JPH02222935A - Data imprinting device for camera - Google Patents

Abstract

PURPOSE:To obtain a sharp data display character by enhancing the transparency of the data character part more than that of the other non-display part, thereby transmitting the light of a lamp, etc., and imprinting a data character part displayed on a liquid crystal cell into film. CONSTITUTION:A data imprinting device 9 is arranged close to the rear surface of the film 6 and data is imprinted onto the film 6. In receiving a driving electrical signal from a substrate 5, the liquid crystal cell 10 displays the data, and a lamp 12 lights up. Its light is led to and reflected by a reflecting plate 11, passes through the display part of the liquid crystal cell 10 as more uniformized indirect illuminating light, and comes to the film 6, thereby imprinting data. As for the reflecting plate 11, faces other than light receiving/outgoing face go to light irregularly reflecting ones and reflecting efficiency is raised. Consequently, a sharper data display character can be obtained.

Description

[Detailed Description of the Invention] The present invention enables data display characters to be printed more clearly in a data-printing camera in a small space without spoiling the image of the photograph, and also to simplify the data printing device. The objective is to provide a better product by making the product smaller, using only one battery, making it more compact, and increasing the longevity of the battery.

Conventionally, data was imprinted using a light emitting diode (hereinafter referred to as LICD).
data was displayed on the film in synchronization with the shutter operation, and was transferred onto the film.

If you explain along the drawings, as shown in Figures 1 and 2, the LED
Fix LEDs a, lb, lc, ld, le, if to the LED board 2, and connect the LEDs la, lb, l with wires 3 (plural).
The seven segments provided in each of c, ld, le, and if are wire-bonded to the electrodes 2a (plurality) of the LED board 2, and molded with a transparent molding agent 4 to configure an LED block. At the same time as soldering is fixed to the board 5, electrical continuity with a control circuit is attempted. Said L
Data displayed by light emission is imprinted on a film 6 disposed close to the ED block. However, in the case of data imprinting using LEDs, the imprint quality is poor, the cost and maintenance costs of the device are high, and the miniaturization and thinning of the camera are impaired. To explain in detail, first of all, regarding the imprint quality, the data imprinted area does not appear clearly, and when the color of the ground photographed with color film and the emitted light color of the LED are similar, the photographed object and background are bright and the LED This is a case where the displayed color becomes lighter. Even if you adjust the LED brightness according to the film sensitivity, you cannot make a significant improvement unless you detect the brightness and color tone of the object and background and make finer brightness adjustments, and the equipment becomes expensive. If the above-mentioned brightness adjustment is not appropriate and the driving current of the LED flows too much, the displayed characters may be enlarged due to the lens effect of the molding agent 4, and the printed characters may bleed. The LEDs 1a and lb.

This is because there is no slit between lc, ld, le, and if. In addition, the time intervals between the displays are wide and the imprinting is not organized, and this is a problem that cannot be avoided in order to secure space for wire bonding, as there is a limit to the miniaturization of the LEDs.
It spoils the image of the photo that you are trying to casually imprint with data. Regarding the high cost and maintenance costs of the second device, the purchase price of the LEDs is high, and at least six units are required to display the year, month, and day, and the LED blocks are The problem is that it requires a lot of mounting man-hours and costs are high. In addition, the LED operation requires a 3V drive using two batteries connected in series, and in order to enable continuous shooting, it is necessary to imprint data within a time of 30 to 10m5ae, so the drive current of the LED is reduced. Since the number of batteries must be increased, the service life of the batteries is short, and two batteries are required to be replaced, which increases maintenance costs. The third problem that impedes the ability to make the camera smaller and thinner is that the LED block is structurally difficult to make smaller and thinner, and also requires space because two batteries are used. be.

The present invention attempts to compensate for the above-mentioned defects by increasing the transparency of the data character area displayed on the liquid crystal cell and other non-display areas, and transmitting lamp light etc. through this area to imprint the data on the film. To explain this according to the drawing, the subject 7 is exposed to the film 6 by the lens 8 as shown in Fig. 3.
The structure of the data imprinting device 9, in which data is imprinted on the film 6 by placing the data imprinting device 9 close to the back side of the film 6, is shown in FIGS. 4 and 5.
As shown in FIG. 6, a reflection plate 11 made of a light guide member and an illumination member 12 such as a lamp are arranged on the back side of the liquid crystal cell 10, and the liquid crystal cell 10 is held and covered with a cover member 13 made of an opaque material. It is detachably attached to the cell 10.

1. Connecting the electrode portion 10a of the liquid crystal cell 10 and the electrode portion 5a of the flexible substrate 5; Furthermore, the lamp 12 is connected to the electrode portion 5b. Upon receiving a driving electric signal from the substrate 5, the liquid crystal cell 10 displays data, the lamp 12 is turned on, and the lamp light is transmitted to the reflection plate 11.
The light is guided and reflected by the film 6 and transmitted through the display section of the liquid crystal cell 10 as more uniform indirect illumination light.
The reflecting plate 11, which performs data imprinting, has surfaces other than the light receiving and light emitting surfaces as diffusely reflecting surfaces to improve reflection efficiency. Further, FIGS. 5 and 6 show a means for increasing the reflection efficiency by making the lamp 12 on the reflecting plate 11 golden. For data imprinting, the liquid crystal cell 10 may be constantly displayed and the lamp 12 may be turned on during photographing.
0 and the lamp 12 to control their operation in synchronization. FIG. 7 shows an example in which a self-luminous member such as a tritium lamp 14 is used as an illumination member.The liquid crystal cell 10 is controlled to be displayed only during photographing, and the display section is made to transmit the light emitted from the tritium lamp 14. It shows the means to imprint on the image. As shown in FIGS. 8 and 9, the liquid crystal cell 10 includes a transparent member 15 such as glass.
For example, twist nematic liquid crystal agent 1 is placed in the gap of 16.
7 is sealed with a sealing material 18, and the transparent member 15.
Deflection plates 19a and 19b so that the deflection axis is parallel to 16.
The liquid crystal molecules of the display portions 20a (plurality) to which voltage is applied to the liquid crystal agent 17 are different, and the display portions 20a are transparent and other portions are displayed black. The display portion 20
An electrode part 1 where patterns 15a (plurality) drawn out from a are collected on both sides and combined with the electrode part 5a of the substrate 5.
0a is formed. It is also possible to drive the liquid crystal using a multiplex driving method, an example of which is shown in FIG. let me do it,
It is also possible to change the orientation of the liquid crystal molecules in the voltage application area to be perpendicular to the voltage application electrode, and to also arrange the molecules of the dye in the same perpendicular direction, thereby removing the blocking of light by the dye and allowing the lamp light to pass through. be.

Further, as shown in FIG. 12, the operation of the data imprinting device 9 is controlled by, for example, a clock circuit 21 as a counting device.
The clock circuit 21 is controlled by an exposure control circuit 23 that is linked to the operation of the shutter 22.

As described above, according to the present invention, characters etc. for data imprinting are not affected by the color tone or brightness of the background where the data is imprinted, and the illumination member is included in the illumination reflection member, so that the data imprinting can be made uniform. Indirect lighting allows for stable imprinting, and the use of guest-host liquid crystals ensures reliable light blocking. In addition, since the liquid crystal cell close to the film also serves as a slit for lamp light, it is possible to print bright, blur-free lamp light clearly and easily. Furthermore, the characters displayed on the liquid crystal cell can be made much smaller than on LEDs, and because the characters can be spaced at appropriate intervals, the imprinted area is well-organized and does not spoil the image of the photograph, increasing practicality. First, liquid crystal cells have low raw material costs and can be mass-produced because only one cell is needed, and the lamps are also cheaper than LEDs, which reduces the number of man-hours required for mounting them. Since the lamp is small, it is possible to run at a low cost, and since the driving voltage of the lamp is lower than that of an LED, and the current consumption is also lower, only one battery is required.In addition, the longevity can be improved, and maintenance costs can be eliminated. Since the device, the lighting device, etc. are removable, maintenance is easy and maintenance costs can be reduced. In addition, the data imprinting device of the present invention can be made structurally smaller and thinner,
It also has the advantage of contributing to the miniaturization of the camera because it uses only one battery.Of course, depending on the application, it is also possible to colorize the lamp or deflection plate, etc. to colorize the imprint data. Furthermore, if a self-luminous member such as the tritium lamp described above is used instead of the lamp, it is effective in terms of energy and circuit configuration.

Incidentally, by arranging the data imprinting device 9 on the back side of the film 6 as in the present invention, the tight space on the lens 8 side is alleviated, which of course contributes to making the camera smaller and thinner. It is.

[Brief explanation of the drawing]

FIGS. 4, 5, and 6 are perspective views showing an outline of the invention.
7 are cross-sectional views showing a data imprinting device of the present invention, FIGS. 8, 9, and 10 are a plan view and a cross-sectional view showing a liquid crystal cell for data imprinting, and FIG. The figure is a block diagram diagrammatically illustrating a circuit for controlling the camera data imprinting device. la ~1f---LED 2 ・ ・ ・ ・ ・ 5 ・ ・ ・ ・ 6 ・ ・ ・ ・ 9 ・ ・ ・ ・ 10 ・ ・ ・ ・ 11 ・ ・ ・ ・ 12 ・ ・ ・ ・ ・13 ・ ・ ・ ・ ・ 14 ・ ・ ・ ・ 15, 16 ・ 17 ・ ・ ・ ・ 19a, 19b 20 I ・ ・ ・ ・ LED board film data imprinting device Liquid crystal cell reflector lamp cover part Tritium lamp transparent member Liquid crystal polarizing plate Guest host Liquid crystal above Figure 2 Figure 8 Figure 3 Figure 4 Figure 5 Figure 9 Figure 70 Figure 11

Claims (1)

[Claims] In a data imprinting device for a camera that is connected to a clock circuit and imprints time information, etc. onto the film, a liquid crystal cell using a guest host liquid crystal that is placed facing the film and makes the voltage application electrode part translucent. A data imprinting device for a camera, consisting of a lighting member that emits light and imprints data in conjunction with shutter operation.