CN2049370U

CN2049370U - Automatic staggered frame setting apparatus for cine-projector

Info

Publication number: CN2049370U
Application number: CN 89209027
Authority: CN
Inventors: 张玉申
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-06-24
Filing date: 1989-06-24
Publication date: 1989-12-13

Abstract

The utility model discloses an automatic adjusting staggered frame setting apparatus for a cine-projector which is used in the process of cine projection, comprising a photoelectric detection circuit, a staggered setting detecting circuit, a controlling and adjusting circuit and an executing adjusting circuit. The utility model has the advantages of reasonable design, low cost, high reliability and high sensitivity. The cine-projector uses the automatic adjusting staggered frame setting apparatus, not only the projectionist's labor strength can be relieved, but also the staggered setting of the film can quickly be automatically adjusted. Namely, when the staggered setting projecting effect does not occur on the screen, the utility model can automatically find and adjust in time to realize the projecting effect with high quality.

Description

Automatic staggered frame setting apparatus for cine-projector

The utility model belongs to electronic installation, is exclusively used in projector is controlled the movie pictures position automatically in the projection process device.

Film projector in the projection process because last slice, contact pin is incorrect, film anacoluthon phenomenon can appear in machinery reason such as skid, and makes view picture picture in the screen be divided into two or imperfect.The way that solves is that " framing device " corrects anacoluthon on the manual shift projector at present, and the major defect of this manual shift is: 1. the projectionist will observe the picture in the screen at any time, and energy concentrates labour intensity big; 2. observe screen with projectionist's eyes and get muddled and find anacoluthon, discovery time evening, it is long to regulate the used time of anacoluthon, can not guarantee high-quality projection; 3. the skill level that inspection sheet personnel's contact pin technology and projectionist regulated anacoluthon is had relatively high expectations.

The purpose of this utility model is exactly in order to solve the deficiency that the manual shift anacoluthon exists, design and to find anacoluthon fast, automatically regulate anacoluthon, just can in time not find automatically and adjust when promptly occurring the effect of anacoluthon projection in the screen, realize high-quality projecting device.

Instructions of the present utility model has three accompanying drawings, and Fig. 1 is the circuit block diagram of this device; Fig. 2, Fig. 3 are this manipulated or operated apparatus, and the AA ' among Fig. 2 is connected with the A.A ' of Fig. 3 respectively.

Realization of the present utility model such as Fig. 1, Fig. 2, shown in Figure 3.Be by photoelectric detective circuit, anacoluthon detecting circuit, control are adjusted circuit and are carried out and adjust circuit four parts composition.The output of photoelectric detective circuit links to each other with the input of anacoluthon detecting circuit.The output of anacoluthon detecting circuit is connected the input end that circuit is adjusted in control, control is adjusted the output control of circuit and is carried out the input end of adjusting circuit, the output control that circuit is adjusted in control carry out the input end of adjusting circuit carry out on the output O control projector of adjusting circuit framing device and and the input end of control adjustment circuit link to each other.Photoelectric detective circuit is made up of infrared transmitting tube D1, phototriode T1, bipolarity output T2 and gauge tap K1 etc.The anacoluthon detecting circuit is made up of multistage RC integrating circuit, integrated transporting discharging IC, triode switch T3, T4 and the differentiating circuit that utilizes diode switch D9, D4 internal resistance and capacitor C 1 to form.Control is adjusted circuit and is made up of multistable trigger circuit T5 T6 T7 T8 unijunction transistor multivibrator T13 and differential amplifier circuit T9 T10.Carrying out the adjustment circuit is made up of npn complex pipe T11, pnp complex pipe T12 and DC servo motor SD.When normal projection, with per second, during the operation of the speed of 24 lattice, manage and divide two tunnel outputs, exports from emitter when putting black square line film by the pulse signal when showing by T2 output is normal, T2 between infrared transmitting tube D1 and phototriode T1 for film.Export from collector when putting white frame bar film, by K1 control, the width of exporting when the pulse width of photoelectric detective circuit output is than anacoluthon during because of normal projection is narrow 3.9 times, and the interval of pulse during than anacoluthon the interval wide 15.6 times.The pulse in so normal when projection just is subjected to the decay of multistage RC integrating circuit when being added to the anacoluthon detecting circuit, make integrating circuit be output as zero, and the output of integrated transporting discharging IC also is zero, not conducting of stabilivolt D3.T3 ends, the T4 conducting.The differentiating circuit of being made up of D9 D4 and electric capacity is output as zero.The A point is unsettled, so the trigger end of multistable trigger circuit is unsettled, at this moment T5 ends, the equal conducting of T6 T7 T8.Then the collector of T5 is output as noble potential, and charges to C3 by resistance, because of T6 T7 T8 conducting, with the differential base earth of T9 T10 two pipes of circuit greatly.This moment the differential amplifier balance, 2 current potentials of B, C equate, so complex pipe T11 and T12 all end, servomotor SD does not work, film projector is normally shown.If anacoluthon in projection, occurred, after the pulse that photoelectric detective circuit is exported by the T2 pipe is added to the multistage RC integrating circuit of anacoluthon detecting circuit,, certain voltage output is added to the input end of integrated transporting discharging IC with regard to being arranged.When behind integrated transporting discharging, reaching the cut-in voltage of D3, the D3 conducting, T3 is also by by becoming conducting, T4 is then become by conducting and ends, as T4 by the back collector potential by zero kick to anode generation certain amplitude.Positive spike pulse of differentiating circuit output makes the conducting of D9 pipe.Then the A point by unsettled by D9 ground connection, because of the capacitor C in the multistable trigger circuit 3 has been full of when T5 ends, so the A point has been added to the transmitter of T6 through the ground degree, T6 is become by conducting to be ended, this moment, the collector of T6 was exported noble potential, and divide three the tunnel to export, and the base stage that the resistance of leading up to is added to the T5 pipe makes T5 become conducting by ending, and the resistance of leading up to charges to C4.Three the tunnel then have been added to the base stage of differential amplification T9 by resistance, the base potential of T9 rises, and collector potential descends, but still keeps conducting because of T8 manages.So the T10 base stage and the collector potential of differential amplifier circuit do not change.Hence one can see that, and current potential that C orders is higher than the B point, pnp type complex pipe T12 conducting, and motor SD begins to rotate to a direction, and the regulating shaft rotation that drives the framing device on the projector by worm and wormwheel just can be corrected anacoluthon.In case anacoluthon is repaired, the pulse signal the when output of photoelectric detective circuit T2 has become normal the projection again, anacoluthon detecting circuit no-output, by last analysis motor SD stall as can be known, an anacoluthon adjustment finishes.When the secondary anacoluthon occurring, utilize above-mentioned identical analytical approach as can be known motor SD will regulate anacoluthon to rotating with once opposite direction.When certain adjustment the regulating shaft of framing device is rotated to+360 spacing the time, then a certain switch among the K2 is just connected, unijunction transistor T13 conducting at once according to the motor automatic reverse as can be known of above-mentioned identical analytical approach, is adjusted in the opposite direction.

This device is reasonable in design, adjusts multiple functionally, can not only in time find anacoluthon, and can rapid adjustment, uses this device can guarantee high-quality projection.

Claims

1, a kind of automatic adjustment projector picture anacoluthon device, it is characterized in that this device is by photoelectric detective circuit, anacoluthon detecting circuit, control are adjusted circuit and are carried out and adjust circuit four parts composition, the output of photoelectric detective circuit links to each other with the input of anacoluthon detecting circuit, the output of anacoluthon detecting circuit is connected the input end that circuit is adjusted in control, the input end of circuit is adjusted in the output control execution of controlling the adjustment circuit, and the framing device on the output O control projector of execution adjustment circuit also links to each other with the input end of control adjustment circuit.

2, device according to claim 1 is characterized in that photoelectric detective circuit is made up of infrared transmitting tube D1, phototriode T1, bipolarity efferent duct T2 and gauge tap K1.

3, device according to claim 1 is characterized in that the anacoluthon detecting circuit is made up of multistage RC integrating circuit, integrated transporting discharging IC, triode switch T3, T4 and the differentiating circuit that utilizes diode switch D3, D4 internal resistance and capacitor C 1 to form.

4, device according to claim 1 is characterized in that controlling the adjustment circuit and is made up of multistable trigger circuit T5, T6, T7, T8, unijunction transistor multivibrator T13 and differential amplifier circuit T9 T10.

5, device according to claim 1 is characterized in that carrying out and adjusts circuit by npn complex pipe T11, and pnp complex pipe T12 and DC servo motor SD form.