JPH035741A - Display element illuminator for camera and accessory - Google Patents

Abstract

PURPOSE:To simplify operations by controlling the turning on/off of an illuminator for liquid crystal display elements composing an accessory by means of interlocking with the control of the turning on/off of an illuminator for the liquid crystal display elements of a camera through the operation of the operating member of the illuminator on the camera side. CONSTITUTION:The subject illuminator is provided with an external display device wherein the camera B and the accessory A are composed of the liquid crystal display elements 24 and 11, the illuminators 26 and 9 illuminating the liquid crystal display elements 24 and 11, and the operating members 27 and 12 actuating the illuminators 26 and 9. When the camera B is joined with the accessory A, the illuminator 26 for the camera B is controlled through the operation of the illuminator operating member 27 on the side of the camera B, and by interlocking with this control, the illuminator 9 for the accessory A is controlled. Consequently, the turning on/off of the illuminators for the camera and accessory can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a lighting device for a liquid crystal display element of a camera and accessories.

<Prior art> In recent years, as an external display means for cameras and accessories,
Liquid crystal display elements are increasingly being used.

Since this liquid crystal display element is a photon-controlled element,
The disadvantage was that it became difficult to see in the surrounding environment, that is, in dark places. Therefore, some cameras and accessories are equipped with a lighting device near the liquid crystal display element, so that in dark places, the lighting device can be turned on to illuminate the liquid crystal, making it possible to check the displayed content. It has become.

<Problems to be Solved by the Invention> However, the camera and accessories equipped with the illumination device of this conventional example must each individually operate the operating members of the illumination device, making it difficult to control the display contents of the camera and accessories. It was very troublesome when I wanted to check both at the same time.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional examples and to provide a lighting device that can be easily turned on and off for cameras and accessories.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides an external display device in which a camera and an accessory each include a liquid crystal display element, a lighting device for illuminating the liquid crystal display element, and the illumination device. When the camera and the accessory are connected, the illumination device of the camera is controlled by operating the illumination device operation member on the camera side, and in conjunction with this, the accessory is activated. The lighting device is also configured to control the lighting device.

<Function> The illumination device of the display device in the camera and accessory configured as described above can be used to illuminate the camera by operating the operation member for the illumination device of the camera when the camera and accessory are combined. It is possible to control the lighting or extinguishing of the stomach and to control the lighting or extinguishing of the accessory lighting device in conjunction with the lighting or extinguishing of the stomach, thereby simplifying the operation.

<Example> Embodiments of the present invention will be described below based on the drawings.

In the figure, A is a flash device as an accessory, and B is a camera. A power switch 1 and a power source 2 are connected in series to the flash device A, and a booster circuit 3 is connected in parallel to this series body.
．． Capacitor 4. Trigger circuit 5. A flash tube 6 consisting of a xenon tube or the like connected in series and a light emission control circuit 7. A lighting device drive circuit 8 is connected to each drive circuit 8, a liquid crystal display element lighting device 9 is connected to the drive circuit 8, and a trigger circuit 51, a light emission control circuit 7. Drive circuits 8 are connected to each other, and a liquid crystal display element (LCD) 11. Switches 12 for inputting turning on or turning off the lighting device 8 are connected respectively, and when the control is outputted to the drive circuit 8, the turning on or turning off of the lighting device 9 is controlled in conjunction with the input operation of the switch 12. , a C8O terminal that is input from the camera B side as a data communication line connected to the microcomputer on the camera B side, an SCI terminal that inputs information from the flash device A to the camera B side, and a frequency clock that synchronizes these. a 5CLK terminal for a line, an ST terminal for a line that transmits a light emission stop signal based on information from a known TTL dimming means (not shown),
An X terminal is provided for output in conjunction with the completion of the shutter front curtain run of the camera. It should be noted that if the lighting device 9 continues to be lit for a certain period of time or more, it is automatically controlled to be turned off by the flash device microcomputer 10.

On the other hand, the +3 camera microcomputer 21 port of camera B is connected to the C8O terminal, SIC terminal, 5CI- terminal, and ST terminal of the flash device A side via the interface (Ilo) 22, and also via the driver 23. It is connected to a liquid crystal display element lighting device 26 and a switch 27 via a liquid crystal display element (LCD) 24 and a drive circuit 25, respectively, and when a control signal is output to the drive circuit 25, the switch 27
A switch 28 is connected to the X terminal of the flash device A and is turned on when the front curtain of the shutter has traveled.
It is equipped with In addition, like the flash unit BA, the lighting device 26
It has a function that automatically turns off the light using a timer if it remains lit for a certain period of time.

In this embodiment with the above configuration, camera B and flash device A
When the power switch 1 is turned on in a state where the 7 to adjust the amount of light emitted.

Then, when the switch 27 of the camera B is operated, the camera microcomputer 21 outputs a control signal for starting the drive circuit 25 of the lighting device 26, and the lighting device 26 is started. At this time, the camera microcomputer 21 responds to this operation with 31! Then, a message is sent to the flash device microcomputer 10 via the data communication line C8O via l1022 that the illumination device 26 of the camera is in the driving state. Upon receiving this information, the flash device microcomputer 10 outputs a control signal for starting the lighting device drive circuit 8 of the flash device, and starts the lighting device 9. This makes it possible for the illumination device 26 of camera B and the illumination device 9 of flash device A to light up simultaneously, and the LCD 24.1
1 can be illuminated at the same time.

Next, by operating the switch 27 again, the drive circuit 25 of the illumination device 26 of camera B is stopped and the illumination device 26 is turned off. Further, the camera microcomputer 21 notifies the flash device microcomputer 10 that the illumination device 26 of the camera B has been turned off, and causes the flash device microcomputer 10 to also stop the illumination device drive circuit 8 of the flash device A to turn off the illumination device 9. If the switch 27 is not pressed again, each microcomputer 21.10
The light is automatically turned off by the timer set by .

Note that even if the lighting device 9 on the internal lighting device A side is turned on by pressing the switch 27, turning off the light may not be controlled by pressing the switch 27 again.

Furthermore, although a flash device was used as an accessory in the above-mentioned embodiment, the back cover of a data bag or the like may be used as another accessory, and is not particularly limited. It may also be used for illuminating the scale.

<Effects of the Invention> As explained above, the present invention controls the operation of the accessory liquid crystal display element in conjunction with the control of turning on or off the camera's liquid crystal display element by operating the operating member of the camera side lighting apparatus. By controlling the lighting or extinguishing of the lighting devices, there is an effect that the control operations of those lighting devices can be performed accurately and easily.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an illumination device for display elements of cameras and accessories according to the present invention. A... Flash device (accessory), B... Camera,
8... Drive circuit, 9... Illumination device, 10... Flash device microcomputer, 11... Liquid crystal display element (LCD),
12... Switch (operation member), 21... Camera microcomputer, 22... Interface (Ilo), 24
. . . Liquid crystal display element (+-CD), 25 . . . Drive circuit, 26 Lighting device, 27 . . . Switch (operation member).

Claims (1)

[Claims] 1. The camera and the accessory each have an external display device consisting of a liquid crystal display element, a lighting device that illuminates the liquid crystal display device, and an operating member that activates the lighting device, and when the camera and the accessory are combined, the camera A lighting device for a display element of a camera and an accessory, characterized in that the lighting device of the camera is controlled by operating a side lighting device operation member, and the lighting device of the accessory is also controlled in conjunction therewith.