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Soft circuit board structure and electronic device for preventing soft circuit board from centralized stress when bending

A flexible circuit board, stress concentration technology, applied in the direction of assembling printed circuits with electrical components, can solve the problems of increasing assembly time, failing to effectively reduce assembly costs, and wasting materials.

Active Publication Date: 2007-12-26
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, when the bending operation of about 180 degrees is performed toward the rear of the panel 20', the two bending parts 32', 52' are tightly fixed by the connection points 31', 51', and the flexible circuit board 50' for the light source is subjected to The limitation that the panel with a larger radius of curvature on the outside is surrounded by the flexible circuit board 30 ′ will make the flexible circuit board 50 ′ for the light source with a smaller radius of curvature on the inside not have enough space to bend it smoothly, thus making the bending part 52' is squeezed and warped
[0012] In addition to the problem that the extruded bending part 52' will produce warpage, the joints 31', 51' will have stress concentration due to welding at the turning point, which will make the difference between the two flexible circuit boards 30', 50' The phenomenon of delamination between them will cause assembly failure, waste of materials, increase assembly time and fail to effectively reduce assembly cost

Method used

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  • Soft circuit board structure and electronic device for preventing soft circuit board from centralized stress when bending
  • Soft circuit board structure and electronic device for preventing soft circuit board from centralized stress when bending
  • Soft circuit board structure and electronic device for preventing soft circuit board from centralized stress when bending

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0046] FIG. 2A shows an exploded view of the electronic device 100 according to the first embodiment of the present invention, and FIG. 2B shows a combined front view of the electronic device 100 according to the first embodiment of the present invention. In order to clearly show the connection relationship between the two flexible circuit boards 30, 50, the upper case 10 is omitted in FIG. Improvements are made to the connection structure between them, and other related components in the liquid crystal display are omitted here.

[0047]As shown in Fig. 2A and Fig. 2B, liquid crystal display 100 comprises an upper case 10, a panel 20, multilayer optical film 21, a light source 40, a first (for light source) flexible circuit board 50, a second (panel Use) flexible circuit board 30 , a light guide plate 41 , a plastic frame 42 , a reflective plate 43 and a lower case 60 .

[0048] The light source 40 is a light emitting diode (LED), the first flexible circuit board 50 is a circ...

no. 2 example

[0059] FIG. 3A shows an exploded view of the electronic device 100 according to the second embodiment of the present invention, and FIG. 3B shows a combined front view of the electronic device 100 according to the second embodiment of the present invention. It should be noted that, in order to highlight the flexible circuit boards 30 and 50 of the present invention, the upper case 10 is omitted in FIG. 3B for convenience of illustration.

[0060] In this embodiment, the same parts as those of the first embodiment will not be repeated, but the difference is that: an opening 34 is formed on the second (for the panel) flexible circuit board 30, and the first (for the light source) The flexible circuit board 50 has no opening. After the first and second flexible circuit boards 50, 30 are connected through the first and second connecting parts 51, 31, as shown in FIG. 3B, the first bending part 52 will be partially exposed to the second flexible circuit board. 30 openings 34 .

...

no. 3 example

[0064] FIG. 4A shows an exploded view of the electronic device 100 according to the third embodiment of the present invention, and FIG. 4B shows a combined front view of the electronic device 100 according to the third embodiment of the present invention. It should be noted that, in order to highlight the flexible circuit boards 30 and 50 of the present invention, the upper case 10 is omitted in FIG. 4B for convenience of illustration.

[0065] In this embodiment, the same parts as those of the first embodiment will not be repeated, and the difference is that: a notch 35 is formed on a peripheral edge of the second (panel) flexible circuit board 30; on the other hand, there is no Holes need to be provided on the first (for light source) flexible circuit board 50 . When performing the bonding operation between the first and second flexible circuit boards 50 , 30 , the first connection portion 51 of the first flexible circuit board 50 is connected to the second connection portio...

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PUM

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Abstract

The device consists of a first flexible printed circuit board, a second printed circuit board. The first printed circuit board has a first kink part. The second flexible printed circuit board has a second kink part. The second kink part drills through the first kind part.

Description

technical field [0001] The invention relates to an electronic device for preventing stress concentration when a flexible circuit board is bent, in particular to a structure of a flexible circuit board for a liquid crystal display, which can make two connected flexible circuit boards not bend Stripping will occur. Background technique [0002] A flexible printed circuit board (FPCB) has been widely used in electrical connections between different circuits in electronic devices. Since the flexible printed circuit board has the characteristics of being bendable and lightweight, it not only can effectively save the internal space of the electronic device, but also can be assembled conveniently. [0003] Take the liquid crystal display 100 ′ shown in FIGS. 1A and 1B as an example, wherein FIG. 1A shows an exploded view of a known liquid crystal display 100 ′, and FIG. 1B shows a combined front view of a known liquid crystal display 100 ′. [0004] The liquid crystal display 100...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K3/36
Inventor 张哲志吴嘉容
Owner AU OPTRONICS CORP