Patent application number | Description | Published |
20100128149 | Color filter array, image sensor including the color filter array and system including the image sensor - A color filter array includes a plurality of white filters, a plurality of yellow filters, a plurality of cyan filters and a plurality of green filters. The plurality of white filters transmits incident light. The plurality of yellow filters transmits a green component and a red component of the incident light. The plurality of cyan filters transmits the green component and a blue component of the incident light. The plurality of green filters transmits the green component of the incident light. An image sensor including the color filter array has high sensitivity and high SNR by increasing transmittance of the incident light. | 05-27-2010 |
20110058081 | IMAGE SENSOR, METHOD FOR OPERATING THEREOF, AND IMAGE PICK-UP DEVICE HAVING THE SAME - The image sensor includes a plurality of column lines, a plurality of active road circuits and a selection circuit. The plurality of column lines are each connected to a corresponding one of a plurality of pixels. The plurality of active road circuits are each connected to a corresponding one of the plurality of column lines. The selection circuit is configured to enable a portion of the plurality of active road circuits based on a plurality of column selection signals. | 03-10-2011 |
20110141322 | Image restoration device and image restoration method - An image restoration method includes receiving an externally input image signal, generating a filtered image signal by filtering the input image signal, and generating a restored image signal by calculating a weighted average of the input image signal and the filtered image signal. Such a method may be implemented using an image restoration device including an image filtering unit adapted generated the filtered image signal, and an image mixing unit adapted to generate the restored image signal. More particularly, the restored image signal may be generated using weighting factors calculated based on the input image signal, by calculating a local variance of pixels in the input image signal, and calculating the weighting factor for each of the pixels based on the local variance of each of the pixels. | 06-16-2011 |
20110176036 | IMAGE INTERPOLATION METHOD USING BAYER PATTERN CONVERSION, APPARATUS FOR THE SAME, AND RECORDING MEDIUM RECORDING THE METHOD - A method of interpolating a signal output from an image sensor including a pixel array having an M×N matrix as a basic pixel block where M and N are integers is provided. The method includes selecting a target pixel signal from among pixel signals output from the basic pixel block; and converting a pattern of a pixel signal output from the pixel array into a Bayer pattern by converting a pixel signal output from the basic pixel block into the Bayer pattern through an operation on the target pixel signal and a neighboring pixel signal of the target pixel signal and interpolating an output signal converted into the Bayer pattern. | 07-21-2011 |
20110222764 | IMAGE RESTORATION DEVICE, IMAGE RESTORATION METHOD AND IMAGE RESTORATION SYSTEM - An image restoration device, an image restoration method, and an image restoration system are provided. The image restoration device includes a point spread function estimation unit, and an image restoration filter unit. The point spread function estimation unit receives an image signal and estimates a Point Spread Function (PSF) from the received image signal. The image restoration filter unit receives the image signal and the PSF, generates an image restoration filter coefficient from the PSF, and filters the image signal according to the image restoration filter coefficient to output the filtered image signal. | 09-15-2011 |
20110234610 | Image Processing Apparatus and Image Processing Methods - Provided are an image processing apparatus and an image processing method. The image processing apparatus includes a point spread function (PSF) pattern generation unit for generating a PSF pattern in which a plurality of PSFs are located in a plurality of lines of the PSF pattern; a PSF estimation unit for estimating PSFs of an out-of-focus input image from step responses of the plurality of lines of the PSF pattern with respect to an edge of the out-of-focus input image; and an image restoration unit for restoring the out-of-focus input image to a focused restored image using the estimated PSF. | 09-29-2011 |
20110268318 | PHOTO DETECTING APPARATUS AND SYSTEM HAVING THE SAME - A photo detecting apparatus may include a signal processing unit, a control register unit, and a register data changing unit. The signal processing unit is configured to process electric signals converted from incident light to generate image data. The control register unit supplies a set value to the signal processing unit, the set value controlling operation of the signal processing unit. The control register unit stores a first set value supplied through a first bus, the first set value corresponding to an initial set value based on a decoded external control signal. In addition, the register data changing unit supplies a second set value to the control register unit through a second bus, separate from the first bus, when the first set value is to be changed. | 11-03-2011 |
20110273580 | METHOD OF PROCESSING IMAGE SIGNALS AND RELATED METHOD OF IMAGE CAPTURE - A method of processing image signals comprises determining whether each of multiple units of input pixel data received from an image sensor is bad pixel data generated by a bad pixel of the image sensor or normal pixel data generated by a normal pixel of the image sensor, and performing interpolation to generate image data corresponding to the bad pixel using only normal pixel data and omitting bad pixel data. | 11-10-2011 |
20110293174 | Image Processing Apparatus, Image Processing Method And Recording Medium For Storing Program To Execute The Method - According to example embodiments, an image processing method includes estimating, using a location-based multi-illuminant estimation unit, candidate correlated color temperature values and location values of sub-units of an image, calculating, using the location-based multi-illuminant estimation unit, a correlated color temperature (CCT) matrix based on the candidate CCT values and the location values, and performing, using a color processing unit, color processing by using the CCT matrix. | 12-01-2011 |
20120140099 | COLOR FILTER ARRAY, IMAGE SENSOR HAVING THE SAME, AND IMAGE PROCESSING SYSTEM HAVING THE SAME - A color filter array of an image sensor is disclosed. The color filter array includes a first filter to transmit wavelengths of a first region in a visible light region, a second filter to transmit wavelengths of a second region in the visible light region, a third filter to transmit wavelengths of a third region in the visible light region, and a mixed filter to transmit wavelengths of at least one of the first region, the second region and the third region, and wavelengths of an infrared region at the same time. | 06-07-2012 |
20120162403 | BIOMETRIC AUTHENTICATION SYSTEM - A biometric authentication system and apparatus are provided. The system includes an image capture device, a processor and an authentication unit. The image capture device generates first and second biometric data of a user based on reflected infrared light reflected from an object. The processor processes the first and second biometric data to generate first and second feature data. The first feature data is associated with the first biometric data, and the second feature data is associated with the second biometric data. The authentication unit performs authentication of the user based on at least one of the first feature data and the second feature data. | 06-28-2012 |
20120169848 | Image Processing Systems - An image processing system includes a calculation unit, a reconstruction unit, a confidence map estimation unit and an up-sampling unit. The up-sampling unit is configured to perform a joint bilateral up-sampling on depth information of a first input image based on a confidence map of the first input image and a second input image with respect to an object and increase a first resolution of the first input image to a second resolution to provide an output image with the second resolution. | 07-05-2012 |
20120182394 | 3D IMAGE SIGNAL PROCESSING METHOD FOR REMOVING PIXEL NOISE FROM DEPTH INFORMATION AND 3D IMAGE SIGNAL PROCESSOR THEREFOR - A three-dimensional (3D) image signal processing method increases signal-to-noise ratio by performing pixel binning on depth information obtained by a 3D image sensor, without changing a filter array detecting the depth information. The processing method may be used in a 3D image signal processor, and a 3D image processing system including the 3D image signal processor. | 07-19-2012 |
20120249740 | THREE-DIMENSIONAL IMAGE SENSORS, CAMERAS, AND IMAGING SYSTEMS - A three-dimensional image sensor may include a light source module configured to emit at least one light to an object, a sensing circuit configured to polarize a received light that represents the at least one light reflected from the object and configured to convert the polarized light to electrical signals, and a control unit configured to control the light source module and sensing circuit. A camera may include a receiving lens; a sensor module configured to generate depth data, the depth data including depth information of objects based on a received light from the objects; an engine unit configured to generate a depth map of the objects based on the depth data, configured to segment the objects in the depth map, and configured to generate a control signal for controlling the receiving lens based on the segmented objects; and a motor unit configured to control focusing of the receiving lens. | 10-04-2012 |
20130010162 | IMAGE SENSORS, IMAGE PROCESSING APPARATUS INCLUDING THE SAME, AND INTERPOLATION METHODS OF IMAGE PROCESSING APPARATUS - An image sensor, an image processing apparatus including the same and an interpolation method of the image processing apparatus are provided. The image sensor includes a plurality of pixels that include a low-luminance pixel including a first photoelectric conversion device that accumulates a charge less than a predetermined reference value and a high-luminance pixel including a second photoelectric conversion device that accumulates a charge more than the predetermined reference value. Interpolation is carried out giving more weight to the low-luminance pixel at low luminance and giving more weight to the high-luminance pixel at high luminance, so that a higher SNR is obtained. | 01-10-2013 |
20130076933 | BACKSIDE ILLUMINATION IMAGE SENSOR, OPERATING METHOD THEREOF, IMAGE PROCESSING SYSTEM AND METHOD OF PROCESSING IMAGE USING THE SAME - A backside illumination image sensor is provided. The backside illumination image sensor includes a plurality of different types of pixels, each pixel including a photodiode configured to accumulate photogenerated charges corresponding to light incident on a backside of a semiconductor substrate and a transfer transistor configured to transfer the photogenerated charges to a floating diffusion node; and a plurality of transfer lines disposed at a front side of the semiconductor substrate, the plurality of transfer lines connected to a gate of the transfer transistor of a respective one of the pixels, wherein transfer control signals respectively transmitted through the transfer lines produce different effective integration times in the pixels. | 03-28-2013 |
20130201167 | THREE-DIMENSIONAL IMAGE SENSOR AND MOBILE DEVICE INCLUDING SAME - A 3D image sensor includes a depth pixel that includes; a photo detector generating photo-charge, first and second floating diffusion regions, a first transfer transistor transferring photo-charge to the first floating diffusion region during a first transfer period in response to a first transfer gate signal, a second transfer transistor transferring photo-charge to the second floating diffusion region during a second transfer period in response to a second transfer gate signal, and an overflow transistor that discharges surplus photo-charge in response to a drive gate signal. Control logic unit controlling operation of the depth pixel includes a first logic element providing the first transfer gate signal, a second logic element providing the second transfer gate signal, and another logic element providing the drive gate signal to the overflow transistor when the first transfer period overlaps, at least in part, the second transfer period. | 08-08-2013 |
20130222543 | METHOD AND APPARATUS FOR GENERATING DEPTH INFORMATION FROM IMAGE - An apparatus for generating depth information includes a sensing unit and a final depth providing unit. The sensing unit is configured to sense light received from multiple subjects, and to provide initial depth data having distance information about the subjects and two-dimensional (2D) image data having 2D image information about an image obtained from the subjects. The final depth providing unit is configured to generate estimated depth data having estimated distance information about the subjects by transforming the 2D image data into three-dimensional (3D) data, and to provide final depth data based on the initial depth data and the estimated depth data. | 08-29-2013 |
20130235364 | TIME OF FLIGHT SENSOR, CAMERA USING TIME OF FLIGHT SENSOR, AND RELATED METHOD OF OPERATION - A time of flight (ToF) sensor comprises a light source configured to irradiate light on a subject, a sensing unit comprising a sensing pixel array configured to sense light reflected from the subject and to generate a distance data signal, and a control unit comprising a view angle control circuit. The view angle control circuit is configured to detect movement of the subject based on the distance data signal received from the sensing unit and to control a view angle of the sensing unit to increase a number of sensing pixels in the sensing pixel array that are used to sense a region in which the detected movement occurs. | 09-12-2013 |
20130236104 | Apparatus and Method of Processing an Image - An image processing apparatus processes a center pixel by using a plurality of adjacent pixels included in an M×N region. The image processing apparatus includes a pixel value storage unit for storing first pixel values that correspond to first pixels included in one or more rows including a center row in which the center pixel is disposed, and second pixel values that correspond to second pixels disposed above the first pixels from among the plurality of adjacent pixels; and a pixel processing unit for processing the center pixel, based on the first and second pixel values, wherein the M and N are natural numbers that are equal to or greater than two. | 09-12-2013 |
20130242058 | DEPTH CAMERA, MULTI-DEPTH CAMERA SYSTEM AND METHOD OF SYNCHRONIZING THE SAME - A depth camera includes a sensor unit receiving a reflected light and in response thereto outputting an electrical sensing signal; and a synchronization information calculation unit calculating a performance index with reference to the sensing signal, and with reference to the performance index, generating synchronization information for synchronizing a demodulation clock for sensing the received reflected light. The sensor unit adjusts the frequency and/or phase of the demodulation clock with reference to the synchronization information. | 09-19-2013 |
20130335602 | METHOD OF PROCESSING IMAGE SIGNALS AND RELATED METHOD OF IMAGE CAPTURE - A method of processing image signals comprises determining whether each of multiple units of input pixel data received from an image sensor is bad pixel data generated by a bad pixel of the image sensor or normal pixel data generated by a normal pixel of the image sensor, and performing interpolation to generate image data corresponding to the bad pixel using only normal pixel data and omitting bad pixel data. | 12-19-2013 |
20140002636 | METHOD AND DEVICE OF MEASURING THE DISTANCE TO AN OBJECT | 01-02-2014 |
20140009650 | IMAGE SENSOR CHIP, METHOD OF OPERATING THE SAME, AND SYSTEM INCLUDING THE IMAGE SENSOR CHIP - A method of operating an image sensor chip including a motion sensor pixel sensing a motion of an object and a depth sensor pixel, the method including the operations of activating either the depth sensor pixel or the motion sensor pixel according to a mode selection signal, and processing a pixel signal output by either the activated depth sensor pixel or the activated motion sensor pixel. | 01-09-2014 |
20140014818 | PIXEL ARRAY, IMAGE SENSOR INCLUDING THE SAME, AND METHOD OF COMPENSATING FOR LOCAL DARK CURRENT - A pixel array for an image sensor is provided. The pixel array includes a dark pixel which is configured to detect a local dark current in an active pixel block. The dark pixel is distinguished from an optical black pixel block which is arranged around the active pixel block and is configured to detect a global dark current. The pixel array is configured to compensate for dark shading, which is not compensated through global dark current compensation, using the local dark current output from the dark pixel which is arranged within the active pixel block. | 01-16-2014 |
20140103192 | BINARY CMOS IMAGE SENSORS, METHODS OF OPERATING SAME, AND IMAGE PROCESSING SYSTEMS INCLUDING SAME - A binary complementary metal-oxide-semiconductor (CMOS) image sensor includes a pixel array and a readout circuit. The pixel array includes at least one pixel having a plurality of sub-pixels. The readout circuit is configured to quantize a pixel signal output from the pixel using a reference signal. The pixel signal corresponds to sub-pixel signals output from sub-pixels, from among the plurality of sub-pixels, activated in response to incident light. | 04-17-2014 |
20140103401 | IMAGE SENSOR - An image sensor is provided. The image sensor includes a well of a second conductivity type formed on an impurity layer of a first conductivity type, source and drain regions of the first conductivity type, formed in the well to be spaced apart from each other, a first photo diode of the first conductivity type formed in the well to overlap the source and drain regions, a second photo diode of the first conductivity type formed so as not to overlap the source and drain regions and formed to be adjacent to the first photo diode, and a gate electrode formed on the first and second photo diodes. | 04-17-2014 |
20140103413 | CMOS IMAGE SENSORS WITH PHOTOGATE STRUCTURES AND SENSING TRANSISTORS, OPERATION METHODS THEREOF, AND IMAGE PROCESSING SYSTEMS INCLUDING THE SAME - ACMOS image sensor includes a pixel array having a plurality of pixels. Each of the plurality of pixels includes: a photogate structure configured to be controlled based on a first gate voltage; and a sensing transistor including a charge pocket region formed in a substrate region, the sensing transistor being configured to be controlled based on a second gate voltage. Based on the first gate voltage, the photogate structure is configured to integrate charges generated in response to light incident on the substrate region. The sensing transistor is configured to adjust at least one of a threshold voltage of the sensing transistor and a current flow in the sensing transistor according to charges transferred from the photogate structure to the charge pocket region based on a difference between the first gate voltage and the second gate voltage. | 04-17-2014 |
20140104452 | SUB-PIXELS, IMAGE SENSORS HAVING THE SAME AND IMAGE SENSING SYSTEMS - A sub pixel includes a photodetector and a column line output circuit. The photodetector is configured to output an electrical signal based on a detected amount of photons. The column line output circuit is configured to generate an output signal based on the electrical signal. The output signal is one of a current from a current source and a comparison signal indicative of binary output data. | 04-17-2014 |
20140104469 | IMAGE SENSORS, IMAGE PROCESSING SYSTEMS INCLUDING THE SAME, AND METHODS OF OPERATING IMAGE PROCESSING SYSTEM - An image sensor includes a pixel array and a row driver block. The pixel array includes a plurality of subpixel groups, each including a plurality of subpixels. Each of the plurality of subpixels is configured to generate a subpixel signal corresponding to photocharge accumulated in response to a photon. The row driver block is configured to generate a first control signal to control the subpixels included in each of the plurality of subpixel groups to accumulate the photocharge in parallel from a first time point to a second time point. | 04-17-2014 |
20140104473 | IMAGE SENSOR CHIPS - An image sensor chip includes a first wafer and a second wafer. The first wafer includes an image sensor having a plurality of sub-pixels, each of which is configured to detect at least one photon and output a sub-pixel signal according to a result of the detection. The image processor is configured to process sub-pixel signals for each sub-pixel and generate image data. The first wafer and the second wafer are formed in a wafer stack structure. | 04-17-2014 |
20140118579 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a first pixel, a digitization unit, and a correction unit. The first pixel includes a first photoelectric conversion layer for outputting a first electrical signal in response to received incident light, including light of a first color, light of a second color, and light of a third color; and a second photoelectric conversion layer disposed under the first photoelectric conversion layer and for outputting a second electrical signal in response to light transmitted through the first photoelectric conversion layer. The digitization unit generates first original data by digitizing the first electrical signal and generates second original data by digitizing the second electrical signal. The correction unit generates first corrected data corresponding to the light of the first color and second corrected data corresponding to the light of the second color, by respectively correcting the first original data and the second original data. | 05-01-2014 |
20140125994 | MOTION SENSOR ARRAY DEVICE AND DEPTH SENSING SYSTEM AND METHODS OF USING THE SAME - In one example of the inventive concepts, a motion sensor array device includes a wafer and at least two motion sensors implemented on the wafer, each of the at least two motion sensors including a plurality of motion sensor pixels to sense a motion of an object and generate motion image data. The motion sensor array device further includes at least two lenses respectively arranged on the at least two motion sensors, wherein the motion sensor array is implemented in one of a chip and a package. | 05-08-2014 |
20140132808 | METHOD AND APPARATUS FOR INTERPOLATING COLOR - A method for interpolating a color includes interpolating, in a first pixel of a first color, a first pixel value based on pixel values of pixels adjacent to the first pixel, skipping an interpolation on a second pixel of a second color corresponding to the first pixel of the first color; and generating an image based on the interpolated first pixel value and an uninterpolated pixel value of the second pixel. | 05-15-2014 |
20140193069 | METHOD AND DEVICE FOR PROCESSING AN IMAGE TO REMOVE COLOR FRINGE - In image processing, a color fringe is removed. The processing includes selecting a maximum gradient magnitude among gradient magnitudes for each of color components in an image, calculating a boundary of a dilated near-saturation region in the image, detecting a transition region in the image according to the maximum gradient magnitude and the dilated near-saturation region, and removing a color fringe from the transition region. | 07-10-2014 |
20140204250 | IMAGE SENSOR, OPERATING METHOD THEREOF, AND SYSTEM INCLUDING SAME - A method of operating an image processing system includes storing differences between first analog pixel signals and second analog pixel signals and converting the stored differences to one-bit digital signals, the first analog pixel signals being output from a plurality of pixels and corresponding to a previous frame, and the second analog pixel signals being output from the plurality of pixels and corresponding to a current frame. | 07-24-2014 |
20140204258 | IMAGE SENSOR, METHOD FOR OPERATING THEREOF, AND IMAGE PICK-UP DEVICE HAVING THE SAME - The image sensor includes a plurality of column lines, a plurality of active road circuits and a selection circuit. The plurality of column lines are each connected to a corresponding one of a plurality of pixels. The plurality of active road circuits are each connected to a corresponding one of the plurality of column lines. The selection circuit is configured to enable a portion of the plurality of active road circuits based on a plurality of column selection signals. | 07-24-2014 |
20140252437 | DEPTH PIXEL INCLUDED IN THREE-DIMENSIONAL IMAGE SENSOR AND THREE-DIMENSIONAL IMAGE SENSOR INCLUDING THE SAME - A depth pixel includes a photo detection region, first and second photo gates and first and second floating diffusion regions. The photo detection region collects photo charges based on light reflected by an object. The collected photo charges are drifted in a first direction and a second direction different from the first direction based on an internal electric field in the photo detection region. The first photo gate is activated in response to a first photo control signal. The first floating diffusion region accumulates first photo charges drifted in the first direction if the first photo gate is activated. The second photo gate is activated in response to the first photo control signal. The second floating diffusion region accumulates second photo charges drifted in the second direction if the second photo gate is activated. | 09-11-2014 |
20140267845 | IMAGE PROCESSING DEVICE AND SYSTEM COMPRISING SAME - An image processing device comprises a pixel array comprising multiple unit pixels each configured to generate multiple color signals in response to incident light, and a data processing unit configured to generate output image data by processing the color signals in parallel in a first operating mode, and further configured to generate two image signals for each unit pixel based on the color signals and to generate the output image data by processing the two image signals in parallel in a second operating mode. | 09-18-2014 |
20140368712 | IMAGE ADJUSTMENT APPARATUS AND IMAGE SENSOR FOR SYNCHRONOUS IMAGE AND ASYNCHRONOUS IMAGE - Disclosed is an image adjustment apparatus including a receiver which is configured to receive a first input image of an object which is time-synchronously captured and a second input image in which a motion event of the object is sensed time-asynchronously, and an adjuster which is configured to adjust the first input image and the second input image. | 12-18-2014 |
20140374572 | UNIT PIXEL OF IMAGE SENSOR AND IMAGE SENSOR HAVING THE SAME - A unit pixel of an image sensor includes a photoelectric conversion unit, a mode control unit, a first signal generation unit and a second signal generation unit. The photoelectric conversion unit generates photo-charges in response to incident light and provides the photo-charges to a first node. The mode control unit prevents the photo-charges from being discharged from the first node in a first operation mode, and generates a sensing current by discharging the photo-charges and generates a sensing voltage proportional to the sensing current in a second operation mode. The first signal generation unit generates an analog signal based on an amount of the photo-charges accumulated in the first node in the first operation mode. The second signal generation unit generates an on signal and an off signal based on a change of the sensing voltage in the second operation mode. The unit pixel provides various sensing outputs effectively. | 12-25-2014 |
20140375845 | METHODS FOR LENS CALIBRATION AND IMAGE RESTORATION - In one example embodiment, a lens calibration method includes generating a distorted image by distorting a pattern image that includes at least two reference points separated from a center of the pattern image by different distances. The method further includes generating lens calibration data by comparing the pattern image with the distorted image. | 12-25-2014 |
20140375851 | IMAGE SENSOR, IMAGE PROCESSING SYSTEM INCLUDING THE SAME, AND METHOD OF OPERATING THE SAME - An image sensor includes a photo gate controller configured to generate a plurality of demodulated signals respectively corresponding to a plurality of rows of a pixel array and a photo gate driver configured to adjust a phase of the demodulated signals using a source clock signal to remove power, voltage and temperature (PVT) noise and to apply the phase-adjusted demodulated signals to the pixel array. The image sensor matches the phases of the respective demodulated signals using the source clock signal generated based on a reference clock signal, thereby increasing the quality of depth images. | 12-25-2014 |
20150042855 | IMAGE SENSOR, METHOD OF OPERATING THE SAME, AND SYSTEM INCLUDING THE IMAGE SENSOR - An image sensor includes a pixel array having a plurality of layers and a control unit. Each of the plurality of layers including pixels having a photoelectric conversion element and a transmission transistor therein. The photoelectric conversion element is configured to collect charges during an associated charge collection time period and the transmission transistor is configured to transmit the charges to a respective floating diffusion node at an end of the charge collection time period. The control unit configured to individually instruct the transmission transistors associated with different ones of the layers to transmit the charges to the respective floating diffusion nodes such that the charge collection time periods associated with the photoelectric conversion elements implemented in at least two of the layers differs in length. | 02-12-2015 |
20150049230 | IMAGE SENSOR AND METHOD OF OPERATING THE SAME - A method of operating an image sensor includes generating a plurality of sub pixel signals using a sub pixel group. The sub pixel group includes a plurality of sub pixels and corresponds to a single pixel. The method further includes generating a pixel signal having a plurality of bits based on a result of comparing the sub pixel signals with a reference voltage. Each of the sub pixels is a 1-transistor (1T) pixel that detects at least one photogenerated charge and includes only one transistor. | 02-19-2015 |
20150061501 | AMBIENT LIGHT SENSOR AND ELECTRONIC SYSTEM HAVING THE SAME - An ambient light sensor includes a photoelectric conversion unit, a current control unit, a signal conversion unit and a comparison unit. The photoelectric conversion unit provides a photo current having a magnitude corresponding to illuminance of incident light to a first node. The current control unit generates a control current exponentially proportional to an elapse time based on a clock signal, provides the control current to the first node, and outputs a digital code corresponding to the elapse time in response to a reset signal. The signal conversion unit generates a comparison voltage logarithmically proportional to a sum of the photo current and the control current. The comparison unit generates the reset signal by comparing a magnitude of the comparison voltage and a magnitude of a reference voltage. The ambient light sensor generates the digital code effectively representing illuminance of ambient light that eyes of a human being perceives. | 03-05-2015 |
20150070684 | METHODS FOR CALCULATING DISTANCE USING DEPTH SENSOR AND APPARATUSES PERFORMING THE SAME - A method of calculating, using a depth sensor, a distance excluding an ambiguity distance including outputting a modulated light signal output from a light source to an object, receiving the modulated light signal reflected by the object, calculating a distance between the light source and the object using the reflected modulated light signal input to photo gates in conjunction with demodulation signals supplied to the photo gates, the calculating including calculating, using the modulated light signal, at least one distance farther than a maximum measurable distance, and setting the at least one distance to be equal to the maximum measurable distance may be provided. A range of the distance farther than the maximum measurable distance can be determined according to a duty ratio of the modulated light signal. | 03-12-2015 |