JPH047538A - Data imprinting device for camera - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an improvement of a data imprinting device for a camera.

[Prior Art] In a data imprinting device for a camera that imprints characters composed of dots, movement of the film is detected by a roller that is in close contact with the film and a rotary encoder placed at the opposite end of the roller. However, the LED was controlled according to this detection result.

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, the roller that is in close contact with the film transmits the moving speed of the film through friction with the film, so it may be affected by slipping and it may not be possible to obtain an accurate moving speed. . Further, even while the LED is emitting light, it is necessary to supply power to the rotary encoder in order to detect the amount of film movement, resulting in large power consumption.

Therefore, in order to solve such problems, the present invention has the following features:
By detecting the amount of movement of the puff pores in the film as an optical change in the photo sensor, instead of using friction,
After determining the accurate moving speed of the film and imprinting with accurate dot spacing according to the determined result, and after determining the amount of movement, during the light emission of the light emitter for imprinting, The purpose is to simultaneously reduce power consumption by not supplying power to the photosensor.

[Means for Solving the Problems] The data imprinting device for a camera of the present invention has the following features: (1) a) Each dot can emit light independently when the film is moved, such as when the camera film is wound up or rewound. In a data imprinting device for a camera that records information with a light emitting body having one or more dots, b) film movement detection for optically detecting movement of the film from movement of a puff formation hole in the film; C) A light emission control means for controlling the light emission interval of the light emitter according to the moving speed of the film.

(2)a) The data imprinting device for a camera according to claim 1, further comprising a power supply control means for controlling power supplied to the film movement detection means.

[Function] Since the present invention has the above-described configuration, the film movement speed is calculated from a photosensor such as a reflective photo ink heater and the data obtained by the photosensor, and based on this calculation result, By the functions of the control means for controlling the light emission interval time of the light emitter and the power supply means for shifting the power supplied to the photosensor, the moving speed of the film can be accurately determined and the determined moving speed can be adjusted. Since it is possible to control the light emitting interval time of the light emitting body according to In addition, by supplying power to the photosensor only when film movement is detected by the power supply control means, power consumption can be reduced.

[Example 1] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 is a block diagram showing an embodiment of a data imprinting device for a camera according to the present invention. 1 is a reflective type) odo interrupter, 3 is an LED with seven light emitters, 2 is a light emission control means for the LED 3, 4 is an optical lens, 5 is a film, 6 is a reflector, 7 is a perforation hole in the film 5 , Sl is an ASA sensitivity input signal of the film 5, S2 is an input signal linked to the release, and 8 is a power supply control means for controlling the power supply to the reflective photo ink converter 1.

When the release of the camera is pressed, a signal S2 linked to the release is transmitted to the light emission control means 2, and the light emission control means 2 receives this signal and operates the power supply control means.
Power is supplied to the reflective photoink printer 1.

Next, the movement of the film 5 accompanying the film winding operation after the release is completed is detected by the reflective photo ink printer 1, and appropriate light emission control of the LED 3 is performed based on the detection data and the ASA sensitivity input signal, LED3
By condensing the light emitted by the optical lens 4 and forming an image on the film 5, characters, symbols, etc. are imprinted on the film 5 while the film 5 is moving.

Figure 2 shows the reflective photo ink printer 1 in Figure 1.
2 is a hardware diagram showing a circuit example of the light emission control means 2, the LED 3, and the power supply control means 8. FIG. 27 is an LED, 9 is a phototransistor, and 9 and 27 constitute a reflective photo ink converter l. 10 is ROM, RAM
, a microcomputer equipped with input/output terminals, etc., 11.
Numeral 12 is a key switch for inputting data for imprinting, and is used to input and set characters, numbers, symbols, etc. to be imprinted. Reference numerals 13 to 19 are transistors that flow current necessary to cause the LEDs to emit light, and the microcomputer 10 performs independent light emission control. The microcomputer 10, key switches 11 and 12, and transistors 13 to 19 constitute a light emission control means 2. 20 to 26 are LEDs, and transistors 13 to 26 are LEDs;
19, issuance is controlled independently. L.E.
The LED 3 is constituted by D20 to D26. Third
The figure is a timing diagram showing the operation timing from when the release button of the camera is pressed to when the imprinting LED 3 emits light using voltage waveforms.

When the camera release button is pressed, the S2
stands up. FIG. 3(a) is a voltage waveform diagram of S2.

At this time, depending on the ASA sensitivity r, if the ASA is 400, S
l becomes high level, and if it is ASAloo, it becomes low level. FIG. 3(b) is a voltage waveform diagram of Sl. Third
In Figure (b), an example of a film of A, 5A400 is shown. In response to the rise of S2, the micro convenience store 10 sets the input level of the power supply control means 8 to a low level, turns on the transistor 28, and supplies power to the reflective photoink printer 1. FIG. 3(d) is an input waveform diagram of the power supply control means 8. Next, in synchronization with the movement of the perforation hole 7 as the film 5 is wound up after the release button, a voltage as shown in FIG. A waveform is obtained. The low level part of the waveform in (C) shows that the light from the LED 27 passes through the perforation hole 7 and is reflected by the reflection plate 6, and then the light from the perforation hole 7. This is the case when the phototransistor 9 is irradiated through the phototransistor 9 and the phototransistor 9 is turned on. The high level part is the LED 2 of the reflective photo ink converter 1.
This is a case where the light of 7 is blocked by the film portion between the perforation hole 7 and the perforation hole next to it, and the phototransistor 9 is off. The microcomputer 10 measures the time period 29 from the third level change to the fifth level change of the voltage waveform at the collector of the phototransistor 9, and after the measurement is completed, sets the input level of the power supply control means 8 to high. level, the transistor 28 is turned off, and the power supply to the reflective photoink 1 is stopped. The microcomputer 10 calculates the moving speed of the film 5 from the time in the section 29, and calculates the moving speed and the input AS.
According to the A sensitivity, an appropriate light emission interval time and light emission time of the LED 3 are calculated, and the LED 3 is controlled. FIG. 4 shows a flowchart from determining the time period 29 to controlling the LED 3. First, in step 30, the time for section 29 is calculated. Next, at 31, set the distance between the perforation hole and the next perforation hole to be 4.74mm, at 30
Divide by the time found in to find the film moving speed. Next, assuming that the interval between dots imprinted on the film is 100 μm, the time required for the film to move 100 μm is calculated. Since the moving speed is obtained in 31, the time required for the film to move 100 μm is obtained by dividing 1100LL by the moving speed in 32, and this is taken as the basic light emission interval time of the LED. Next, in step 33, one light emission time is determined from the ASA sensitivity input in advance by Sl. Then in 34, 32
The LED 3 is controlled in order to imprint characters and symbols input in advance on the film using the light emission interval time and one light emission time determined by and 33.

By doing the above, data such as characters and symbols input in advance can be imprinted onto the film.

Furthermore, since the power supply to the reflective photo ink printer can be stopped during data imprinting, current consumption can also be reduced.

[Effects of the Invention] The data imprinting device for a camera of the present invention includes means for determining the film movement speed using a photosensor, and power supply control that supplies power to the photosensor only while determining the film movement speed. By means of this means, it is possible to obtain an accurate moving speed, and at the same time, it is also possible to reduce power consumption.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a data imprinting device for a camera according to the present invention. FIG. 2 is a hardware diagram showing the circuit example of FIG. 1. 3 is a timing diagram, (a) is a waveform diagram of S2, (b) is a waveform diagram of si, (C) is a waveform diagram of the collector of phototransistor 9, and (d) is a power supply control means 8 is an input waveform diagram of the transistor 13, and (e) is a base input waveform diagram of the transistor 13. FIG. 4 is a flowchart diagram. that's all

Claims (2)

[Claims] (1)a) Data imprinting for cameras that records information using a light-emitting body with one or more dots that can emit light independently from each other when the film moves, such as when the film is wound up or rewound. In the apparatus, b) film movement detection means for optically detecting movement of the film from movement of perforation holes in the film; c) controlling a light emission interval of the light emitter according to a movement speed of the film. 1. A data imprinting device for a camera, characterized by comprising a light emission control means for controlling the light emission. (2) a) A power supply control means for controlling the power supplied to the film movement detection means;
A data imprinting device for a camera according to claim 1.