PHOTODETECTOR AND SUBJECT DETECTION SYSTEM USING THE SAME

• Main Authors: FUJIWARA IKUO, SUZUKI KAZUHIRO, NOFUSA YUKI, KWON HONAM
• Format: Patent
• Language: English; Japanese
• Published: 27.08.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

To provide a photodetector and a subject detection system using the same that can suppress the temperature fluctuation of photon detection efficiency.SOLUTION: A photodetector 1 includes a pixel Pici equipped with at least one avalanche photodiode APDi (i=1, ..., and N), a voltage source VCOM that applies a driving voltage to the pixel Pici, a temperature detecting portion 2 having a light-shielding portion provided on the upper surface, a diode PDi to which a reverse voltage less than the breakdown voltage is applied, and a temperature detecting element that detects information on the temperature of the pixel Pici, and a control portion that controls the drive voltage on the basis of information on the temperature of the pixel Pici detected by the temperature detection portion 2.SELECTED DRAWING: Figure 1 【課題】光子検出効率の温度変動を抑制することのできる光検出装置およびこれを用いた被写体検知システムを提供する。【解決手段】光検出装置１は、アバランシェフォトダイオードＡＰＤｉ（ｉ＝１，・・・，ｎ）を少なくとも１つ備えた画素Ｐｉｃｉと、画素Ｐｉｃｉに駆動電圧を印加する電圧源ＶＣＯＭと、上面に遮光部が設けられ、ブレークダウン電圧未満の逆方向電圧が印加されるダイオードＰＤｉを有し画素Ｐｉｃｉの温度に関する情報を検出する温度検出素子を備えた温度検出部２と、温度検出部２によって検出された画素Ｐｉｃｉの温度に関する情報に基づいて駆動電圧を制御する制御部と、を備えている。【選択図】図１