專利國別

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發表日期

2012-06-22 09:57:52

本校案號

P93009A

專利名稱

可提高CMOS影像感測器動態範圍之電路裝置及方法「APPARATUS OF HIGH DYNAMIC-RANGE CMOS IMAGE SENSOR AND METHOD THEREOF」

發明人

陳自強、劉維鈞、葉秀芬

所屬院

工學院

提案單位

電機工程學系暨研究所

類型

發明

專利權人

國立中正大學

申請號

11/211,670

申請日期

2005-08-26

公開號

0

公開日期

2007-03-01

證書號

US 7,605,398 B2

核准日期

2009-10-20

國際分類號

H04N-005/335(2006.01)

專利權期間

2005.08.26~2025.08.26(延長613天至2027.05.01)

專利摘要

The present invention discloses an apparatus of high dynamic-range CMOS image sensor and method thereof. The present invention utilize a pixel circuit outputting an output signal, wherein the pixel circuit has a photodiode and a plurality of transistors; and utilize a current source as a charge supplement unit to supply current into one end of the photodiode, and providing charges to the parasitic capacitor of the photodiode to delay saturation in the pixel circuit. In addition, a feedback circuit can be further designed connecting the pixel circuit. The feedback circuit receives the output signal from the pixel circuit and then outputs a control signal according to the output signal of the pixel circuit to control status of the charge supplement unit, and thereby increasing the dynamic range of the CMOS image sensor.

圖示