Abstract: The emergency stop switch 2 performs an operation support of an operation switch, and not only improves operability and safety but also simplifies the structure to enhance reliability. The emergency stop switch (or operation switch unit) 2 with an operation support function includes an emergency stop button (or operation switch) 21 for switching the state of the contact, a reception part (or detection part) 32 for detecting a remote operation of the emergency stop button 21 and an electromagnetic solenoid (or actuating part) 3 that is disposed between the contact and the emergency stop button 21 and that actuates the emergency stop button 21 on the basis of the remote operation received (or detected) by the reception part 32. The emergency stop button 21 is located on one end side of the emergency stop switch 2 and the contact is located on the other end side of the emergency stop switch 2.

Abstract: The emergency stop switch 2 performs an operation support of an operation switch, and not only improves operability and safety but also simplifies the structure to enhance reliability. The emergency stop switch (or operation switch unit) 2 with an operation support function includes an emergency stop button (or operation switch) 21 for switching the state of the contact, a reception part (or detection part) 32 for detecting a remote operation of the emergency stop button 21 and an electromagnetic solenoid (or actuating part) 3 that is disposed between the contact and the emergency stop button 21 and that actuates the emergency stop button 21 on the basis of the remote operation received (or detected) by the reception part 32. The emergency stop button 21 is located on one end side of the emergency stop switch 2 and the contact is located on the other end side of the emergency stop switch 2.

Abstract: A push button switch 1 is so constructed as to disengage the movable contacts 55b, 56b from the fixed contacts 55a, 56a through operation of the push button 2 held in the switch case 3. A first leaf spring 550 is provided in the switch case 3 to act as an opening-biasing means to bias the movable contacts 55b, 56b away from the fixed contacts 55a, 56a. The movable contact 55b is disposed at an end of the first leaf spring 550 and adapted to engage with and disengage from the fixed contact 55a. The first leaf spring 550 is adapted to be at a position where the movable contact 55b is open relative to and disengaged from the fixed contact 55a at zero displacement of the first leaf spring 550.

Abstract: A push button switch 1 is so constructed as to disengage the movable contacts 55b, 56b from the fixed contacts 55a, 56a through operation of the push button 2 held in the switch case 3. A first leaf spring 550 is provided in the switch case 3 to act as an opening-biasing means to bias the movable contacts 55b, 56b away from the fixed contacts 55a, 56a. The movable contact 55b is disposed at an end of the first leaf spring 550 and adapted to engage with and disengage from the fixed contact 55a. The first leaf spring 550 is adapted to be at a position where the movable contact 55b is open relative to and disengaged from the fixed contact 55a at zero displacement of the first leaf spring 550.

Abstract: A projection type video display apparatus includes a projection lamp and a video signal processing circuit which performs video processing to an input video signal. The projection type video display apparatus includes means for performing an initializing process of the video signal processing circuit in a period until brightness of the projection lamp reaches brightness enough to project video since the projection lamp is lit and in a period except for a period during which lamp lighting noise is generated immediately after the projection lamp is lit.

Abstract: A display device comprises horizontal video end position detection means for detecting a horizontal video end position of video data on the basis of a second threshold value and threshold value control means for controlling the second threshold value depending on the level of video data outputted from an analog-to-digital converter.

Abstract: A projection type video display apparatus includes a projection lamp and a video signal processing circuit which performs video processing to an input video signal. The projection type video display apparatus includes means for performing an initializing process of the video signal processing circuit in a period until brightness of the projection lamp reaches brightness enough to project video since the projection lamp is lit and in a period except for a period during which lamp lighting noise is generated immediately after the projection lamp is lit.

Abstract: Disclosed is a projection type video display apparatus comprising input means for inputting a power saving mode setting command, average luminance level detection means for detecting the average luminance level of an input video signal, PWM generation means for usually generating a first PWM signal having a duty ratio corresponding to the average luminance level detected by the average luminance level detection means in a predetermined duty ratio range, while generating, when the power saving mode setting command is inputted by the input means, a second PWM signal having a duty ratio outside the predetermined duty ratio range, and lamp control means receiving the PWM signals generated by the PWM generation means for controlling the illuminance of the light source lamp on the basis of the duty ratio of the inputted PWM signal.

Abstract: Disclosed is a projection type video display apparatus comprising input means for inputting a power saving mode setting command, average luminance level detection means for detecting the average luminance level of an input video signal, PWM generation means for usually generating a first PWM signal having a duty ratio corresponding to the average luminance level detected by the average luminance level detection means in a predetermined duty ratio range, while generating, when the power saving mode setting command is inputted by the input means, a second PWM signal having a duty ratio outside the predetermined duty ratio range, and lamp control means receiving the PWM signals generated by the PWM generation means for controlling the illuminance of the light source lamp on the basis of the duty ratio of the inputted PWM signal.

Abstract: A display device including a clock generation circuit for generating sampling clocks, whose frequency is variable, on the basis of a horizontal synchronizing signal of an input image signal; an analog-to-digital converter for sampling the input image signal on the basis of the sampling clocks generated from the clock generation circuit; calculation device for calculating the number of sampling clocks outputted from a horizontal image start position to a horizontal image end position in image data outputted from the analog-to-digital converter, comparison device for comparing the number of sampling clocks calculated by the calculation means with a previously set value, and a controller for controlling the frequency of the sampling clocks outputted from the clock generation circuit on the basis of the results of the comparison in the comparison means.

Abstract: A display device comprises horizontal video end position detection means for detecting a horizontal video end position of video data on the basis of a second threshold value and threshold value control means for controlling the second threshold value depending on the level of video data outputted from an analog-to-digital converter.

Abstract: A video signal reproducing apparatus, such as a video disc player, equipped with a field memory for special reproduction such as still-picture reproduction. The video signal writing-reading period for the field memory is set to a value which is the color subcarrier period multiplied by an integer, is also the horizontal synchronizing period multiplied by an integer and is further approximate to one field period to the greatest possible extent, to thereby eliminate the discontinuity of video signals due to the track jumping action of the pickup.

Abstract: A short-arc discharge lamp includes a combination of electrodes arranged in an opposing relation in a discharge space surrounded by silica glass. An expansion and contraction member made of a shape-memory alloy, which contracts at high temperatures, is fixed on one of the electrodes. A lighting start-up discharge terminal is formed at a free end of the expansion and contraction member. A free end of the lighting start-up discharge terminal is in contact with the other electrode at room temperature but is separated from the other electrode at high temperatures.

Abstract: A flash discharge lamp in which a tubular glass bulb is sealed at both ends by a cathode metal cap and an anode metal cap, respectively; a cathode material member is mounted on the top of an intermediate member planted on the bottom of the cathode metal cap; an adhesive is tamped in the gap between each of the metal caps and the outer peripheral surface of the tubular glass bulb; and a discharge is produced between the anode metal cap and the cathode material member.