JP2000066292A - Data imprinting device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clearly imprint photographing data regardless of a background color by providing a selective light emission means or the like for making any one of plural LEDs having a different emitted light color selectively emit light based on the decision of a color decision means. SOLUTION: The color decision circuit 38 obtains the red component R, the green component G and the blue component B of the whole by performing colorimetry concerning the color in three colorimetric areas in a photographing data imprinting area, and compares the respective components so as to make the LED having the same color as the minimum component emit the light. Namely, the circuit 38 makes any one of the red LED 21R, the green LED 21G and the blue LED 21B selectively emit the light through the selective light emission circuit 25 based on the compared result on the red component R, the green component G and the blue component B. By such constitution, the photographing data is recorded in the different color in accordance with the background color on color film, so that the photographing data is clearly imprinted and recorded regardless of the background color.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data imprinting device for a camera which imprints photographing data such as a photographing date on a photographing film.

[0002]

2. Description of the Related Art A device for imprinting photographing data such as a photographing date, an aperture value and a shutter speed value on a silver halide film has been proposed and put into practical use. In addition, the brightness of the subject in the data projection section is detected so that clear shooting data is always projected regardless of the subject brightness, and the shooting time of the shooting data and the brightness of the light source are changed according to this brightness. Devices for causing this to occur are also known. However, if the imprinted color of the photographed data is similar to the color of the background (data imprinting portion), there is still a problem that the imprinted photographed data is difficult to determine. More specifically, an orange color is often used as the imprint color of the photographed data. If the background is orange, the data is difficult to see.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a data projection apparatus capable of clearly projecting photographic data regardless of the background color, based on the above awareness of the conventional data projection apparatus. .

[0004]

SUMMARY OF THE INVENTION The present invention relates to a data projection device for a camera, which has a projection light source and a photography data module illuminated by the projection light source, and projects photography data on a part of a film. A plurality of LEDs having different colors are prepared as a projection light source, and a color determination means for determining a color of a shooting data projection area in a shooting screen is provided. It is characterized in that one of the LEDs is selectively lit.

[0005] The plurality of LEDs are a red LED, a green LED
And three colors of blue LED. Then, the color determination unit determines the color of the photographing data imprint area as a red system, a green system, or a blue system, and the selective light emitting unit selectively emits a red LED, a green LED, or a blue LED based on the determination result. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A back cover 11 of a camera is provided with a data projection device 20 shown in FIGS. This data imprinting device 20 imprints photographing data from the back of the color film 12, and as shown in FIG. 5, an imprinting light source 21, a mirror 22, and a liquid crystal data module 2.
3 As is well known, the liquid crystal data module 23 has a plurality of seven-segment elements 24 (FIG. 7), and these segments are selectively transmissive according to photographing data.
It is set in a non-light-transmitting state, and required photographing data is created.

[0007] In this embodiment, the imprint light source 21 is shown in FIG.
, As shown in red LED21R, green LED21G,
The three-segment elements 24 of the liquid crystal data module 23 are illuminated regardless of which of the three colors of the blue LED 21B and the blue LED 21B is lit. This red LED 21R, green LED 21G, blue LED 21B
Is selected by the selective light emitting circuit 25 when the photographing data is imprinted.
Either one is selectively emitted.

FIG. 8 shows an example of the colorimetric means 30 for photographing a picture. The colorimetric unit 30 is provided in a single-lens reflex camera, and an image on a finder screen 32 on which an image of a photographing lens 31 is formed is formed on a divided colorimetric substrate 34 via an image forming lens 33. . The divided colorimetric substrate 34 can be composed of, for example, a color CCD.

FIGS. 9 and 10 show a specific example of the divided colorimetric substrate 34. In the example of FIG. 9, the photographing screen (finder screen) is divided into 36 (4 × 9) areas, and FIG. In the example, the screen is divided into 9 (3 × 3) areas, and the hatched areas at the lower left are taken as the photographing data imprint areas 37, respectively. In the example of FIG. 9, there are three divided colorimetric areas in the photographing data projection area 37, and in the example of FIG. 10, the inside of the photographing data projection area 37 is further divided into three colorimetric areas.

The color determination circuit 38 measures the colors in the three colorimetric areas in the photographic data imprint area 37 to determine the entire red component R, green component G, and blue component B, respectively. The respective components are compared, and an LED having the same color as the minimum component emits light. That is, the color determination circuit 38 outputs the red LED 21R,
One of the green LED 21G and the blue LED 21B is selectively caused to emit light. It does not matter whether or not colorimetry is performed in a divided area other than the photographing data imprinting area 37 on the divided colorimetric substrate 34, or the mode of colorimetry.

The color film 12 pulled out from the film cartridge 13 and taken up on the film spool 14 is wound up by one frame each time one frame is shot by a well-known winding drive system 15. Then, at the end of the shooting of each frame, the shooting data held in the shooting data holding circuit 26 is called out via the driver 28 and displayed on the liquid crystal data module 23, and the display is selectively turned on by the red LED 21R. , Green LED 21G or blue L
As a result of being illuminated by the ED 21B, photographing data is printed on the color film 12 in the color of the illuminated light.

FIG. 11 is a flowchart showing an operation example. First, a photographing data projection area 3 of a subject image (photographing screen) formed on the divided colorimetric substrate 34 of the colorimetric means 30
The red component R, green component G, and blue component B of each of the divided colorimetric areas in 7 are measured (step S1). Next, the sizes of the red component R, the green component G, and the blue component B are compared, and if it is determined that the red component R is the minimum, the red LED 21R is caused to emit light via the selective light emitting circuit 25 (steps S2 to S2).
7). Therefore, on the shooting screen, the shooting data is printed in red in the shooting data printing area where the red component is minimum (green or blue).

If it is determined that the green component G is the minimum, the green LED 21G is made to emit light via the selective light emitting circuit 25 (steps S2 to S5, S7, S8). Therefore,
On the photographing screen, photographing data is printed in green in a photographing data imprinting area having a minimum green component (a tendency toward red or a tendency toward blue).

If it is determined that the blue component B is the minimum, the blue LED 21B is caused to emit light via the selective light emitting circuit 25 (steps S2 to S5, S7, S9). Therefore, on the shooting screen, the shooting data is printed in blue in the shooting data printing area where the blue component is the smallest (a tendency toward red or a tendency toward green).

The relationship between the emission color and the color of the photographic data projection area is merely an example, and a combination of colors that stand out among the background colors can be appropriately selected.

[0016]

According to the data projection device for a camera of the present invention, photographing data can be recorded on a color film in different colors depending on the background color, so that clear recording can be performed regardless of the background color.

[Brief description of the drawings]

FIG. 1 is a front view of a back cover having a data projection device of a camera to which the present invention is applied.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the single data printing apparatus.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a diagram showing a plurality of LEDs and a selective light emitting circuit thereof.

FIG. 7 is a front view of a seven-segment element of the liquid crystal data module.

FIG. 8 is an optical configuration diagram showing an example of a color discrimination device for a photographed screen.

FIG. 9 is a plan view illustrating an example of a divided photometric area of the color determination device of FIG. 8;

FIG. 10 is a plan view showing another example of the divided photometry area of the color discriminating apparatus of FIG. 8;

FIG. 11 is a flowchart showing an example of a printing operation of the data printing device of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 back cover 12 color film 20 data projection device 21 projection light source 21R red LED 21G green LED 21B blue LED 23 liquid crystal data module 24 7-segment element 25 selective light emitting circuit 30 colorimetric means 34 divided colorimetric substrate 37 photographed data projection area

Claims (3)

[Claims] 1. A data projection apparatus for a camera, comprising: a projection light source; and a photography data module illuminated by the projection light source, wherein the projection data is projected onto a part of a color film. , A plurality of LEDs with different emission colors
A color judging means for judging a color of a photographing data projection area in a photographing screen; and a selective light emitting means for selectively emitting one of the plurality of LEDs having different emission colors based on the judgment by the color judging means And a data imprinting device for a camera. 2. The data projection device according to claim 1, wherein the plurality of LEDs are a red LED, a green LED, and a blue LED. 3. The data imprinting device according to claim 2, wherein the color judging means judges the color of the photographed data imprinting area as a red system, a green system or a blue system, and the selective light emitting unit outputs the judgment result. A data projection device for a camera that selectively emits light based on a red LED, a green LED, or a blue LED.