Nikkei rises to one-week high on soft yen, brighter view on earnings

* Weaker yen boosts exporters * Strong financial earnings in the U.S. improves sentiment * Chipmakers lose out after Intel disappoints * Yahoo Japan gains after strengthening Facebook ties By Sophie Knight TOKYO, Oct 17 (Reuters) - Japan's Nikkei share average gained 1.2 percent on Wednesday after the yen eased to a one-month low against the euro and dollar, and investors took a sunnier view of earnings. Exporters such as Toyota Motor Corp were given a leg up by a stro