JPH055591Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to a display device using a non-emissive display element such as liquid crystal, electrochromy, PLZT, etc.

(Prior Art) Some conventional electronic viewfinders (hereinafter referred to as EVF) using a cathode ray tube or the like are provided with an eyecup in order to focus the photographer's field of view on the viewfinder.

However, cathode ray tubes have the disadvantages of being difficult to miniaturize and consuming large amounts of power.

In recent years, liquid crystal televisions, electrochromy displays, PLZT displays, etc. have been put into practical use.

EVF is a non-emissive display element like this.
By using it as an EVF, a smaller, lighter, and more power-saving EVF can be obtained.

However, when using such a small non-emissive display element, it is desirable to attach an eyecup as described above, but in this case there is a drawback that the viewfinder becomes dark.

(Objective) An object of the present invention is to provide a display device that can overcome the drawbacks of the prior art as described above.

Another object of the present invention is to provide a display device that is useful for stabilizing a camera when used for a camera.

It is also an object of the present invention to provide a display device that is small and lightweight, can save power, and allows the user to easily concentrate on the screen.

(Example) The present invention will be described in detail below based on Examples.

FIG. 1 shows a first embodiment of the present invention, in which numeral 1 represents a non-luminescent display element such as liquid crystal, PLZT, electrochromic, etc., and here a reflective liquid crystal display element is shown. 2 is a casing of the display device, 3 is an eyepiece lens, and 4 is a flexible eyecup made of rubber or the like as a display frame, and has a shape as shown in the second figure.

5 and 6 are separated by a switch contact provided in a part of the casing 2. Reference numeral 7 denotes a contact piece made of conductive rubber, etc. This contact piece 7 is pasted in a part of the recess of the eye cup 4, and when no force is applied to the eye cup 4 in the direction of arrow A as shown in FIG. ,6
The contact pieces 5 and 6 are in contact with each other when a force in the direction of arrow A is applied to the eye cup 4.

8 is LED (light emitting diode) as a lighting means
It is provided in a recess 10 provided in a part of the casing to prevent the light emitted from the LED 8 from directly entering the eye through the lens 3.

Reference numeral 9 denotes a power source, which is configured to supply power to the LED 8 when the contact pieces 5 and 6 are electrically connected via the contact piece 7.

11 is a signal source such as a video camera, 12 is a liquid crystal drive circuit, and 13 is a main switch of the display device.

With this structure, when the operator brings the area around the eyes into contact with the eye cup, the switch contacts 5 and 6 become conductive and the LED 8 emits light, illuminating the display element 1. Therefore, when a display frame such as an eyecup is provided for such a non-emissive display element, a bright display can always be obtained.

Also, by providing such an eyecup, the distance between the lens or display element and the eye can be obtained to a certain extent correctly.

That is, if there is no display frame such as an eyecup, there is a risk that the user's eyes will hit the lens 3 directly, but this invention eliminates such concerns.

Next, FIG. 3 shows a second embodiment of the present invention, in which the same reference numerals as in FIG. 1 indicate the same elements.

In the figure, 1' is a transmissive liquid crystal display element.
In this embodiment, the LED 8 is configured to emit light from the back side of the display element 4, and
After turning on main switch 13, eye cup 4
The signal source 11 and/or the drive circuit 12 are configured so that the signal source 11 and/or the drive circuit 12 do not operate unless the area around the eyes comes into contact with the eye.

Therefore, it is possible to prevent power consumption while the operator is not looking at the monitor. Incidentally, if the wall surface 18 on the back side of the display element 1' is made, for example, a mirror surface, the light from the LED 8 may be projected from the front surface of the display element 1' as in the first embodiment shown in the first figure.

Next, FIG. 4 shows a third embodiment of the present invention, in which the operator illuminates the display element 1 simply by approaching the eye cup 4 without directly touching it, and also uses the signal source 11 and drive circuit. 12.

In the figure, 14 is a light emitting element, 15 is a light receiving element, 16
is a detection circuit, and 17 is the output of the detection circuit 16.
Switches 91 and 92 that are turned on and off are power supplies, respectively.

When the main switch 13 is turned on, the light emitting element 14 emits light by power supply from the power source 91, and when the operator approaches the eye cup 4, the reflected light is transmitted to the light receiving element 15.
Detected by This detection output is the detection circuit 16
If the level is higher than the specified level, switch 1 will be activated.
Turn on 7.

As a result, the LED 8 is turned on and the display element is illuminated, and the signal source 12 and the drive circuit 13 are supplied with power and begin to send signals to the display element 1.

As explained above, according to the embodiment of the present invention, when a small non-luminous display element is used, the eye cup can regulate the distance between the eyes and the non-luminous display element, and the visual field can be focused on the display element. be able to. Moreover, in this case, since the display element is illuminated with a part of the operator's body or an object such as an eye cup approaching or in contact with the display frame, the display element can be displayed brightly, and the operator can Since the display element is not illuminated when not being viewed, the power saving effect is high.

Further, in this embodiment, not only the illumination of the display element but also the signal source and the drive circuit of the display element are turned on by approaching or touching the display frame, so that the power saving effect is even higher.

Furthermore, since the eyecup is used as a display frame, it is effective in stably supporting portable devices such as video cameras. Of course, you can always get a bright display even in relatively dark places.

Note that the display frame is not limited to the shape shown in the second figure, and may be, for example, in the shape of a frame.

(Effects) As described above, according to the present invention, when a small non-emissive display element is used, the display element can display brightly, and the power saving effect is also high.

In addition, according to the present invention, by controlling on/off only the illumination means that illuminates non-luminous display elements while maintaining the display of display elements that generally have slow response, it is possible to monitor the photographer. It is possible to save electricity without damaging the system.

[Brief explanation of the drawing]

Fig. 1 is a diagram of a first embodiment of the present invention, Fig. 2 is a diagram of an embodiment of an eye cup, Fig. 3 is a diagram of a second embodiment of the present invention, and Fig. 4 is a diagram of a third embodiment of the present invention. be. 1, 1'...Non-light-emitting display element, 4...
...Eye cup as a display frame, 8...LED as a lighting means.

Claims (1)

[Claims for Utility Model Registration] A non-luminous display element that displays information signals supplied from a camera, illumination means for illuminating the display element, and a display having an opening provided around the display element. A frame, a detection means for detecting a state in which an object approaches or contacts an opening of the display frame, and a control means for controlling on/off of the illumination means based on the output of the detection means. display device.