Light receiving device, ranging system, and light receiving method
An object of the present technology is to provide a light receiving device by which an optical displacement having occurred in a light receiving section during manufacturing and assembling, etc. can be corrected. The light receiving device ( 10 ) of the present technology includes a light receiving section ( 2 ) including a pixel array ( 16 ), and a control section ( 3 ) that defines multiple pixels included in the pixel array ( 16 ) as an active pixel (Pa) and a non-active pixel (Pb) and causes a signal outputted from a pixel defined as the active pixel (Pa) to be outputted from the light receiving section ( 2 ).
1. A light receiving device, comprising:
a light receiving section including a pixel array and a selection section, wherein
the pixel array includes multiple pixels, and
the selection section is configured to:
select a signal from a plurality of signals outputted from the multiple pixels; and
output the selected signal; and
a control section configured to:
define the multiple pixels included in the pixel array as an active pixel and a non-active pixel;
switch between the active pixel and the non-active pixel based on a control of the selection section; and
control a signal outputted from the active pixel to be outputted from the light receiving section.
2. The light receiving device according to claim 1 , wherein
the control section is further configured to:
define multiple pixel defining ranges in the pixel array, and
define the active pixel in each of the multiple pixel defining ranges.
3. The light receiving device according to claim 2 , wherein
the control section is further configured to define the multiple pixel defining ranges such that the multiple pixel defining ranges partially overlap each other.
4. The light receiving device according to claim 1 , wherein
the selection section includes
a first multiplexer configured to select either a signal outputted from a first pixel in the pixel array or a signal outputted from a second pixel in the pixel array,
a second multiplexer configured to select either a signal outputted from a third pixel in the pixel array or a signal outputted from a fourth pixel in the pixel array,
a third multiplexer configured to select either a signal outputted from a fifth pixel in the pixel array or a signal outputted from a sixth pixel in the pixel array,
a fourth multiplexer configured to select either the signal selected by the first multiplexer or the signal selected by the second multiplexer, and
a fifth multiplexer configured to select either the signal selected by the second multiplexer or the signal selected by the third multiplexer.
5. The light receiving device according to claim 4 , further comprising:
a first time measuring section configured to connect to an output side of the fourth multiplexer; and
a second time measuring section configured to connect to an output side of the fifth multiplexer.
6. The light receiving device according to claim 5 , wherein
the selection section further includes
a sixth multiplexer configured to select either a signal outputted from the second pixel or a signal outputted from the third pixel,
a seventh multiplexer configured to select either a signal outputted from the fourth pixel or a signal outputted from the fifth pixel, and
an eighth multiplexer configured to select either the signal selected by the sixth multiplexer or the signal selected by the seventh multiplexer.
7. The light receiving device according to claim 6 , further comprising:
a third time measuring section configured to connect to an output side of the eighth multiplexer.
8. A ranging system, comprising:
a light emitting section configured to emit light;
a light receiving section including a pixel array and a selection section, wherein
the light receiving section is configured to receive reflection light which results from reflection of the emitted light by an object,
the pixel array includes multiple pixels, and
the selection section is configured to:
select a signal from a plurality of signals outputted from the multiple pixels; and
output the selected signal;
a control section configured to:
define the multiple pixels included in the pixel array as an active pixel and a non-active pixel;
switch between the active pixel and the non-active pixel based on a control of the selection section; and
control a signal outputted from the active pixel to be outputted from the light receiving section; and
a ranging processing section configured to calculate, based on the signal outputted from the active pixel, a distance to the object based on a time interval between light emission from a light source and reception of the reflection light at the light receiving section.
9. A light receiving method, comprising:
selecting a signal from a plurality of signals outputted from multiple pixels, wherein the multiple pixels are included in a pixel array, and the pixel array is included in a light receiving section;
outputting the selected signal;
defining the multiple pixels as an active pixel and a non-active pixel;
switching between the active pixel and the non-active pixel based on the selected signal; and
controlling signal outputted from the active pixel to be outputted from the light receiving section.