Wide-Dynamic-Range Digital-Pixel CMOS Image Sensor Applying New Readout Operation
Wide-Dynamic-Range Digital-Pixel CMOS Image Sensor Applying New Readout Operation
复制标题
应用新读出操作的宽动态范围数字像素 CMOS 图像传感器
DOI：
10.1093/ietele/e89-c.2.206
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
K. Tanioka
中科院分区：
文献类型：
--
作者：
M. Goto;T. Watabe;H. Ohtake;M. Abe;N. Egami;K. Tanioka
提出了一种采用像素级A/D转换器的宽动态范围CMOS图像传感器。传感器中的脉冲计数器被布置在像素区域之外，以减小像素尺寸，这是制造高清晰度相机的关键要求。一种新的方案称为可变阈值操作也被提出作为一个合适的读出操作方法的传感器。对传感器原型的实验测量表明，通过应用新的读出操作，原型可以获得与照度成正比的线性输出响应。
A new wide-dynamic-range CMOS image sensor with pixel-level analog-to-digital (A/D) converters is proposed. The pulse-counters in the sensor are arranged outside the pixel area in order to reduce pixel size, which is a key requirement for making high-definition cameras. A new scheme called variable threshold operation is also presented as a suitable readout operation method for the sensor. Experimental measurements on a prototype sensor show that the prototype can obtain linear output response proportional to illumination by applying the new readout operation.