Photodetector, electro-optical device, and electronic apparatus
View Patent ↗An photodetector includes: a first light receiving element that receives light including ambient light; a second light receiving element that receives light including the ambient light; and a red color filter disposed on an optical path through which the ambient light is incident on the second light receiving element.
1. A photodetector comprising:
a first light receiving element that receives light including ambient light, the first light receiving element including a first light receiving element anode and a first light receiving element cathode;
a second light receiving element that receives light including the ambient light, the second light receiving element including a second light receiving element anode and a second light receiving element cathode;
and a red color filter disposed on an optical path through which the ambient light is incident on the second light receiving element,
wherein, the first light receiving element and the second light receiving element are connected in series through a wiring line, the wiring line being connected to the first light receiving element anode and the second light receiving element cathode, and
wherein the first light receiving element cathode is connected to a first potential, the second light receiving element anode is connected to a second potential, and the first potential is higher than the second potential.
2. The photodetector according to claim 1 , further comprising:
a first green color filter disposed on an optical path through which the ambient light is incident on the first light receiving element.
3. The photodetector according to claim 2 , further comprising:
a second green color filter disposed on the optical path through which the ambient light is incident on the second light receiving element.
4. The photodetector according to claim 3 , wherein the second green color filter is located before the red color filter when viewed from a side where the ambient light is incident on the second light receiving element.
5. The photodetector according to claim 1 , further comprising:
a detection circuit that detects a visible light component of the ambient light on the basis of a difference between a light receiving result in the first light receiving element and a light receiving result in the second light receiving element.
6. A photodetector comprising:
first and second light receiving elements, each of which receives light including ambient light and has a light receiving sensitivity to at least a visible light component of the ambient light, the first light receiving element including a first light receiving element anode and a first light receiving element cathode, and the second light receiving element including a second light receiving element anode and a second light receiving element cathode;
a detection circuit that detects a visible light component of the ambient light on the basis of a difference between a light receiving result in the first light receiving element and a light receiving result in the second light receiving element; and
a filter that is disposed on an optical path through which the ambient light is incident on the second light receiving element and that cuts off the visible light component and transmits a near-infrared light component,
wherein the first and second light receiving elements are connected in series through a wiring line, the wiring line being connected to the first light receiving element anode and the second light receiving element cathode, and
wherein the first light receiving element cathode is connected to a first potential, the second light receiving element anode is connected to a second potential, and the first potential is higher than the second potential, and
wherein each of the first and second light receiving elements is foamed on a substrate by a low temperature poly silicon process.
7. An electro-optical device comprising the photodetector according to claim 1 .
8. The electro-optical device according to claim 7 , further comprising:
a light source that supplies light to the electro-optical device; and
an adjustment circuit that controls an amount of light of the light source on the basis of a difference between a light receiving result in the first light receiving element and a light receiving result in the second light receiving element.
9. An electronic apparatus comprising the electro-optical device according to claim 7 .