Abstract: Mini neck tubes rejected for lower gap leakage are reconditioned by connecting together the cathodes, grounding the G3 electrode and applying a high voltage pulse to the G2 electrode using a hand-held sparking coil.

Abstract: The coring circuit in a luminance processor has a characteristic which starts at the O input/O output point and extends linearly in both a positive and negative direction. The characteristic is implemented by a linear amplifier from which the input luminance signal is blocked until it has reached a predetermined threshold amplitude. Low amplitude, high frequency noise is therefore removed without causing overpeaking at high transition levels. The coating stage is preceded in the signal processor by a circuit which furnishes a peaking signal whose rise and fall time are independent of the amplitude of the transition. This circuit is implemented by feeding back the peaked luminance signal through a first filter which has a cut-off at 4 MHz and therefore furnishes a signal responsive both to the change in amplitude and the rate of change of that amplitude, and a second filter whose output is proportional only to the change in amplitude.

Abstract: In-line electron gun structure for color cathode ray tubes in which the final focusing and accelerating electrodes each employ three in-line tapered, partially overlapping apertures in facing relationship, and at least one pair of integral electron beam correctors associated with the central aperture of the focusing electrode. Such structure is produced by deep drawing a workpiece having an hour-glass shaped hole for each corrector pair desired.

Abstract: A method for compressing formatted code is disclosed. According to the method, the code is scanned so that all different burst and pause lengths of the code are found. The lengths are then arranged as elements of an array, with each element having a representative element number. Then, the formatted code is scanned for all possible burst-pause length couples found together. Using the "couple" information as well as the element numbers of the first array, a second array is provided with each element having two nibbles. Both nibbles of the second array element are used to point to an element number of the first array. Finally, a third array which represents the compressed formatted code is generated. The third array is also formed with elements having two nibbles. However, the nibbles of the third array point to the second array element numbers and can properly represent the entire formatted code therewith.

Abstract: A reconfigurable remote control apparatus and method for capturing the signals of transmission devices of at least two different protocols are provided. Because transmission devices either output signal bursts of different lengths at a carrier frequency followed by pauses of different lengths, or pulses of a relatively constant length followed by pauses of different lengths, a first determination is made as to the type of system being captured. After the system type is determined, the carrier frequency and the burst and pause lengths are determined for a burst type system, while only the pause lengths are determined for a pulse-pause type system. The captured information is preferably compressed according to a preferred compression scheme which finds and stores all possible signal lengths and all permitted adjacent signal length combinations for a particular apparatus, and composes and stores a compressed code which acts as a pointer to the stored signal length combinations.

Abstract: An X-radiation protection circuit in a television receiver is responsive to both high voltage and high beam current conditions. A first detector is interconnected with an electron beam power source and monitors the beam current therefrom. The first detector produces a first voltage proportional in magnitude to the electron beam current. A second detector monitors a high voltage transformer that produces a potential for operating on the electron beam and the second detector produces a second voltage that is proportional in magnitude to the high voltage potential. A monitoring circuit constantly monitors both the first and second voltages and produces a trigger signal whenever the additive sum of the first and second voltages exceeds a selected magnitude. In this manner, a trigger signal indicates an excessively high combination of electron beam current and high voltage. This circuit is constantly responsive to both high voltage and electron beam current.

Abstract: An improved aging process for a cathode ray tube in which the main focusing grid (G3) is aged at a potential below that of the G2 grid, resulting in significantly reduced incidence of dark center cathode.

Abstract: A conventional peaking signal derived by delaying the incoming video or luminance signal first by one horizontal line delay and then by a second horizontal line delay is modified by multiplication with an adaptive factor. The adaptive factor is derived by first taking the difference between the incoming signal and the twice delayed signal, then deriving the magnitude or the square of this difference and multiplying this by a factor K empirically derived for the particular display device. The resultant signal is then subtracted from unity. This yields the factor by which the conventional peaking signal is multiplied. The conventional signal multiplied by this factor constitutes the final peaking signal which is added to the 1H delayed luminance signal to yield the desired peaked luminance signal.

Abstract: The disclosed circuit determines whether a video signal is from a video tape player or a broadcast signal source by measuring jitter of the vertical synchronization pulses. In one embodiment, every other time interval between the vertical synchronization pulses is measured and saved as a count, and each count is compared to the preceding count to determine whether sufficient jitter is present to indicate that the video signal is from a local tape player. In another embodiment all intervals between the vertical synchronization pulses are measured and a predetermined number thereof are saved as counts. The even and odd counts are then analyzed separately, and the extreme count (the most deviant count) of each group is eliminated.

Abstract: An interface circuit for translating digital signals signifying colors in any of various color formats into analog signals for controlling respective primary colors of a display monitor operating in a standard R, G, B primary color format. The circuit adds a control bit to each digital signal identifying the color format of the signal, and each of the colors signified by respective digital signals are identified by digital words corresponding thereto stored in a digital memory. The bits of each stored word control respective levels of analog signal attenuation in analog summing networks for converting each of such words into respective R, G, B analog signals for the video monitor. Changing the value of the control bit changes the word read-out from the memory in accordance with the particular color format of the received digital signals.

Abstract: LCD color television front projection screen has a rear vertically oriented lenticular lens array, the sidewalls of the lenticules steeply inclined to achieve total internal reflection of rays from a projected image into tip regions of the lenticules, an external reflective surface behind the array for reflecting the projected rays back into an audience field in front of the screen, and black masking between the lenticules for absorbing ambient rays.

Abstract: The effective aperture sizes of the final focusing and accelerating electrodes of an in-line electron gun structure for color cathode ray tubes are increased by elongating the apertures, expanding the outer edges of the side apertures, and surrounding the apertures with a peripheral raised rim which balances the asymmetry introduced into the apertures by enlargement. Partitions between the aperture may be radiused so their center height is lower than the height at the edges. The raised rim of the final accelerating electrode is generally higher than the raised rim of the focusing electrode.

Abstract: The edges of an incoming video signal are sharpened by switching the output furnishing the sharpened signal in sequence first to receive a signal delayed by a greater amount, i.e. a signal which has not as yet undergone transition, and, secondly, to receive a signal delayed by a lesser amount, i.e. one that has already completed the transition. The rise time of the affected edge thus depends only on the time required to switch from one terminal to the next. The same switching sequence is carried out regardless of whether the transition is a negative going or positive going transition.

Abstract: Internal magnetic shield for color television picture tube has a pair of slot-shaped openings, facing each other above and below the Z axis, and an oblong-shaped aperture surrounding the Z axis, having a length-to-width ratio of about 1.7 to 2.1.

Abstract: An interpolated line is created between the horizontal lines of each field of an interlaced television signal on a pixel-by-pixel basis. For each pixel to be interpolated, the pixel in the same field located immediately above and below the interpolated pixel are compared. If the difference between the two values exceeds a predetermined difference, the larger or the smaller pixel value is picked for the interpolated pixel, depending upon the value of the corresponding pixel in the immediately previous field. If the difference between the two pixel values is smaller than the reference value, either of the two values or an average of the two values may be used as the interpolated pixel value.

Abstract: An improved getter assembly for use in cathode ray tubes, and particularly in cathode ray tubes that require a clear area or window, the getter assembly including a container with getter diffusion directing tabs extending from the sidewall of the container in a direction away from the window area.

Abstract: A liquid-tight seal is achieved in a two-part transformer casing by use of a U-shaped channel in the main body of the casing, the U-shaped channel being formed on one side by a rigid joint member and, on the other side, by a flexible member. Both members are molded in a single unit with the main casing, but the flexible member has a decreased cross-section relative to that of the rigid member. The cover for the casing has a lip extending into the U-shaped channel. The lip is wegge-shaped, having a minimum cross-sectional area at its furthest projection into the U. At its other extremity, the cross-sectional height of the lip slightly exceeds the perpendicular distance between the flexible and rigid members. A rectangular cross-sectional part of the lip immediately adjacent to the cover provides a contact surface for the flexible member, while the rigid member makes contact with the wedge-shaped portion over a greater area.

Abstract: Color television rear projection screen having a front vertically oriented lenticular lens array, a circular Fresnel lens component with an infinite second conjugate, and a horizontally oriented linear Fresnel lens component with a finite second conjugate, the screen having improved luminance uniformity.

Abstract: CRT mounts for color television are effectively high voltage conditioned by impressing a high voltage DC potential on the mount anode, while at the same time impressing a high frequency pulsed AC potential on the final grid electrode, and allowing the focusing electrode to float electrically, thereby inducing arcing in the upper and lower gaps adjacent the focusing electrode. Preferably, this general conditioning is followed by a second conditioning step in which the focusing electrode is connected to the AC potential, to concentrate the arcing in the upper gap.

Abstract: Cathode ray tubes with optical windows in the sidewall or funnel portion thereof are provided with transparent conductive films of metal oxide on the inner surface of the funnel in the window area. Such films provide electrical continuity with the internal conductive coating of the tube, while permitting optical viewing. The films are produced by in-situ pyrolysis of films of metal resiantes in organic solvents.