Abstract: A backlight driving circuit includes a light driving unit, which includes a constant current unit, and a light source operated by the constant current unit. The light driving unit further includes a feedback control unit and a detection circuit. The detection circuit detects the light source and outputs at least a voltage feedback signal to the feedback control unit. The feedback control unit obtains a prestored power parameter corresponding to the voltage feedback signal and outputs an adjusting signal to the constant current unit to adjust the constant current of the light source.

Abstract: An exemplary liquid crystal display includes a liquid crystal panel and a backlight module facing the liquid crystal panel. The backlight module includes a light guide plate, a light source and an accommodating frame accommodating the liquid crystal panel, the light guide plate and the light source. The accommodating frame includes a plurality of side walls. The side walls define an absorbing portion and a reflecting portion thereat. The absorbing portion is adjacent to the liquid crystal panel and is configured for absorbing light beams leaking from a periphery of the liquid crystal panel. The reflecting portion is adjacent to the light guide plate and is configured for reflecting light beams leaking from at least one peripheral portion of the light guide plate.

Abstract: An exemplary backlight module (2) includes a light guide plate (23), a light source (25), a light source driver (27), and a frame (21). The light source is provided adjacent to the light guide plate. The light source driver is directly connected with the light source. The frame includes an upper frame (211) and a lower frame (212). The upper frame and the lower frame cooperatively form a space to accommodate the light guide plate, the light source, and the light source driver.

Abstract: A backlight driving circuit includes a light driving unit, which includes a constant current unit, and a light source operated by the constant current unit. The light driving unit further includes a feedback control unit and a detection circuit. The detection circuit detects the light source and outputs at least a voltage feedback signal to the feedback control unit. The feedback control unit obtains a prestored power parameter corresponding to the voltage feedback signal and outputs an adjusting signal to the constant current unit to adjust the constant current of the light source.

Abstract: An exemplary liquid crystal display includes a liquid crystal panel and a backlight module facing the liquid crystal panel. The backlight module includes a light guide plate, a light source and an accommodating frame accommodating the liquid crystal panel, the light guide plate and the light source. The accommodating frame includes a plurality of side walls. The side walls define an absorbing portion and a reflecting portion thereat. The absorbing portion is adjacent to the liquid crystal panel and is configured for absorbing light beams leaking from a periphery of the liquid crystal panel. The reflecting portion is adjacent to the light guide plate and is configured for reflecting light beams leaking from at least one peripheral portion of the light guide plate.

Abstract: An exemplary backlight module (2) includes a light guide plate (23), a light source (25), a light source driver (27), and a frame (21). The light source is provided adjacent to the light guide plate. The light source driver is directly connected with the light source. The frame includes an upper frame (211) and a lower frame (212). The upper frame and the lower frame cooperatively form a space to accommodate the light guide plate, the light source, and the light source driver.

Abstract: An exemplary mold for manufacturing different-sized plastic frames simultaneously includes a first mold half and a second mold half. The first and second mold halves cooperatively define a first molding chamber and a second molding chamber, and the first molding chamber surrounds the second molding chamber.

Abstract: An exemplary backlight module (2) includes a light guide plate (21) and a light source (20). The light guide plate includes a body (211) and a protrusion (212) extending from the body. The body includes a light emitting surface (2111) and a side surface (2112) adjacent the light emitting surface. The light source includes a wire (22) which is disposed in a space defined between the side surface and the protrusion. The backlight module is compact with a reduced length.

Abstract: An exemplary liquid crystal display (2) has a liquid crystal panel (50) and a backlight module (20) being disposed under the liquid crystal panel, the backlight module has a light guide plate (21), and a light source having at least one point light source (23), at least one light guide bar (22) transmitting light beams from the at least one point light source, and a reflector (24) reflecting light beams from the at least one light guide bar into the light guide plate.

Abstract: An exemplary backlight module includes a light guide plate (12), an illuminator (14), and a frame (16) receiving the light guide plate and the illuminator. The light guide plate includes a light incident surface (122) and has a cutout defined in a corner thereof at one end of the light incident surface. The illuminator is located adjacent to the light incident surface. The frame includes a stopper (166) engagingly received in the cutout such that the stopper blocks movement of the light guide plate toward the illuminator.

Abstract: An exemplary light guide plate (20) includes a transparent body (21) having a major surface (24) and a light diffusing structure (28) coated or embossed on the major surface of the transparent body. The light diffusing layer makes light beams emitting out from the light guide plate more uniform. Therefore the backlight module does not need a thick light diffusing plate. This means the backlight module is thin, assembly of the backlight module is simplified, and costs are reduced.

Abstract: An exemplary backlight module (2) includes a light guide plate (21) and a light source (20). The light guide plate includes a body (211) and a protrusion (212) extending from the body. The body includes a light emitting surface (2111) and a side surface (2112) adjacent the light emitting surface. The light source includes a wire (22) which is disposed in a space defined between the side surface and the protrusion. The backlight module is compact with a reduced length.

Abstract: A backlight module (5) includes a light guide plate (51) and a light source (52). The light guide plate includes a first light incident surface (510), a second light incident surface (512) adjacent the first light incident surface. The first light incident surface and the second light incident surface cooperatively define a first groove (54) therebetween. The light source is disposed in the first groove. With this configuration, there is no need for additional space for the light source beyond an end of the light guide plate. Thus an overall length of the backlight module is shortened. Furthermore, a top end (533) of the reflector can be disposed in a second groove (59) defined between two adjacent side surfaces at the end of the light guide plate. Thus an overall height of the backlight module is shortened. The reduced overall length and height of the backlight module makes it compact.