Touch sensing liquid crystal display compatible with linearly polarized sunglasses

摘要

A touch sensing liquid crystal display is made with a stack of layers that has controlled or low birefringence. The final layers of the output of the touch sensing liquid crystal display circularly polarize the output light. The combination of low birefringence and circularly polarized output light provides a touch sensing LCD that can be viewed from many angles with low visible artifacts, even through linear polarizing objects, such as sunglasses.

主权项

1. A touch sensing liquid crystal display, comprising:
a liquid crystal layer; a capacitive touch sensing layer comprising a plurality of layers including at least a transparent conductive layer and a transparent substrate, wherein the plurality of layers comprising the touch sensing layer together are comprised of low birefringence materials; a top polarizer formed between the liquid crystal layer and the capacitive touch sensing layer and which receives light from the liquid crystal layer and outputs linearly polarized light to be passed through the touch sensing layer; and a retardance layer formed on the capacitive touch sensing layer and having substantially ¼ wave retardance, placed after the linear polarized output, to induce a phase delay between orthogonal components of linear polarized light emanating from the top polarizer.