Houzz is the new way to design your home.
Degnan Design Builders, Inc
A pergola without lattice on top, provides a little less shade but is easier to maintain.
This pergola uses heavy timbers instead of typical "2x" dimensional lumber.
This pergola uses a dense array of 2x4's on top to create more shade instead of using lattice. Also the beams are larger timbers, but it could be done with dimensional lumber as well.
Notice how this pergola is framed with a large 2x10 fascia board, and then has a layer of 2x8 rafters with 2x4 shade boards on top of it.
A pergola using poles for the shade elements!