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US 2019/0162852 A1Published application
Distance Measuring Apparatus and Method of Operating the Same
AssigneeKorea Research Institute of Standards and Science
InventorsJae-Wan KIM, Jae-Yong LEE, Jong-Ahn KIM, Jae-Heun WOO, Young Pyo HONG
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Abstract
A distance measuring apparatus includes an image sensor and an image sensor driver. The image sensor includes a photodiode, a first capacitor and a second capacitor, and a first transfer gate and a second transfer gate configured to transmit an output of the photodiode to the respective first and second capacitors. The image sensor driver is configured to complementarily drive the first transfer gate and the second transfer gate.
Claims21
A distance measuring apparatus comprising:
- an image sensor including a photodiode, a first capacitor and a second capacitor, and a first transfer gate and a second transfer gate configured to deliver an output of the photodiode to the respective first and second capacitors;
- and
- an image sensor driver configured to complementarily drive the first transfer gate and the second transfer gate.
A method of operating a distance measuring apparatus, comprising:
- charging the first and second capacitors connected to a photodiode through first and second transfer gates, respectively;
- irradiating a light to a target object;
- decreasing a voltage of the first capacitor in proportion to the intensity of a light incident on the photodiode and in proportion to a time elapsed after the light is irradiated;
- decreasing a voltage of the second capacitor in proportion to the intensity of the light incident on the photodiode and in inverse proportion to the time elapsed after the light is irradiated;
- and
- measuring a distance between the target object and the distance measuring apparatus using the voltage of the first capacitor and the voltage of the second capacitor.
3 more elements
Dependencies are inferred from the claim text.