CN101818882A - Light guide plate and back light module - Google Patents

Abstract

The invention provides a light guide plate and a backlight module with the light guide plate. The light guide plate is formed by connecting a plurality of sub-light guide plates through a hinged structure. The light guide plate can be bent to a certain extent along these arc surfaces, so that a light guide plate and a backlight module with a large bending range and not affected by size can be designed.

Description

Light guide plate and backlight module

technical field

The invention relates to a light guide plate and a backlight module with the light guide plate, in particular to a combined light guide plate and the backlight module with the light guide plate.

Background technique

With the development of digital technology, liquid crystal display products have been widely used in all aspects of daily life, and the quality requirements for liquid crystal display (Liquid Crystal Display, LCD) screens are gradually increasing. However, the liquid crystal itself does not emit light, and a light source needs to continuously provide light to enter the display screen to realize image display. In liquid crystal display products, a backlight module is usually selected to provide light.

As shown in FIGS. 1A-1B , FIG. 1A is a schematic side view of a conventional backlight module, and FIG. 1B is a schematic top view of the backlight module shown in FIG. 1A . The backlight module (Backlight Unit, BLU) 100 includes a light source device (Light Source) 101, a light guide plate (Light Guide Plate, LGP) 102, an optical film group (Film Group) 103 and a reflector (Reflector) 104. The light guide plate 102 is a transparent object made of rigid material, and the line light source emitted by the light source device 101 passes through the light guide plate 102 to form a surface light source and transmits to the optical film group 103, so that the liquid crystal panel can display images.

However, in some special applications, the LCD screen will be designed as a non-planar or even flexible and bendable structure. For this kind of LCD, the rigid LGP obviously cannot meet the requirements, so the researchers proposed a flexible material LGP As shown in FIG. 1C , FIG. 1C is a structural schematic diagram of a conventional backlight module equipped with a light guide plate made of a flexible material. Wherein the light guide plate 102' is a transparent object made of a whole piece of flexible material. However, due to technical limitations, this kind of integrated flexible light guide plate cannot be applied to large-sized BLUs, and it cannot achieve large-scale bending, otherwise a large loss of luminance will occur.

Contents of the invention

To solve the above problems, the present invention will provide a light guide plate that can be greatly bent and is not affected by size, and a backlight module with the light guide plate.

The light guide plate provided according to the object of the present invention is composed of a plurality of sub-light guide plates, wherein at least one end surface of each sub-light guide plate has a hinge structure for connection, and the contact surface between two adjacent sub-light guide plates is in a concave-convex fit arc structure.

According to the light guide plate provided by the object of the present invention, the hinged structure includes a connecting bump integrally formed on one side of the end face of the sub-light guide plate; a positioning hole is set on the other side of the end face, wherein the connecting bump is A positioning column is provided to cooperate with the above positioning hole for connection.

According to the light guide plate provided by the object of the present invention, the hinged structure includes a connecting bump integrally formed on one side of the end face of the sub-light guide plate; a positioning post is arranged on the other side of the end face, wherein the connecting bump is A positioning hole is provided for connection with the above-mentioned positioning column.

According to the light guide plate provided by the object of the present invention, the hinged structure includes a pair of positioning holes, which are respectively arranged on both sides of the end surface of the sub-light guide plate; a connecting pin is provided with a pair of positioning posts, wherein the positioning holes match the Positioning posts for connection.

According to the light guide plate provided by the object of the present invention, the middle part of the plug is a movable structure.

According to the light guide plate provided by the object of the present invention, at least one end surface of the sub-light guide plate is a light incident surface, and at least one light source device is arranged on the light incident surface.

According to the light guide plate provided by the object of the present invention, one surface of the sub-light guide plate is a light-emitting surface, on which a group of optical films are arranged; the other surface opposite to the surface is a reflective surface, on which a reflective sheet is arranged .

According to the light guide plate provided by the object of the present invention, at least one end of the light-emitting surface of the sub-light guide plate is provided with a light-shielding tape.

According to another object of the present invention, a backlight module is provided, which includes a plurality of light guide plates as described above; a plurality of light source devices, which are correspondingly arranged on the light incident surfaces of a plurality of sub-light guide plates; and a plurality of groups of optical films, which are correspondingly arranged A plurality of light-emitting surfaces of the light guide plate; a plurality of reflective sheets, correspondingly arranged on the light-reflecting surfaces of the plurality of sub-light guide plates; and a plurality of light-shielding tapes, correspondingly arranged on at least one side of the plurality of light-emitting surfaces of the sub-light guide plates.

According to another object of the present invention to provide a backlight module, the light source device is a light emitting diode, on which a fixing clip is provided for clamping the light emitting diode on the sub-light guide plate.

From the light guide plate and the backlight module of the present invention described above, a plurality of sub-light guide plates are connected through a hinge structure, and at the same time, the contact surfaces of adjacent sub-light guide plates are designed to have a concave-convex matching arc surface structure, so that the two sub-light guide plates It can be rotated along the contact surface, so as to design a light guide plate and a backlight module with a large bending range and not affected by the size.

Description of drawings

1A-1B are schematic structural views of an existing backlight module;

FIG. 1C is a schematic structural diagram of an existing backlight module with a light guide plate made of a flexible material;

2A is a top view of the backlight module of the present invention;

Fig. 2B is a sectional view of line AA in Fig. 2A;

3A is a schematic structural view of a first embodiment of a single sub-light guide plate of the present invention;

FIG. 3B is a schematic structural diagram of two sub-light guide plates in FIG. 3A connected;

4A is a schematic structural view of a single backlight unit of the present invention;

FIG. 4B is a schematic structural diagram of a backlight module composed of a plurality of backlight units in FIG. 4A;

5A is a schematic structural view of a second embodiment of a monolithic light guide plate of the present invention;

FIG. 5B is a schematic structural diagram of two sub-light guide plates in FIG. 5A connected;

FIG. 6 is a schematic structural view of a third embodiment of the sub-light guide plate of the present invention.

Detailed ways

Please refer to FIGS. 2A-2B . FIG. 2A is a top view of the backlight module of the present invention, and FIG. 2B is a cross-sectional view along line AA in FIG. 2A . As shown in the figure, the backlight module 200 has a light source device 210 and a combined light guide plate 220 . Wherein the light source device can be a light bar (Light Bar) made up of a plurality of LEDs, or a light-emitting device such as a single fluorescent tube, which is located on one side of the light guide plate 220; the light guide plate 220 is composed of a plurality of sub-light guide plates 221 Each of the light guide plates has a hinge structure for connection, so that the light guide plate 220 can be bent as a whole, as shown in FIG. 2B . The combined light guide plate of the present invention will be described below in conjunction with specific embodiments.

Please refer to FIG. 3A and FIG. 3B together. FIG. 3A is a schematic structural diagram of a first embodiment of a single sub-light guide plate of the present invention, and FIG. 3B is a schematic structural diagram of two sub-light guide plates in FIG. 3A connected. As shown in the figure, the sub-light guide plate 221 has a concave arc side 2211 and a convex arc side 2212. These two sides can cooperate with the sides of the adjacent sub-light guide plate respectively, so that the contact surface between the two sub-light guide plates can be along a certain line. The arc rotates and still maintains close contact while rotating. On one end surface of the sub-light guide plate 221, a hinged structure for connection is provided, wherein a connection protrusion 2213 is provided on the end surface near the concave arc side 2211, and a positioning hole 2214 is provided on the connection protrusion 2213; the end surface A positioning column 2216 is disposed near the side surface 2212 of the convex arc. When connecting, the positioning post 2216 is fixed through the positioning hole 2214 on the connecting protrusion 2213, so that the two sub-light guide plates can be hinged together, as shown in FIG. 3B .

Please refer to FIG. 4A. FIG. 4A is a schematic structural view of a single backlight unit of the present invention. As shown in the figure, the backlight unit includes the above-mentioned sub-light guide plate 221, light-shielding tape 211, optical film group 212, reflective sheet 213 and at least one The light source device 2101 , the sub-light guide plate 221 further includes a light incident surface 2215 , a light exit surface 2217 and a light reflecting surface 2218 opposite thereto. Wherein the optical film group 212 is arranged on the light-emitting surface 2217, the reflection sheet 213 is arranged on the light-reflecting surface 2218, at least one light source device 2101 is arranged on the side of the light-incoming surface 2215 oppositely, and the light-shielding tape 211 is arranged on the light-emitting surface 2215. The surface 2217 is close to the light incident surface 2215 . Further, in this embodiment, the light source device 2101 is a light emitting diode, and has a fixing clip 2102, which can fix the light emitting diode to the light guide plate. In addition, an accommodating groove 2219 may be provided on the light incident surface 2215 of the light guide plate, so that the light emitting diodes can be more closely attached to the light incident surface 2215, so as to increase the light utilization efficiency of the light source. It is worth noting that in this embodiment, only one end surface of the sub-light guide plate 221 is the light incident surface, but in practical applications, the other end surface can also be designed as the light incident surface according to needs, so as to increase the brightness of the entire backlight unit .

Please refer to FIG. 4B again. FIG. 4B is a schematic structural diagram of a backlight module composed of a plurality of backlight units in FIG. 4A . As shown in the figure, a plurality of backlight units are connected through the hinge structure on the sub-light guide plate to form a set of backlight module 220. The contact surface of each sub-light guide plate can rotate in a certain arc, so that the entire backlight module 220 A bendable structure can also be formed. In practical applications, the size of the backlight module can be adjusted by adding or reducing the number of sub-light guide plates, and the degree of bending can be set according to the needs of actual use. In some cases, the entire backlight module can even be adjusted. The group is bent into a convolution shape.

Please refer to FIGS. 5A-5B . FIG. 5A is a schematic structural view of a second embodiment of a single sub-light guide plate of the present invention, and FIG. 5B is a schematic structural view after two sub-light guide plates in FIG. 5A are connected. As shown in the figure, one end surface of the sub-light guide plate 321 is provided with a hinged structure for connection. The difference from the first embodiment is that a positioning column 3214 is provided on the connection protrusion 3213, and a positioning column 3214 is provided on the other side of the end surface. Positioning holes 3216 are provided. When connecting, the positioning column 3214 on the connecting protrusion 3213 is fixed through the positioning hole 3216, so that the two sub-light guide plates 321 can be hinged together, as shown in FIG. 5B .

Please refer to FIG. 6 again. FIG. 6 is a schematic structural diagram of a third embodiment of the light guide plate of the present invention. As shown in the figure, two adjacent sub-light guide plates 421 are respectively provided with two positioning holes 4214 on both sides of their contact surfaces, and an external pin 4215 with double positioning columns passes through the two positioning holes 4214 to The two light guide plates are connected, and at the same time, the middle part of the pin 4215 is a movable structure, for example, it can rotate around the central axis; or its material is elastic, which can be deformed. In this way, when the two sub-light guide plates rotate along the contact surface, the pin can rotate synchronously.

To sum up, the present invention provides a combined light guide plate and a backlight module having the light guide plate. The light guide plate is composed of a plurality of sub-light guide plates connected by a hinge structure. At the same time, the contact surface of each sub-light guide plate is designed with a concave-convex matching arc surface structure, so that the entire light guide plate can be bent to a certain extent along these arc surfaces to match The application needs of special occasions.

From the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, and the scope of the claims of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the appended claims of the present invention.

Claims (10)

1. LGP, combine by a plural number LGP, it is characterized in that: at least one end face of a described plural number LGP has the articulated structure that connects usefulness, and the contact-making surface between two adjacent sub-LGPs becomes the globoidal structure of concavo-convex cooperation, and this LGP can be rotated along those cambered surfaces.

2. LGP as claimed in claim 1 is characterized in that: described articulated structure comprises the connection projection, is shaped in a side of described sub-LGP end face; Locating hole is arranged at the opposite side of this end face, and wherein this connection projection is provided with reference column, cooperates above-mentioned locating hole to connect.

3. LGP as claimed in claim 1 is characterized in that: described articulated structure comprises the connection projection, is shaped in a side of described sub-LGP end face; Reference column is arranged at the opposite side of this end face, and wherein this connection projection is provided with locating hole, cooperates above-mentioned reference column to connect.

4. LGP as claimed in claim 1 is characterized in that: described articulated structure comprises a pair of locating hole, is arranged at the both sides of described sub-LGP end face respectively; Connect latch, which is provided with a pair of reference column, wherein this locating hole cooperates this reference column to connect.

5. LGP as claimed in claim 4 is characterized in that: the middle part of described latch is movable structure.

6. LGP as claimed in claim 1 is characterized in that: at least one end face of described sub-LGP is an incidence surface, and at least one light supply apparatus is arranged at this incidence surface.

7. LGP as claimed in claim 1 is characterized in that: a surface of described sub-LGP is an exiting surface, which is provided with one group of blooming piece; Another surface opposing with this surface is reflective surface, which is provided with reflector plate.

8. LGP as claimed in claim 7 is characterized in that: at least one side of described sub-LGP exiting surface is provided with shading rubber belt.

9. module backlight is characterized in that comprising:

A plurality of as any described LGP in the claim 1 to 6;

A plurality of light supply apparatuses, correspondence are arranged at the incidence surface of a plural number LGP;

Plural groups blooming piece, correspondence are arranged at the exiting surface of a plural number LGP;

A plurality of reflector plates, correspondence are arranged at the reflective surface of a plural number LGP; And

A plurality of shading rubber belts, correspondence are arranged at least one side of a plural number LGP exiting surface.

10. module backlight as claimed in claim 9 is characterized in that: described light supply apparatus is a light emitting diode, which is provided with tingle, in order to this light emitting diode is clamped on this sub-LGP.

Images