Abstract:
PURPOSE:To easily edit by providing a means which prints a character signal corresponded with a time code at the prescribed area out of the projection scope of a film in a kine recorder which prepares a projection film from a video signal. CONSTITUTION:Time codes that represents an hour, a minute, a second and number of frames are generated from a VTR1. These time codes are supplied to a character generator 6 and are converted to character signals. To the character generator 6, a synchronizing signal from a film picture recording device 5 is supplied. The output of the character generator 6 is outputted in the blank period that one frame of the video signal is started. The character signal is supplied to an adder circuit and is overlapped on the video signal outputted through a switching circuit 3. Therefore, on a prepared film 7, a time code 8 is recorded at the prescribed position out of the projection scope between a projection area 20 printed by the B signal of a previous frame and a projection area 9 printed by the R signal of an existing frame.
Abstract:
PURPOSE:To set easily an optional waveform with simple constitution by adding the 1st 3rd reference voltages with weighting. CONSTITUTION:An operational amplifier A1 amplifies a voltage difference between the 2nd reference voltage V1 and the 1st and 3rd reference voltages W (V0, V2) subject to weighting and the result is fed to each voltage dividing point of a voltage divider D1 via distribution resistors R1h-R1j. Thus, the voltage of each voltage dividing point of the voltage divider D1 changes from the state that it is distributed at an equal interval (linearly) between the 1st and 2nd reference voltages V0 and V1 to the state that it is distributed at an unequal interval (nonlinearly) by addition with weighting. A nonlinear waveform by a step wave approximation appears at an output terminal OUT as shown in solid lines through the sequential closing of step switches St-S14. A linear step wave shown in broken lines in the figure is obtained by making the distribution resistors R1hR1j infinite.
Abstract:
PROBLEM TO BE SOLVED: To provide a laser plate making apparatus having a small size and a simple circuit configuration by preventing generation of moire. SOLUTION: The laser plate making apparatus comprises supply means 6, 7, 8, 9 for supplying image data signals (a), generating means 3, 4 for generating noise waveform signals (n), and modulating means 2 for pulse-width modulating the signals (a) from the means 6, 7, 8, 9 according to the signals (n) from the means 3, 4. A laser diode 10 is driven by a PWM signal for generating pulses at random obtained according to the pulse-width modulation to make a printing plate.
Abstract:
PROBLEM TO BE SOLVED: To allow focus function to continuously and smoothly function at the time of plate processing by applying focus servo on the basis of focus error quantity during a first period within one rotary period of a plate cylinder and applying focus servo on the basis of a preliminarily detected lens position during a second period. SOLUTION: The focus of a lens means is adjusted corresponding to focus error quantity during the first period within one rotation of a plate cylinder 1. That is, on the basis of the calculated focus error quantity, a lens position driving circuit 20 energizes a moving coil 71 corresponding to a lens position moving signal to adjust the lens position of an object lens 52 to a just focus position. This is the focus servo system of the object lens. Subsequently, the focus of the lens means is adjusted corresponding to the lens position detected by a lens position detection means during the second period within one rotation of the plate cylinder 1. By this constitution, focus servo functions continuously over the period of one rotation of the plate cylinder 1.
Abstract:
PROBLEM TO BE SOLVED: To provide a printing plate engraving driver which makes it possible to linearly provide the output characteristics of a laser beam to the laser drive current of a laser diode. SOLUTION: The printing plate engraving laser driver comprises an anamorphic prism 12 for demultiplexing a laser beam on the optical path of the beam guided by an optical lens, a photodiode 14 for detecting the quantity of the beam demultiplexed by the prism 12 to output a predetermined signal, and a comparator 2 for comparing the signal level output from the photodiode 14 with the level of printing plate engraving data. The signal level output from the photodiode 14 is always compared with the level of the engraving data to control the laser drive signal.
Abstract:
PURPOSE:To eliminate the troublesome operations such as setting the size and direction of a printing paper and others by providing a control means for controlling a feeding means and a printing means based on the sensed information and printing the information on a sheet to be printed. CONSTITUTION:The frequency of an address signal generated by an oscillator and an address counter 7 is changed by a CPU 4 based on the length and breadth information from a length and breadth sensing circuit 1, the breadth information from a breadth sensing circuit 2 and the direction information (length or breadth) from a comparison circuit 3 to control a motor 8 and change the reference voltage of a D-A converter 9. The image information and other informations to be printed are stored in the memories 8 by a write address signal from an oscillator and the address counter 7. Then the information is read out by a control signal from the CPU 4. In other words, the length and breadth at the time of reading out the information from the memories 8 are controlled by changing the address signal from the oscillator and the address counter 7.
Abstract:
PURPOSE:To provide a good reproducibility of the density gradation of a fine level even though adjustment is not performed in applying it in the laser printer, for example, and to prevent the picture gradation between printed pictures prepared when printing on plural sheets of paper are performed from being dispersed by lowering the clamp level to be formed to a picture signal near the lower limit level of the picture signal, comparing the clamp level with the clamp level of a detection signal detected by a photodiode, and controlling the laser driver based on the comparison. CONSTITUTION:A laser diode 2 outputting the laser beam, laser driver 1 driving the diode 2, photodetector 3 detecting the outputted laser beam, amplifier circuit 4, sample-and-hold circuit 5, non-signal level addition circuit 11 forming a non- signal level part for a synchronizing signal, synchronizing signal addition circuit 13 adding the synchronizing signal, and clamp circuit 6 controlling the laser driver 1 based on the output and the detection signal from the sample-and-hold circuit 5.
Abstract:
PURPOSE:To obtain gradation on a recording picture, to obtain a high resolution picture and to improve the transfer property and durability by preliminarily forming a picture with a solidified developer and transferring it on a recording paper by a press contact transfer. CONSTITUTION:An electrostatic latent image is formed on a substrate 1 and the electrostatic latent image is developed by using the solidified developer dispersed with colorant particles into a dispersion medium which reversibly repeats melting and solidification to disperse the colorant particles into the dispersion medium which is a solid at normal temperature and reversivly repeats melting by heating over the m.p. and solidification by cooling, and then on the substrate 1 surface a developer image 4 consisting of colorant particles and the dispersion medium is formed. Then, the substrate 1 and a transferred body 5 are heated under pressurized contact and the heating temperature under press-contact is made more than the m.p. of the dispersion medium and the dispersion medium is melted and is cooled to the temperature lower than the m.p. and the transferred body 1 is peeled. Then the developer image 4 on the substrate 1 surface is transferred to the body to be transferred 5 to record the picture. Thus the gradation is obtained and the resolution is also kept.
Abstract:
PURPOSE:To detect a tape traveling speed with high accuracy by detecting the tape traveling speed based on a horizontal synchronizing signal. CONSTITUTION:The traveling speed of a magnetic tape is detected based on an output signal SV of a sample-and-hold circuit 26 by stop-controlling the sampling and holding operation of the sample-and-hold circuit 26 during a period in which the signal level of a reproducing signal SPB falls into a prescribed signal level or lower based on a detected result SBP of a signal level detecting circuit 20. Namely, a sawtooth wave signal Sr, the signal level of which changes in a prescribed inclination synchronously with a horizontal synchronizing signal SH, is sampled and held in timing synchronizing with the horizontal synchronizing signal SH. Thus, the tape traveling speed can be detected with high accuracy in the cycle of the horizontal synchronizing signal SH.
Abstract:
PURPOSE: To record gradation of a picture correctly by making gamma- correction beforehand every time when using, and keeping the maximum value and minimum value of beam current constant during recording operation, and thereby removing variation of intermediate value of beam current due to temperature change in initial stage of operation. CONSTITUTION: A change-over switch 18 is made to the state of switching as shown in the figure, and reference staircase wave voltage SR is supplied from a staircase wave generator 19 to a gamma correcting circuit 17. When input/output characteristic of the gamma correcting circuit 17 is set to conform with input/output characteristic of an EBR 1, the change-over switch 18 is set to the state reverse to that shown in the figure, and video signals from an input terminal 10 are supplied to the grid 3 of the electron beam picture recording device EBR 1, and recorded in a film F making electron beam Br a stylus. In this case, the maximum value and minimum value of beam current are kept constant, and intermediate value is regulated by set input/output characteristic of the gamma correcting circuit 17. Therefore, it is not influenced by temperature change of the EBR 1 in initial stage of operation. COPYRIGHT: (C)1986,JPO&Japio