JP2003060945A - Video display device - Google Patents

Abstract

(57) [Problem] To reduce the risk of image elements such as liquid crystals and cathode ray tubes or the inside of exterior parts being burned by direct incidence of sunlight from an eyepiece. SOLUTION: A tongue-like portion 4c whose length to the end face is longer than the other is provided in a second opening which is an eyepiece of a black rubber eye cap 4 of a finder, and the length of the tongue-like portion 4c is small. By making the opening length of the portion 4d larger, the tongue portion 4
c can be easily locked firmly by pushing c into small diameter portion 4d, and the lock can be easily released by the user pushing and sliding tongue-shaped portion 4c due to the elasticity of rubber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device such as a so-called viewfinder, which is configured in a video camera or the like and confirms a captured image, and more particularly to an eye cap for an eyepiece.

[0002]

2. Description of the Related Art In recent years, as for video cameras, both professional (commercial) machines used at broadcasting stations and amateur machines used at home have been attracting attention for high-resolution photography. Now, as a means for confirming the photographed image, an image on a liquid crystal screen of about 1 inch or a small cathode ray tube is magnified by a convex lens or a combination convex lens, and the user directly checks the image with the viewfinder that is checked by eye contact. Some are due to a 3-inch LCD monitor screen. In general, the viewfinder is often used because of its good followability when the subject is moving, or because of the ease of confirming a high-definition image and the degree of shielding against ambient light when shooting by a professional. There is. In such a viewfinder, a larger screen and a larger eyepiece are adopted in accordance with high resolution imaging, and the aperture of the convex lens is also large.

[0003]

However, in the above-mentioned conventional configuration, since the eyepiece portion has a large aperture, that is, the combined convex lens has a large aperture, it is easy for sunlight to enter directly, and the sun condensed by the convex lens is concentrated. There is a problem that the light beam due to the light burns out the screen of the liquid crystal, cathode ray tube, or the inside of the exterior part.

The present invention solves the above-mentioned problems of the prior art and has a simple structure and very easily shields most of the eyepiece.
An object of the present invention is to provide an image display device that can prevent sunlight from easily entering from the eyepiece section.

[0005]

In order to achieve this object, the present invention has a structure in which the tongue-like portion of the eyecap is pushed into and fixed to a small diameter portion to easily prevent the intrusion of sunlight. have.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention directs the lens portion toward the sun by pushing the tongue portion of the eyecap into the small diameter portion when the viewfinder is not in use. Also has the effect of preventing burnout due to sunlight.

The invention described in claim 2 has the effect of more clearly transmitting the effect to the user, as compared with claim 1.

The invention according to claim 3 has the function of pushing the tongue into the small-diameter portion to make the locking more reliable.

The invention according to claim 4 has the function of pushing the tongue into the small-diameter portion to make the locking more reliable.

[0010] The invention according to claim 5 has the effect of making the locking more reliable and improving the durability against bending of the root of the tongue-shaped portion with respect to the first aspect.

According to a sixth aspect of the present invention, in contrast to the first aspect, when the tongue-shaped portion is pushed into the small diameter portion, the viewfinder is in an unused state. It has an effect of preventing unnecessary power loss.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic diagram of the configuration of an image display apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a viewfinder casing which is an image display apparatus, and is a video A liquid crystal panel 2 which is a video display means for rendering a video signal output from a camera (not shown) as optical information, and a convex lens 3 for enlarging the screen are internally provided.

Reference numeral 4 denotes an eye cap, which is provided with two opening portions, a first opening portion 4a on the side attached to the housing 1 and a second opening portion 4b with which the user is in contact, facing each other.
Since the opening 4b comes into contact with the user's face, the eye cap 4 is made of elastic rubber. Further, the eye cap 4 is black or dark in color so as to shield ambient light so that the screen of the liquid crystal panel 2 can be easily seen by eye contact.
The first opening 4a is configured to be attached to the housing. The second opening 4b is formed such that the length from the end of the second opening 4b to the first opening 4a gradually increases.
A part of the end of the second opening is gently projected as a tongue-shaped portion 4c, and as described above, it is easy to contact the user's face and make eye contact, and to shield the disturbance light to the eyes. In the vicinity of the first opening, a small diameter portion 4d having a so-called squeezed shape in which the inner shape is partially narrowed is formed. The inner diameter of the small diameter portion 4d is determined by the size of the screen of the liquid crystal panel 2 and the outer diameter (effective diameter) of the convex lens 3 described above.
Further, the size of the tongue-shaped portion 4c of the second opening 4b is approximately the same as the size of the opening of the small diameter portion 4d, and the length of the tongue-shaped portion 4c (that is, the root of the tongue-shaped portion 4c). In other words, the distance from the boundary with the small diameter portion 4d to the end of the tongue 4c)
Is larger than the opening length of the small diameter portion 4d in the same direction. The small diameter portion 4d may have a bellows shape.

The operation of the video display device configured as described above will be described with reference to FIGS. 1 and 2. First,
As is well known, a photographer views one of the eyes of the eye cap 4 and sees the display image on the liquid crystal panel magnified by the convex lens. With this, at the time of shooting, it is possible to simultaneously check the image shot by the video camera (not shown), and the image signal from the image recording / reproducing device (not shown) such as a VTR for recording the image signal from the video camera. Can be confirmed.

When the photographer does not look at the viewfinder, such as when not taking a picture, when the video camera he is carrying is lowered from the shoulder or when the video camera held in front of his face is lowered, the eye cap of the viewfinder is There is a high possibility that the sunlight will be directed upward and directed to the sky, and the sunlight will be directly incident from the second opening which is the viewfinder eyepiece. In such a case, as shown in FIG. 2, the user previously folds the tongue-shaped portion 4c of the eyecap 4 from the root and puts the tongue-shaped portion end portion inside the small diameter portion 4d, Since the second opening 4b is entirely bent and the tongue-shaped portion 4c closes the small-diameter portion 4d, it is less likely that sunlight will directly enter the viewfinder. Although the tongue-shaped portion 4c tries to return to the original shape from the state of being pushed into the small-diameter portion 4d due to the characteristic of the elastic rubber, as described above, the length of the tongue-shaped portion 4c is smaller than that of the small-diameter portion 4d. Since it is long, the tongue portion 4c is locked to the small diameter portion 4d, and the original shape cannot be restored only by the characteristic of the elastic rubber.

On the contrary, when the user wants to check the viewfinder again, the user pushes the tongue-shaped portion 4c which is pushed in with the finger to slide the tongue-shaped portion 4c and the small-diameter portion 4d. Is released, and the elastic characteristics of the eye cap 4 cause the tongue-shaped portion 4c to rise and return to its original shape.

As described above, according to the present embodiment, the tongue-shaped portion having a slightly longer length than the small-diameter portion is provided in the second opening which is the eyepiece portion of the eyecap. Since it can be pushed into the small-diameter portion and locked, the small-diameter portion can be closed and sunlight can be less directly incident, and the liquid crystal panel cannot be burned.

(Second Embodiment) FIG. 3 is a partial schematic view of an eye cap of an image display device according to a second embodiment of the present invention. In FIG. 3, reference numeral 14 denotes an eye cap, which is a tongue portion 14
A small convex portion 14e is provided near the outside of c. The other configuration is the same as the configuration of FIG. 1 described in the first embodiment. Due to the small convex portion 14e, the tongue-shaped portion 14c becomes a finger catch when the tongue-shaped portion 14c is pushed into or removed from the small diameter portion 14d. In the drawing, the small convex portion is a plurality of hemispherical small protrusions, but of course it may be one. Alternatively, the illustration of the finger may be schematically projected in a linear shape, and it can be a simple explanation that it can be locked by pushing it, or a user graphic sign.

(Third Embodiment) FIG. 4 is a partial schematic view of an eye cap of an image display device according to a third embodiment of the present invention. In FIG. 4, reference numeral 24 denotes an eye cap, which is a tongue-like portion 24.
A key protrusion 24f is provided at the outer tip of c, and a key recess 24g is formed inside the small diameter portion so that the key protrusion 24f is inserted and locked when the tongue 24c is pushed in. The other configuration is the same as the configuration of FIG. 1 described in the first embodiment. The key convex portion 24f and the key concave portion 24
By the engagement of g, when the tongue portion 24c is pushed into the small diameter portion 24d, the locking becomes reliable.

(Embodiment 4) FIG. 5 is a partial schematic view of an eye cap of an image display device according to Embodiment 4 of the present invention. In FIG. 5, 34 is an eye cap, which is the small diameter portion 34.
A notch 34h is provided on the inner peripheral surface of d, and when the tongue 34c is pushed in, a part of the end of the tongue 34c is notched h3.
4 is configured to be easily locked. The other configuration is the same as the configuration of FIG. 1 described in the first embodiment. By the engagement of the tongue-shaped portion 34c and the notch 34h, when the tongue-shaped portion 34c is pushed into the small-diameter portion 34d, the locking is ensured.

(Fifth Embodiment) FIG. 6 is a partial schematic view of an eye cap of an image display device according to a fifth embodiment of the present invention. In FIG. 6, reference numeral 44 denotes an eye cap, and the eye cap 44 is provided with a bent portion 44i so that the tongue-shaped portion 44c is bent and is easily locked by the small diameter portion 44d as described above. The other configuration is shown in FIG. 1 described in the first embodiment.
The configuration is the same as that of. By this bent portion 44i, when the tongue-shaped portion 44c is pushed into the small-diameter portion 44d, the bent portion is uniformly determined and the locking is ensured.

The bent portion 44i has a groove on the inner side of the eye cap and a mountain on the outer side so that the overall thickness is not extremely thin so that the elastic rubber due to the frequency of bending is less likely to be cut. There is.

(Sixth Embodiment) Next, when the tongue-shaped portion of the eye cap closes the small diameter portion as in the above-described respective embodiments, the image display means such as the liquid crystal panel or the cathode ray tube operates. What is described above is a loss of power source energy such as a battery. Therefore, a video display device capable of preventing this loss and detecting the closing time to automatically suspend the video display means will be described.

FIG. 7 is a block diagram of a video display device according to a sixth embodiment of the present invention. In FIG. 7, an eye cap 54 is provided in the eyepiece portion of the housing 1, and the liquid crystal driving means 51 that inputs a video signal from a video camera (not shown) or the like converts the video signal into video information on the liquid crystal panel 2. Instead, the image is displayed by being illuminated by the backlight 2a from the back surface of the liquid crystal panel 2.

A detector 52 detects whether the tongue portion of the eye cap 54 is pushed into the small diameter portion as in the above-described embodiment. Specifically, for example, it is a push switch that operates with a minute stroke and a slight force. Alternatively, a small permanent magnet is provided at the tip of the tongue of the eyecap 54, and a magnetic field detecting element such as a hall element is used as a detector, and the hall element does not detect a magnetic field during normal use of the eyecap, that is, when it is not pushed. Alternatively, the magnetic field generated by the permanent magnet may be detected when it is pushed. The detection output of the detector 52 is the system control means 53.
Is input to the liquid crystal driving means 51 and the liquid crystal driving means 51
The power supply to the switch is cut off by the switch 56.

As a result, the system control means 53 can detect that the tongue-shaped portion of the eye cap 54 is pushed in, and it can be seen that the image display device is not used as a finder for image confirmation or the like. Power supply to 51 can be stopped, and useless power consumption can be suppressed.

Further, the switch 56 controlled by the system control means 53 is not one system from the power supply means 55 to the liquid crystal driving means 51, but one system for driving the liquid crystal and one system for turning on the backlight. The system control means 53, which detects that the tongue is pushed in, stops the power supply only to the backlight at the same time as the detection, and keeps the push-in constant. The driving of the liquid crystal panel may also be stopped after a lapse of time (for example, 3 minutes). If you do this,
The power supply can be precisely controlled, and in the case where the eye cap is pushed in frequently in fine sunlight, etc., it is possible to minimize the image instability resulting from the transient operation of the liquid crystal driving means at the time of power supply startup.

In the description of all the above-mentioned embodiments, the liquid crystal panel is used as the image display means, but the same effect can be obtained with other image display devices such as a cathode ray tube.

Further, even if a prism is provided between the image display device and the convex lens and the optical axis of the display surface of the image display device and the optical axis of the convex lens are bent substantially perpendicularly, The same effect can be obtained.

[0031]

As described above, the present invention has a simple structure,
When the image display device is used, the eyepiece can be shielded by the tongue of the eyecap, and the tongue can be used to close the eyepiece when not looking into the image display device to prevent direct sunlight from entering the image. An excellent effect of eliminating the burning of the display element can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a video display device according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the same.

FIG. 3 is a schematic diagram of a configuration of an eye cap according to the second embodiment.

FIG. 4 is a schematic diagram of the configuration of an eye cap according to the third embodiment.

FIG. 5 is a schematic configuration diagram of an eye cap according to the fourth embodiment.

FIG. 6 is a schematic diagram of a configuration of an eye cap according to the fifth embodiment.

FIG. 7 is a configuration block diagram of the sixth embodiment.

[Explanation of symbols]

1 case 2 LCD panel 3 convex lens 4, 14, 24, 34, 44, 54 eye caps 4a First opening 4b Second opening 4c, 14c, 24c, 34c, 44c tongue 4d small diameter part 14e Small convex part 24f key convex part 24g key recess 34h notch 44i fold 51 liquid crystal driving means 52 detector 53 system control means 55 Power supply means 56 switch

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshihiro Fujimoto             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 2H083 EE02 EE06 EE07                 5C022 AA11 AB67 AC02 AC03 AC08

Claims (6)

[Claims] 1. A video display means for displaying a video on a screen,
An image display device comprising: an optical means for enlarging a screen of the image display means; and an eye cap made of a dark elastic rubber for making an eye of the image enlarged by the optical means visible to a user. The cap includes a first opening on the side of the optical means, a second opening with which a user contacts, a small-diameter portion having an inner diameter narrowed between the first and second openings, and the second opening. A distance from the end surface to the small diameter portion is longer than the other end portion, and
An image display device, wherein a length of the tongue-shaped portion is larger than an opening length of the small diameter portion. 2. The image display device according to claim 1, wherein the eye cap is provided with a small convex portion near an outer side of the tongue-shaped portion. 3. The eye cap has a key convex portion provided at a tip of the tongue-shaped portion and a key concave portion engaging the key convex portion inside the small diameter portion.
The image display device described. 4. The image display device according to claim 1, wherein the eye cap is provided with a cut shape on an inner peripheral surface of the small diameter portion. 5. The image display device according to claim 1, wherein the eye cap is provided with a groove at the base of the tongue. 6. The image display device according to claim 1, further comprising detection means inside the eye cap for detecting that the tongue-shaped portion is pushed into the small diameter portion.