Abstract: The invention discloses a backlight module, a manufacturing method thereof, and an LCD device. A backlight module comprises an LGP; the light emergent surface of the LGP is covered with more than two material layers with different refractive indexes. In the invention, coatings of different refractive indexes are covered on the light emergent surface of the LGP, P light selectively transmitted, S light is reflected to the LGP for being reflected and converted to P light and then is transmitted again. The transmittance of the P light is increased by such repetition. The utilization rate of light energy is increased, and the brightness of LCDs is increased. In addition, that the material layers with different refractive indexes are covered on the light emergent surface of the LGP can be carried out using various processing modes, such as making general adhesive membranes in advance, or directly coating coatings onto the light emergent surface of the LGP, etc.

Abstract: A backlight module comprises: a light emitting device; a light guide plate that has a plurality of light guide prisms; a first prism assembly that comprises a first base body and a plurality of first prisms arranged on the light emergent surface of the first base body; a second prism assembly that comprises a second base body and a plurality of second prisms, wherein the extending direction of the second prisms is vertical to that of the first prisms. By way of the light guide prisms of the light guide plate extending in the parallel direction to the extending direction of the first prisms, the light beam with a large angle propagating through the light guide plate will not be guided out by the prisms near the light incident side, so as to increase the light mixing area and subsequently avoid the presence of alternately dark and bright hotspot.

Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a plurality of lamps; and a ground bar disposed at one side of the lamps, wherein low-voltage sides of the lamps are electrically connected to the ground bar, and the ground bar has a horizontal supporting plane and an alignment plane, and there is a predetermined angle between the horizontal supporting plane and the alignment plane, the horizontal supporting plane is parallel to the lamps, and the low-voltage sides of the lamps are supported on the horizontal supporting plane and abut against the alignment plane. The present invention can improve the assembly accuracy of the backlight module.

Abstract: Aspects relate to a liquid crystal display and a backlight module thereof, wherein said backlight module comprises an aluminum extrusion as well as an LED circuit board arranged on said aluminum extrusion and a light guide plate. The aluminum extrusion is provided with a locating part, which may lie between said LED and said light guide plate and be further butted with a light incidence plane of said light guide plate. By installing a locating part which lies between said LED and said light guide plate on the aluminum extrusion, the backlight module may enable the aluminum extrusion to be provided with the functions of locating the light guide plate and the LED. Certain aspects relate to reducing the locating factor for influencing the light-coupling distance between the LED and the light guide plate so that it guarantees the light coupling efficiency.

Abstract: A direct type backlight unit includes an optical film, a diffusion plate for supporting the optical film, a bottom plate disposed under the diffusion plate, a plurality of light emitted diodes disposed between the diffusion plate and the bottom plate, and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, wherein each support structure is disposed between two adjacent light emitting diodes, a height of each support structure is smaller than a distance between the bottom plate and the diffusion plate. The direct type backlight unit can improve the problem that a dark area occurs on the diffusion plate.

Abstract: A direct-type backlight unit is provided for improving a dark area problem on the diffusion plate. The direct-type backlight unit includes an optical sheet; a diffusion plate for supporting the optical sheet; a bottom plate, disposed below the diffusion plate; a plurality of light emitting devices (LEDs), disposed between the diffusion plate and the bottom plate; a plurality of supporting elements, disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, each supporting element including: a top portion having a light transmissive section through which light emitted by the LEDs pass; and a bottom portion, fixed on the bottom plate.

Abstract: The utility model discloses a backlight module for a liquid crystal display device and a liquid crystal display device. The backlight module comprises an LED and a backplane, wherein the backlight module also comprises a heatsink plate arranged on the outer of the backplane; and the LED is linked with the heatsink plate in the mode of heat conduction. The utility model, by arranging the LED on an extra heatsink plate which is arranged on the outer of the backplane, dissipates outward the heat emitted by the LED through the heatsink plate, lowers the temperature of the backlight cavity, and protects the optical components. At the same time, because the backplane is not directly used to dissipate heat, the gradient of temperature distribution on the backplane is reduced, thus, the gradient of temperature distribution in the backlight cavity is reduced and stress of the backlight cavity induced by the temperature gradient is also reduced.

Abstract: The present invention discloses a light emitting diode (LED) lens, a back light module and a liquid crystal display (LCD) device. A LED lens is of a direct type back light module; the dispersion index of said LED lens is less than 0.1; said dispersion index is: k dispersion = ? A ? ? i ? ? d i d total ? ? ? A ; dA is a microfacet of the main luminous surface of the LED blue chip; di is a solid angle of the incident angle which is just in the critical area when dA light is reflected to the lens; the critical area refers to an area in which light with different wavelengths emitted by the LED is dispersed in the lens; the total solid angle of color separation corresponding to microfacet dA is: ? i ? ? d i ; dtotal is the solid angle of the lens light emergent surface corresponding to any microfacet. The present invention can avoid dispersion phenomenon under the condition of guaranteeing wide luminance.

Abstract: A direct-light type backlight module and a liquid crystal display (LCD) are proposed. The direct-light type backlight module includes a base frame, a light source, a diffuser plate, and a plurality of support pins. The light source is disposed on the base frame. The diffuser plate is disposed on the light source. The plurality of support pins are disposed on the base frame and support the diffuser plate. At least one of the plurality of support pins is made of first transparent materials, or is made of is made of top and bottom connected second transparent materials and opaque materials. Through the abovementioned method, support pin shadow mura could be successfully prevented, and a backlight effect and a display effect could be effectively enhanced when light emitted by the light source shines on the at least one of the plurality of support pins.

Abstract: A liquid crystal display (LCD) and a backlight module thereof are proposed. The backlight module includes a light guide plate (LGP), a first prism sheet, and a second prism sheet. The first prism sheet is disposed on the LGP. The second prism sheet is disposed on the first prism sheet. The first and second prism sheets both include a plurality of prisms. The plurality of prisms of the first prism sheet are perpendicular to a longer side of the LGP. The plurality of prisms of the second prism sheet form an angle with the longer side of the LGP, and the angle measures between 15 and 45 degrees. Since the backlight module and the plurality of prisms of the second prism sheet both form the angle between 15 and 45 degrees with the longer side of the LGP, brightness at a frontal viewing angle is enhanced and a viewing angle becomes wider.

Abstract: A liquid crystal display (LCD) is disclosed. The LCD comprises a front frame, a panel, a plastic frame and an optical film assembly. The panel comprises a display region and a non-display region, and the plastic frame and the front frame cooperate with each other to sandwich the non-display region of the panel therebetween. The plastic frame is formed with a V-groove(s) on a surface thereof that faces towards a light exiting surface of the optical film assembly. In this way, light rays traveling through the optical film assembly to the lower surface of the plastic frame are reflected by the V-groove(s) so as to be mostly concentrated onto the non-display region of the panel and then gradually attenuated to disappear. This can reduce the bright lines appearing in the display region of the panel and, consequently, improve the displaying effect of the whole LCD.

Abstract: The invention relates to an LGP and a back light module thereof, wherein the LGP comprises a light input surface, a bottom surface and a light output surface opposite to the bottom surface, and is characterized in that the bottom surface and/or the light output surface is provided with a plurality of microstructures, distribution rules for microstructures along the direction parallel to the light input surface of the LGP are: the microstructures in the middle of the LGP are closely arranged, and the microstructures on the two sides are sparsely arranged. In the LGP provided in the invention, the light output in the direction parallel to the light input surface can reach the brightness distribution with high middle and low edges, thereby achieving higher efficiency of light energy utilization.

Abstract: A light guide plate as well as a backlight module and a liquid crystal display device which include the light guide plate. The light guide plate comprises a light entrance surface, a light emitting surface connected with the light entrance surface, and a bottom surface disposed oppositely to the light emitting surface. A plurality of V-shaped groove microstructures is disposed on the light entrance surface, a range of a top angle of the V-shaped groove microstructure is from 100 to 130 degrees. Provided technology is easy to be embodied in the industry and a backlight effect with increased uniformity of emitting light is achieved.

Abstract: A manufacturing method of a circuit board structure includes steps of: providing a circuit board which comprising a metal substrate, a metal layer and a dielectric layer disposed between the metal substrate and the metal layer; forming grooves on the circuit board to expose the metal substrate, the dielectric layer and the metal layer; performing a procedure for connecting metal in the grooves so that the metal substrate and the metal layer being in contact with each other. A structure of circuit board comprises a metal substrate, a dielectric layer and a metal layer. The dielectric layer is formed on the metal substrate, and the metal layer is formed on the dielectric layer; wherein the metal substrate and the metal layer can be in contact with each other at an appropriate position by performing a metal connecting procedure.

Abstract: The invention discloses a backlight module, a manufacturing method thereof, and an LCD device. A backlight module comprises an LGP; the light emergent surface of the LGP is covered with more than two material layers with different refractive indexes. In the invention, coatings of different refractive indexes are covered on the light emergent surface of the LGP, P light selectively transmitted, S light is reflected to the LGP for being reflected and converted to P light and then is transmitted again. The transmittance of the P light is increased by such repetition. The utilization rate of light energy is increased, and the brightness of LCDs is increased. In addition, that the material layers with different refractive indexes are covered on the light emergent surface of the LGP can be carried out using various processing modes, such as making general adhesive membranes in advance, or directly coating coatings onto the light emergent surface of the LGP, etc.

Abstract: A light guide plate is an optical transmissive plate and comprises at least one light incident surface for receiving light rays, one light exiting surface intersecting with the light incident surface, and one bottom surface opposite to the light exiting surface and formed with a plurality of grooves. The grooves are arranged perpendicularly to the light incident surface for adjusting a distance between a first grooves near the light incident surface and the light incident surface. Since a distance between the first microstructure near the light incident surface and the light incident surface is adjusted without modifying the light coupling distance, the hot-spot phenomenon can be reduced without increasing the cost of the light guide plate. Other grooves are arranged at increasing density and are slightly different for improving uniformity of the light rays outputted and luminance of the backlight module comprising the light guide plate.

Abstract: The present invention discloses a light emitting diode (LED) lens, a back light module and a liquid crystal display (LCD) device. A LED lens is of a direct type back light module; the dispersion index of said LED lens is less than 0.1; said dispersion index is: k dispersion = ? A ? ? i ? ? d i d total ? ? ? A ; dA is a microfacet of the main luminous surface of the LED blue chip; di is a solid angle of the incident angle which is just in the critical area when dA light is reflected to the lens; the critical area refers to an area in which light with different wavelengths emitted by the LED is dispersed in the lens; the total solid angle of color separation corresponding to microfacet dA is: ? i ? ? d i ; dtotal is the solid angle of the lens light emergent surface corresponding to any microfacet. The present invention can avoid dispersion phenomenon under the condition of guaranteeing wide luminance.

Abstract: A liquid crystal display (LCD) is disclosed. The LCD comprises a front frame, a panel, a plastic frame and an optical film assembly. The panel comprises a display region and a non-display region, and the plastic frame and the front frame cooperate with each other to sandwich the non-display region of the panel therebetween. The plastic frame is formed with a V-groove(s) on a surface thereof that faces towards a light exiting surface of the optical film assembly. In this way, light rays traveling through the optical film assembly to the lower surface of the plastic frame are reflected by the V-groove(s) so as to be mostly concentrated onto the non-display region of the panel and then gradually attenuated to disappear. This can reduce the bright lines appearing in the display region of the panel and, consequently, improve the displaying effect of the whole LCD.

Abstract: An LED packaging structure includes a casing, an LED chip, and a lead frame arranged in the casing, The lead frame includes a bottom portion, and a first metal side wall and a second metal side wall respectively located on two sides of said bottom portion. The LED chip is arranged on the bottom portion. Plastic layers with high reflectivity are respectively disposed on surfaces of the first metal side wall and the second metal side wall are provided with and are extended towards the direction far away from the bottom portion and joint with the casing. The LED packaging structure of the present disclosure not only provides a longer path for the moisture to permeate the inside of the LED packaging structure, but also reduces the loss of the luminous flux due to light emitted from the LED chip irradiating on the metal bracket.

Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a plurality of lamps; and a ground bar disposed at one side of the lamps, wherein low-voltage sides of the lamps are electrically connected to the ground bar, and the ground bar has a horizontal supporting plane and an alignment plane, and there is a predetermined angle between the horizontal supporting plane and the alignment plane, the horizontal supporting plane is parallel to the lamps, and the low-voltage sides of the lamps are supported on the horizontal supporting plane and abut against the alignment plane. The present invention can improve the assembly accuracy of the backlight module.