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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorSukeyuki Shinotsuka
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An image sensor comprising a number of light sensor circuits each representing a unit pixel and capable of outputting a sensor signal corresponding to a photo current produced in a photoelectric converting element in proportion to light falling thereon, which is provided with a way of detecting a period and a phase of flicker in light from a light source and a way of determining timing of obtaining the maximum brightness of the light source based on the flicker detection signal and reading sensor signals from respective pixels at the timing determined. This image sensor can easily prevent the effect of flicker resulting from flicker of the light source to an image taken and displayed by the image sensor with no need for adjusting the time of accumulating a charge in the capacitor in accord with incident light thereon and compensating an image signal to be displayed.
An image sensor comprising a number of light sensor circuits each representing a unit pixel and outputting a sensor signal corresponding to a sensor current produced in a photoelectric converting element in proportion to a quantity of light falling thereon when taking an image, characterized in that the image sensor is provided with a flicker state detecting means for detecting a frequency and a phase of a flicker in light of a light source by detecting a change in a light detection signal corresponding to a photo current produced when light from the light source enters a PN junction of a transistor for outputting a sensor signal to detect the photo current in the photodiode at the PN junction located on the output side of the transistor and to output a photo-current detection signal in an information-reading circuit for reading and quantizing sensor signals output in a time series from respective light sensor circuits of the image sensor, the detection signal corresponding to the photo current flowing in the photodiode of the transistor of each light sensor circuit being read under the control of an electronic control unit (ECU) during an OFF-state of the transistor to detect the quantity of light and the flicker period of the light source,
An image sensor comprising a number of light sensor circuits each representing a unit pixel and outputting a sensor signal corresponding to a sensor current produced in a photoelectric converting element in proportion to a quantity of light falling thereon when taking an image, characterized in that the image sensor is provided with means for detecting light from a light source by a photo sensor, binarizing a light detection signal from the light source by using a threshold value, converting the binarized light detection signal from a frequency signal into a voltage signal, converting the voltage signal from an analog signal into a digital signal, detecting a period and a phase of flicker in light of the light source and determining a phase at which the period of the flicker most meets with the frequency of the binarized light detection signal frequency,
An image sensor comprising a number of light sensor circuits each representing a unit pixel and outputting a sensor signal corresponding to a sensor current produced in a photoelectric converting element in proportion to a quantity of light falling thereon when taking an image, characterized in that the image sensor is provided with means for detecting light from a light source by a photo sensor, converting a light detection signal from an analog signal into a digital signal, analyzing a frequency of flicker in the light source, setting a band-pass filter to pass only a flicker frequency component of the light detection signal and determining a phase at which the period of the flicker component signal and the period of the flicker of the light source most match each other,
Dependencies are inferred from the claim text.