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US 10,705,406 B2Granted
Two-dimensional light modulating device and electronic apparatus including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSunil Kim, Jungwoo Kim, Duhyun Lee, Changgyun Shin, Byounglyong Choi
Life of this patent
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Abstract
A two-dimensional (2D) light modulating device may include a plurality of phase modulating elements and a circuit board. The plurality of phase modulating elements may include a meta surface having a nano-structure. The circuit board may be configured to independently control electrical signals that are respectively transmitted to the plurality of phase modulating elements. The circuit board may include a plurality of pixel circuit units. Each of the plurality of pixel circuit units may include a transistor and a capacitor.
Claims19
A two-dimensional (2D) light modulating device comprising:
- a plurality of phase modulating elements comprising a meta surface having a nano-structure;
- and
- a circuit board configured to independently control electrical signals that are respectively transmitted to the plurality of phase modulating elements, and comprising a plurality of pixel circuit units, wherein each of the plurality of pixel circuit units comprises a transistor and a capacitor,
- wherein each of the plurality of phase modulating elements comprises:
- a metal layer that is electrically connected to a corresponding pixel circuit unit among the plurality of pixel circuit units;
- an active layer disposed on the metal layer, the active layer having a refractive index that changes based on an electrical signal transmitted from the corresponding pixel circuit unit;
- a conductive nano-antenna disposed on the active layer;
- a first insulating layer disposed between the active layer and the conductive nano-antenna;
- and
- a second insulating layer disposed between the metal layer and the active layer.
7 more elements
A two-dimensional (2D) light modulating device comprising:
- a plurality of phase modulating elements comprising a meta surface having a nano-structure;
- and
- a circuit board configured to independently control electrical signals that are respectively transmitted to the plurality of phase modulating elements, and comprising a plurality of pixel circuit units, wherein each of the plurality of pixel circuit units comprises a transistor and a capacitor,
- wherein each of the plurality of phase modulating elements comprises:
- a dielectric nano-antenna;
- a metal layer that is separated from the dielectric nano-antenna and electrically connected to a corresponding pixel circuit unit among the plurality of pixel circuit units;
- an active layer disposed above the metal layer, the active layer having a refractive index that changes based on an electrical signal from the corresponding pixel circuit unit;
- and
- a transparent conductive layer disposed on the active layer.
6 more elements
A lidar device comprising:
- a light source unit;
- a two-dimensional (2D) light modulating device configured to steer light irradiated from the light source unit toward an object, the two-dimensional light modulating device comprising:
- a plurality of phase modulating elements comprising a meta surface having a nano-structure, and
- a circuit board independently controlling electrical signals that are respectively transmitted to the plurality of phase modulating elements, the circuit board comprising a plurality of pixel circuit units, and each of the plurality of pixel circuit units comprising a transistor and a capacitor,
- wherein each of the plurality of phase modulating elements comprises:
- a metal layer that is electrically connected to a corresponding pixel circuit unit among the plurality of pixel circuit units;
- an active layer disposed on the metal layer, the active layer having a refractive index that changes based on an electrical signal transmitted from the corresponding pixel circuit unit;
- a conductive nano-antenna disposed on the active layer;
- a first insulating layer disposed between the active layer and the conductive nano-antenna;
- and
- a second insulating layer disposed between the metal layer and the active layer;
- and
- a sensor configured to receive the light that is steered by the 2D light modulating device, irradiated onto the object, and is reflected from the object.
10 more elements
A light modulating device comprising:
- a circuit board comprising a pixel circuit unit configured to generate a control signal;
- and
- a phase modulating element disposed on the pixel circuit unit and being configured to receive the control signal from the pixel circuit unit and modulate at least one of a phase, a direction, and a shape of incident light,
- wherein the phase modulating element comprises:
- a dielectric nano-antenna;
- a metal layer that is separated from the dielectric nano-antenna and electrically connected to the pixel circuit unit;
- an active layer disposed above the metal layer, the active layer having a refractive index that changes based on an electrical signal from the pixel circuit unit and
- a transparent conductive layer disposed on the active layer
- wherein a structure of the dielectric nano-antenna has at least one dimension that is smaller than a wavelength of the incident light.
6 more elements
Dependencies are inferred from the claim text.