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Class Information
Number: 250/214R
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controlled circuit > Special photocell or electron tube circuits

Sub-classes under this class:

Class Number Class Name Patents
250/214B Ambient light desensitizing means 186
250/214AL Ambient light responsive 316
250/214A Amplifier type 788
250/214AG Automatic gain control 265
250/214C Compensation 266
250/214DC Digital circuitry 92
250/214SW Electronic switch 110
250/214D Light dimmers 23
250/214L Logarithmic/linear signal 54
250/214P Photographic control 78
250/214PR Photosensitive rheostat type 81
250/214RC Rate of change 43
250/214SG Self-generating type 41
250/214SF Slave flash 9
250/214.1 Special photocell 1,230

Patents under this class:

Patent Number Title Of Patent Date Issued
8710424 Single-electron detection method and apparatus for solid-state intensity image sensors with a charge splitting device Apr. 29, 2014
8710423 Image pickup device with a plurality of pixels and an AD conversion circuit Apr. 29, 2014
8710421 Solid-state imaging device and imaging apparatus Apr. 29, 2014
8704149 Optoelectronic device assembly having auxiliary energy receiver Apr. 22, 2014
8704148 Light-sensing apparatus having a conductive light-shielding film on a light-incident surface of a switch transistor and method of driving the same Apr. 22, 2014
8704144 Dual speed readout integrated circuit for high spatial and temporal resolution applications Apr. 22, 2014
8692180 Readout circuit for touch sensor Apr. 8, 2014
8692177 Solid-state imaging device including analog-to-digital converter and analog-to-digital conversion method Apr. 8, 2014
8686345 Standby circuit Apr. 1, 2014
8686344 Processing method and apparatus for energy saving of an active infrared induction instrument powered by a dry battery Apr. 1, 2014
8686343 Avalanche photodiode circuits with protection against damage from sudden increases in incident light level Apr. 1, 2014
8686342 Double-sided image sensor formed on a single semiconductor wafer die Apr. 1, 2014
8686341 Image sensor with double integration time and conditional selection Apr. 1, 2014
8675107 Photoelectric conversion apparatus, control method thereof, imaging apparatus, and imaging system Mar. 18, 2014
8674285 Vehicle rearview mirror system Mar. 18, 2014
8674284 Sensing device having photo sensing element alternately operated in different biased states and related touch-controlled display device Mar. 18, 2014
8669511 Device and method for determination of a charge amount on a capacitive element, and a device and method for setting a circuit node at a predetermined voltage Mar. 11, 2014
8664580 Optical sensor and electronic equipment Mar. 4, 2014
8653434 Avalanche photodiode operating voltage selection algorithm Feb. 18, 2014
8642941 Photonic integrated circuit with integrated optical transceiver Feb. 4, 2014
8637802 Photosensor, semiconductor device including photosensor, and light measurement method using photosensor Jan. 28, 2014
8629486 CMOS image sensor having anti-absorption layer Jan. 14, 2014
8629391 Detection device comprising a rugged test with dual transistor Jan. 14, 2014
8624173 Sensing pixel structure for generating sensed image with uniform resolution and light sensor Jan. 7, 2014
8618462 Photoelectric transducer device having a rectifier is a second transistor with diode-connected and normally on Dec. 31, 2013
8611610 Method and apparatus for calculating a distance between an optical apparatus and an object Dec. 17, 2013
8610047 Image sensor pixel having a static transistor and a dynamic transistor coupled to a sensing capacitor and driving method thereof Dec. 17, 2013
8610045 Analog signal buffer and image reading device using the analog signal buffer Dec. 17, 2013
8610043 Proximity sensor having an array of single photon avalanche diodes and circuitry for switching off illumination source and associated method, computer readable medium and firmware Dec. 17, 2013
8604409 Photosensitive detector with composite dielectric gate MOSFET structure and its signal readout method Dec. 10, 2013
8598507 Sensor circuit integrated with signal processing circuit and charging circuit Dec. 3, 2013
8598506 Solid-state image pickup apparatus and driving method therefor Dec. 3, 2013
8598505 Method and apparatus for cancellation of transient voltage spike Dec. 3, 2013
8593327 A/D conversion circuit to prevent an error of a count value and imaging device using the same Nov. 26, 2013
8592742 Circuit and method for controlling current supplied to an optical sensor Nov. 26, 2013
8586908 Time-delay integration through reduction of delay between subsequent capture operations of a light-detection device Nov. 19, 2013
8586906 Integrated circuit array having column conductors each associated with a respective basic read circuit, and in particular a large-sized image sensor Nov. 19, 2013
8586905 Semiconductor device and driving method thereof Nov. 19, 2013
8581170 Semiconductor device having a photodiode electrically connected to a back gate of a transistor and driving method thereof Nov. 12, 2013
8581168 Dual well read-out integrated circuit (ROIC) Nov. 12, 2013
8581167 Optically patterned virtual electrodes and interconnects on polymer and semiconductive substrates Nov. 12, 2013
8575536 Pixel array and touch sensing display panel having the same Nov. 5, 2013
8575534 Cross-strip charge multiplexing readout for differential detector arrays with capacitive row and column charge splitters Nov. 5, 2013
8575532 Solid-state imaging device and driving method of solid-state imaging device Nov. 5, 2013
8575530 Photosensitive circuit and system for photosensitive display Nov. 5, 2013
8569676 Power grid abutting a photoreceptor element and having a break in a geometric location to shift power flow of the grid Oct. 29, 2013
8569675 Optical analog PPM demodulator Oct. 29, 2013
8569674 Multiplexed photocurrent monitoring circuit comprising current mirror circuits Oct. 29, 2013
8569671 Pixel array capable of performing pipelined global shutter operation including a first and second buffer amplifier Oct. 29, 2013
8563916 Compact low noise signal readout circuit having at least one open-loop amplifier and method for operating thereof Oct. 22, 2013

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