JPS6227367B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for imprinting data such as a date on photographic film.

BACKGROUND ART A method using an electronic control circuit including a clock circuit is beginning to be adopted for imprinting information such as date and time onto photographic film.

As seen in the 1-chip watch LSI,
By using COMS technology, it has become possible to perform constant clock operation on an LSI with extremely low current consumption. Therefore, by adding an imprint control circuit to such a clock circuit, information can be imprinted automatically without setting the date and time information to be imprinted each time.

In the case of such an electronic circuit, there is an advantage that a display for photographing can be performed and a monitor display for the photographer to confirm the information to be photographed can be simultaneously performed. For example, a so-called transmissive liquid crystal, in which the font portion to be photographed becomes transparent, is interposed between the film surface and a light-emitting object such as a lamp.
During the imaging time, information is imprinted by irradiating light from the light emitter onto the film surface through the transparent part of the transmissive liquid crystal, and the lighting drive signal that is exactly the same as the lighting drive signal given to the transmissive liquid crystal for imaging is transmitted. A monitor display can be performed by applying a signal to a monitor liquid crystal.

In such a method, the information is
Six-digit hours and minutes are often used. In this case, it is common to display a colon symbol between the hour and minute numbers, and it is easy to understand, so the colon symbol is displayed on the monitor and the colon symbol is inserted in the photograph.

However, it is generally preferred to display the colon by blinking it at a rate of about 1 Hz to impress upon the observer the progress made every second.

However, if you try to take a picture by applying a colon drive signal that blinks at 1Hz to the picture-taking LCD, sometimes it will be pictured and sometimes it won't, depending on the timing of the picture and the timing of the blinking state. Defects arise.

Furthermore, even if the colon is forcibly turned on at the same time as the shooting starts, the response speed of the liquid crystal display will be several tens of thousands.
Because it is extremely slow at more than mS, the display response cannot be completed within the imaging time span of several mS.

This invention has been made in view of the above points, and includes a data imprinting method that blinks display parts such as colons on monitor displays, and also ensures that display parts such as colons are correctly captured when photographing. The purpose is to provide.

Embodiments of the present invention will be described below with reference to the drawings. The drawing is a circuit diagram showing an embodiment of the invention. In this figure, 1 is a photographing control circuit including a clock circuit, 2 is a liquid crystal display for monitor display, and 3 is a liquid crystal display for photographing. A drive signal line group 4 for driving character segments other than the colon on the liquid crystal display is led out from the imprint control circuit 1, and this drive signal line group 4 is connected to the liquid crystal display bodies 2 and 3.
connected to a non-colon character segment. A drive signal line 5 is led out from the projection control circuit 1 for statically driving (lighting up) the colon segment of the liquid crystal display.
is connected to the colon segment of the liquid crystal display 3 for imprinting. A drive signal line 7 is led out from the imprint control circuit 1 and is connected to the output of a blinking signal modulation circuit 6 which receives the drive signal line 5 as an input. Connected to the colon segment of 2. Further, a back electrode drive signal line 8 is led out from the projection control circuit 1, and this drive signal line 8 is connected to the back electrodes of the liquid crystal displays 2 and 3.

Next, the operation will be explained. Drive signal line group 4
The signal is an information signal generated by the projection control circuit 1, and is a signal generated by the monitor liquid crystal display 2.
The segments other than the colon are driven to display them in a static state, and the liquid crystal display 3 for photographing is driven.
Drive the segments other than the colon and display them in the same way. That is, except for the colon portion, the display contents on the liquid crystal displays 2 and 3 are the same.

The signal on the drive signal line 5 is a colon segment drive signal generated by the projection control circuit 1, and causes the colon segment of the projection liquid crystal display 3 to be displayed statically.

As a result, all the character segments except the colon are selected and displayed on the imprinting liquid crystal display 3, and the colon is displayed statically, so that when imprinting starts, Appropriate information including the colon is imprinted by the lamp light that starts emitting light.

On the other hand, the signal on the drive signal line 5 is modulated by a blinking signal modulation circuit 6 at, for example, 1 Hz, and the modulated signal is transmitted to the drive signal line 7.

Therefore, on the monitor liquid crystal display 2, other character segments except the colon are displayed appropriately in the same manner as on the imprinting liquid crystal display 3, but only the colon is displayed on the imprinting liquid crystal display. 3, it performs blinking display at a period of 1 Hz, for example.

This allows the observer to
Or, you can check the time while taking pictures, or at any time you want to check the time.
You can also check the progress of seconds by the blinking colon symbol display.

As described above, in the embodiment, the colon on the liquid crystal display for photography 3 is displayed statically, while the colon on the liquid crystal display for monitor display 2 is displayed blinking. This makes it possible to confirm the movement of seconds, and also allows the colon to be accurately captured regardless of the timing of the flashing.

In the examples, the case where the present invention is applied to a colon has been described, but it can also be applied to other specific cases where a static display is desired in a liquid crystal display for photographing, and a blinking display is desired in a liquid crystal display for monitor display (observation). The present invention can be similarly applied to segments of one or more display bodies.

As described in detail above, according to the data imprinting method of the present invention, for one or more specific display segments, a driving signal is given to the imprinting liquid crystal display body to statically display the image, and at the same time, Since the observation liquid crystal display is provided with a drive signal that causes a blinking display, the observation liquid crystal display can blink the display part corresponding to the segment for the convenience of the observer, and also allows for the convenience of the observer. The same display portion as above can be correctly captured regardless of the timing of the blinking. The data imprinting method of the present invention can be used as a data bag for imprinting the date, time, or other data, or for a camera with a built-in clock that can constantly observe the time and date.

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the data imprinting method of the present invention. 1...imprint control circuit including a clock circuit, 2...
Liquid crystal display for monitor display, 3... Liquid crystal display for projection, 4... Drive signal line group, 5, 7... Drive signal line, 6... Blinking signal modulation circuit, 8... Back electrode drive signal line .

Claims (1)

[Claims] 1. A data imprinting device that imprints information such as numerical values, symbols, or desired figures onto the surface of a photographic film and at the same time allows an observer to visually recognize the information, which includes a liquid crystal display for imprinting, and an observation device. In a data imprinting device in which a liquid crystal display for imprinting is separately provided, a drive signal is given to the liquid crystal display for imprinting to statically display a specific one or more display segments, and , a data imprinting method in which a driving signal is given to the observation liquid crystal display to cause it to blink.