Patent ID: 8497848

Claim:
A resistive touch device without perception of color difference, comprising: a first transparent conductive substrate having a plurality of first transparent conductive electrodes formed on a bottom of the first transparent conductive substrate, each of the first transparent conductive electrode having a first voltage difference in a first direction, and being configured to comply with certain specifications included an optic condition, a dimensional condition or both, the optic condition defining a differential value of Euclidean distance ΔE of the first transparent conductive electrode to be smaller than or equal to 5 and a yellow/blue differential value Δb* to be smaller than or equal to 1.5 when light emitted through the first transparent conductive substrate, and simultaneously defines a differential value of Euclidean distance ΔE of the first transparent conductive electrode to be smaller than or equal to 10 when light reflected from the first transparent conductive substrate, and the dimensional condition defining the each adjacent first transparent conductive electrode having a distance of gap in a range from 50 to 1000 micro-meters, wherein the differential value of Euclidean distance ΔE of the optic condition is determined according to a differential value of lightness ΔL the yellow/blue differential value Δb*, and a red/green differential value Δa* in a color space, which is provided with following relationship of ΔE=√{square root over ((ΔL) 2 +(Δa*) 2 +(Δb *) 2 )}{square root over ((ΔL) 2 +(Δa*) 2 +(Δb *) 2 )}{square root over ((ΔL) 2 +(Δa*) 2 +(Δb *) 2 )}; a second transparent conductive substrate being aligned to the first transparent conductive substrate with an interval, and comprising a plurality of second transparent conductive electrodes disposed on a top of the second transparent conductive substrate, each of the second transparent conductive electrode having a second voltage difference in a second direction and the second direction being perpendicular to the first direction; and a spacer layer being disposed between the first transparent conductive substrate and the second transparent conductive substrate, and being used for isolating the first transparent conductive electrodes and the second transparent conductive electrodes.