Information processing equipment
View Patent ↗According to the invention, information processing equipment using a flexible printed-circuit board which does not lose bendability with repeated opening and closing of a display unit, and which suppresses radiation noise from signal wiring is provided. In the configuration of the invention, a first cover film is formed to cover a wiring layer on a first surface of a base film, and a second cover film is formed to cover a wiring layer on a second surface of the base film. Portions of the second cover film and the underlying wiring layer on the second surface in the loop formation region are discontinuously removed in the inward-bending area of the loop, and the base film is exposed in the removed parts. The wiring layer underneath the remaining second cover film, which is not removed, and the wiring layer on the first surface of the base film are electrically connected via through holes penetrating the base film.
1. Information processing equipment comprising:
a display unit having a display device and a main body unit accommodating an information processing circuit, joined so as to be openable and closable about a hinge; and
a flexible printed-circuit board which transfers display signals output from the information processing circuit to the display device and which is a loop around the hinge for absorbing expansion and contraction due to opening and closing operation of the display unit,
wherein the flexible printed-circuit board has a base film, wiring layers both on a first surface and a second surface of the base film, and a first cover film covering the wiring layer on the first surface,
portions of the wiring layer on the second surface in a formation region of the loop are discontinuously removed in the inward-bending area of the loop, and
the remaining portions of the wiring layer which are not removed and the wiring layer on the first surface of the base film are electrically connected via through holes penetrating the base film.
2. The information processing equipment according to claim 1 , wherein the longitudinal direction of the portions where the wiring layer and the base film have been removed is perpendicular to the longitudinal direction of the flexible printed-circuit board.
3. The information processing equipment according to claim 2 , wherein the intervals between the remaining portions of wiring layer and base film in the inward-bending area of the loop vary according to the size of the curves of the loop.
4. The information processing equipment according to claim 2 , wherein the second surface is disposed on the outer side of the loop.
5. The information processing equipment according to claim 2 , wherein the second surface is disposed on the inner side of the loop.
6. The information processing equipment according to claim 1 , wherein the longitudinal direction of the portions where the wiring layer and the base film have been removed are diagonal relative to the longitudinal direction of the flexible printed-circuit board.
7. The information processing equipment according to claim 1 , wherein the wirings electrically connected via the through holes are ground lines.
8. The information processing equipment according to claim 1 , wherein the wiring layer on the second surface is covered by a second cover film.