Abstract: A novel organometallic complex that is highly convenient, useful, or reliable, and a light-emitting device are provided. The organometallic complex is represented by General Formula (G2). In General Formula (G2), each of R1 to R6, R8 to R22, and R31 to R34 independently represents hydrogen (including deuterium), an alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, at least one of R31 to R34 represents an alkyl group having 1 to 10 carbon atoms or a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, and n is an integer of 1 to 4.

Abstract: To provide a novel organometallic complex and a novel light-emitting device that are useful or reliable. The organometallic complex includes platinum (Pt), a cyano group, and a phenyl group that has two alkyl groups at the ortho-positions. The light-emitting device includes an organic compound layer held between a pair of electrodes; the organic compound layer includes a light-emitting layer; the light-emitting layer contains an organic compound and the organometallic complex; the organometallic complex includes platinum (Pt), a cyano group, and a phenyl group that has two alkyl groups at the ortho-positions; and the difference between the LUMO level of the organic compound and the HOMO level of the organometallic complex is greater than or equal to 2.5 eV and less than or equal to 3.0 eV.

Abstract: An imaging device captures an object. The imaging device includes: an imaging unit that captures the object and outputs video data; a memory unit that stores therein the video data from the imaging unit; a video signal processing unit that reads the video data from the memory unit at a frame rate lower than a frame rate at which the video data are written into the memory unit and performs signal processing on the video data; an output interface unit that outputs to an external device the video data; and a control unit that outputs to the imaging unit an instruction to capture the specific number of frames and to write video data into the memory unit as an exposure period signal, instructs the video signal processing unit to output the video data from the memory unit, and outputs to the external device an imaging period signal.

Abstract: An imaging device captures an object. The imaging device includes: an imaging unit that captures the object and outputs video data; a memory unit that stores therein the video data from the imaging unit; a video signal processing unit that reads the video data from the memory unit at a frame rate lower than a frame rate at which the video data are written into the memory unit and performs signal processing on the video data; an output interface unit that outputs to an external device the video data; and a control unit that outputs to the imaging unit an instruction to capture the specific number of frames and to write video data into the memory unit as an exposure period signal, instructs the video signal processing unit to output the video data from the memory unit, and outputs to the external device an imaging period signal.