An imaging device includes a controller and a generator. The controller controls an imaging unit on the basis of a command and data received from a host in accordance with an I2C/I3C communication protocol. The generator generates a second control signal indicating whether or not to apply intra-frame dynamic frequency scaling (DFS) or intra-frame dynamic voltage frequency scaling (DVFS) on the basis of a first control signal received from the host via a first route different from the I2C/I3C communication protocol, and outputs the second control signal to the host via a second route different from the I2C/I3C communication protocol.

A semiconductor device including a biometric recognition function and a touch sensor or near touch sensor function is provided. The semiconductor device includes a light-emitting device and an imaging device. The imaging device includes a gate driver circuit and m rows of pixels (m is an integer more than or equal to 2). The gate driver circuit includes a plurality of first register circuits and second register circuits whose number is less than that of the first register circuits. The first register circuits are connected with each other in series and the second register circuits are connected with each other in series. The gate driver circuit has a function of operating in the first mode and the second mode. In the first mode, the first register circuits are in the on state and the second register circuits are in the off state, and in the second mode, the second register circuits are in the on state and the first register circuits are in the off state.

An apparatus includes a pixel unit including a plurality of pixels arranged in a plurality of rows and each including a quench element of which a control node a signal defining a start and an end of an exposure period is input to and a photodiode connected to the quench element, a scan unit that scans the pixel unit by performing processing of reading signals of the pixels, processing of starting the exposure period, and processing of ending the exposure period on the plurality of rows sequentially in units of one row or two or more rows, and a control unit that outputs a synchronization signal to the scan unit to control a timing of the reading processing, wherein at least one of a timing of the start processing and a timing of the end processing is controlled by another control signal different from the synchronization signal.

A transfer control device includes a difference identifying section which identifies, for a first and second images sequentially captured by synchronous scanning, a difference region of the second image, on the basis of an event signal indicating a change in intensity of light generated in one or a plurality of pixels of each of the first and second images during a time period from capturing of the first image to capturing of the second image; and a transfer control section which executes data transfer different between the difference region and regions other than the difference region, for the second image.

Disclosed is an image sensing device including a plurality of selectors suitable for generating a plurality of selected pixel signals corresponding to one of a plurality of pixel signals; a plurality of signal converters suitable for: setting a plurality of initial voltages which are different from one another, on the basis of a plurality of initialization signals during an initialization period, and generating a plurality of converted pixel signals to which the plurality of initial voltages are respectively reflected, on the basis of the plurality of selected pixel signals and a ramp signal during a readout period; and a calculation circuit suitable for averaging the plurality of converted pixel signals.

A device includes a pixel unit, a selection unit, and a first generation unit. The pixel unit has a plurality of pixels arranged in a plurality of rows. Each pixel includes a quenching circuit configured to receive a signal for determining start and end of an exposure period and a photodiode coupled to the quenching circuit. The selection unit is configured to simultaneously receive a plurality of clock signals of different periods and select a clock signal to be outputted from the plurality of clock signals. The first generation unit is configured to generate the signal by using the outputted clock.

In an imaging system, a video output circuit is configured to convert an analog video signal into digital data and output serial data including the digital data to a signal line on the basis of a serial clock having a higher frequency than a frequency of the camera clock. A camera-clock generation circuit is configured to generate the camera clock synchronized with the system clock output to the signal line. A serial-clock generation circuit is configured to generate the serial clock synchronized with the system clock output to the signal line. A system-clock output circuit is configured to output the system clock to the signal line in a blanking period.

Reference clock CMOS input buffer with self-calibration and improved ESD performance. In one embodiment, a reference clock input buffer of an image sensor includes a Schmitt trigger configured to generate a clock signal having a falling edge and a rising edge. The falling edge and the rising edge are separated by a hysteresis voltage. The Schmitt trigger includes a plurality of output switches and a plurality of voltage control switches that are individually coupled to individual output switches [M2-i] of the plurality of output switches. Voltage of the falling edge signal or the rising edge signal of the Schmitt trigger is adjustable by selectively switching at least one voltage control switch of the plurality of voltage control switches.

This disclosure describes devices, systems, and methods that relate to obtaining image frames with variable resolutions in synchronization with a clock source. An example device may include an image sensor, a clock input, and a controller. The controller includes at least one processor and a memory. The at least one processor is operable to execute program instructions stored in the memory so as to carry out operations. The operations include receiving, by the clock input, a clock signal. The clock signal is a periodic signal defining at least one scan interval. The operations also include during the scan interval, causing the image sensor to capture a full resolution image frame. The operations yet further include during the scan interval, causing the image sensor to capture at least one reduced resolution image frame.

The present invention includes a device for controlling rolling shutter timing, the device including: a first Gate-On-Array (GOA) driving unit configured to generate a reset signal for resetting an image sensor in a unit of a gate line; a second GOA driving unit configured to generate a scan signal for scanning the image sensor in the unit of the gate line; and a timing controller configured to control generation timing of the reset signal and the scan signal. According to the device and the method of controlling rolling shutter timing based on GOA, it is possible to satisfy a bezel-less edge level of a display panel of a smart phone, expand a fingerprint recognition area to a large area by rapidly reading a fingerprint location area, freely control an exposure time, and reduce occurrence of a delay time.