annular Mini-LED lamp strip and a glass cover plate; the first fixing glue is arranged on the side wall of the blind hole on two sides of the blind hole, the annular Mini-LED lamp strip is arranged in the blind hole and is adhered to the side wall of the blind hole through the first fixing glue, and the glass cover plate is in contact with the upper surface of the annular Mini-LED lamp strip; and dimming glass is further arranged in the blind hole, and two ends of the dimming glass are respectively contacted with the lower surface of the annular Mini-LED lamp strip and are respectively adhered to the side wall of the blind hole through the first fixing glue. The application also discloses a liquid crystal display device prepared by using the backlight module.

Description

Backlight module and liquid crystal display device

Technical Field

The application relates to the technical field of display, in particular to a backlight module and a liquid crystal display device.

Background

With the rapid market development of the full-face screen, the bang screen and the water drop screen are taken as representatives, the bang screen and the water drop screen gradually occupy the mainstream of the market, and a higher screen occupation ratio is mainly pursued. The development idea is to dig a hole on the screen and place a front camera. The effective display area is enlarged, and the screen occupation ratio of the display screen is improved; in addition, the size of the non-display area can be reduced, so that the total size of the display screen is effectively reduced, a user can hold the display screen conveniently, and the user experience is improved. At present, in order to pursue an extremely full screen, a special-shaped cutting screen becomes a mainstream solution, and from notch design to latest blind hole design, corresponding special-shaped cutting is required to be carried out on a backlight part so as to obtain device spaces such as a camera, an inductor and the like, so that the screen cannot achieve a full screen in a true sense.

In summary, in the conventional backlight module and the liquid crystal display device, the blind hole design needs to be performed to obtain the space of the devices such as the camera and the sensor due to the requirement of pursuing a higher screen occupation ratio, so that the screen cannot reach a full screen in a true sense, and the display effect of the full screen is further influenced.

Disclosure of Invention

The embodiment of the application provides a backlight unit and liquid crystal display device, can make the through-hole in a poor light can freely convert the backlight when providing the device space, realize two unifications in the two, in order to solve current backlight unit and liquid crystal display device, carry out the blind hole design owing to need pursue higher screen and account for the ratio, in order to obtain device spaces such as camera, inductor, thereby lead to the screen can't reach the most all-round screen in the true sense, further influenced the technical problem of the display effect of all-round screen.

In order to solve the above problems, the technical scheme provided by the invention is as follows:

the embodiment of the application provides a backlight module, which is provided with a blind hole area and a backlight area surrounding the blind hole area, wherein the blind hole area is internally provided with a blind hole, and the blind hole area further comprises a back plate, first fixing glue, an annular Mini-LED lamp strip and a glass cover plate;

the first fixing glue is arranged on the side wall of the blind hole on two sides of the blind hole, the annular Mini-LED lamp strip is arranged in the blind hole and is adhered to the side wall of the blind hole through the first fixing glue, and the glass cover plate is in contact with the upper surface of the annular Mini-LED lamp strip; and dimming glass is further arranged in the blind hole, and two ends of the dimming glass are respectively contacted with the lower surface of the annular Mini-LED lamp strip and are respectively adhered to the side wall of the blind hole through the first fixing glue.

In some embodiments, a camera is further disposed in the blind hole, the camera is located below the light control glass, and a light incident side of the camera faces the light control glass.

In some embodiments, when the backlight module is in a charging state, the light adjusting glass is in a transparent state, the annular Mini-LED lamp strip is in a non-lighting state, and the camera views a view normally through the light adjusting glass.

In some embodiments, when the backlight module is in a non-charging state, the light adjusting glass is in a white atomized state, the annular Mini-LED lamp strip is in a light emitting state, and light emitted by the annular Mini-LED lamp strip is reflected to the outside through the light adjusting glass.

In some embodiments, the first fixing glue is black glue.

In some embodiments, the backlight area further comprises the back plate, a backlight source, a light guide plate, an optical film layer, a middle frame, and the glass cover plate.

In some embodiments, the optical film layer further includes a prism film and a diffusion film.

The embodiment of the application also provides a liquid crystal display device which comprises the backlight module.

In some embodiments, the liquid crystal display device further includes a liquid crystal display panel located above the backlight module, and the liquid crystal display panel further includes a TFT array substrate, a second fixing adhesive, a first ITO layer, a liquid crystal layer, a second ITO layer, a third fixing adhesive, and a color film substrate, which are disposed from bottom to top.

In some embodiments, the second fixing glue and the third fixing glue are made of EVA glue.

According to the backlight module and the liquid crystal display device, the annular Mini-LED lamp strip and the dimming glass are arranged in the backlight blind hole, so that the backlight blind hole can be freely converted into a backlight source while providing a device space, and the display effect of a full screen is further improved.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic cross-sectional structure view of a backlight module according to an embodiment of the present application.

Fig. 2 is a schematic view of a light path of the backlight module in the power-on state according to the embodiment of the present disclosure.

Fig. 3 is a schematic view of a light path of the backlight module according to the embodiment of the present application when the backlight module is in a non-power-on state.

Fig. 4 is a schematic cross-sectional view of a liquid crystal display panel in a liquid crystal display device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application aims at the existing backlight module and the existing liquid crystal display device, and blind hole design is carried out due to the fact that higher screen occupation ratio is required to obtain device spaces such as a camera and an inductor, so that a screen cannot reach a full screen in a real sense, the technical problem of the display effect of the full screen is further influenced, and the defect can be solved by the embodiment of the application.

Fig. 1 is a schematic cross-sectional view illustrating a backlight module according to an embodiment of the disclosure. The backlight module 10 is provided with a blind hole area 11 and a backlight area 12 surrounding the blind hole area 11, and a blind hole is formed in the blind hole area 11, and the backlight module is characterized in that the blind hole area 11 further comprises a back plate 13, first fixing glue 111, an annular Mini-LED lamp strip 112 and a glass cover plate 14;

the first fixing glue 111 is arranged on the side wall of the blind hole on two sides of the blind hole, the annular Mini-LED lamp strip 112 is arranged in the blind hole and is bonded to the side wall of the blind hole through the first fixing glue 111, and the glass cover plate 14 is in contact with the upper surface of the annular Mini-LED lamp strip 112; and dimming glass 113 is further arranged in the blind hole, and two ends of the dimming glass 113 are respectively in contact with the lower surface of the annular Mini-LED lamp strip 112 and are respectively bonded to the side wall of the blind hole through the first fixing glue 111.

Specifically, the first fixing paste 111 is preferably black paste.

Specifically, the annular Mini-LED strip 40 is composed of a plurality of LED (light emitting diode) chips with a size of about 100 μm × 100 μm, has the advantages of high color saturation, local dimming, high brightness, energy saving, and the like, can be applied to a backlight display, and has become a recent research focus. Specifically, a camera 114 is further disposed in the blind hole, the camera 114 is located below the light control glass 113, and a light incident side of the camera 114 faces the light control glass 113.

Specifically, the backlight area 12 further includes the back plate 13, a backlight source 121, a light guide plate 122, an optical film layer, a middle frame 125, and the glass cover plate 14. Wherein the optical film layer further includes a prism film 123 and a diffusion film 124.

Fig. 2 is a schematic view of a light path of the backlight module according to the embodiment of the present disclosure in a power-on state. When the backlight module is in a charging state, the dimming glass 113 is energized and excited to be in a transparent state, the annular Mini-LED lamp strip 112 is not energized and is in a non-luminous state, the external light 30 is emitted into the camera 114 through the dimming glass 113, and the camera 114 can normally view the image through the emitted external light 30 without influencing shooting.

Fig. 3 is a schematic view of a light path when the backlight module according to the embodiment of the present application is in a non-power-on state. When the backlight module is in a non-charging state, the light adjusting glass 113 is in a white atomization state and can serve as a temporary white reaction, namely, the light adjusting glass is equivalent to a reflecting plate; at this time, the ring Mini-LED strip 112 is powered on, and is in a light-emitting state; the light emitted from the annular Mini-LED strip 112 is reflected to the front surface of the liquid crystal display panel above the backlight module 10 through the light adjusting glass 113, so as to provide a light source for the display frame of the liquid crystal display panel. At this time, the camera 114 is in a backlight state because light is not received, and the camera 114 does not operate.

The embodiment of the application also provides a liquid crystal display device prepared by using the backlight module 10, and the liquid crystal display device further comprises a liquid crystal display panel positioned above the backlight module 10.

Fig. 4 is a schematic cross-sectional view of a liquid crystal display panel in a liquid crystal display device according to an embodiment of the present application. The liquid crystal display panel 50 further includes a TFT array substrate 51, a second fixing adhesive 52, a first ITO layer 53, a liquid crystal layer 54, a second ITO layer 55, a third fixing adhesive 56, and a color filter substrate 57. Specifically, the backlight module 10 is disposed on a side close to the TFT array substrate 51.

Specifically, the TFT array substrate 51 includes a plurality of TFTs (thin film transistors), and the TFTs are used to actively control devices of each pixel, so that a field effect transistor is designed on each pixel.

Specifically, the basic structure of the Color Substrate 57 (Color filter, CF for short) is composed of a Glass Substrate (Glass Substrate), a Black Matrix (Black Matrix), a Color Layer (Color Layer), and a protective Layer (Over Coat). The color substrate 57 is an optical filter that represents colors that precisely select light waves in a small range of wavelengths to be passed, while reflecting other undesired wavelengths.

Specifically, the first ITO layer 53 and the second ITO layer 55 are common electrodes of the liquid crystal display panel 50, and the first ITO layer 53 and the second ITO layer 55 are made of ITO (indium tin oxide).

Specifically, the second fixing glue 52 and the third fixing glue 56 are special adhesives for gluing optical elements in the liquid crystal display panel 50; the second fixing glue 52 and the third fixing glue 56 are preferably EVA (Polyethylene vinyl acetate) glue. The EVA adhesive is a thermosetting adhesive film and is used for being placed in the middle of laminated glass. Because of its superiority in adhesion, durability, optical characteristics, etc., EVA film is more and more widely used in current components and various optical products.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The backlight module and the liquid crystal display device provided by the embodiments of the present application are described in detail above, and the principle and the implementation manner of the present application are explained in the present application by applying specific examples, and the description of the embodiments above is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. The utility model provides a backlight module, backlight module has the blind hole region and centers on the regional area in a poor light of blind hole, the blind hole has seted up the blind hole in the blind hole region, its characterized in that still includes in the blind hole region:

a back plate;

the first fixing glue is arranged on the side walls of the blind holes at two sides of the blind hole;

the annular Mini-LED lamp strip is arranged in the blind hole and is adhered to the side wall of the blind hole through the first fixing glue;

the glass cover plate is in contact with the upper surface of the annular Mini-LED lamp strip;

the LED lamp strip is characterized in that dimming glass is further arranged in the blind hole, and two ends of the dimming glass are respectively in contact with the lower surface of the annular Mini-LED lamp strip and are respectively adhered to the side wall of the blind hole through the first fixing glue;

the camera is arranged in the blind hole and located below the dimming glass, and the light incident side of the camera faces the dimming glass.

2. The backlight module according to claim 1, wherein a camera is further disposed in the blind hole, the camera is located below the light control glass, and a light incident side of the camera faces the light control glass.

3. The backlight module according to claim 2, wherein the light control glass is transparent when the backlight module is in a charging state, the ring-shaped Mini-LED strip is not illuminated, and the camera views the image normally through the light control glass.

4. The backlight module according to claim 1, wherein the light-adjusting glass is in a white atomized state when the backlight module is in a non-charging state, the ring-shaped Mini-LED strip is in a light-emitting state, and light emitted from the ring-shaped Mini-LED strip is reflected to the outside through the light-adjusting glass.

5. The backlight module as claimed in claim 1, wherein the first fixing glue is black glue.

6. The backlight module according to claim 1, wherein the backlight area further comprises the back plate, a backlight source, a light guide plate, an optical film layer, a middle frame and the glass cover plate.

7. The backlight module as claimed in claim 6, wherein the optical film layer further comprises a prism film and a diffusion film.

8. A liquid crystal display device comprising the backlight module according to any one of claims 1 to 7.

9. The liquid crystal display device of claim 8, further comprising a liquid crystal display panel located above the backlight module, wherein the liquid crystal display panel further comprises a TFT array substrate, a second fixing glue, a first ITO layer, a liquid crystal layer, a second ITO layer, a third fixing glue, and a color film substrate, which are arranged from bottom to top.

10. The lcd apparatus of claim 9, wherein the second fixing glue and the third fixing glue are made of EVA glue.