A positioning device for a light guide plate

Abstract

The invention relates to a positioning device for a light guide plate, which comprises a first support, a second support and a spring, wherein a block is arranged on a backplane; the first support and the second support are intersected to present an X shape; one end of the first support and one end of the second support are fixedly connected onto the block, and the other end of the first support is bent to form a first fixing part to be inserted in the backplane; the second support and the first support have the same structure, bosses are formed at a first positioning hole and a second positioning hole, one end of a second spring is fixeldy connetced onto the first support, and the other end is fixedly connected onto the second support. The positioning device effectively guides the expansion direction of the light guide plate away from the direction of an LED light strip, and the risk that the LED is pressed to be damaged due to expansion of the light guide plate can be reduced; and when the light guide plate is contracted, the block is back to the original place under effects of spring rebound and reduced intersected angle between the first support and the second support to enable the block to eject against the light guide plate, the block is back to place and can be reused, the cost of maintaining the block and replacing the block can be reduced, and effects are obvious.

Description

technical field [0001] The invention relates to a positioning device for a light guide plate. Background technique [0002] With the continuous development of technology, consumers have higher requirements for photometric LED LCD TVs. "Ultra-narrow" (ultra-narrow bezel) and "ultra-thin" (ultra-thin thickness) have become new development trends for direct-lit LED LCD TVs. As the core optical component in the photometric LED LCD TV, the light guide plate accounts for an increasing proportion in the whole TV set. Such as figure 1 As shown, in the traditional TV, the light guide plate is positioned by the left and right positioning columns 1 and the upper and lower positioning columns 2, wherein the upper and lower positioning columns 2 can expand symmetrically up and down when the light guide plate is heated, and the left and right positioning columns 1 can be symmetrical when the light guide plate is heated. The ground swells left and right. However, the structure of the up...

AI Technical Summary

Problems solved by technology

However, the structure of the up, down, left, and right positioning columns cannot differentiate the expansion of the light guide plate, and it is easy to cause the light guide plate to crush LED lights and other components during the expansion process, causing unnecessary losses and shortening the service life of the TV. , increase the use and maintenance cost of consumers; in addition, the positioning column is compressed when the light guide plate is heated and expanded, but it cannot rebound in time or the rebound time is long, which is not conducive to the use of consumers

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