Abstract: When a decision is made that receiving performance deterioration due to an interfering wave is present in a digital broadcasting wave, an operating point of an RF AGC amplifier 6 and a time constant of gain control of the RF AGC amplifier 6 are altered.

Abstract: A radio-frequency identification tag communication device including a BFA weight-value setting portion operable to control a directivity of a transmitter antenna, and an adaptive processing portion operable to implement an adaptive control of a weight to be given to a received signal received by each of a plurality of antenna elements, on the basis of a reply signal transmitted from a radio-frequency identification tag, so that the directivity of the transmitter antenna is changed to a direction in which the frequency identification tag in question is expected to exist, and the weight to be given to each received signal is subjected to the adaptive control, whereby the sensitivity of communication of the communication device with the radio-frequency identification tag is improved.

Abstract: A paper cartridge for a detachable printer unit of a camera, the camera including a casing having an elongate socket that is open at one end and closed at the other end; a first industry standard interface located at the closed end of the socket; a printer unit including a printhead, the printer unit being received within the socket, the printer unit having a second interface compatible with the first interface, whereby the printer unit is detachably engaged with the casing by inserting the unit into the socket to engage the first and second interfaces together; the paper cartridge being configured for holding a plurality of individual pages, wherein, when the printer unit is engaged in the socket, substantially the entire paper cartridge is located within the socket.

Abstract: The present X-ray protector requires no raising of a voltage to be impressed to a cathode ray tube (CRT) and no complicated control procedure for testing the X-ray protector's operation. The voltage applied to the CRT is detected by a detection winding of a flyback transformer and a detection circuit. An input line, which includes a resistor inputs a signal based on the detected voltage to a microcomputer. The microcomputer controls whether a transistor is conductive or unconductive. An emitter of the transistor is connected to one terminal of the resistor, and a collector is connected to the other terminal of the resistor. When the transistor is conductive both ends of the resistor are short-circuited causing the electric voltage of a signal input to the microcomputer to be raised, thereby enabling testing of the X-ray protector without the need to apply a higher than normal voltage to the CRT.

Abstract: An apparatus and a method for protecting a video display device, having an anode and a cathode, against excessive beam current conditions. In particular, the present invention protects the video display device against zero-biasing of the device, wherein the cathode driver circuit is supplied by a plurality of power supplies and the loss of anyone of the power supplies causes zero-biasing of the cathode.

Abstract: A method and system for implementing a screen saver function is described. A peak value of a characteristic such as beam current magnitude of a video signal being processed is determined. An average value of the same characteristic of the video signal is also determined. Changes in this average value is additionally monitored. Therefore, the characteristic of the video signal is adjusted only if the peak value exceeds a first threshold and a change less than a second threshold is detected in the average value.

Abstract: An x-ray protection circuit for a video processor, to disable a horizontal output pulse when a voltage level on the x-ray input exceeds a reference voltage. The x-ray protection circuit comprises a comparator and a bistable device, and incorporates a reset circuit. The reset circuit enables the initialisation of the protection circuit whilst the power is switched on.

Abstract: A method and a device for power management regarding an integrated display unit including a video display and at least one peripheral device, wherein the video display uses horizontal and vertical sync signals for the synchronization of the display images, and the peripheral device uses a peripheral signal to carry out its function. The peripheral device can be an audio unit using audio signals to produce sound. The peripheral device can be a USB connector using a +5 V voltage to indicate a connection being made to the integrated display unit. In the integrated display unit, a single power supply is used to provide electrical power to the video display and the peripheral device. In order to reduce the power consumption by the integrated display unit, a number of power consumption states, based on the presence of the video sync signals and the peripheral signals, are implemented. The presence of the video sync signals can be detected by a micro-controller in the integrated display unit.

Abstract: A cathode ray tube protection system for protecting a cathode ray tube from maintenance of high voltage residual occurring when power is turned on or off or due to abnormal operation in a projection-type television is provided.

Abstract: A CRT display device includes an on-screen display circuit for producing a display signal displayed on-screen on a CRT and superposing said produced display signal on a video signal; a brightness restraining circuit for suppressing the brightness of CRT in a range below an upper limit value based on an anode current of CRT; and a controller for controlling the operation of the on-screen display circuit and the operation of the brightness restraining circuit, and controlling a power supply to turn on or off; wherein when a display signal having a great area ratio of higher brightness portion is a discharging display signal, said controller controls said on-screen display circuit to produce the discharging display signal, upon an instruction for turning off the power supply, and controls the power supply to turn off when the operation of the brightness restraining circuit to suppress the brightness is relieved or stopped.

Abstract: A hardware-implemented screen-saver prevents burn-in of an image displayed on a screen of a display product by automatically reducing the video gain, and therefore the contrast, of the image when the portion of the image within a two-dimensional detection window has changed by less than a predetermined amount for a predetermined period of time. A lack of change of the incoming video signal of the image is detected and used to invoke a reduction in contrast of the image displayed on the display product. This allows the image to remain visible, yet reduces the possibility of burn-in of the image in the screen of the display product.

Abstract: Supplementary grid blanking and spot burn protection are provided in a receiver/monitor (10) by a grid bias control circuit (50) including a blanking signal generator (60) that produces a blanking output signal (S1) devoid of any picture representative component whenever a vertical blanking signal (VB) or a horizontal blanking signal (HB) is present. A capacitor (C1) strips DC from the blanking signal and the resultant signal (S2) is applied to a modulation input (84) of a grid bias generator to produce an output grid bias reference voltage (Vr) modulated by the AC component of the blanking signal. The reference voltage (Vr) is coupled via a spot burn protection circuit (100) and a grid coupling circuit (120) to the control grids of three projection kinescopes (16, 18, 20).

Abstract: A monitor protection system comprise a display power management signaling (DPMS) operating unit for performing a predetermined power control; a horizontal deflection detecting circuit for detecting a horizontal deflection signal from a horizontal deflection circuit; a vertical deflection detecting circuit for detecting a vertical deflection signal from a vertical deflection circuit; and a control circuit for determining whether the horizontal deflection signal and the vertical deflection signal are normal, and generating a predetermine control signal to run the DPMS operating unit in order to observe the conditions of horizontal/vertical synchronization signals continuously, and protect a CRT monitor independently from the horizontal/vertical synchronization input conditions.

Abstract: A CRT protective circuit capable of eliminating spots during a mode conversion operation includes a microprocessor for generating a mute signal according to externally-provided horizontal and vertical sync signals, and a high voltage generating section for generating a high voltage according to an operation of a flyback transformer. A first switching section is switched according to the mute signal for supplying the high voltage of the high voltage generating section to a grid terminal, and a high voltage dropping section divides the output voltage of the high voltage generating section according to the switching status of the first switching section and supplies the dividing voltage to the grid terminal to control brightness of the spots.

Abstract: A display system includes a kinescope. A horizontal scan detector is coupled to a source of a horizontal scan current signal and detects a loss of horizontal scanning. In addition, a vertical scan detector is coupled to a source of a vertical scan current signal including a feedback path and detects a loss of vertical scanning. A vertical feedback detector is also coupled to the vertical scan current signal source, and detects a failure of the feedback path in the vertical scan current signal source. A controllable kinescope driver circuit, coupled to the kinescope, the horizontal scan detector, the vertical scan detector and the vertical feedback detector, blanks the kinescope if the horizontal scan detector detects a loss of horizontal scanning, the vertical scan detector detects a loss of vertical scanning or the vertical feedback detector detects a failure of the feedback path.

Abstract: An improved spot elimination circuit for a monitor capable of Display Power Management Signaling function prevents an occurrence of a focused beam spot from the phosphor screen of a cathode ray tube in the monitor by suddenly dropping the potential level of a high voltage. The circuit includes a high voltage generator, a X-ray sensor, a X-ray protector, a controller and a spot killer circuit. The spot killer circuit actuates the X-ray protector to virtually instantaneously shut down a high voltage generated from the high voltage generator in response to a logic signal indicative of absence of a vertical synchronizing signal. The controller determines the vertical sync signal and generates the logic signal. Accordingly, the phosphor screen of the cathode ray tube is protected from excessive cathode luminance at a focused spot which can cause degradation of the screen.

Abstract: In a high voltage discharge circuit for a CRT, a power-off detecting circuit detects turning off of a power switch and outputs a power-off detection signal, to activate a luminance increasing section to increase the luminance of a video signal being outputted to the CRT at the time the power switch is turned off. Therefore, the high-voltage charges that remain applied between the anode and the cathode of the CRT after the power switch has been turned off discharge rapidly so that occurrence of afterglow can be reliably prevented.

Abstract: A display unit comprises a video amplifying circuit for amplifying a video signal and outputting the amplified video signal to a cathode-ray tube, a sync separation circuit, a deflection circuit, a high-voltage circuit, a synchronizing signal control circuit for judging whether a synchronizing signal outputted from the sync separation circuit is present and outputting a signal indicative of the presence or absence of the synchronizing signal therefrom and having a synchronizing signal control switch for permitting the supply of an output indicative of the absence of the synchronizing signal at all times as needed, a power source control circuit for opening and closing a power source circuit in response to the output of the synchronizing signal control circuit and a power switch electrically connected to a power terminal.

Abstract: For preserving and, thus, for extending the useful life of a picture tube of a picture tube screen device having a waiting state function. The filament current of the picture tube in the waiting state of the picture tube screen device is reduced by at least a slight percentage of an original filament current. Also, the picture tube is supplied with another video signal, in addition to an original video signal, that generates a beam current in the picture tube having a white image level that is at least a slight percentage of an original white image level generated by the original video signal.

Abstract: A television receiver includes a standby power supply, and an operational or run mode power supply. A microprocessor coupled to the standby power supply controls switching between a run mode, where the standby and run mode power supplies are operative, and a standby mode where only the standby supply is operative. The switching is normally made in response to switch inputs or in response to a signal from a remote controller. The microprocessor is in digital communication with a digital circuit, such as a phase locking tuner, over a bidirectional data bus. The microprocessor is programmed to poll the digital circuit periodically and to monitor the data on the data bus for an expected response to a poll. When the digital circuit fails to respond to the poll, or responds inappropriately, as may occur with lack of adequate power to the digital circuit from the run power supply, the microprocessor automatically switches into the standby mode and disables the run supply.