I'm assuming you're interested in United States law here.
The question of patents is easy: patents are about giving someone a limited monopoly to produce something in exchange for them disclosing how they did it. You're not making a cell phone here, so patent issues don't apply.
Trademark is nearly as easy: any use of the "iPhone" name is likely to be nominative use, where you're using the name to refer to the actual product by Apple. There's no problem with doing this.
This leaves only copyright. You're indisputably copying something that Apple created, so the question becomes one of "is the physical design of the iPhone screen copyrightable?". The answer there is a clear "no", on two grounds. First, an iPhone screen doesn't fall under any of the categories of things that can be copyrighted, and second, useful articles can't be copyrighted even if they do fall into one of those categories.
So, your proposed close-up photos don't infringe on any of Apple's intellectual-property rights. Go ahead and make them.