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    • 33. 发明专利
    • AUTOMATIC SWITCH CIRCUIT OF LENS IRIS
    • JPS5499517A
    • 1979-08-06
    • JP580378
    • 1978-01-24
    • HITACHI ELECTRONICS
    • UKIGAYA FUMIOOOOKA MASAHARU
    • H04N5/238
    • PURPOSE:To simplify the handling of the TV camera as well as to increase the life time of the pickup tube by securing an automatic ON/OFF of the lens iris in response to the ON/OFF of the camera power source with addition of a simple circuit. CONSTITUTION:With ON of camera power source P2 at time t1, the gate voltage of FETQ1 lowers down to the voltage determined by constant voltage element CV due to generation of bias voltage V2 and V3. And then Q1 is turned off. Thus, the charging charge of cpacitor C is discharged via low resistor R3 for memory time setting and then lowers down to voltage V3. As a result, the source voltage of FETQ2 becomes almost equal to voltage V3 and then to lens iris switch setting reference voltage Va at t2 after the time according to the time constant which is determined by resistor R2 and C. At this instant, lens iris control circuit IC opens the lens iris to perform the switch control of the lens iris in response to the level of video signal S and in accordance to the drop of voltage VO after t2.
    • 37. 发明专利
    • DISPLAY METHOD FOR VIDEO SIGNAL LEVEL
    • JPS5486225A
    • 1979-07-09
    • JP15299077
    • 1977-12-21
    • HITACHI ELECTRONICS
    • YOSHIMURA YASUOUKIGAYA FUMIO
    • H04N5/445H04N17/00H04N17/04
    • PURPOSE:To make the display of a video signal level correspond to a video signal clearly by screen-displaying a signal, equivalent to a video signal part at a voltage level set freely in a horizontal synchronizing period overlapping with the video signal. CONSTITUTION:Horizontal synchronizing signal H indicated by (a) is inputted to terminal 1, and video signal 2a indicated by (c) is to terminal 2. Signal H is inputted to FF3 and pulse 3a shown by (b) is outputted to NAND gate 4. Signal 2a is supplied to comparator 5 and compared with reference voltage Vr and signal 5a exceeding Vr shown by (d) is outputted to gate 4. Gate 4 outputs signal 4a shown by (e) to adder 6 together with signal 2a. Adder 6 adds signals 2a and 4a together and outputs signal 6a shown by (f). At the time when a picture of signal 6a is formed on the video monitor, black scanning lines are interlaced in the part exceeding voltage Vr in an odd-numbered or even-numbered field and striped display is done , so that signal 2a whose level is higher than voltage Vr can be discriminated definitely.
    • 39. 发明专利
    • DEVICE FOR GUIDING PACKAGING OF INSERTED PARTS USING ELECTRONIC COMPUTER
    • JPH0267798A
    • 1990-03-07
    • JP21834388
    • 1988-09-02
    • HITACHI ELECTRONICS
    • UKIGAYA FUMIO
    • H05K13/00H05K13/08
    • PURPOSE:To efficiently execute the packaging works of various printed circuit boards using at least one set each of electronic computer, image display device, and storage device respectively by realizing a function which guides a worker by displaying the parameter information of parts by one pierce or a plurality of pieces on the image display device in accordance with arbitrarily set inserting order. CONSTITUTION:Parts are called and displayed on an image display device 4 in the inserting order by means of an operating device 1 or data calling foot-switch 6. A printed circuit board 15 is displayed on a video screen 8 and the parts number, code, and specifications of the parts to be inserted this time are displayed in sections 11, 12, and 13 in the upper section of the screen 8. The longitudinal and transversal directions of the circuit board are respectively displayed in sections 9 and 7. The location of the parts to be inserted this time on the circuit board 15 is indicated on the screen 8 and the worker inserts the parts designated by the parts number displaying section 11, code displaying section 12, and specification displaying section 13 into the location of a parts location designating mark 14 on the circuit board 14 while the worker watches the display. When the worker inputs parts through the operating device 1 or foot-switch 6 at every parts, a list of uninserted parts is displayed on the picture display device 4 when all works are completed.