SENSOR DEVICE, DISTANCE MEASURING DEVICE, SENSING METHOD

• Main Authors: YAMAZAKI TAKESHI, IMOTO TSUTOMU, HOSOYA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 09.09.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; BASIC ELECTRIC ELEMENTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEMICONDUCTOR DEVICES; TESTING

To improve the accuracy of distance measurement.SOLUTION: A sensor device is provided, comprising: a photoelectric conversion element; a first transfer gate element transferring an electric charge obtained by performing photoelectric conversion by the photoelectric conversion element and causing a first electric charge accumulation unit to accumulate the transferred electric charge; and a second transfer gate element transferring the electric charge obtained by performing photoelectric conversion by the photoelectric conversion element and causing a second electric charge accumulation unit to accumulate the transferred electric charge. This sensor device is constituted in such a manner that in one modulation period out of an accumulation period in which the irradiation of light that is received by the photoelectric conversion element repeats a light emission period and a non-light emission period as one modulation period, there occurs a non-transfer period in which neither the first transfer gate element nor the second transfer gate element performs transfer of electric charges.SELECTED DRAWING: Figure 11 【課題】測距精度の向上。【解決手段】光電変換素子と、光電変換素子で光電変換を行うことにより得た電荷を転送して第１電荷蓄積部に蓄積させる第１転送ゲート素子と、光電変換素子で光電変換を行うことにより得た電荷を転送して第２電荷蓄積部に蓄積させる第２転送ゲート素子を備えたセンサ装置において、光電変換素子が受光する光の照射が、発光期間と非発光期間を一変調期間として繰り返す蓄積期間における一変調期間内で、第１転送ゲート素子と第２転送ゲート素子が共に電荷の転送を行わない非転送期間が生ずるようにする。【選択図】図１１