JPH01310334A - Data imprinting device - Google Patents

Abstract

PURPOSE:To imprint elapsed time by providing a stopwatch device which continues time measuring operation, maintaining the time measurement by the stopwatch device by the shutter open detection of a camera and imprinting the maintaining content on a film surface. CONSTITUTION:When a release button is pressed, a shutter control signal SHCTRL is output from a camera control circuit 12, and the shutter is immediately opened by the operation of a shutter circuit 13 and the exposure to the film is started. A one shot pulse circuit 14 responds to the leading edge of the signal and generates the pulse of the time corresponded to the film sensitivity information ISO which is input from the circuit 12. A imprinting lamp 47 is lighted for such pulse time, and the count value of that time, namely the elapsed time, is imprinted through a liquid crystal display element LCD 53. In case the shutter release is carried out while the count value is proceeding, the operation after clock input to a DFF 1 is the same, and the elapsed time from the shutter release to this shutter release is imprinted on the film surface.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement of a data imprinting device for a camera which is equipped with a stopwatch means and imprints the timed information on the film surface.

(Background of the Invention) Conventionally, the elapsed time during sports activities has been measured in units of 1/10 seconds or 1/100 seconds, and the contents of the measurement (for example, the time required for Loom running) are transferred onto a film surface. There was no data imprinting device equipped with a stopwatch function, which had been developed in such a way that this type of device would appear.

In addition, in conventional data imprinting devices, 1/10
When imprinting date and time data that is counted in seconds or 1/100 seconds, if the data is not latched during imprinting, the count value will advance during imprinting and characters will be imprinted multiple times. There are problems such as closing the camera, and unless the timing of this latch is set to be the same as the timing of opening the shutter, there is a problem that the image captured on the film and the content of the imprint data do not match. Furthermore, in an apparatus configured such that a liquid crystal display element is used as an imprint element, data formed by the liquid crystal display element is irradiated with a lamp or the like, and the imprint is performed using the transmitted light, the display of the liquid crystal display element is Since the response speed is slow, there is a problem that erroneous data will be imprinted unless the imprint timing is delayed from the latch timing (by the response delay time).

In order to improve the above points, Japanese Patent Application Laid-Open No. 55-227
No. 22 and the like have been proposed, but such devices also have the following new problems.

1) Since the response time of the liquid crystal display element generally has a positive temperature characteristic, even if a certain delay time is provided, the response of the liquid crystal will not be in time at low temperatures.

2) If the delay time is set large enough to cover even low temperatures, it will take time for one shooting sequence at room temperature, and especially when the elapsed time data in units of 1/10 seconds or 1/100 seconds is It cannot handle the sports-like movements you are trying to capture.

(Object of the Invention) An object of the present invention is to provide a data imprinting device that can imprint elapsed time data from a certain point to an arbitrary point.

Another object of the invention is that, regardless of the ambient temperature used,
To provide a data imprinting device that can always imprint appropriate elapsed time data.

(Features of the Invention) In order to achieve the above object, the present invention provides a stopwatch means, a timekeeping start instruction means for starting timekeeping of the stopwatch means upon detection of a shutter release of a camera, and a timekeeping operation of the stopwatch means. a timekeeping reset means for resetting the camera; a holding means for holding the timekeeping contents of the stopwatch means upon detection of a shutter release of the camera; and displaying data from the holding means on a display element, and imprinting the displayed data on a film surface. a stopwatch means for starting a timekeeping operation in response to an instruction from the timekeeping start instruction means and continuing the timekeeping operation until reset by the timekeeping reset means; The present invention is characterized in that the timekeeping contents of the stopwatch means are held upon detection of an open position, and the held contents are imprinted on the film surface.

The invention also includes a stopwatch means, a timekeeping start instructing means for causing the stopwatch means to start timekeeping upon detection of a shutter opening of the camera, a timekeeping reset means for resetting the timekeeping operation of the stopwatch means, and a timing resetting means for resetting the timekeeping operation of the stopwatch means; A holding means for holding time measurement contents of the stopwatch means, an imprinting means for displaying data from the holding means on a transmission type liquid crystal display element and imprinting the displayed data on a film surface, and imprinting by the imprinting means. and a delay means for setting the timing after a delay time having a negative temperature coefficient corresponding to a response time of the liquid crystal display element from the time point when the data is held by the holding means,
The present invention is characterized in that the imprint timing is changed in accordance with the response time of the liquid crystal display element, the display response time of which changes depending on the peripheral temperature used.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a block diagram showing one embodiment of the present invention.
is an oscillation circuit, 2 is the output of oscillation circuit 1, divided into 1/10
A frequency divider circuit that generates a 0 second clock pulse, 3 is a decimal 1/100 second digit counter, 4 is a decimal 1/10 second digit counter, 5 is a sexagesimal second digit counter, and 6 is a decimal 1/10 second digit counter. 60
A decimal minute digit counter, 7 is a 24 decimal hour digit counter, and from the oscillation circuit 1 to counter 7, the number is 1/10.
It constitutes a clock circuit that measures the elapsed time in units of 0 seconds. 8 is a switch for manually starting and stopping the counting of the clock circuit, 9 and 11 are D flip-flops, 10 is a one-shot pulse circuit, and 12 is a camera. 13 is a shutter control signal inputted from the camera control circuit 12. A shutter circuit 14 opens and closes the shutter according to ICTRL. 14 is a shutter control circuit that opens and closes the shutter according to the film sensitivity information input from the camera control circuit 12. a one-shot pulse circuit for controlling the lighting time of the imprinting lamp; 15-18 are D flip-flops that latch the output of the counter 3; 19-22 are D flip-flops that latch the output of the counter 4; 28 is a D flip-flop that latches the output of the counter 5, 29-34 is a D flip-flop that latches the output of the counter 6, 35-39 is a D flip-flop that latches the output of the counter 7, and 40 is and gate, 41.
43 is a buffer, 42 is a resistive element with negative temperature characteristics, 44 is a capacitor, 45 is a base current limiting resistor, 46 is an imprint lamp drive transistor, 4
7 is an imprint lamp, 48 is an AND gate, 49 is a pull-up resistor, 50 is a switch for resetting the count of the above-mentioned timekeeping circuit, and 51 is a 17100 second digit (DAO to DA3).
), 1/10 second digit (DBO~DBS), second digit (DCO
~DC5), minute digit (000-005), hour digit (DEO
A decoder that takes NDE4) as input and converts it into a 10-digit 7-segment output, 52 is an LCD driver, and 53 is an LCD
, 54 is a Nant gate, 55 is a pull-up resistor, and 56 is an analog switch for discharging the capacitor.

In the above configuration, when a release button (not shown) is pressed, a shutter control signal 5HC is sent from the camera control circuit 12.
TRL is output, and the shutter is immediately opened by the action of the shutter circuit 13 to start exposing the film. When the rising edge of the shutter control signal 5HCTRL is input to the clock terminal of the D flip-flop 11, its Q output is inverted from "H" to "L", and the clock is also input to the D flip-flop 9 through the Nant gate 54. The Q output also becomes "H", and the output of the frequency divider circuit 2 is inputted to the 1/100 second digit counter 3 via the AND gate 48, and the counts of the counter 3 and counters 4 to 7 are The operation begins. Furthermore, since the Q output of the D flip-flop 11 is also input to the AND gate 40, the Q output of the D flip-flop 11 is "H".
- When it becomes "L", clock input to the D flip-flops 15 to 39 that perform count latching is prohibited, so the count value at the start is latched and input to the decoder 51.

Also, the Q output of the D flip-flop 11 is “L”-“H”
", and charging of the capacitor 44 is started via the buffer 41 and the resistance element 42. When this charging voltage exceeds the threshold level of the input of the buffer 43, its output is inverted and input to the one-shot pulse circuit 14. The one-shot pulse circuit 14 responds to the rising edge of its output and generates a pulse with a time corresponding to the film sensitivity information ISO inputted from the camera control circuit 12.As a result, the imprint lamp 47 is activated for the duration of this pulse.
lights up, and the count value at that time, that is, the elapsed time, is printed on the film surface through the LCD 53, which is a transmissive liquid crystal display element. Note that since the count content is zero at this initial stage, data "OO" is imprinted. At the same time, the analog switch 56 is turned on, and the capacitor 44 is discharged.

Next, when imprinting is completed, the falling edge of the one-shot pulse circuit 14 is input to the one-shot pulse circuit IO, the D flip-flop is reset, the output of the AND gate 40 becomes "H", and the count latch signal is D
A clock is input to the flip-flops 15-39, and the input to the decoder 51 changes according to the outputs of the counters 3-7.

On the other hand, even if the shirt tally release is performed while the count value is progressing, the operation after the clock is input to the D flip-flop 11 is the same, and this causes the timing of the shirt tally release (shutter opening). The elapsed time from when the shutter is released until the current shutter release is imprinted on the film surface. Incidentally, the counting need not be started by the release, but can be started by turning on the switch 8 and inputting a clock to the D flip-flop 9, if necessary. Further, in the cant state, counting can be temporarily stopped by turning on this switch 8.

By giving the resistor element 42 a negative temperature characteristic, the delay time from the latch timing to the lighting of the 4th imprint lamp can be set longer in consideration of the response of the liquid crystal at low temperatures, and set to be shorter at room temperature by using a capacitor. This can be realized by adjusting the time constant of 44.

By turning on the reset switch 50, the counters 3 to 7 and the D flip-flop 9 are reset, so that all the count contents become "0" and counting stops.

According to this embodiment, the data imprinting device is equipped with a stopwatch function and can maintain the elapsed time from this start to an arbitrary point, so that the elapsed time data from a certain point to an arbitrary point can be recorded. Imprinting is possible. In addition, since the delay means has negative temperature characteristics, it corresponds to the responsiveness of the liquid crystal even at low temperatures (
Since the timing of imprinting can be controlled () and the delay time is shortened at room temperature, it is possible to follow the fast sequence of the camera, such as when shooting continuously.

(Correspondence between Invention and Embodiment) In this embodiment, the clock circuit from the oscillation circuit 1 to the counter 7 is used as a stopwatch means, and the D flip-flops 9, 11 . The Nant gate 54 serves as a timekeeping start instruction means, the reset switch 5o serves as a timekeeping reset means, and the D flip-flop 11. ANDGATE 40. The D flip-flops 15 to 39 and the decoder 51 serve as holding means, the imprint lamp 47, the LCD driver 52. The LCD 53 serves as the imprinting means, and the one-shot pulse circuit 14. resistance element 42,
Capacitor 44. The buffer 43 corresponds to delay means.

(Effects of the Invention) As explained above, according to the present invention, the stopwatch means starts the timekeeping operation according to an instruction from the timekeeping start instruction means and continues the timekeeping operation until reset by the timekeeping operation stop instruction means. In addition, the timing information of the stopwatch means is retained by detecting the shutter release of the camera, and the retained information is imprinted on the film surface, so that it is possible to imprint the elapsed time data from a certain point to an arbitrary point. It becomes possible to do so.

In addition, since the display response time of the liquid crystal display element changes depending on the peripheral temperature used, the imprinting timing is changed according to the response time at that time, so regardless of the peripheral temperature used, the imprint timing is always appropriate. It becomes possible to imprint elapsed time data.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart thereof. l...Oscillation circuit, 2...Divide circuit, 3
~7...Counter, 9...D flip-flop, 1o...One shot pulse circuit,
11...D flip-flop, 12...
・Camera control circuit, 13...Shutter circuit, 1
4...One-shot pulse circuit, 15-39.
...D flip-flop, 42...Resistive element, 43...Buffer, 44...Capacitor, 47...Imprint lamp, 50...・
...Reset switch, 51...Decoder, 52...LCD driver, 53...
LCD. Patent applicant Canon Co., Ltd.

Claims (2)

[Claims] (1) A stopwatch means, a timekeeping start instruction means for starting the timekeeping of the stopwatch means upon detection of the shutter opening of the camera, a timekeeping reset means for resetting the timekeeping operation of the stopwatch means, and a timekeeping reset means for resetting the timekeeping operation of the stopwatch means, upon detection of the shutter opening of the camera. A data imprinting device comprising: a holding means for holding time measurement contents of the stopwatch means; and an imprinting means for displaying data from the holding means on a display element and imprinting the displayed data onto a film surface. (2) a stopwatch means, a timekeeping start instruction means for starting timekeeping by the stopwatch means upon detection of a shutter opening of the camera, a timekeeping reset means for resetting the timekeeping operation of the stopwatch means, and a timekeeping reset means for resetting the timekeeping operation of the stopwatch means; A holding means for holding the timekeeping contents of the stopwatch means, an imprinting means for displaying the data from the holding means on a transmission type liquid crystal display element and imprinting the displayed data on a film surface, and a copy by the imprinting means. A data imprinting device comprising: a delay means for setting the imprinting timing after a delay time having a negative temperature coefficient corresponding to the response time of the liquid crystal display element from the time point when the data is held by the holding means.