Abstract: A computer system includes an operating system having a kernel and configured to launch a plurality of computing processes. The system also includes a plurality of graphics processing units (GPUs), a front-end driver module, and a plurality of back-end driver modules. The GPUs are configured to execute instructions on behalf of the computing processes subject to a GPU service request. The front-end driver module is loaded into the kernel and configured to receive the GPU service request from one of the computing processes. Each back-end driver module is associated with one or more of the GPUs and configured to receive the GPU service request from the front-end driver module and pass the GPU service request to an associated GPU.

Abstract: One embodiment of the present invention includes a technique for processing graphics primitives in a tile-based architecture. The technique includes storing, in a buffer, a first plurality of graphics primitives and a first plurality of state bundles received from a world-space pipeline, and transmitting the first plurality of graphics primitives to a screen-space pipeline for processing while a tiling function is enabled. The technique further includes storing, in the buffer, a second plurality of graphics primitives and a second plurality of state bundles received from the world-space pipeline. The technique further includes determining, based on a first condition, that the tiling function should be disabled and that the second plurality of graphics primitives should be flushed from the buffer, and transmitting the second plurality of graphics primitives to the screen-space pipeline for processing while the tiling function is disabled.

Abstract: Data may be streamed out of a graphics pipeline during run time without preprogramming the stream out. A command stream may be captured, draw commands monitored, and shader output definitions may be parsed to determine how to stream out shader data, for example for debugging.

Abstract: One embodiment of the present invention includes a memory management unit (MMU) that is configured to manage sparse mappings. The MMU processes requests to translate virtual addresses to physical addresses based on page table entries (PTEs) that indicate a sparse status. If the MMU determines that the PTE does not include a mapping from a virtual address to a physical address, then the MMU responds to the request based on the sparse status. If the sparse status is active, then the MMU determines the physical address based on whether the type of the request is a write operation and, subsequently, generates an acknowledgement of the request. By contrast, if the sparse status is not active, then the MMU generates a page fault. Advantageously, the disclosed embodiments enable the computer system to manage sparse mappings without incurring the performance degradation associated with both page faults and conventional software-based sparse mapping management.

Abstract: A display apparatus which can communicate with an information terminal via a network is disclosed. The display apparatus includes a receiving unit which receives content data which are caused to be displayed on the display apparatus and reproduction control information on reproduction of the content data from the information terminal, a storage unit which saves thereon the content data and/or the reproduction control information based on whether there was an occurrence of a stopping cause in a process of saving the content data and/or the reproduction control information that are received from the receiving unit, and a display unit which causes the content data to be displayed on the display apparatus based on the reproduction control information saved in the storage unit.

Abstract: This disclosure describes communication techniques that may be used within a multiple-processor computing platform. The techniques may, in some examples, provide software interfaces that may be used to support message passing within a multiple-processor computing platform that initiates tasks using command queues. The techniques may, in additional examples, provide software interfaces that may be used for shared memory inter-processor communication within a multiple-processor computing platform. In further examples, the techniques may provide a graphics processing unit (GPU) that includes hardware for supporting message passing and/or shared memory communication between the GPU and a host CPU.

Abstract: Disclosed are apparatus and methods for rendering using a graphics processing component (GPC). A computing device can receive instructions for a GPC, including an instruction IA associated with a first portion of a canvas. An insertion position in an instruction buffer for instruction IA can be determined by: determining an instruction IB in the instruction buffer that is associated with a second portion of the canvas. If the first and second portions overlap, the insertion position can be based on an overlapping-instruction position of IB in the instruction buffer. Otherwise, if instructions IA and IB are similar, then the insertion position can be based on a second position of IB in the instruction buffer. Otherwise, the insertion position can be determined based on an ending position of the instruction buffer. Instruction IA can be inserted in the instruction buffer at the insertion position.

Abstract: A texture processing pipeline is configured to store decoded texture data within a cache unit in order to expedite the processing of texture requests. When a texture request is processed, the texture processing pipeline queries the cache unit to determine whether the requested data is resident in the cache. If the data is not resident in the cache unit, a cache miss occurs. The texture processing pipeline then reads encoded texture data from global memory, decodes that data, and writes different portions of the decoded memory into the cache unit at specific locations according to a caching map. If the data is, in fact, resident in the cache unit, a cache hit occurs, and the texture processing pipeline then reads decoded portions of the requested texture data from the cache unit and combines those portions according to the caching map.

Abstract: A display driver that receives display line data of plural display lines to perform drive control on a display panel includes a line memory for storing display line data which is supplied from the outside. The display driver includes a logic circuit that controls write and read-out of the display line data in and from the line memory, and sorts pixel data of the display line data using read out data from the line memory, to generate display drive data. Drive circuits drive the display panel in units of display lines based on the drive data which is output from the logic circuit. The drive circuits are separately arranged on both sides of the logic circuit and the line memory which are interposed therebetween. The storage capacity of the line memory corresponds to the number of lines smaller than the number of display lines of a display frame.

Abstract: Embodiments of the disclosure describe a tileable display panel including a screen layer to display a unified image, an illumination layer including a two-dimensional array of lamps, and a display layer disposed between the screen layer and illumination layer. The display layer includes a plurality of pixelets each positioned to be illuminated by a corresponding lamp from the illumination layer to project a magnified image sub-portion corresponding to a received subset. The magnified image sub-portions collectively blend together to form the unified image displayed on the screen layer. Embodiments of the disclosure further include illumination layer control logic to determine a brightness value of each of the received subsets of pixel data, and adjust an illumination setting to reduce or increase an illumination output of a lamp in the illumination layer based, at least on part, on the brightness values of the corresponding subset of pixel data.

Abstract: A rendering method includes performing a binary representation of input data by using input data of target subpixels of an RGB stripe structure, such that the binary representation defines binary data, calculating the binary data via a line detection mask to detect a target line made of the target subpixels, rendering adaptation data of a plurality of adaptation subpixels included in an adaptation line corresponding to the target line, and controlling the adaptation data of a plurality of white subpixels corresponding to the target line among a plurality of adaptation subpixels to generate output data.

Abstract: A system for facilitating a consumer's selection of customized color-changing lenses for eyewear, or windows, captures a digital color image of at least the face of the consumer and displays that color image to the consumer on a video display while superimposing a pair of lenses over the eyes. The display simulates the color of the superimposed lenses when made of a selected photochromic or thermochromic material. The color of the superimposed lenses is changeable, in response to consumer-controlled inputs, over a range between (a) an initial color for the lenses when subjected to at least one of (i) a first predetermined temperature and (ii) a first predetermined light condition, and (b) a final color for said lenses when subjected to at least one of (i) a second predetermined temperature higher than said first predetermined temperature and (ii) a second predetermined light condition brighter than said first predetermined light condition.

Abstract: An image processor including: a color converting unit converting an original image to a brightness image and a chromaticity image; an illumination image generating unit generating, from the brightness image, an illumination image; an image generation processing unit executing a processing for generating a brightness reproduction image which is reproduced so that visibility of the original image is enhanced, based on the brightness image, the illumination image, and an enhancing degree information which represents an enhancing degree of a reflection rate component of the original image, a chromaticity adjustment image generating unit generating a chromaticity adjustment image by adjusting chromaticity of the chromaticity image, and a color reverse converting unit performing a conversion reverse to a color conversion performed by the color converting unit, with respect to the brightness reproduction image and the chromaticity adjustment image.

Abstract: According to one embodiment, a given tile, made up of pixels or samples, may be of any shape, including a square shape. These pixels may contain colors, depths, stencil values, and other values. Each tile may be further augmented with a single bit, referred to herein as a render bit. In one embodiment, if the render bit is one, then everything is rendered as usual within the tile. However, if the render bit is zero, then nothing is rasterized to this tile and, correspondingly, depth tests, pixel shading, frame buffer accesses, and multi-sampled anti-aliasing (MSAA) resolves are not done for this tile. In other embodiments, some operations may be done nevertheless, but at least one operation is avoided based on the render bit. Of course, the render bits may be switched such that the bit zero indicates that everything should be rendered and the bit one indicates more limited rendering.

Abstract: Provided is an image processing device that includes: an image generation section configured to generate a peripheral image in an outer periphery of a first frame image to generate a second frame image that includes the first frame image and the peripheral image; and a coordinate conversion section configured to perform coordinate conversion on the second frame image to generate a third frame image.

Abstract: A method for collocating a clothing accessory on a human body for an electronic apparatus, is provided. A human body picture is shown on a display unit, and a human body description file corresponding to a human body model included in the human body picture is obtained from a database. A clothing accessory picture is obtained from another database based on a user choice, and a clothing accessory description file corresponding to a clothing accessory model included in the clothing accessory picture. The object picture is superposed on the human body picture automatically according to the human body and the object description files.

Abstract: A method for in-vehicle dynamic virtual reality includes receiving vehicle data from one or more vehicle systems of a vehicle, wherein the vehicle data includes vehicle dynamics data and receiving user data from a virtual reality device. The method includes generating a virtual view based on the vehicle data, the user data and a virtual world model, the virtual world model including one or more components that define the virtual view, wherein generating the virtual view includes augmenting one or more components of the virtual world model according to at least one of the vehicle data and the user data and rendering the virtual view to an output device by controlling the output device to update display of the virtual view according to the vehicle dynamics data.

Abstract: A method for in-vehicle dynamic virtual reality includes receiving vehicle data from one or more vehicle systems of a vehicle, wherein the vehicle data includes vehicle dynamics data and receiving user data from a virtual reality device. The method includes generating a virtual view based on the vehicle data, the user data and a virtual world model, the virtual world model including one or more components that define the virtual view, wherein generating the virtual view includes augmenting one or more components of the virtual world model according to at least one of the vehicle data and the user data and rendering the virtual view to an output device by controlling the output device to update display of the virtual view according to the vehicle dynamics data.

Abstract: Techniques described herein provide a method for defining virtual content for real objects that are unknown or unidentified at the time of the development of the application for an augmented reality (AR) environment. For example, at the time of development of an AR application, the application developer may not know the context that the mobile device may operate in and consequently the types or classes of real object and the number of real objects that the AR application may encounter. In one embodiment, the mobile device may detect unknown objects from a physical scene. The mobile device may then associate an object template with the unknown object based on the physical attributes, such as height, shape, size, etc., associated with the unknown object. The mobile device may render a display object at the pose of the unknown object using at least one display property of the object template.

Abstract: A method for in-vehicle dynamic virtual reality, including receiving vehicle data from a portable device, the portable device operably connected for computer communication to an output device, the vehicle data including vehicle dynamics data, and receiving user data from at least one of the portable device or the output device. The method including generating a virtual view based on the vehicle data, the user data and a virtual world model, the virtual world model including one or more components that define the virtual view, wherein generating the virtual view includes augmenting one or more components of the virtual world model according to at least one of the vehicle data or the user data. The method including rendering the virtual view to the output device by controlling the output device to update display of the virtual view according to at least one of the vehicle data or the user data.

Abstract: A method for in-vehicle dynamic virtual reality includes receiving vehicle data and user data from one or more portable devices, wherein the vehicle data comprises vehicle dynamics data of the vehicle. The method includes generating a virtual view based on the vehicle data, the user data and a virtual world model. The virtual world model including one or more components that define the virtual view and wherein generating the virtual view includes augmenting one or more components of the virtual world model according to at least one of the vehicle data and the user data.

Abstract: A method and computing device for providing Augmented Reality (AR) is provided. The method of providing AR includes detecting at least one physical object from a real scene obtained through a camera of a computing device, rendering at least one virtual object at a desired position of the detected at least one physical object on the real scene provided on a display, enabling communication through a command for interaction between the rendered at least one virtual object, and enabling the at least one virtual object to perform an action in response to command communication between the at least one virtual object.

Abstract: In a display control apparatus configured to control image data displayed on a predetermined display medium, an information acquisition unit acquires a first information associated with the predetermined matter at a first time and acquire a second information associated with the predetermined matter at a second time after the first time. A determination unit judges whether there is a predetermined change between the first information and the second information. A control unit controls the image data such that in a case where a predetermined change is detected, at least one of parameters including a location, a size, and a shape of a restricted area, in which the displaying of display information including in the image data is limited, is changed so as to achieve the parameter defined in relation to the second information.

Abstract: One preferred embodiment of the present invention includes a method for transitioning a user interface between viewing modes. The method of the preferred embodiment can include detecting an orientation of a mobile terminal including a user interface disposed on a first side of the mobile terminal, wherein the orientation of the mobile terminal includes an imaginary vector originating at a second side of the mobile terminal and projecting in a direction substantially opposite the first side of the mobile terminal. The method of the preferred embodiment can also include transitioning between at least two viewing modes in response to the imaginary vector intersecting an imaginary sphere disposed about the mobile terminal at a first latitudinal point having a predetermined relationship to a critical latitude of the sphere.

Abstract: An imaging visualization workstation (30) includes a graphical display device (32) and an electronic data processor, and is configured to perform a method including: spatially registering a biopsy sample extracted from a medical subject with a medical image (12) of the medical subject; combining the medical image with a graphical representation of information (20, 22) generated from the biopsy sample to generate a combined image in which the graphical representation is spatially delineated based on the spatial registration of the biopsy sample; and displaying the combined image on the graphical display device of the imaging visualization workstation. A method comprises extracting a biopsy sample spatial sample from a medical subject, processing the biopsy sample to generate biopsy information, acquiring a medical image of the subject, spatially registering the biopsy sample with the medical image, and displaying the medical image modified to include an annotation generated from the biopsy information.

Abstract: Disclosed herein are a display apparatus which facilitates a simultaneous comparison of a plurality of images which respectively illustrate different features on one divided display screen such that the images are seamlessly displayed on the screen, and an image display method which is performable by using the apparatus. The display apparatus includes a memory configured to store a plurality of different types of images of an object, an input device configured to receive an input of a command relating to simultaneously displaying the different types of images, and a display device configured to display images. Upon receiving the command, the display device divides a screen upon which an image of the object is displayable into a first region within which a first image showing one portion of the object is displayed and a second region within which a second image showing the remaining portion of the object is displayed.

Abstract: A display device Includes a control board including a timing controller (TCON) for controlling driving of the display device, and further including a driving memory for storing driving data for driving the display device, and a source board coupled to the control board by a connection cable, the source board including a driving integrated circuit (IC) for outputting a data signal, and further including a panel memory for storing panel characteristic data for compensating for the data signal.

Abstract: A display device includes an acquiring circuit, a calculator, and a delay controller. The acquiring circuit acquires a gray scale voltage of a gray scale value of a pixel. The calculator calculates a first delay correction value based on a voltage currently retained on a data signal line to which the gray scale voltage is output and a gray scale voltage to be subsequently output to the data signal line. The delay controller determines a timing when the gray scale voltage is to be output to the data signal line based on the first delay correction value.

Abstract: Discussed is an organic light emitting display device capable of reducing power consumption and increasing lifespan of the device. The device includes a display panel including pixels in respective pixel regions defined by a plurality of gate lines, data lines and driving voltage lines, wherein each pixel includes an organic light emitting diode which emits light by a current, and a pixel circuit having a driving transistor for controlling a current flowing from the driving voltage line to the organic light emitting diode on the basis of data voltage; and a panel driver for converting frame video data into the data voltage, supplying the data voltage to each pixel, calculating peak luminance value and maximum grayscale value by analyzing the frame video data, and varying the driving voltage based on the peak luminance value and maximum grayscale value.

Abstract: A head-mounted display device includes: an image display unit including an image-light generating unit that generates image light representing an image and emits the image light and a light guide unit that guides the emitted image light to the eye of a user, the image display unit being for causing the user to visually recognize a virtual image; and a control unit that includes an operation surface, is connected to the image display unit, and controls image display by the image display unit. When it is assumed that the user shifts the user's attention from the virtual image, the control unit adjusts the luminance of the image-light generating unit or adjusts the image light generated by the image-light generating unit to reduce the visibility of the virtual image.

Abstract: A technique for driving a column of pixels that include light emitting elements. The technique incorporates feedback data provided from feedback data sources connected to the data line and to feedback line of the array, pixel driving circuit with feedback path. The technique can also include block of the reference elements for input signal corrections.

Abstract: A liquid crystal display includes: a light source unit that includes a light-guiding plate with a light-exit plane partitioned into emission subsections, and one or plural sides, and light sources; a liquid-crystal-display panel that includes pixels, and modulates light emitted from the light source unit, thereby performing image display; and a display control unit that includes a partitioning-drive processing section generating each of a light-emission pattern signal and a partitioning-drive image signal, performs light-emission driving for each light source, and performs display driving for each pixel. The partitioning-drive processing section performs a gain correction of multiplying each pixel signal in the input image signal by a predetermined gain factor that is set so that a value increases as a pixel position of the pixel signal goes away from the light source, and generates the light-emission pattern signal and the partitioning-drive image signal, by using gain-corrected pixel signal.

Abstract: An image sticking controller includes a gamma conversion unit configured to gamma-convert gray scale values respectively corresponding to a plurality of pixels, and to output the gamma-converted gray scale values as gamma conversion values, a data accumulation unit configured to accumulate the gamma conversion values into an accumulation data, the accumulation data including a minimum accumulation value, a maximum difference value indicating a difference between the minimum accumulation value and a maximum accumulation value, and difference values indicating respective differences between the minimum accumulation value and an accumulation value of each of the pixels, an image sticking analysis unit configured to output an image sticking decrease control signal when the maximum difference value is greater than a reference value, and a data conversion unit configured to convert the gray scale values in response to the image sticking decrease control signal, such that image sticking is reduced.

Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.

Abstract: A display apparatus includes: a pixel array section including a row of scanning lines, a column of signal lines, and pixels in a matrix, each of the pixels disposed at an intersection of both of the lines; and a drive section. The drive section performs line progressive scanning on the pixels. The pixel includes a light emitting device, a sampling transistor, a driving transistor, a switching transistor, and a holding capacitor. The sampling transistor samples a video signal in the holding capacitor, the driving transistor changes the device to a luminous state, the switching transistor becomes ON in advance of the sampling of the video signal to change the light emitting device to a non-luminous state, and the sampling transistor takes in the OFF voltage from the signal line to the driving transistor, thereby preventing a penetration current from flowing from the power source toward the fixed potential.

Abstract: The invention relates to an electronic device comprising a limited colour display and a method of driving the display. The display has an array of pixels, a driver for driving each of said pixels in said array and a colour filter which is aligned with said display whereby each of said pixels is sub-divided into a plurality of sub-pixels of different colours. The method comprises receiving a target image; generating a brightness image for said target image by determining a brightness value for each sub-pixel within said display; generating an output signal from said brightness image by determining an output value for each of said plurality of sub-pixels of different colours within the brightness image; and outputting said output signal to said driver to drive the display.

Abstract: A control circuit conducts a drive control of a RGBW display panel to operate white pixels to light up together with red, green and blue pixels, where the drive control includes a luminance control of a backlight to reduce luminance of the backlight according to an amount of an increase in luminance of the display panel due to a lighting operation of the white pixels. The control circuit includes: a first circuit section configured to generate control signals for controlling the display panel; and a second circuit section configured to generate control signals for controlling the backlight. The first circuit section includes a redistributing circuit section configured to distribute a luminance component of each white pixel to corresponding the red, green and blue pixels and reduce luminance of the each white pixel when the display panel has a white chromaticity dependence on gradation values.

Abstract: A liquid supply device includes a first container storing liquid; a second container to which the liquid is supplied from the first container; at least one flow path to connect the first and second containers; a valve in the flow path to allow or interrupt the flow of the liquid in the flow path by opening or closing the valve; a pump provided to the flow path to transfer the liquid from the first container to the second container; and a control unit to operate the pump under a state in which the valve is opened to transfer the liquid in the first container to the second container, then close the valve and stop the pump, and then open the valve under a state in which the pump is stopped to transfer the liquid in the second container to the first container.

Abstract: Provided is a liquid ejecting apparatus which includes a plurality of liquid receiving portions in which the same kinds of liquid are received, a switching unit which switches the liquid receiving portion that supplies the liquid to a liquid ejecting head, and a controller which performs a maintenance process including discharging the liquid through the liquid ejecting head, in which, when a liquid residual amount of the liquid receiving portion that supplies the liquid to the ejecting head, which is calculated by a residual amount estimation portion, is less than a determination value, the controller performs the maintenance process in a state where the liquid receiving portion to supply the liquid to the liquid ejecting head is selected among the plurality of liquid receiving portions and the liquid is supplied from the selected liquid receiving portion to the liquid ejecting head.

Abstract: A droplet ejecting apparatus which includes a control unit which controls a recording operation in which dots are recorded on a medium by performing multipass recording in which recording of dots which are located in one main scanning line which goes along a main scanning direction is completed in a recording operation in the main scanning direction of N times (N is integer of 2 or greater), and a maintenance operation in which maintenance with respect to an ejecting unit is performed, in which the control unit performs a control so that at least recording operations in the main scanning direction of (N?1) times is performed between the previous maintenance operation and the subsequent maintenance operation when performing maintenance operations of a plurality of times.

Abstract: An inkjet printhead includes an inkjet nozzle with a main actuator and at least one peripheral actuator in the same firing chamber. When the inkjet nozzle has sat idle, both the main actuator and the peripheral actuator are activated to jet at least one ink drop to renew the inkjet nozzle to mitigate decap conditions. When the inkjet nozzle has not sat idle, only the main actuator is activated to jet ink drops. The ink drops jetted by activating both the main and the peripheral actuators and the ink drops generated by activating only the main actuator have the same drop weight and drop velocity.

Abstract: A printing apparatus includes a driving signal generation unit that generates a driving signal; a piezoelectric element that displaces according to the signal; a cavity whose inside is filled with an ink and in which a pressure in the inside is increased or decreased due to the displacement of the piezoelectric element based on the signal; an ejection unit that includes a nozzle communicating with the cavity and capable of ejecting the ink filled in the inside of the cavity by the increase or the decrease of the pressure in the inside of the cavity; a residual vibration detection unit that detects a change of an electromotive force based on the change of the pressure in the inside of the cavity; and an ejection state determination unit that determines an ejection state of the ink in the ejection unit based on the detection result of the residual vibration detection unit.

Abstract: A printing apparatus which performs printing by using an ink jet method includes an ink jet head including nozzles which eject ink droplets on a medium, a landing position reading unit which reads a landing position which is a position on which ink droplets are landed on the medium, and a landing state determination unit which determines whether or not a landing position is deviated from a normal position which is set in advance based on a landing position which is read by using the landing position reading unit.

Abstract: A liquid ejecting apparatus includes: a liquid ejecting head that ejects a light-curable UV ink onto a medium; an irradiator that irradiates the UV ink ejected onto the medium with UV light and cures the UV ink; a control device that controls intensity of the UV light applied from the irradiator to the medium; and a carriage motor that moves the irradiator in one direction, in which the control device changes the intensity of the UV light applied from the irradiator to the medium while the carriage motor moves the irradiator in one direction.

Abstract: A printing apparatus includes: a nozzle head that has nozzles ejecting ink that is cured by an electromagnetic wave and relatively moves with respect to a printing medium; an applying section that relatively moves together with the nozzle head, and applies the electromagnetic wave; and a control section that controls intensity of the electromagnetic wave, in which a first intensity of the electromagnetic wave in a region in which the applying section and the printing medium face each other and that is a constant speed region in which a speed of the relative movement is constant is greater than a second intensity of the electromagnetic wave in regions in which the applying section and the printing medium do not face each other in at least a part thereof and that are acceleration and deceleration regions in which the speed of the relative movement is not constant.

Abstract: The UV opacity from 0 to 100% in one inkjet pass, and the visual color, of solvent-based inks is controlled by the amounts of pigments, dyes, UV blockers and UV brighteners in the inks. The depth-of-cure in photopolymers is controlled by these factors and the % laydown of the ink in one pass.

Abstract: A recording apparatus has a controller that controls a conveying roller and a discharge roller for conveying a recording medium. The controller controls the rotation phases of the conveying roller and the discharge roller when the recording medium leaves the conveying roller before the recording medium enters the conveying roller.

Abstract: Systems and methods are disclosed for determining an operational range of colorant densities and heating powers that result in successful drying for a print media that is based on a drying quality of test images printed by a printing system. One embodiment comprises a printing system that applies colorant onto a continuous-form medium and applies heat to the medium based on a heating power. The printing system prints a plurality of test images onto the medium, where one or more of a colorant density and a heating power vary for each of the printed test images. The printing system determines a drying quality for the printed test images, and calculates an operational range of colorant densities and heating powers for the medium based on the drying quality of the printed test images.

Abstract: A liquid discharge head has a substrate having an inorganic material layer, an organic material layer, and an intermediate layer contacting the inorganic material layer and the organic material layer between the inorganic material layer and the organic material layer, in which the intermediate layer contains a resin having three or more cyclohexene oxide skeletons in the molecules, a photocationic polymerization initiator, a thermal cationic polymerization initiator, and an onium salt containing a cation portion structure represented by (d1) and an anion portion structure represented by (d2).

Abstract: Provided is a black ink composition containing a pigment, wherein the value calculated from the average particle diameter and the particle size distribution width of the pigment and the ink viscosity is regulated within a certain range, and the number of coarse particles contained in the ink composition is regulated to a certain value or less. The ink composition is excellent in ink storage stability and can give an image realized with good balance between color development, in particular, in high-speed printing and inhibition of a time-dependent change in printing density due to pigment sedimentation.