The utility model relates to the field of liquid crystal displays, in particular to a backlight module and a liquid crystal display (LCD) using the backlight module.
At present, with the development of industry chain and reduction of costs, liquid crystal displays become main products in the display market. Liquid crystal itself does not illuminate. Therefore, each liquid crystal display is provided with a backlight source, and the backlight source scatters through a light guide plate to provide homogeneous white light for liquid crystal panels. Existing light guide plates are in an integratedly formed structure. Liquid crystal displays have varying sizes, so it is necessary to design and manufacture a corresponding light guide plate for each size of the liquid crystal displays. Therefore, the existing light guide plates have disadvantages of low efficiency, high cost, inconvenient production and assembly in an overall cutting mode, particularly for large liquid crystal displays, wastes of leftover materials and material cost increase.
The utility model aims to provide a backlight module comprising a low-cost and flexibly-assembled light guide plate, and a liquid crystal display using the backlight module.
The aim of the utility model is achieved by the following technical schemes:
A backlight module comprises a light guide plate and a clamp for fixing the light guide plate. The light guide plate is formed by splicing of more than two sub-light guide plates.
Preferably, the clamp is provided with bayonets, the ends of the sub-light guide plates are provided with lugs for fitting the bayonets of the clamp, and the sub-light guide plates are fixed on the clamp by fitting of the lugs and the bayonets. Fitting of the lugs and the bayonets is favorable for standardized design of the light guide plate and the clamp.
Preferably, side walls of the bayonets are presented as a wedge bevel, and the top of each bayonet is wider than the bottom. The side walls of the wedge bayonets are presented as a bevel. After the lugs of the sub-light guide plates are arranged in the bayonets, the sub-light guide plates can generate a horizontal component on the bevels under the pressure of other structures, such as an upper rubber frame, a liquid crystal display module, etc., to ensure close splicing of two adjacent sub-light guide plates.
Preferably, the lugs comprise necks and heads, the necks of the lugs are connected with the sub-light guide plates and are fitted with the bayonets of the clamp, the width the necks of the lugs corresponds to that of the bayonets of the clamp, and the heads of the lugs are wider than the necks of the lugs. The necks of the lugs are narrower than the heads to form a hook structure. The structure can prevent the lugs from separating from the bayonets in a horizontal direction after the sub-light guide plates are arranged in the bayonets.
Preferably, two side walls of the bayonets are of a bevel, bottoms of the bayonets are of a plane, and the bottoms and the side walls form an obtuse angle; the sides of the necks of the lugs fitted with the bayonets, which are tangent with the side walls of the bayonets, are of a corresponding bevel; the sides of the necks of the lugs fitted with the bayonets, which are tangent with the bottoms of the bayonets, are of a plane; the included angle formed by the bevel and the plane of the necks of the lugs are the same as the included angle formed by the bottoms and side walls of the bayonets. Faying surfaces of the lugs and the bayonets are corresponding to each other, so the stress is more well-distributed, and abrasion is avoided due to too high stress in partial areas.
Preferably, each of the sub-light guide plates has two lugs which connect with the clamp on one end of the sub-light guide plate, the two lugs are respectively arranged on two corners at one end of the sub-light guide plate, two adjacent lugs of the two adjacent sub-light guide plates are respectively fitted with a bayonet of the clamp, and the side walls of the two mutually tangent lugs are of a close-fitting plane. Two adjacent lugs of the two sub-light guide plates are spliced in the same bayonet, so close splicing of two adjacent sub-light guide plates can be achieved more easily.
Preferably, the bayonets are in the shape of a right-angled trapezoid, and the top of each bayonet is wider than the bottom; the bottoms of the bayonets are of a plane, the side wall on one end is of a bevel, and the side wall on the other end is of a plane vertical to the bottom; the bevel and the bottom form an obtuse angle, and the bevels of all the bayonets keep on the same side; each side of sub-light guide plates fixed on the clamp has one lug, each lug is corresponding to one bayonet, and the lugs are of the same shape as the bayonets. The design of a lug can realize simpler design of the sub-light guide plates to reduce manufacture cost of the sub-light guide plates.
Preferably, the clamp also comprises a strip base plate and a baffle, the baffle is vertically arranged on one side of the base plate, the other side of the base plate is provided with clips, and two adjacent clips form the bayonet. The side walls at the two ends of the clips are used to form the natural bayonets, so cost is low.
Preferably, the backlight module used for the LCD has LED lights, and the LED lights are equidistantly arranged on the baffle. The LED lights are arranged on the clamp to make use of space of the backlight module more reasonably and reduce volume of the backlight module. The equidistant installation of LED lights can enable the light guide plate to scatter more homogeneous light.
Preferably, the backlight module for the LCD comprises LED lights arranged on the baffle, and the clips comprise paired blocks; the blocks of the adjacent clips form the bayonets, the two blocks in the clips form notches, and the LED lights are arranged in positions corresponding to the notches. The LED lights are corresponding to the notches, so clearances between the clips and the baffle can be fully utilized, and width of the frame of the backlight module can be reduced.
A liquid crystal display comprises a liquid crystal panel and the aforementioned backlight module.
The backlight module used for the LCD of the utility model is characterized in that sub-light guide plates of modular design are used, and the light guide plate applicable to any sizes of the LCD can be formed by splicing of the sub-light guide plates. The backlight module has advantages of convenient processing and assembly, productivity improvement, material waste reduction and backlight module cost decrease.
Wherein: 1, clamp; 2, bayonet; 3, sub-light guide plate; 4, lug; 5, LED light; 6, PCB; 7, block; 8, baffle; 9, clip.
The utility model is further described in accordance with figures and the preferred embodiments as follows.
As shown in
For the specific splicing mode, the convex clips 9 are arranged on the clamp 1, and two adjacent clips 9 form a bayonet 2. Correspondingly, the sub-light guide plates 3 are provided with lugs 4 fitted with the bayonets 2. Therefore, as long as the bayonets 2 have an appropriate spacing, close splicing of two adjacent sub-light guide plates 3 can be ensured after the lugs 4 are arranged in the bayonets 2. The splicing mode is favorable for modularized and standardized design and production of the sub-light guide plates 3 and the clamp 1 and provides convenience for processing, particularly for the clamp 1. The clamp 1 can be made to a standard section and cut to any length in accordance with the sizes of the liquid crystal panel. The splicing mode has advantages of convenience and less waste of materials. Other splicing modes of the sub-light guide plates 3 are all within the protection extent of the utility model.
The backlight module used for the LCD is characterized in that sub-light guide plates 3 of modular design are used, and the light guide plate applicable to any sizes of the LCD can be formed by splicing of the sub-light guide plates 3. The backlight module has advantages of convenient processing and assembly, productivity improvement, material waste reduction and backlight module cost decrease. The concept of the utility model is further described in terms of the fitting mode of the lugs 4 and the bayonets 2.
Embodiment 1: As shown in
Embodiment 2: As shown in
Embodiment 3: As shown in
The utility model is described in detail in accordance with the above contents with the specific preferred embodiments. However, the utility model is not limited to the specific embodiments. For the ordinary technical personnel of the technical field of the utility model, on the premise of keeping the conception of the utility model, the technical personnel can also make simple deductions or replacements, and all of which should be considered to belong to the protection scope of the utility model.
Number | Date | Country | Kind |
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201120246559.8 | Jul 2011 | CN | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CN11/83426 | 12/3/2011 | WO | 00 | 12/26/2011 |