Nichia Corporation v Arrow Electronics Australia Pty Ltd (No 4)

Nichia Corporation, the patent holder, brought this action against Arrow Electronics Australia Pty Ltd, seeking a declaration that Arrow had infringed Nichia's patent for a light emitting device. The patent, registered under number 2005304586, concerns a particular type of light emitting diode (LED) device, specifically one that emits white light. The dispute centred around the interpretation of claim 3 of the patent, which describes the phosphor used in the LED device as a single fluorescent material represented by a specific general formula. Nichia argued that Arrow's products infringed this claim, while Arrow contended that the phosphor in their products did not meet the specific criteria set out in claim 3.

The court had to determine the correct interpretation of claim 3, specifically whether the phosphor in the claimed device could be the defined fluorescent material together with one or more other fluorescent materials. The key issue was whether claim 3 was limited to a device where the phosphor was solely the defined fluorescent material or if it could include additional materials. The court needed to examine the specification to ascertain whether the claims were limited to the specific formula or if they could include other materials.

The court held that claim 3 of the patent was limited to a light emitting device where the phosphor was the specific fluorescent material represented by the general formula provided. The specification clearly indicated that the invention was directed to specific garnet fluorescent materials and did not suggest that the phosphor could be anything other than the defined material. The consistory statements in the specification reinforced this interpretation, stating that using the specific fluorescent material would yield good characteristics, similar to those obtained with YAG:Ce, which itself falls within the general formula. Consequently, the court found that Arrow's products did not infringe the patent as they did not meet the specific criteria outlined in claim 3.

The court ordered that the declaration sought by Nichia be dismissed, with no orders as to costs.