Abstract: An image sensing device capable of detecting a distance to a target object according to a time-of-flight (TOF) method is disclosed. The image sensing device includes a pixel configured to generate a pulse signal based on a photon reflected from a target object; a plurality of time-to-digital converters (TDCs) configured to generate digital codes corresponding to a time delay between the pulse signal and a reference pulse; and a histogramming circuit configured to generate index information of a memory region and an update value of the memory region based on the digital codes, wherein the plurality of TDCs have different activation timing points.

Abstract: An image processing device is provided to include a determination unit configured to i) determine, for a pixel group including pixels in an pixel array of an imaging device that receives reflected light from an object carrying a dot pattern, whether to perform an averaging processing on at least some of the pixels included in the pixel group corresponding to the dot pattern, based on a maximum amplitude value, and ii) determine target pixels from among the pixels, based on a result of summing at least some of the amplitude values of pixel signals of the pixels in the pixel group; and a calculation unit in communication with the determination unit and configured to perform an averaging processing on pixel signals of the target pixels to calculate a distance value of a distance between the imaging device and the object corresponding to the dot pattern.

Abstract: An image sensing device includes a phase difference calculator configured to calculate a phase difference between a modulated light signal and reflected light based on a plurality of captured data generated by a plurality of modulation control signals, each of which has a predetermined modulation phase difference with respect to the modulated light signal; a phase difference corrector configured to calculate a contrast, which is a ratio of an amplitude component of the reflected light to an intensity component of the reflected light, using the plurality of captured data, and determine an aliasing value corresponding to the contrast; and a distance calculator configured to calculate a distance to a target object using a corrected phase difference obtained by correcting the phase difference according to the aliasing value.

Abstract: Provided herein is a distance measurement device. The distance measurement device includes a controller configured to generate a modulated light control signal based on a first modulation frequency selected from among a plurality of modulation frequencies, a length per code determined based on the plurality of modulation frequencies, and number of codes in a pseudo noise code determining whether a pulse, included in each code and corresponding to the first modulation frequency, is inverted, a light source configured to output modulated light in response to the modulated light control signal, and a unit pixel including a first tap to which a first modulation voltage determined based on the modulated light control signal is applied and a second tap to which a second modulation voltage that is inverted from the first modulation voltage is applied.

Abstract: An active image data generating apparatus includes a light emitting unit adapted to emit irradiation light, an image device having multiple pixels, and a diffractive optical element unit adapted to receive the irradiation light from the light emitting unit to generate multiple irradiation patterns toward an image area. The image area is divided into multiple image regions each corresponding to one of the multiple pixels. Each of the image regions is divided into multiple sub image regions. The sub image regions located at same positions within the image regions are defined as one of sub image region groups. A control unit time-divisionally irradiates the sub image region groups with the irradiation patterns to fetch multiple sub frame data from all the pixels of the image device, and to compose the multiple sub frame data into frame data of the image area.