JPH03170922A - Data imprinting device for camera - Google Patents

Abstract

PURPOSE:To imprint data display characters, etc., clearly in a small space by arranging a light source which emits light associatively with the operation of a shutter arranged behind a liquid crystal cell on the opposite side from a film about a substrate which guides a display signal to the liquid crystal cell. CONSTITUTION:A reflecting plate 11 consisting of a light guide member and an illumination member 12 such as a lamp are arranged on the reverse surface side of the liquid crystal 10, the electrode part 10a of the liquid crystal cell 10 and the electrode part 5a of the flexible substrate 5 are coupled with each other, and the lamp 12 is coupled with the electrode part 5b. The liquid crystal cell 10 displays data by receiving an electric signal for driving from the substrate 5, the lamp 12 illuminates, and its lamp light is guided and reflected by the reflecting plate 11 and transmitted as uniformed indirect illumination light through the display part of the liquid crystal cell 10 to reach the film 6, where the data is imprinted. Consequently, data display characters, etc., can be imprinted in a clear and easy-to-see state and the characters are made smaller than LEDs, so that an image of a photograph is not spoiled.

Description

[Detailed Description of the Invention] The present invention uses a data imprinting camera to imprint data display characters more clearly, in a small space, and without damaging the image of the photograph, and also simplifies the data imprinting device. The purpose is to provide better products by making the product smaller, using only one battery, making it more compact, and prolonging the life of the battery.

Conventional data imprinting uses light emitting diodes (hereinafter referred to as LEDs) to illuminate and display data in synchronization with the shutter operation and imprint the data onto the film. To explain along the drawings, as shown in Figures 1 and 2, LEDs 1a, lb, Ic, l
d, le, if are fixed to the LED board 2, and wires 3 (plurality) are used to connect the LEDs la, lb, lc, ld, le, If.
Seven segments provided in each and the LED board 2
The electrodes 2a (plurality) are wire-bonded and molded with a transparent molding agent 4 to form an LED block, and the LED block is soldered to the substrate 5 and simultaneously connected to a control circuit. Data displayed by light emission is imprinted on a film 6 disposed close to the LED block. However, in the case of data imprinting using LEDs, the imprint quality is poor, the equipment cost and maintenance costs 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 if the color of the ground photographed with color film and the emitted light color of the LED are similar, the photographed object and background will be bright and the LED display This is the case when the color becomes lighter.

Even if the brightness of the LED is adjusted according to the film sensitivity, the brightness and color tone of the photographic subject and background must be detected to make finer brightness adjustments; this cannot be significantly improved, and the equipment becomes expensive. Put it away. The next problem is that the imprinted characters bleed. If the above-mentioned brightness adjustment is not appropriate and the driving current of the LED flows too much, the displayed characters are enlarged due to the lens effect of the molding agent 4, and the film 6 and the LED 1a, lblc. This is because there is no slit between ld, le, and If. In addition, the display character spacing is wide and the imprinting is not consistent, and this is unavoidable because there is a limit to the miniaturization of the LED and as mentioned above, to secure space for wire bonding. This is ruining the image of the photo you are trying to imprint data on. The second reason for the high costs and maintenance costs of the device is that the purchase price of the LEDs is high, and at least 6 pieces are required to display the year, month, and day, and the LED blocks are The problem is that it requires a lot of man-hours to implement, resulting in high costs. Also, the LED
It requires a 3V drive with two batteries connected in series for operation, and in order to enable quick shooting, it is necessary to imprint data within a time of 30 to 10 msec.
The driving current of D must be increased, the life of the battery is short, and two batteries need to be replaced, which increases maintenance costs. The third problem that impairs the miniaturization and thinning of Karame is that it is structurally difficult to make the LED block smaller and thinner, and it 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.
The idea is to pass lamp light or the like through this to imprint data onto the film. If you explain according to the drawing, the third
As shown in the figure, a subject 7 is imprinted onto a film 6 by a lens 8, and a data imprinting device 9 is disposed close to the back of the film 6 to imprint data onto the film 6. The structure of the data imprinting device 9 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 IO, and the liquid crystal cell 10 is held and covered by a cover member 13 from an opaque member. to be removably attached to the The electrode part 10a of the liquid crystal cell 10 and the electrode part 5a of the flexible substrate 5 are combined, and the lamp 1 is connected to the electrode part 5b.
It is constructed by combining two parts. Receiving a driving electric signal from the substrate 5, the liquid crystal cell IO displays data, the lamp 12 is turned on, and the lamp light is guided to the reflective lamp 1l and . The reflected and more uniform indirect illumination light is transmitted through the display section of the liquid crystal cell 10 and reaches the film 6, where data is imprinted. The reflecting plate 11 receives light and
The surface other than the light emitting surface is used as a light scattering surface to increase reflection efficiency.

Further, FIGS. 5 and 6 show a means for increasing the reflection efficiency by including a lamp 12 in the reflection plate l1.

For data imprinting, either a method is adopted in which the liquid crystal cell 10 is constantly displayed and the lamp 12 is turned on during photographing, or a method in which the liquid cell 10 and the lamp 12 are controlled 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 IO is controlled so that it displays only when photographing, and the display section is used to transmit the light emitted from the tritium lamp 14, and the film 6 is displayed. It shows the means to imprint on the image. As shown in FIGS. 8 and 9, the liquid crystal cell 10 has, for example, a twisted nematic liquid crystal agent 17 sealed in a gap between transparent members 15 and 16 such as glass with a sealant 18, and the transparent member 15, 16 is sealed with a sealant 18. 15.Polarizing plate 19a so that the polarization axis is parallel to 16,
The liquid crystal molecules of the display portions 20a (plurality) to which a voltage is applied to the liquid crystal agent 7 are arranged in a transparent manner, and the other portions are displayed in black. The patterns 15a (plurality) drawn out from the display portion 20a are gathered on both sides to form an electrode portion 10a coupled to the electrode portion 5a of the substrate 5. Note that the electrode section 10a of the liquid crystal cell 10 is driven by a multiplex driving method for liquid crystal driving.
It is also possible to make it unidirectional, and FIG. 10 shows an example of this. Furthermore, using the guest host liquid crystal 20 in which dye is mixed into the liquid crystal, the liquid crystal is driven as described above,
It is also possible to change the direction of the liquid crystal molecules in the voltage application part to be perpendicular to the voltage application electrode, so that the molecular arrangement of the dye is also perpendicular to the dye, thereby removing the blocking of light by the dye and allowing the lamp light to pass through. be. In this case, by adjusting the amount of the dye to allow the lamp light to pass through areas other than the data display area, the imprinted data can be made to stand out and be easily seen, and by selecting an appropriate dye tone, it can be applied to chromatic or achromatic backgrounds. It is now possible to make the white data characters stand out, further enhancing the effect. Figure 11 shows an overview of photographs taken using this method. As shown in FIG. 12, since the guest-host liquid crystal 20 itself, which contains sufficient dye, blocks light, polarizing plates 19a and 19b are not required as in the twisted nematic liquid crystal cell 10 described above, resulting in lower costs and a thinner structure. It makes it possible to

Further, as shown in FIG. 13, 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 on which the image is photographed, and the illumination member is included in the illumination reflection member, so that the data imprinting can be made uniform. Stable imprinting can be achieved using indirect illumination light, and the imprinted area can be made to stand out using a guest-host liquid crystal display or the like, and brightness can be easily adjusted. Furthermore, since the liquid crystal cell close to the film also serves as a slit for the lamp light, it is possible to imprint bright and unblemished lamp light in a clear and easy-to-see manner. 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. It can also be applied to film imprinting. Next, liquid crystal cells have low raw material costs and can be mass-produced as only one cell is needed, and lamps are also cheaper than LEDs and require less man-hours for mounting, making it possible to reduce costs.
Furthermore, 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, and the service life can be extended, maintenance costs can be reduced, and the display device, the lighting device, etc. can be easily attached and detached. Therefore, maintenance is easy and maintenance costs can be reduced. Further, the data imprinting device of the present invention has the advantage that it can be structurally smaller and thinner, and only one battery is required, contributing to the miniaturization of cameras. Of course, it is also possible to color the imprint data by colorizing the lamp or polarizing plate, etc., depending on the application. Furthermore, using a self-luminous member such as the tritium lamp described above in place of the lamp is effective in terms of energy and circuit configuration.

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

[Brief explanation of the drawing]

Figure 1. FIG. 2 shows an LED block portion of a conventional camera data imprinting device, FIG. 3 is a perspective view showing an overview of the present invention, and FIG. 5, 6, and 7 are cross-sectional views showing the data imprinting device of the present invention, and Figs. 8, 9, 10, and 12 show liquid crystal cells for data imprinting. 11 is a plan view and a sectional view, and FIG. 11 shows an outline of a photograph taken with data imprinting according to the present invention,
FIG. 13 is a diagram showing a circuit for driving and controlling the data imprinting device of this invention. la~If-LED 2...................................LED board 5...
・・・・・・・・・・・・Substrate 6・・・・・・・・・・
・・・・・・Film 9・・・・・・・・・・・・・・・
Data imprinting device 10... Liquid crystal cell 11... Reflector plate 12... Lamp 13. ......Cover member 14...
......Tritium lamp 15.16...Transparent member 17...Liquid crystal 19a. 19b...Polarizing plate 20...Guest host liquid crystal or higher

Claims (1)

[Claims] 1. A camera having an exposure control circuit, a data imprinting device including a display device and lighting device controlled by the exposure control circuit, a lighting reflecting member, a cover member, etc., a counting device, a power source, etc. In the cover device, the display portion is composed of a liquid crystal cell whose transparency is higher than the non-display portion, and the illumination device and the illumination reflecting member are removably attached to the back side of the cell with the opaque cover member. A data imprinting device for a camera, characterized in that the front surface side of the liquid crystal cell is arranged and configured so as to be close to the back surface of the photosensitive material. 2. The data imprinting device for a camera according to claim 1, wherein the reflecting member includes an illumination member. 3. The data imprinting device for a camera according to claim 1, wherein the illumination member is a lamp or a member having self-luminous properties. 4. The data imprinting device for a camera according to claim 1, wherein the display device other than the display forming portion is achromatic or chromatic. 5. The data imprinting device for a camera according to claim 4, wherein the non-display portion of the display device uses a liquid crystal containing a dye to allow the illumination light from the illumination device to pass therethrough.