X-ray image detector

US7601961B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Anthony Franklin · East Grinstead, GB
• Martin J. Powell · Horley, GB
• Michael Overdick · Eschweiler, DE
• Augusto Nascetti · Roma, IT
• Walter Ruetten · Linnich, DE
• Tiemen Poorter · Eindhoven, NL
• Lex Alving · Mierlo, NL

Key dates

• Filing date: Jun 9, 2005
• Grant date: Oct 13, 2009
• Expiry date: Jan 6, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F39/195

Abstract

An Y-ray detector apparatus comprises an array of detector pixels arranged into a plurality of sub-arrays. The pixels in each sub-array share a common dose sensing output provided to a dose sensing output conductor which extends to a periphery of the pixel array. The dose sensing output conductor for one sub-array of pixels passes through the area occupied by another sub-array of pixels, which can lead to unwanted cross talk. The invention provides a plurality of additional screening electrodes, with a screening electrode substantially adjacent the dose sensing output conductor for each sub-array of pixels. These screening electrodes reduce cross talk between the dose sensing output and other pixel electrodes. In another arrangement, each pixel further comprises a pixel electrode for each pixel formed at an upper region of the array, and the dose sensing output conductors are formed at a lower region of the array. An intermediate conductor layer is then provided which overlaps the dose sensing output conductors for other sub-arrays of pixels and which pass through the area occupied by the sub-array of pixels.