Touch sensitive apparatus with improved spatial resolution

Abstract

A touch-sensitive apparatus comprising a panel defining a touch surface; a first set of opposite and essentially parallel rows of components, and a second set of opposite and essentially parallel rows of components. The second set of opposite and parallel rows being essentially orthogonal to the first set of opposite and parallel rows. The components include emitters and detectors, each emitter being operable for propagating an energy beam across the touch surface inside the panel, and each detector being operable for detecting transmitted energy from at least one emitter. Two of the rows of the first and second set are interleaved rows each having an interleaved distribution of emitters and detectors, and the further two rows of the first and second set are base rows each having a distribution of components comprising at least 70% emitters or detectors.

1 . A touch-sensitive apparatus, comprising:
 a panel ( 1 ) defining a touch surface ( 4 ); and   a first set of opposite and essentially parallel rows ( 20 A,  20 B) of components ( 2 ,  3 );   a second set of opposite and essentially parallel rows ( 22 A,  22 B) of components ( 2 ,  3 ), said second set of opposite and parallel rows ( 22 A,  22 B) being essentially orthogonal to the first set of opposite and parallel rows ( 20 A,  20 B), wherein   the components include emitters ( 2 ) and detectors ( 3 ), each emitter ( 2 ) being operable for propagating an energy beam across the touch surface ( 4 ) inside the panel ( 1 ), and each detector ( 3 ) being operable for detecting transmitted energy from at least one emitter ( 2 ); characterized in that two of the rows ( 20 A,  20 B,  22 A,  22 B) of the first and second set are interleaved rows each having an interleaved distribution of emitters ( 2 ) and detectors ( 3 ), and wherein the further two rows ( 20 A,  20 B,  22 A,  22 B) of the first and second set are base rows each having a distribution of components ( 2 ,  3 ) comprising at least 70% emitters ( 2 ) or detectors ( 3 ).   
     
     
         2 .- 18 . (canceled)