摘要:
A field sequential color display apparatus for sequentially displaying RGB field images so that a color frame image can be observed, comprising: an LCD display device for displaying RGB field images; a timing generation/control circuit for controlling the order of RGB field images to be displayed on the LCD display device; a pixel shifting unit for causing the beam of each pixel displayed on the LCD display device to be shifted by each frame image so as to enhance the resolution of image observed by a viewer; and an optical system for making it possible to display an image before shifted at the pixel shifting unit and an image after the shift. Among the RGB field images, the G field image having highest spectral luminous efficiency is displayed at an intermediate order within the frame images so that leakage thereof is not caused by the pixel shifting operation.
摘要:
A motor speed resolution enhancement method and system. A display system controller (202) measures the frame rate of an incoming signal to determine the desired color wheel speed. A digital speed control word (212) representing the desired color wheel speed is written to the motor control circuit (204). The motor control circuit uses the digital speed control word (212) to generate analog control voltages (214) that drive the motor (206). The motor controller (204) also detects the position of the motor and generates a series of commutation interrupts (216). The display system controller 202 accurately measures the input signal's frame rate to determine the proper rate at which to spin the color wheel. The resulting desired speed word has a higher resolution than the motor control circuit (204) is able to receive. The disclosed invention provides a method of increasing the resolution of the digital speed control word (212) without upgrading the resolution of the motor control circuit (204). The disclosed invention uses feedback signals from the motor control circuit (204) that occur several times each revolution to force an update of the digital speed control word (212). The periodically updated digital speed control word (212) is dithered so that the average digital speed control word value represents the desired speed of the motor.
摘要:
A beam index type cathode ray tube for preventing distortion of index signals due to high frequency noises by protecting an optical detector and an index circuit part from the influence of high frequencies which are generated during the operation of the cathode ray tube, which includes a phosphor screen formed on an inner surface of a panel and having index stripes, an electron gun for emitting electron beams toward the phosphor screen, index light incident part formed on outer peripheral surfaces of respective light receiving windows of a funnel to be provided with the index light signals emitted from the index stripes via the respective light receiving window, optical cables respectively connected to the index optical incident parts for transmitting optical signals, an optical detector converting the optical signals provided from the optical cables to index current signals, an index circuit part synchronizing the index current signals with a color switching signal so as to transmit a precise color switching signal to the electron gun, and a high frequency shut-off part shutting off the optical detector and the index circuit part to block influence of high frequency noises.
摘要:
A dual-mode image display apparatus includes a black-and-white image display device and a selective filter. The selective filter is caused to assume a first mode in which it sequentially serves as red, green and blue filters, and a second mode in which it transmits all the color components. Thus, the image display apparatus can selectively perform color display or black-and-white display. The selective filter may include variable optical retarders and may be caused to selectively assume the first mode or the second mode through control over the variable optical retarders. The selective filter may alternatively be moved by a motor between a first position in which the filter is in the path of light from the display device to the viewer, and a second position in which the filter is out of the path of light. A power supply controller is also used to conserve power by turning unneeded parts of a color image processing circuit OFF when the display apparatus is in the second mode.
摘要:
A large area display has a plurality of cathode ray tubes mounted adjacent each other in X, Y matrix and each cathode ray tube includes a plurality of pixels arranged in an X, Y matrix on a front panel and each pixel comprises three horizontally extending stripe-shaped luminous elements aligned in the vertical direction and the front panel of the cathode ray tube is formed with a thinner portion adjacent its outer edge where it joins to the funnel to reduce the spacing between adjacent cathode ray tubes to a minimum to allow the pixels to be viewed over a wider angle.
摘要:
A large screen image display device has a rear wall on which a plurality of striped vertical addressing electrodes are formed, a front wall to which a conductor and phosphor are laminated, and mutually spaced side walls to form an evacuated enclosure wherein the conductor and the addressing electrodes confront each other. Linear thermal cathodes are disposed in rows orthogonal to the addressing electrodes for emitting thermal-electrons. At least one modulation electrode is located between the thermal cathodes and addressing electrodes in parallel to the respective thermal cathode. Horizontal focusing deflection electrodes are arranged opposite to and in parallel to both sides of the thermal cathodes. A control circuit supplies control signals to the above mentioned electrodes for operating the device.
摘要:
1-Aryloxy-3-(substituted alkylamino)-2-propanols having the general information: ##STR1## and their pharmaceutically acceptable salts exhibit cardioselective .beta.-adrenergic blocking activity, and are useful as antihypertensive, cardioprotective, antiarrhythmic and, antianginal agents.
摘要:
A color display system, for example an electronic data display or a color television system incorporates a display screen, for example a cathode ray tube phosphor, and at least one liquid crystal color filter. The screen emits light in the form of visual information in at least two colors, and the filter is controlled electrically in such a way that the colors transmitted by the screen may be switched according to input signal used to energize the screen.
摘要:
MULTIBEAM TUBE GRID MAY BE SWITCHED SO THAT, FOR EXAMPLE, DURING ALTERNATE FIELDS OF A FRAME, DIFFERENT SETS OF ELECTRON BEAMS ARE APPLIED TO THE TUBE FACE.
A LOW BANDWIDTH HIGH BRIGHTNESS DISPLAY SYSTEM THAT UTILIZES A MULTIPLE BEAM CATHODE RAY TUBE TO WRITE A RASTER BY CONCURRENTLY SCANNING A PLURLITY OF LINES WITH A SELECTED NUMBER OF BEAMS. THE SYSTEM THUS REDUCES THE MAXIMUM DATA RATE AND WRITING SPEED RELATIVE TO CONVENTIONAL ARRANGEMENTS WITH A RESULTANT BANDWIDTH REDUCTION PROPORTIONAL TO THE NUMBER OF BEAMS. THE CONCEPT IS APPLICABLE TO FIELD SEQUENTIAL COLOR TELEVISION TO PRODUCE SIMULTANEOUSLY A HIGH RESOLUTION, HIGH BRIGHTNESS AND HIGH QUALITY COLOR DISPLAY. FOR INTERLACE, THE
摘要:
A high brightness, field sequential color television display system utilizing electronically controlled color switching of ferro-electric ceramic wafers. The stationary filter provides a color change electronically and color switching is the result of selected retardations of the signals for each of the basic red, green and blue colors so that a rapid field sequential operation is performed. The system employs two polaroid filters, the polarizer and the analyzer, with a ceramic material positioned intermediate thereto, to control the polarization of the light passing through it by the desired amounts and therefore provide the primary colors. Wavelength selection over a relatively narrow bandwidth is thus achieved by using a material with the property to obtain angles for transmission as a function of the wavelength. The color image is formed in the field sequential fashion by placing the spectral filter in front of a cathode ray tube and observing the various intensities of white light on the face of the tube through the composite filter.