Light bar and display device

A light bar includes a circuit board, a plurality of light emitting units, a connector and a frame module. The light emitting units are disposed on the circuit board. The connector is disposed on the circuit board. The frame module includes a plurality of frames arranged side by side. Each of the frames includes an accommodating recess. The circuit board is accommodated in the accommodating recess of each frame. The connector is located between a first end and a second end of the frame module, wherein the first end is opposite to the second end.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a light bar and, more particularly, to a light bar equipped with a frame module consisting of a plurality of frames and a display device equipped with the light bar.

2. Description of the Prior Art

Referring toFIG. 1,FIG. 1is a schematic top view illustrating a liquid crystal display device3of the prior art. Since the liquid crystal display device3has advantages of light weight, thin thickness, low power consumption and no radiation pollution, it has been applied in various electronic devices including notebook computer, computer screen, television, and so on. However, since the liquid crystal display device3is not an active light emitting display device, it needs to utilize a backlight module30to provide light for displaying images. In general, the backlight module30uses a light bar to be a light source. The conventional light bar disposes a circuit board in an accommodating recess of one single frame and disposes a connector34, which is connected to a system board32, at an edge of the circuit board. To accommodate the system board32, a back casing36of the liquid crystal display device3must have a thick middle portion with a curved shape. If the connector34is located beside the light bar, the edge of the back casing36also has to accommodate the connector34, such that the whole thickness of the liquid crystal display device3increases and it is disadvantageous to miniaturize the liquid crystal display device3.

SUMMARY OF THE INVENTION

An objective of the invention is to provide a light bar equipped with a frame module consisting of a plurality of frames and a display device equipped with the light bar, so as to solve the aforesaid problems.

According to an embodiment of the invention, a light bar comprises a circuit board, a plurality of light emitting units, a connector and a frame module. The light emitting units are disposed on the circuit board. The connector is disposed on the circuit board. The frame module comprises a plurality of frames and the frames are arranged side by side. Each of the frames comprises an accommodating recess. The circuit board is accommodated in the accommodating recess of each frame. The connector is located between a first end and a second end of the frame module, wherein the first end is opposite to the second end.

According to another embodiment of the invention, a light bar comprises a circuit board, a plurality of light emitting units, a connector and a frame module. The light emitting units are disposed on the circuit board. The connector is disposed on the circuit board. The frame module is configured to accommodate the circuit board. The frame module comprises a first frame and a second frame. The first frame has a first end, a third end and a first accommodating recess, wherein the third end is opposite to the first end and the first accommodating recess is disposed between the first end and the third end. The second frame is connected to the first frame. The second frame has a second end, a fourth end and a second accommodating recess, wherein the fourth end is opposite to the second end and connected to the third end, and the second accommodating recess is disposed between the second end and the fourth end. The circuit board is accommodated in the first accommodating recess and the second accommodating recess, and the connector is located between the third end and the fourth end.

According to another embodiment of the invention, a display device comprises a backlight module, a display module, a system board and a back casing. The backlight module comprises a light bar and a light guide plate. The light bar comprises a circuit board, a plurality of light emitting units, a connector and a frame module. The light emitting units and the connector are disposed on the circuit board. The frame module comprises a first frame and a second frame. The first frame has a first end, a third end and a first accommodating recess, wherein the third end is opposite to the first end and the first accommodating recess is disposed between the first end and the third end. The second frame is connected to the first frame. The second frame has a second end, a fourth end and a second accommodating recess, wherein the fourth end is opposite to the second end and connected to the third end, and the second accommodating recess is disposed between the second end and the fourth end. The circuit board is accommodated in the first accommodating recess and the second accommodating recess, and the connector is located between the third end and the fourth end. An edge of the light guide plate is disposed in the first accommodating recess and the second accommodating recess and adjacent to the light emitting units. The display module is disposed at a first side of the backlight module and the system board is disposed at a second side of the backlight module, wherein the first side is opposite to the second side. The connector is connected to the system board. The back casing is disposed at the second side of the backlight module and covers the system board.

As mentioned in the above, the light bar of the invention is equipped with the frame module consisting of a plurality of frames. Accordingly, the invention can dispose the connector, which is connected to the system board, at any portion (e.g. middle portion) of the circuit board according to mechanical structure of the display device and then insert opposite ends of the circuit board into the accommodating recesses of different frames, respectively, so as to form the frame module by the frames. When the backlight module and the back casing are assembled, the connector of the light bar can be accommodated in a curved space of a thick middle portion of the back casing. Since the connector is not located at an edge of the light bar, the thickness of the edge of the back casing does not need to increase to accommodate the connector. Accordingly, the whole thickness of the display device can be reduced effectively, such that the invention is advantageous to miniaturize the display device.

DETAILED DESCRIPTION

Referring toFIGS. 2 to 5,FIG. 2is a schematic top view illustrating a display device1according to an embodiment of the invention,FIG. 3is a perspective view illustrating a light bar110according to an embodiment of the invention,FIG. 4is a perspective view illustrating the light bar110shown inFIG. 3from another viewing angle, andFIG. 5is an exploded view illustrating the light bar110shown inFIG. 3.

The backlight module10may comprise a front bezel100, an optical film assembly102, a light guide plate104, a reflective sheet106, a back plate108and a light bar110(as shown inFIGS. 3 to 5). In this embodiment, the display module12may be assembled to the front bezel100of the backlight module10and the back casing16may be assembled to the back plate108of the backlight module10. The optical film assembly102may comprise lots of optical films including a prism film, a diffusing film, and so on according to practical applications.

As shown inFIGS. 3 to 5, the light bar110comprises a circuit board1100, a plurality of light emitting units1102, a connector1104and a frame module1106. In this embodiment, the light bar1100may comprise two connectors1104, but is not so limited. In practical applications, the number of connectors1104may be one or more. The light emitting units1102and the connectors1104are disposed on the circuit board1100. In practical applications, the light emitting units1102may be light emitting diodes or other light sources. In this embodiment, the circuit board1100may comprise a protruding portion1108and the connectors1104may be disposed on the protruding portion1108.

The frame module1106comprises a plurality of frames and the frames are arranged side by side. In this embodiment, the frame module1106may comprise a first frame1106aand a second frame1106b. After assembling the light bar110, the first frame1106aand the second frame1106bare arranged side by side, as shown inFIGS. 3 and 4. The first frame1106ahas a first end E1, a third end E3and a first accommodating recess R1, wherein the third end E3is opposite to the first end E1and the first accommodating recess R1is disposed between the first end E1and the third end E3. The second frame1106bhas a second end E2, a fourth end E4and a second accommodating recess R2, wherein the fourth end E4is opposite to the second end E2and the second accommodating recess R2is disposed between the second end E2and the fourth end E4. In this embodiment, a length of the first frame1106amay be equal or unequal to a length of the second frame1106baccording to practical applications.

The invention can dispose the connectors1104, which is connected to the system board14, at any portion (e.g. middle portion) of the circuit board1100according to mechanical structure of the display device1and then insert opposite ends of the circuit board1100into the first accommodating recesses R1of the first frame1106aand the second accommodating recesses R2of the second frame1106b, respectively, so as to form the frame module1106by the first frame1106aand the second frame1106b. Since the first frame1106aand the second frame1106bare assembled to the circuit board1100from opposite ends, the connectors1104located at any portion (e.g. middle portion) of the circuit board1100do not interfere with the first frame1106aand the second frame1106b.

After assembling the light bar110, the fourth end E4of the second frame1106bis connected to the third end E3of the first frame1106a. At this time, the circuit board110is accommodated in the first accommodating recess R1of the first frame1106aand the second accommodating recess R2of the second frame1106b, and the connectors1104are located between the third end E3of the first frame1106aand the fourth end E4of the second frame1106b. Furthermore, since the first end E1of the first frame1106aand the second end E2of the second frame1106bare the first end E1and the second end E2of the frame module1106, the connectors1104are also located between the first end E1and the second E2of the frame module1106.

In this embodiment, the edges of the light guide plate104and the reflective sheet106shown inFIG. 2may be disposed in the first accommodating recess R1of the first frame1106aand the second accommodating recess R2of the second frame1106band adjacent to the light emitting units1102. Accordingly, light emitted by the light emitting units1102is guided to the optical film assembly102by the light guide plate104and then passes through the optical film assembly102to the display module12. Furthermore, as shown inFIG. 2, after assembling the display device1, the connector1104is connected to the system board14(e.g. motherboard), so as to control the light bar110through the system board14.

In this embodiment, a projection of the connector1104towards the system board14is located within an area range of the system board14, as shown inFIG. 2. Accordingly, when the backlight module10and the back casing16are assembled, the connector1104can be accommodated in the curved space160of the thick middle portion of the back casing16, together with the system board14. Thus, the thickness of the edge of the back casing16does not need to increase to accommodate the connector1104. Accordingly, the whole thickness of the display device1can be reduced effectively, such that the invention is advantageous to miniaturize the display device1.

As mentioned in the above, the light bar of the invention is equipped with the frame module consisting of a plurality of frames. Accordingly, the invention can dispose the connector, which is connected to the system board, at any portion (e.g. middle portion) of the circuit board according to mechanical structure of the display device and then insert opposite ends of the circuit board into the accommodating recesses of different frames, respectively, so as to form the frame module by the frames. When the backlight module and the back casing are assembled, the connector of the light bar can be accommodated in a curved space of a thick middle portion of the back casing. Since the connector is not located at an edge of the light bar, the thickness of the edge of the back casing does not need to increase to accommodate the connector. Accordingly, the whole thickness of the display device can be reduced effectively, such that the invention is advantageous to miniaturize the display device.