Samsung v Apple, [2012] EWHC 1882 (Pat), at 189-191, explains the decision reasonably well without needing to read the entire ruling:
I think this explains it a little better....
In a ruling on July 9, 2012, the High Court of England & Wales sided with Samsung that the designs of the Galaxy Tab series of products are different from an Apple tablet design, and do not infringe Apples Registered Community Design No. 181607-0001. Samsung products subject to this trial were the Galaxy Tab 10.1, the Galaxy Tab 8.9, and the Galaxy Tab 7.7.
Samsung had requested this voluntary trial in September 2011, in order to oppose Apples ongoing efforts to reduce consumer choice and innovation in the tablet market through their excessive legal claims and arguments. Apple has insisted that the three Samsung tablet products infringe several features of Apples design right, such as slightly rounded corners, a flat transparent surface without any ornamentation, and a thin profile.
However, the High Court dismissed Apples arguments by referring to approximately 50 examples of prior art, or designs that were previously created or patented, from before 2004. These include the Knight Ridder (1994), the Ozolin (2004), and HPs TC1000 (2003). The court found numerous Apple design features to lack originality, and numerous identical design features to have been visible in a wide range of earlier tablet designs from before 2004.
Equally important, the court also found distinct differences between the Samsung and Apple tablet designs, which the court claimed were apparent to the naked eye. For instance, the court cited noticeable differences in the front surface design and in the thinness of the side profile. The court found the most vivid differences in the rear surface design, a part of tablets that allows designers a high degree of freedom for creativity, as there are no display panels, buttons, or any technical functions. Samsung was recognised by the court for having leveraged such conditions of the rear surface to clearly differentiate its tablet products through visible detailing.
Samsung welcomes todays ruling by the High Court, which affirms Samsungs commitment to protect its own intellectual property rights while respecting those of other companies. Samsung believes Apples excessive legal claims based on such a generic design right can harm not only the industrys innovation as a whole, but also unduly limit consumer choice.
The courts decision, according to Samsung, appears to be largely based on unusual details on the back of the Galaxy Tab and its overall thinner design. Judge Birss is giving Apple 21 days to appeal the ruling.