Arrangement for reducing interference in an electronic shelf label

摘要

An arrangement for reducing interference in a wireless electronic shelf label (ESL) (100) having a layered structure the ESL comprising: a display layer (101) comprising display material, a circuit board (203) with a backplane material structure and an antenna (202), and a circuit board arrangement with control electronics for controlling the operation of the label, such as the display and the radio communication, and a resilient layer having a space for a rigid component, such as a battery, wherein said resilient layer is arranged to provide a substantially even total thickness of said label (100), wherein the radio communication control further comprises means for radio frequency communication via modulated backscatter, wherein the arrangement is ring resonator arrangement isolating the ESL from the electrically conducting shelf arranged on the antenna circuit board, the ring resonator arrangement comprising a plurality of ring resonators (204) that are electrically isolated from the antenna and arranged at least on the side nearest the shelf when the ESL is attached to the shelf.

主权项

1. A wireless electronic shelf label (ESL) having a layered structure comprising:
a display layer comprising display material, an antenna circuit board with a backplane material structure, a far field antenna disposed on the antenna circuit board, a circuit board arrangement with control electronics for controlling the operation of the label, including the display and radio communication control, and a resilient layer having a space for a rigid component, such as a battery, wherein said resilient layer is arranged to provide a substantially even total thickness of said label, wherein the radio communication control further comprises means for radio frequency communication via modulated backscatter, wherein the ESL further includes an arrangement for reducing interference which comprises a split ring resonator arrangement, arranged on the antenna circuit board to isolate the ESL from an electrically conducting shelf to which the ESL is attached, and wherein the split ring resonator arrangement comprises a plurality of ring resonators, as separate structures that are electrically isolated from the antenna but are printed on the same layer of the antenna circuit board and arranged at least on a side nearest the shelf to which the ESL is attached.