发明名称 |
Semiconductor for sensing infrared radiation and method thereof |
摘要 |
The bolometric sensing circuit includes a pixel array comprising pixels, each pixel comprising a sensor configuration to comprise a light receiving portion to convert incident photons into heat and a sensing portion integrated with the light receiving portion and having a resistance varying according to the converted heat; an output portion to output a common mode voltage that represents a voltage of the sensing portion from which accumulated heat has been removed in response to a heat removing voltage to thermally reset the sensing portion, and output a sensed voltage that represents a voltage of the sensing portion which has accumulated heat for an integration period after being thermally reset; and a processor to subtract the common mode voltage from the sensed voltage to produce a signal voltage that represents a change in resistance of the sensing portion due to the heat accumulated for the integration period. |
申请公布号 |
US8847160(B2) |
申请公布日期 |
2014.09.30 |
申请号 |
US201113251674 |
申请日期 |
2011.10.03 |
申请人 |
Hanvision Co., Ltd.;Lumiense Photonics Inc. |
发明人 |
Hannebauer Robert |
分类号 |
G01J5/24;H01L27/14;H01L31/09;H04N5/33;H01L31/18;H01L27/146 |
主分类号 |
G01J5/24 |
代理机构 |
Cantor Colburn LLP |
代理人 |
Cantor Colburn LLP |
主权项 |
1. A bolometric sensing circuit comprising:
a pixel array comprising of a plurality of pixels, each pixel comprising of a sensor configured of a light receiving portion to convert incident photons into heat and a sensing portion integrated with the light receiving portion and having a resistance varying according to the converted heat, a mechanical structure that moves in response to an applied voltage that pulls the sensing area into intimate contact with a thermal sink such that the temperature of the sensor is equalized with the substrate, thereby thermally resetting the sensor; an output portion configured to output a common mode voltage that represents a voltage derived from the sensing portion from which accumulated heat has been removed in response to a heat removing voltage actuated mechanical thermal reset of the sensing portion, and an output of a sensed voltage that represents a voltage of the sensing portion which has accumulated heat for an integration period after being thermally reset; a memory configured to store the common mode voltage and the sensed voltage; and a processor configured to subtract the common mode voltage from the sensed voltage to produce a signal representation that represents a change in resistance of the sensing portion due to the heat accumulated for the integration period, wherein a read out of the common mode voltage and the sensed voltage occurs during one scan period in which desired number of pixels are read out, the one scan period includes a first period before the common mode voltage is read out and a second period after the common mode voltage is read out, and the output portion is further configured to comprise: a storage configured to store the common mode voltage for the first period and to store the sensed voltage for the second period; and a switching portion configured to output the common mode voltage to the memory after the first period and subsequently output the sensed voltage after the second period. |
地址 |
KR |