Flexible circuit board

Abstract

The invention provides a flexible circuit board and a liquid crystal display applying the same. The flexible circuit board comprises a main body circuit board, a light bar circuit board and a connecting circuit board. The light bar circuit board comprises a plurality of light-emitting elements. The connecting circuit board is connected with the main body circuit board and the light bar circuit board. The connecting circuit board comprises a plurality of penetrating holes, and vertical projection of each light-emitting element at the connecting position of the connecting circuit board and the light bar circuit board is overlapped with at least a part of vertical projection of at least one penetrating hole at the connecting position of the connecting circuit board and the light bar circuit board. By adopting the flexible circuit board and the liquid crystal display, the penetrating holes are arranged on the connecting circuit board to decrease elastic force produced by the flexible circuit board in bending. Furthermore, due to the fact that positions of the penetrating holes correspond to the positions of the light-emitting elements, the elastic force of a part of connecting circuit board corresponding to the light-emitting elements is not smaller than that produced by other portions even if the flexible circuit board produces the elastic force, and the light-emitting elements do not easily float from the liquid crystal display.

Description

technical field [0001] The invention relates to a liquid crystal display module, in particular to a flexible circuit board applied to the liquid crystal display module. Background technique [0002] Generally, the light emitting element in the liquid crystal display is the light source of the display panel. The light emitting element is usually placed on the back of the frame of the liquid crystal display and adjacent to one side of the light guide plate to provide a light source for the light guide plate. Generally speaking, the light emitting element can be electrically connected to the driving chip through the flexible printed circuit board. In order to reduce the cost and manufacturing process, the light-emitting element can usually be fixed on one end of the flexible printed circuit board and electrically connected to the circuit of the flexible printed circuit board. The flexible printed circuit board with the light-emitting element is folded back from the outside of...

AI Technical Summary

Problems solved by technology

However, the tape is easily affected by the surrounding environment, such as temperature or humidity, and loses its stickiness

In addition, the flexible printed circuit board itself has a certain rebound force due to the relationship of reflexion, so the result of long-term use, the flexible printed circuit board may be peeled off from the frame, which will cause the light-emitting element to warp and cause light leakage

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