Abstract: A mat for an image pickup apparatus, where the image pickup apparatus operates to recognize a real object, the mat includes: a play field that defines a bottom region of a space in which the real object is placed; and a calibration chart located in the space and having a plurality of color regions in which respective luminances thereof differ from one another, where: the image pickup apparatus: (i) obtains data of a picked up image of the space in which the real object is located; and (ii) evaluates the picked up image and adjusts at least one of an image pickup condition in which the picked up image of the space is taken, and a processing condition in which the data are analyzed to recognize the real object, and at least one of the image pickup condition and the processing condition are adjusted based on color information in the data of the picked up image resulting from the plurality of color regions of the calibration chart.

Abstract: Disclosed is an image correction method of correcting an image including a number of horizontal image scan lines each corresponding to a number of pieces of image data. The method includes the following steps: segmenting each of the horizontal image scan lines into a plurality of segments according to a plurality of nodes, each of the segments having an original segment length; looking up a table to generate at least one correction parameter according to a selection signal; generating a gain value according to a control signal; correcting the original segment length to generate an adjusted segment length according to the gain value and the correction parameter; and altering positions of the plurality of nodes to correct the image according to the adjusted segment length.

Abstract: A complex image display device comprises a light source, an illumination optical module, a micro display module, at least one optical projection module, at least one image-light-path switch module, an image-light-path control unit, and at least one image display screen, wherein the light source provides a light beam, the illumination optical module receives and shapes the light beam, continuously the light beam is projected by the illumination optical module. The micro display module provides an image-to-be-displayed and the light beam is then modulated by the image to become at least an image-modulated light beam for displaying. Then, the optical projection module receives and magnifies the image-modulated light beam. Continuously, the image-light-path switch module receives the magnified image-modulated light beam and switches the light path of the light beam.

Abstract: A complex image display device comprises a light source, an illumination optical module, a micro display module, at least one optical projection module, at least one image-light-path switch module, an image-light-path control unit, and at least one image display screen, wherein the light source provides a light beam, the illumination optical module receives and shapes the light beam, continuously the light beam is projected by the illumination optical module. The micro display module provides an image-to-be-displayed and the light beam is then modulated by the image to become at least an image-modulated light beam for displaying. Then, the optical projection module receives and magnifies the image-modulated light beam. Continuously, the image-light-path switch module receives the magnified image-modulated light beam and switches the light path of the light beam.

Abstract: The invention is directed to various calibration techniques for calibrating an imagining device such as a display device, a printer, or a scanner. The techniques may involve characterizing the imaging device with a device model such that an average error between expected outputs determined from the device model and measured outputs of the imaging device is on the order of an expected error, and adjusting image rendering on the imaging device to achieve a target behavior. The invention can achieve a balance between analytical behavior of the imaging device and measured output. In this manner, adjustments to image rendering may be more likely to improve color accuracy and less likely to overcompensate for errors that are expected.

Abstract: The present invention provides an audio information support system comprising an image display device (1) which shows an image, an audio output device (2) which outputs an electromagnetic wave modulated by audio information toward any given positions in the image shown on the image display device (1), and an audio reproducing terminal (3) which receives the electromagnetic wave at the position in the image, converts it to an electric signal and reproduces sound from that electric signal, wherein audio information support can be individually realized for each of the users watching the image.

Abstract: An apparatus displays a video signal (VID) by means of a scan (SCAN). The apparatus may be, for example, a television set. The apparatus comprises a device (SCAVEM) for modulating the scanning rate (Vscan) as a function of the derivative (DLUM) of a luminance signal (LUM) extracted from the video signal (VID). This enables the subjective display quality to be improved. The apparatus has the following characteristic feature in order to obtain an even better quality, notably when the apparatus is used for displaying video signals of different types. The derivative (DLUM) of the luminance signal, as a function of which the scanning rate (Vscan) is modulated, is obtained by means of a difterentiator circuit (DIFF) having a controllable frequency response (CFR).

Abstract: The invention is directed to various calibration techniques for calibrating an imagining device such as a display device, a printer, or a scanner. The techniques may involve characterizing the imaging device with a device model such that an average error between expected outputs determined from the device model and measured outputs of the imaging device is on the order of an expected error, and adjusting image rendering on the imaging device to achieve a target behavior. The invention can achieve a balance between analytical behavior of the imaging device and measured output. In this manner, adjustments to image rendering may be more likely to improve color accuracy and less likely to overcompensate for errors that are expected.

Abstract: A dual mode laser projection system having a film mode and an electronic mode that can be used to project an image onto a screen. In the film mode an image is projected by illuminating film with lasers, and in the electronic mode an image is created by modulation of with lasers with data to project an electronic image. The laser source may comprise a plurality of lasers each providing a different color, such as red, green, and blue. Laser-CRTs may be used. In some embodiments the laser source is synchronized with the film aperture so that the laser source is modulated to illuminate the film aperture only while a frame of the film is stopped. In some embodiments the color temperature of the light illuminating the film can be selected by increasing and/or decreasing the relative light intensity contribution of each of the lasers.

Abstract: A display apparatus using clamps for coupling an electron gun unit with a video unit is provided. The display apparatus may be constructed using a panel on which a picture is displayed, a funnel fastened to the panel, an electron gun inserted into a neck of the funnel, a video unit coupled with the electron gun for transmitting a video signal, and first and second clamps respectively coupled with the electron gun and the video unit for preventing the video unit from separating from the electron gun. With this configuration, the video unit is easily combined to the electron gun and prevented from separating from the electron gun.

Abstract: In a projection CRT, an image of high brightness is displayed on a screen as an electron beam emitted from an electron gun is scanned according to an image driving signal. The image is magnified and projected through a lens unit. Here, voltage of a direct current component of the image driving signal is lower than threshold voltage of the screen for scan time and also lower than threshold voltage of the electron gun for retrace time.

Abstract: A display apparatus has a cathode ray tube bulb which includes a panel displaying a picture thereon, a funnel combined with the panel, and a neck connected to the funnel. The display apparatus further comprises an electron gun unit which includes an electron gun main body inserted into the neck and a boss part protruding from the neck at a rear part of the electron gun main body and having a plurality of pins disposed therearound, and a video unit which includes a video PCB disposed parallel to the axis of the neck and a boss holder vertically provided on the video PCB and combined with the boss part so as to transmit a video signal from the video PCB to the electron gun unit. With this configuration, space for installation of the video PCB is minimized, and the video unit is not easily separated from an electron gun unit.

Abstract: A cathode current limiting circuit and method for use with projection color television display systems to prevent overheating and possible cracking of the blue cathode ray tube (CRT) when a continuous blue background is presented. The circuit monitors differences between the respective low level red, green, blue (RGB) signals sent from the video signal processor to the CRT drive which produces the respective RGB cathode or beam currents. When the low level blue signal exceeds both of the red and the green signals by a predetermined differential, the circuit sends a feedback signal to the video signal processor to limit the blue signal and thus the cathode current from the CRT drive.

Abstract: A cooling medium and a cooling device for optical equipment using the same, which cooling medium has a refractive index in a specific range, hardly causes the problem to dissolve or swell plastic lens and other component parts, and is flame retardant. The cooling medium comprises a cyclic aliphatic hydrocarbon having at least one cross linkage and has a flash point of 120° C. or above and a melting point of −20° C. or below. The space between a pair of transparent optical members of a cooling device for optical equipment, is filled with the cooling medium.

Abstract: An optical system in a projection television receiver includes: a screen for simultaneously displaying R (Red), G (Green) and B (Blue) images thereon; and a light source part comprising R, G and B cathode ray tubes. The R and B cathode ray tubes project the R and B images on the screen via a reflecting mirror, whereas the G cathode ray tube is set together with the R and B cathode ray tubes in a delta type array and projects the G image directly on the screen.

Abstract: A video display deflection circuit includes a source of a video signal for displaying picture information contained in the video signal in a screen of a cathode ray tube. The video signal provides selectively on-screen-display information and non-on-screen-display information. A source of a first control signal has a first value, when the video signal provides on-screen-display information and a second value, when said video signal provides non-on-screen-display information. A waveform generator is responsive to the first control signal for generating a second signal at a frequency that is related to a deflection frequency having a first waveform, when the video signal provides on-screen-display information, and a second waveform, that is different from the first waveform, when the video signal provides non-on-screen-display information.

Abstract: A CRT assembly of a projection TV system includes a CRT for forming an image, a projection lens for magnifying and projecting the image formed by the CRT, a coupler installed between the CRT and the projection lens, a coolant receiving portion formed at the center of the coupler, having a front surface in contact with the projection lens forming a seal and a rear surface in contact with a front surface of the CRT forming a seal, a coolant injection hole formed to penetrate the side of the coolant receiving portion, through which coolant is filled in the coolant receiving portion, and a pressure control device for controlling the pressure of coolant in the coolant receiving portion while sealing the coolant injection hole.

Abstract: A cathode-ray tube (CRT) assembly of a projection television is provided. The CRT assembly includes a CRT for creating an image, a lens for magnifying the image created in the CRT and projecting the image onto a screen, a coupler, disposed between the CRT and the lens, within which a cooling liquid receptacle filled with a cooling liquid is provided, a cooling liquid pouring inlet disposed on one side of the coupler and pouring the cooling liquid into the cooling liquid receptacle, and an oilpack connected to the cooling liquid receptacle so that a portion of the cooling liquid is contained when the cooling liquid filled in the cooling liquid receptacle expands.

Abstract: The present invention provides a display apparatus for discharging and removing needless cooling liquid consistently when the display apparatus for cooling a cathode ray tube with cooling liquid is fabricated and relates to a display apparatus for cooling cathode ray tubes with cooling liquid is provided with a cooling liquid container for containing cooling liquid for cooling the cathode ray tubes, a sealing member for sealing cooling liquid in the cooling liquid container by plugging a cooling liquid charging hole formed on the cooling liquid container after cooling liquid is charged into the cooling liquid container, and a residual cooling liquid discharging outlet provided with connection to the sealing member and the cooling liquid container for discharging residual cooling liquid in the space between the sealing member and cooling liquid container to the outside though the space between the sealing member and the cooling liquid container.

Abstract: A horizontal automatic frequency control (AFC) used in a display having a display device such as a cathode ray tube (CRT) is provided. The AFC circuit reduces a horizontal distortion and horizontal jitter on the CRT. The AFC circuit includes a video signal processor for demodulating and converting an input video signal into a desired signal such as a YUV signal or an RGB signal, a synchronous separator for separating a synchronizing signal from the video signal, a dual-port line memory, an Hout generator for generating a horizontal driving pulse which drives a horizontal deflection yoke, a read clock generator for generating a read clock (RCK) signal which is synchronized in phase with a flyback pulse, and a horizontal deflection driver for controlling horizontal deflection of the CRT and generating the flyback pulse. The line memory absorbs a horizontal position change of a displayed image caused by a temperature change or a load change in the horizontal deflection driver.

Abstract: A video image projection apparatus is disclosed. The apparatus uses a laser as a light source and modulates the light beam using a modulator according to an image signal. The apparatus projects the modulated light to a screen using a light scanning system. The laser display system includes three primary color laser light sources, an optical system needed for three-color light combining/separation, a light modulator loading the image signal into the three-color laser, and a driving circuit driving the system by processing the video signal electronically. A hybrid video laser color mixer has a structure that combines very small-sized hybrid light beam combining/separation optical elements and a 3-channel light modulator. It allows the size of the image projection apparatus to be about 6 by 5 by 3 centimeters. Additionally, the light alignment of the elements is close to self-alignment.

Abstract: In a CRT display and a television set having the same, horizontal/vertical synchronizing signals are separated from a video synchronizing signal in a synchronizing separation circuit, and position information S of a vertical frame is generated on the basis of the horizontal/vertical synchronizing signals in a count-down processor and then converted to corrected vertical frame information W in a function circuit to output a vertical deflection waveform signal and a horizontal deflection correcting waveform signal. Further, the corrected vertical frame information W is compared with predetermined voltages in comparators to detect an effective frame range in the vertical direction.

Abstract: In a projection type video display device comprising a light writing type spacial light modulator, disturbances brought about by a resetting pulse and appearing in a projected picture as a black belt or beat are prevented. This is accomplished by causing the resetting pulse, which is to withdraw electric charges produced by incoming writing light and accumulated in spacial light modulator, to occur within a vertical blanking period synchronized with vertical synchronization signal.Further, by changing the pulse width and the voltage of the resetting pulse in accordance with vertical synchronization frequency, pictures of a certain fixed brightness are made available against various vertical synchronization frequencies; and even with a high vertical synchronization frequency, projected pictures are never annoyed by such disturbance that is caused by a resetting pulse dislocated out of the vertical blanking period.

Abstract: In a projecting unit of a projector, a projecting tube is sealingly attached to a projecting tube frame by means of a packing member, a projecting lens is sealingly attached to a projecting lens frame by means of a packing member, and an image on the projecting tube is projected on a screen by the projecting lens. A packing member is interposed between and in engagement with the frames such that the frames are sealingly attached, and can slide against said packing member. The frames are secured to each other for use of the projecting unit, or separated from each other to permit adjustment of the space between the frames.

Abstract: An electrostatic probe device detects signals displayed on a cathode ray tube in a non-invasive manner. Specifically, the probe device includes a probe that is spaced from a fluorescent screen of a cathode ray tube by a dielectric material and a detection circuit coupled to probe. The detection circuit produces an output signal that corresponds to an input video signal supplied to the cathode ray tube. In a preferred embodiment, the probe is located directly on a face plate of the cathode ray tube, wherein the face plate acts as the dielectric material. Voltage fluctuations detected by the probe are equalized by the detection circuit. The detection circuit may also include amplification and inverter circuits, so that the output of the detection circuit can be supplied to a monitor for viewing. The image displayed on the monitor directly corresponds to the image displayed on the cathode ray tube.

Abstract: A cathode ray tube package includes a cathode ray tube assembly and a housing assembly including a deflection coil and/or at least one focus coil. The cathode ray tube assembly includes a collar (31) aligned with the electron beam, being arranged to mate with a mounting collar (41) carried on the housing assembly. The provision of the collar (31) enables the cathode ray tube assembly to be easily replaced at the end of the cathode ray tube's life within the housing assembly without the need for realignment of the coils.

Abstract: A single-tube type projection display with high light efficiency includes phosphors of three primary colors formed on upper, middle and lower portions of a faceplate of a CRT. Images of three colors are projected on the phosphor layers, and a color picture is obtained by overlapping the three color images on the screen by the projection lenses.

Abstract: A compact display system simulates a panoramic view to an observer located at a central viewing station. A toric mirror, comprising a compressed portion of a sphere, has a concave reflective surface disposed in surrounding relation to the given viewing station while a spherical rear projection screen which receives projected image light on its inner surface presents a panoramic image to the toric mirror from its outer surface. A plurality of projectors are disposed tangentially above the upper periphery of the rear projection screen and project associated portions of the light image onto the inside of the screen via fold mirrors. Each projector includes a high intensity CRT and a color shutter.

Abstract: A high definition television monitor which raises the level of a convergence voltage by a predetermined voltage in one of two consecutive horizontal periods in which the same video signal is produced, writes the same video image twice on the same line during the consecutive 2H, thereby displaying a video image of the normal standard on a CRT display with a satisfactory picture quality.

Abstract: Projecting-type display apparatus, wherein an image forming means frame is supported in such a manner as to be rotatable within a first plane perpendicular to an optical axis of a projection lens, and within a second plane including the optical axis and perpendicular to the first plane. A projecting-type display apparatus comprising means for changing the distance between an image forming means frame and a lens frame continuously or stepwise. A projecting-type display apparatus comprising means for changing the field angle of a projection unit having image forming means and projection lens with respect to a sreen cointinuously or stepwise.

Abstract: A 2-CRT type projection apparatus having a green and blue two-color cathode ray tube and a green and red two-color cathode ray tube and producing a projected picture of high resolution and brightness. The green phosphor of one of the two-color cathode ray tubes is a phosphor which emits green light of high brightness and the green phosphor of the other cathode ray tube is a phosphor which emits green light extending a color reproduction range. Further, stripe directions of the two-color cathode ray tubes are substantially perpendicular to each other.

Abstract: A liquid cooling type projector is provided with greater flexibility to meet different screen sizes of a projection television and, thus, contributes to the reduction of production cost. The projector has a cylindrical frame containing a projection lens unit mounted by a liquid-tight member thereto and coupled at a rear end to a CRT in liquid-tight arrangement such that a liquid-sealing space is established between the projection lens and the CRT. In particular, the projection lens unit is arranged so as to be movable with respect to the frame along its optical axis. Also, the liquid-tight member is arranged to maintain the liquid-tight condition regardless of the position of the projection lens unit relative to the frame. Thus, the projection lens unit can arbitrarily be displaced towards and away from the CRT, increasing a focusing range.

Abstract: A projection liquid crystal display (LCD) system includes a liquid crystal display panel including a first plurality of horizontally aligned transparent conductive scanning electrodes and a second plurality of vertically aligned transparent conductive signal electrodes disposed on opposed surfaces of the panel. Light directed onto the display panel's aft surface is transmitted through the panel as each horizontal linear array of electrodes is turned "ON", with the horizontal linear arrays sequentially turned on for vertically scanning the display panel in a stepwise manner. LCD backlighting is provided by a cathode ray tube (CRT) having a phosphorbearing faceplate which emits light when an electron beam is incident thereon. The CRT includes two electron beams which are directed onto the faceplate's inner phosphor layer and are deflected in opposed directions along a common horizontal scan line, where each horizontal scan line on the CRT's faceplate is traced in sequence by the two beams.

Abstract: The television apparatus of the present invention is a apparatus which displays an image corresponding to a television signal, where an image signal is received and, by use of the received image signal, a first image signal and a second image signal are generated, between which time axis is deviated by n times (n is an integral number of 2 n 10) of horizontal scanning period, and by providing a cathod ray tube which simultaneously emits a first electron beam corresponding to the first image signal and a second electron beam corresponding to the second image signal, so that a high precision picture can be displayed and at the same time the brightness of display can be improved.

Abstract: A projection liquid crystal display (LCD) system includes an LCD panel including a first plurality of horizontally aligned transparent conductive scanning electrodes and a second plurality of vertically aligned transparent conductive signal electrodes disposed on opposed surfaces of the panel. Light directed onto the aft surface of the display panel is transmitted through the panel as each horizontal linear array of first scanning electrodes is turned "ON", with the horizontal linear arrays sequentially turned on for vertically scanning the display panel in a stepwise manner. Liquid crystal display backlighting is provided by a cathode ray tube (CRT) having a phosphor-bearing faceplate which emits light when energetic electrons in the form of a horizontal, linear, elongated beam are incident thereon.

Abstract: A system for adjusting the white balance of a projector type color display device is shown. The color display device includes three single color cathode ray tubes from which single color beams are projected onto a screen to form a colored image on the screen. The white balance adjusting system comprises a first device for feeding one of the three cathode ray tubes with all white signal to cause the same to project a single color image on the screen; a second device for detecting a luminance value of the single color image on the screen; a third device for deriving luminance values of the other single color images from the detected luminance value; and a fourth device for controlling the selected cathode ray tube in such a manner that the derived luminance values are put in a tolerance which is provided for dealing with a noise of the second device.