Abstract: An alignment mechanism for aligning an antenna to a satellite configuration is disclosed. An apparatus in accordance with the present invention comprises an antenna for receiving the satellite signals, a mast, for mounting the antenna to a desired location, and an alignment mechanism, coupled between the antenna and the mast, comprising an azimuth mechanism having a predetermined pre-load for adjusting the azimuth position of the antenna, and an elevation mechanism, coupled to the azimuth mechanism, for adjusting the elevation of the antenna, wherein the azimuth mechanism has a radius larger than a radius of the mast, and the azimuth mechanism further comprises a fine adjustment mechanism.

Abstract: A slot antenna including: a dielectric substrate; a conductor pattern formed on a first surface of the dielectric substrate; a ground layer formed on a second surface of the dielectric substrate; a feeding point disposed at substantially a center of one side of the conductor pattern; a microstrip line extending from the feeding point to substantially a center of the conductor pattern; and a slot made with a predetermined width at a position at which the slot straddles a center line of the dielectric substrate, the center line passing through the feeding point, in the ground layer.

Abstract: A log-periodic antenna coupled to a channelizer is described in which matched scale constants for the antenna and the channelizer are used to achieve substantially identical coupling over each fractional bandwidth channel. Embodiments for simultaneous dual polarization operation are described as well as embodiments suited for planar lithographic fabrication.

Abstract: An antenna assembly, and a portable terminal having the same. The antenna assembly according to an embodiment comprises: a circuit board having a ground plane at a predetermined region; first and second antenna conductors spaced from each other at one side of the ground plane; and a shielding wall disposed between the ground plane and the antenna conductors, for reducing a coupling between the first and second antenna conductors. Since a plurality of antennas are mounted at a small space inside the portable terminal with maintaining their functions, an isolation characteristic between the antennas is enhanced, and a mutual coupling between the antennas is minimized.

Abstract: According to various aspects, exemplary embodiments are provided of antenna assemblies. In one exemplary embodiment, an antenna assembly generally includes at least one antenna element having first and second electrical paths. The antenna assembly may also include at least one reflector element spaced-apart from the antenna element for reflecting electromagnetic waves generally towards the antenna element.

Abstract: An electronically controlled monolithic array antenna includes a transmission line through which an electromagnetic signal may be propagated, and a metal antenna element defining an evanescent coupling edge located so as to permit evanescent coupling of the signal between the transmission line and the antenna element. The antenna element includes a conductive ground plate; an array of conductive edge elements defining the coupling edge, each of the edge elements being electrically connected to a control signal source, and each of the edge elements being electrically isolated from the ground plate by an insulative isolation gap; and a plurality of switches, each of which is selectively operable in response to the control signal to electrically connect selected edge elements to the ground plate across the insulative isolation gap so as to provide a selectively variable electromagnetic coupling geometry of the coupling edge.

Abstract: Apparatus and methods that reduce wind loads on polygonal monopoles, such as antenna towers and other telecommunication structures, exposed to winds. A multiplicity of connected segmented truncated conical shrouds are attached along at least a portion of the length of a polygonal monopole (telecommunication structure or antenna tower) that surround it. The presence of the multiplicity of segmented conical shrouds changes the profile of the monopole from multi-sided or faceted polygonal to conical. Based on the specifications of the TIA/EIA-222-F which is the governing code for telecommunication structures, the reduction of the wind load on a 12-sided polygonal monopole is on the order of about 42 percent, on a 16-sided polygonal monopole is on the order of about 18 percent, and on a 18-sided polygonal monopole is on the order of about 9 percent.

Abstract: A clipping communication device includes a first clipping arm unit, a second clipping arm unit, an antenna module and a pivot unit. The first clipping arm unit includes a first force exerting portion and a first clipping portion. The second clipping arm unit has a second force exerting portion and a second clipping portion. The first force exerting portion is disposed corresponding to the second force exerting portion, and the first clipping portion is disposed corresponding to the second clipping portion. The antenna module is disposed in the first clipping arm unit. The pivot unit pivots on the first clipping arm unit and the second clipping arm unit.

Abstract: An antenna system comprises an antenna element, a base plate, and a ground plane. The antenna element is configured to radiate signals, receive signals, or radiate and receive signals. The base plate has a front surface facing the antenna element and a rear surface facing away from the antenna element. The front surface of the base plate has an uncovered area, and the uncovered area of the base plate has no exposed conductive mechanical joints. The ground plane has a front surface facing the antenna element and a rear surface facing away from the antenna element. The antenna system further comprises a capacitive coupling between the base plate and the ground plane formed by an overlap region between the base plate and ground plane. The ground plane is capacitively coupled to the base plate in the overlap region.

Abstract: There is provided a display apparatus including a liquid crystal display having a parallax barrier so that a first image and a second image are respectively visible from different angles on a commonly provided display screen, a backlight that sheds lights from a backside of a liquid crystal panel, a touch operating portion provided at a surface side of the liquid crystal display, and an antiglare layer provided at a surface side of the touch operating portion.

Abstract: The invention relates to an automatic keystone correction system and method. The system includes a projection means to project an image on a projection surface and a means for selecting a maximally distorted corner on the image. And the system includes means for moving the maximally distorted corner from a first to a second position and means for distorting image data responsive to the moving.

Abstract: A scanning image displaying apparatus capable of preferably adjusting a diopter is disclosed. The scanning image displaying apparatus includes a light source, a movable diffusing face, an imaging optical system for forming an image of the light source on the diffusing face, scanning means for two-dimensionally scanning the image of the light source formed by the imaging optical system on the diffusing face, an eyepiece optical system for guiding light from the diffusing face to an observer, and a mechanism for moving the light source and/or at least a portion of the imaging optical system in interlocking relationship with the movement of the diffusing face.

Abstract: A method and system is provided for creating a display and generating images. Creating the display includes receiving a transmissive display component over an emissive display component and positioning each emissive display pixel with one or more transmissive display pixels creating a display surface capable of displaying color images. Displaying images on the display surface includes decomposing image data associated with the image into separate chrominance signal levels and luminance signal levels, displaying the representation of the chrominance signal levels of the image by driving emissive display pixels in correspondence to the chrominance characteristic of the image, generating the representation of the luminance signal levels for display through the emissive display pixels of the emissive display component and filtering the displayed representation of the luminance signal level using transmissive display pixels in accordance with the luminance characteristics of the image.

Abstract: A plasma display panel that includes a first substrate and a second substrate, address electrodes formed on the second substrate, barrier ribs arranged in a space between the first substrate and the second substrate to define a number of discharge cells and non-discharge regions, phosphor layers formed within each of the discharge cells, and display electrodes formed on the first substrate, having a sustain electrode (X electrode) and a scan electrode (Y electrode) in a corresponding pair within each of the discharge cells. The discharge cells are arranged to alternate “A” and “B” sections, where the distances (pitches) between the centers of the adjacent discharge cells are respectively “a” and “b” in which “a” is less than “b”.

Abstract: A plasma display device in which in a sustain period for each subfield, a time point to clamp to a second potential a sustain pulse belonging to a first group including a sustain pulse to be first applied is delayed comparing to a time point to clamp to the second potential a sustain pulse belonging to other groups.

Abstract: A sustain or scan electrode driver for a plasma display device including a power recovery circuit, a voltage storage circuit, and a switching circuit. Power recovery is achieved by a coupling a power source at a minus sustain voltage to the sustain or scan electrode driver circuit that includes a capacitor and an inductor for creating resonance with the panel capacitor and recovering the power used in sustain discharge. Power loss of switches used in the driver circuit may be reduced and power recovery efficiency may be increased by using an additional capacitor in the driver circuit that maintains terminals of the switch at a predetermined level.

Abstract: Disclosed herein are a pixel circuit and driving method for active matrix Organic Light-emitting Diodes (OLEDs), and a display using the same. The pixel circuit includes a Voltage Control Current Source (VCCS), a high gain amplifier, a storage capacitor, and first and second switches. The VCCS is configured to drive OLEDs. The high gain amplifier is configured such that the control input signal of the VCCS causes the VCCS to be placed in an ON or OFF state. The storage capacitor is located between the input terminal of the high gain amplifier and a data line so as to assign the ON-time of the VCCS. The first and second switches are configured to be controlled through a scan line so as to store voltage in the storage capacitor and control the light-emitting time of the OLEDs, and are formed the input terminal of the high gain amplifier and the input terminal of the VCCS, respectively.

Abstract: In the field of video displaying the low video levels do not generate large area flicker. For displaying video sources with higher frame rate, it is therefore the idea of the invention, to extract from two corresponding pixels of two successive video frames a common portion (Vx) that will be displayed at a sub-frequency fv/2 while the individual portions (V1?, V2?) of the corresponding pixels video are displayed at the correct high frequency fv. The time period for displaying two frames is divided into three sub-groups. Two groups of sub-fields with similar sizes, for displaying the individual portions (V1?, V2?) and one group of sub-fields, called extra-codes, for displaying the common portion (Vx). This enables to eliminate large area flicker artifacts from PDPs, when displaying 50 Hz based video norms by using upconverted 100 Hz video sequences and to display real high frequency video on the PDP (ca. up to 120 Hz) without frame dropping.

Abstract: A display is conducted by using a time gray-scale system, in which one frame period is divided into a plurality of sub-frame periods, and a voltage applied to an EL element of a pixel is varied on a sub-frame period basis. Because of this, a display device is provided in which the fluctuations in brightness caused by an environment temperature of an EL element are suppressed with a gray-scale display method that is unlikely to be influenced by variations in characteristics of TFTs in a pixel portion and that is unlikely to be influenced by variations in a display period.

Abstract: A circuit apparatus with LED diodes includes a plurality of circuit branches in which each circuit branch comprises at least one LED diode. The apparatus comprises a device for the supply of said plurality of circuit branches and each circuit branch is connected singularly to the supply device. The supply device comprises a controller suitable for commanding the supply of each circuit branch of the plurality of circuit branches independently from the other circuit branches of the plurality.

Abstract: A luminescent display device is disclosed. The luminescent display device is comprised of an array of pixels, a first driving chip and a second driving chip. The array of pixels is comprised of columns and rows of pixels. The first driving chip is connected a first pixel of the array of pixels, and the second driving chip is connected to a second pixel of the array of pixels. The second pixel is adjacent to the first pixel. The first driving chip is not connected to all pixels in a row of the at least one row of pixels.

Abstract: When electric current is provided to a scan line of a display panel, electric current flowing from an initial end to a final end of the scan line is gradually reduced because of resistance consumption, resulting in lower brightness on both left and right sides of the display panel. Therefore, data line driving signals provided to the display panel are compensated for solving such a problem.

Abstract: A light generating device includes a brightness detector. The brightness detector extracts a brightness data from an image data. The light generating device compensates the uniformity of a white light whenever the image data that is greater than a reference gray scale is input through the brightness detector. Thus, the light generating device may compensate the uniformity of the white light in real time, so that a display apparatus employing the light generating device may improve a high-quality image.

Abstract: A double-faced light emitting diode display includes a pair of parallel shield panels (20, 20?), and a light emitting module (30) located between the shield panels. Each shield panel includes a video contrast enhancement assembly. The light emitting module includes an opaque insulative substrate (31) with a pair of pixel matrixes symmetrically formed on opposite surfaces (310, 310?) thereof and a circuit driving system formed at at least one of the surfaces. Each pixel matrix includes a plurality of pixel units (320, 320?). Symmetrically opposite pairs of pixel units are electrically interconnected so that the shield panels can simultaneously display same images. The double-faced light emitting diode display has a simple structure, a small size, low cost and full color display capability, and can be advantageously applied in traffic signal boards, large-scale display boards, surround cinemas and so on.

Abstract: A liquid crystal display apparatus includes a liquid crystal display module, an integrated driving circuit, and a power supply circuit. The integrated driving circuit is used for driving the liquid crystal display module to display video frames according to a video signal. The integrated driving circuit includes a pulse width modulation (PWM) control circuit for generating N PWM signal sequentially, where N is a positive integer. The power supply circuit is employed to output N DC voltage signals sequentially. A part of the N DC voltage signals is applied to the liquid crystal display module and another part of the N DC voltage signals is applied to the integrated driving circuit.

Abstract: When a video signal type detecting section detects an interlace signal, an I/P conversion section subjects the interlace signal to I/P conversion, and the signal is supplied to an enhancing conversion section. In the enhancing conversion section, the image data is subjected to enhancing conversion, so that optical characteristics of a liquid crystal display panel is corrected. On this occasion, the degradation of the quality of a reproduced image due to the enhancement of unwanted changes (false signal), by causing the degree of the enhancing conversion of the image data having been subjected to the I/P conversion to be lower than the degree of the enhanced conversion of the image data inputted as the progressive signal.

Abstract: A driving apparatus and method of an LCD device improves the brightness and the contrast ratio of an image. The driving apparatus includes an LCD panel for displaying an image corresponding to a data signal. A data driver supplies the data signal to the LCD panel. A gate driver supplies a scan signal to the LCD panel. A picture quality improving unit generates a histogram by dividing brightness components of input data into levels, generates data with an extended contrast ratio, and then generates a brightness control signal according to the average value of the histogram. A timing controller supplies reordered data, and controls the data driver and the gate driver. A backlight provides light to the LCD panel. An inverter drives the backlight based on the brightness control signal.

Abstract: A liquid crystal device that operates in a first operation mode and a second operation mode. The liquid crystal device includes a plurality of scanning lines, a plurality of data lines, a plurality of pixel circuits, a scanning line driving device, and a data line driving device. The plurality of pixel circuits are provided at positions corresponding to intersections of the scanning line and the data lines. Each of the plurality of pixel circuits includes a liquid crystal element that has a first electrode, a second electrode, and a liquid crystal held between the first electrode and the second electrode. A first alignment, which is an initial state, and a second alignment for display are provided for the liquid crystal as an alignment state. The scanning line driving device selects the plurality of scanning lines in a predetermined order.

Abstract: A liquid crystal display and a repair lines structure thereof are provided. In the liquid crystal display, an amplifier is disposed inside an integrated circuit chip, such as a data driver or a scan driver. The amplifier is serially connected to the signal line via a repair line by means of an appropriate connection circuit. Consequently, the problem of signal attenuation occurring in the repair line will be improved.

Abstract: A driving circuit includes a scanning-line driving circuit applying an on potential to sequentially drive scanning-lines, a data-line driving circuit that, when the on potential is applied to each scanning-line, turns each data-line potential to a potential difference corresponding to a density based on a counter electrode potential and a potential corresponding to the same writing polarity among the scanning-lines, and a storage capacitor driving circuit which, when the on potential is applied to the scanning-lines and the data-line potential corresponds to positive polarity writing, shifts the other storage capacitor electrode potential in each storage capacitor to a high level after an off potential is applied to the scanning-lines, and, when the on potential is applied to the scanning-lines and the data-line potential corresponds to negative polarity writing, shifts the other storage capacitor electrode potential to a low level after the off potential is applied to the scanning-lines.

Abstract: A luminance control apparatus of a liquid crystal display device (LCD) is presented. The LCD includes a liquid crystal display panel divided into areas, lamps, an arithmetic unit, and a lamp driver. Fewer lamps are present than the number of areas. The arithmetic unit scans pixels of each area, extracts a peak value of the gray level of pixels of the area, and calculates a maximum peak brightness value and an average value of the area. The lamp driver controls the brightness of the lamps in accordance with the average value and the maximum peak brightness value.

Abstract: A system for generating position information includes a reflector, an image collection system, and a processor. The image collection system is configured to collect at least two sets of image data, where one set of image data includes a stronger indication of the reflector than the other set of image data. The two sets of image data can be collected in many different ways and may include using a retroreflector as the reflector. The two sets of image data are used to generate position information related to the reflector. In particular, position information related to the reflector is generated by taking the difference between the two set of image data. Because one set of image data includes a stronger indication of the reflector than the other set of image data, the difference between the two sets of image data gives a definitive indication of the reflector's position.

Abstract: Provided are an optical module and an input apparatus having the same. The input apparatus includes the optical module having a circuit board provided with a light source and a sensor installed therein, a lens disposed at one side of the circuit board, and a support bracket disposed at the other side of the circuit board; and a main body having a through-hole at its one side and into which the lens of the optical module is inserted. Therefore, it is possible to uniformly maintain the height of the sensor for receiving light based on the thickness of the lens to maintain a certain depth of focus.

Abstract: Thumb and finger guide structure for a computer mouse includes two guides, one located on either side of the mouse. One guide is designed to receive the user's thumb and the other is designed to receive the user's little finger. The structure of the present invention positions the user's thumb and little finger with the user's hand in an open relaxed position. The structure allows the mouse to be moved and lifted without gripping its lateral sides. According to one embodiment, the guide structure of the present invention is retrofitted to an existing mouse by the use of a peel and stick adhesive. According to another embodiment, a computer mouse is provided with the guide structure integral to it and for replacing an existing mouse.

Abstract: In a touch panel, upper and lower electrode connecting portions are provided in the vicinity of a sealing agent formed above extending electrodes, and the upper and lower electrode connecting portions are connected so as to overlap each other. Accordingly, a gap between a height of the overlap of the upper and lower electrode connecting portions and a height of the sealing agent is relaxed. In this way, it is possible to reduce occurrence of cracks on the touch panel upon pressurizing upper and lower substrates.

Abstract: The present disclosure discloses an object position detector. The object position detector comprises a touch sensor formed as a closed loop and having a physical constraint formed on an upper surface of the touch sensor and coextensive with the closed loop. The touch sensor is configured to sense motion of an object proximate to the closed loop. The object position detector also comprises a processor coupled to the touch sensor and is programmed to generate an action in response to the motion on the touch sensor.

Abstract: The invention relates to a signal driving system for a display. The signal driving system comprises: a signal controller, a flexible connector and a plurality of driving devices. The signal controller is used to produce a first control signal. The flexible connector is connected to the signal controller, and used to receive the first control signal. One of the driving devices is connected to the flexible connector. The driving devices connect in cascade. Each driving device comprises a data input port, a data output port and a driving signal output port. The data input port receives the first control signal or a second control signal. The data output port outputs the second control signal. According to the first control signal or the second control signal, the driving signal output port transmits a driving signal. The signal driving system of the invention can make the data output port of the driving device transmit the second control signal to the next driving device.

Abstract: A source unit is configured to receive its main power supply from pin 14 of a DVI-compliant cable connector. A display device is operable to connect its power supply to pin 14 of a DVI-compliant cable connector to accommodate the main power requirements of a source unit.

Abstract: A power supply circuit including: a high-potential-side voltage generation circuit which generates a high-potential-side voltage; a low-potential-side voltage generation circuit which generates a low-potential-side voltage; and a switch circuit which alternately supplies the high-potential-side voltage and the low-potential-side voltage to the common electrode as a common electrode voltage. The power supply circuit performs supply capability control of the common electrode voltage which changes at least one of current drive capability of the high-potential-side voltage generation circuit, an output voltage level of the high-potential-side voltage generation circuit, current drive capability of the low-potential-side voltage generation circuit, and an output voltage level of the low-potential-side voltage generation circuit according to a total value generated based on grayscale data for the number of dots of one scan line.

Abstract: A system and method for analyzing a plurality of data elements having both temporal and spatial properties, where a first data element and a second data element of the plurality of data elements are linked by at least one association element. The system and method include selecting the first data element from the plurality of data elements and providing at least one search criteria for use in analyzing the properties of the plurality of data elements with respect to at least one property of the first data element. An analysis module is used to apply the at least one search criteria to the properties of the plurality of data elements for identifying the second data element from the plurality of data elements and the corresponding at least one association element.

Abstract: An information processing apparatus generating a three-dimensional map on the basis of three-dimensional map data includes rendering area acquiring means for acquiring a rendering area in which the three-dimensional map is generated with respect to a focal point; identifying means for identifying the three-dimensional map data in the rendering area, among the three-dimensional map data including rendering object data that concerns at least one rendering object and that is hierarchized into multiple groups in accordance with characteristics of the rendering object; rendering object data acquiring means for selecting a group on the basis of the distance from the focal point and acquiring the rendering object data in the selected group from the three-dimensional map data in the rendering area; and three-dimensional map generating means for rendering the rendering object on the basis of the rendering object data to generate the three-dimensional map.

Abstract: A method and appertaining system load 3D shape information defining a hearing aid shell into a processor and present a representation of the shell on a display. A fill boundary is entered by a user operating a user input device and a fill region for the shell is thus defined. The fill boundary is then displayed, but can be modified by the user. Various checks may be performed to ensure that the fill region is a proper one, and if not, a status can be provided to the user indicating why the fill region is unacceptable. The displayed shell can be rotated and moved to assist the user. Once an acceptable fill region has been defined, an indication is provided by the user that the displayed fill region is to be used as the actual fill region.

Abstract: This program product causes a computer to function as a unit for setting spectator information including the number of spectators belonging respectively to first and second spectator types, a unit for determining the number of spectators belonging to the respective spectator types to be allocated respectively to each area, a unit for determining the mixture ratio of the respective spectator types in each area, a unit for determining a polygon to be arranged in each area and mapped with a texture containing a plurality of spectators, a unit for determining color pallet data associated with the color of the texture so that the ratio of the spectators belonging respectively to the respective spectator types contained in the texture achieves a state according to the mixture ratio, a unit for mapping the texture defined based on the determined color pallet data to the polygon, and a unit for generating an image.

Abstract: The present invention models hairs by generating hairs by interpolation and then further modifying the interpolated hairs to form clumps. The modified hairs can be iteratively reprocessed to generate more hairs and thereby produce a greater level of detail in the resulting hairstyle. The invention can be used to model any tubular structures protruding from a surface, such as strands of fur protruding from an animal's skin and blades of grass or stems of plants protruding from the ground.

Abstract: Techniques are provided for representation of designs using a basic design which is then modified by a transformation function. In free form deformation techniques the transformation function is defined by a spline function which transforms the space in which the design is defined into a second space where the new modified design is defined. During the design process the parameters of the spline function determine the parameters of the transformation function. While using Evolution Strategies, parameters of the spline function also determine the parameters the optimization algorithm works in. In order to adapt the transformation function optimally to the given problem and the necessary modification a mutation operator is proposed which allows introduction and deletion of control points. Instead of the standard mutation operator in evolution strategies this mutation operator works on the representation of the problem/design.

Abstract: A drawing processing apparatus is provided to solve the problems in which pixels of a drawing primitive with sub-pixel information may have an increased amount of data causing a burden on implementation. A setup processing unit sets up various parameters to allow a digital differential analyzer (DDA) to process the stream of a drawing primitive supplied from a primitive input unit. The DDA performs DDA processing on the drawing primitive supplied from the setup processing unit for conversion into pixel data. The DDA performs the DDA processing on a per rectangular pixel set basis along a scan line to output the pixel data of the drawing primitive on a per rectangular pixel set basis. A compression encoding unit encodes the sub-pixel information of each pixel contained in the rectangular pixel set by run length encoding for output to a FIFO buffer.

Abstract: A shell radiance texture function (SRTF) is defined to record an outgoing radiance from a base volume of an object to be rendered. Using the SRTF, radiance values are precomputed and stored for the base volume. The object is rendered using the precomputed radiance values.

Abstract: Real-time image rendering of diffuse and glossy objects in low-frequency lighting environments captures soft shadows, interreflections, and caustics. As a preprocess, a global transport simulator creates functions over the object's surface representing transfer of arbitrary, low-frequency source lighting into exiting radiance, but including global effects like shadowing and interreflection from the object onto itself. At run-time, these transfer functions are applied to the actual source lighting. Dynamic, local lighting is handled by sampling close to the object at every frame; the object can also be rigidly rotated with respect to the lighting and vice versa. Lighting and transfer functions are represented using low-order spherical harmonics. Functions for radiance transfer from a dynamic lighting environment through a preprocessed object to neighboring points in space further allow cast soft shadows and caustics from rigidly moving casters onto arbitrary, dynamic receivers.

Abstract: Generating a dynamic legend for a drawing developed by a diagramming software program. A drawing sheet module and legend module, logically-coupled to the drawing sheet module, are useful for generating and updating a dynamic legend. The legend module can support the addition of a legend to a drawing sheet. The legend module can also determine if legend symbols should be automatically added to the legend. If legend symbols are added to a drawing sheet, that addition can be automatically reflected in the dynamic legend. Symbols can be converted such that they may be reflected in a dynamic legend.

Abstract: A system and method for determining a spatial arrangement of thematically-related clusters is provided. A convex cluster is selected from a set of convex clusters, which each include shared concepts and terms. A center of mass is determined for the selected convex cluster, which is placed along a vector. An anchor point including at least one open edge formed on the selected convex cluster at an intersection of the vector defined from the center of mass and an edge of the selected convex cluster is located. One or more of the remaining convex clusters in the convex clusters set is selected. The one or more remaining convex clusters are arranged with a center of mass originating outside of the anchor point and on the vector of the selected convex cluster. Overlap of the arranged convex clusters is limited. The arranged convex clusters are displayed.