JPH0728382B2 - Integrated video camera - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video integrated camera.

Conventional technology Generally, a video-integrated camera does not have a monitor display, and if you want to play it back immediately after shooting, you have to bring another monitor such as a TV, and you can use it outdoors with a small power source. It was very inconvenient to play with.

A conventional video-integrated camera as shown in FIG. 4 has a viewfinder (cathode ray tube observation system for a captured image monitor).
As an example, a 1-inch cathode ray tube (hereinafter referred to as CRT) 41 is used, and a magnifying optical system 44 using two positive lenses 42 and 43 as an electronic viewfinder optical system at the time of photographing.
Thus, recording was performed while confirming with the eyes 45 (for example, Japanese Patent Application Laid-Open No. 58-182614).

Problems to be Solved by the Invention However, these viewfinders are too small to reproduce and enjoy the images after recording, and
I had to keep my eyes 45 close to the eyepiece, which was inconvenient and could not be seen by more than one person.

The present invention provides a video-integrated camera which eliminates the above problems.

Means for Solving the Problems In order to solve the above problems, the video-integrated camera of the present invention uses a liquid crystal display and a reduction optical system in combination,
A viewfinder section used during shooting is formed, and during reproduction, the reduction optical system is removed and used as a monitor display.

By the above means, it is not necessary to bring a separate monitor such as a TV when playing back immediately after shooting, and it is very convenient when recording / playing outdoors.

Regarding the resolution for which improvement of the liquid crystal display is desired, since the reduction optical system is used, the resolution is apparently increased when used as a viewfinder used for photographing, which is very convenient.

Embodiment An embodiment of the video-integrated camera of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a video integrated camera showing an embodiment of the present invention.

As shown in FIG. 1, the video-integrated camera 100 includes a video main unit 11, a camera unit 12, and a liquid crystal display unit 13.
And a reduction optical unit 14 disposed on the front surface of the liquid crystal display unit 13.

At the time of shooting, the liquid crystal display 13 is combined with a reduction optical system 14 including a lens to form a viewfinder section.

In this case, since the image on the liquid crystal display 13 is reduced by the reduction optical unit 14, the relationship between the viewing angle and the resolution of the eyes
The apparent resolution will be higher than the resolution of the liquid crystal display 13, and the resolution that has been desired to be improved will be improved as compared with the CRT.

Therefore, a clear image can be obtained and the accuracy of focus adjustment is improved, which is very convenient.

As shown in FIG. 2, the reduction optical unit 14 is composed of one positive power lens 21 and one negative power lens 22, and when used as a viewfinder, the liquid crystal display 13 The image is reduced by the reduction optical unit 14
Observed by 23.

On the other hand, at the time of reproduction, as shown in FIG. 3, the reduction optical unit 14 is removed and the liquid crystal display 13 is used as a monitor display, so that many people reproduce it on the spot where the image is taken on a relatively large screen. , It is convenient to be able to see the recorded video.

Next, a specific example will be shown.

A 5-inch liquid crystal display was used as the liquid crystal display unit.

A reduction optical system including a plano-convex lens and a meniscus lens was used for the reduction optical unit arranged on the front surface of the liquid crystal display unit. The values of the shape of each lens are shown below.

Curvature of plano-convex lens R1 = 12mm, R2 = ∞, lens thickness D1 = 3
mm, curvature of the meniscus lens R3 = 16 mm, R4 = 16 mm, lens thickness D3 = 1 mm, distance between two lenses D2 = 10 mm.

With this reduction optical system, a 5 inch liquid crystal display
I was able to reduce it to a 2.5-inch image.

In addition, it is also possible to use a plano-convex lens and a bi-concave lens with the same lens configuration to make an optical system that reduces to 1/3 only by changing the curvature of the lens, the lens thickness, and the lens interval.

The optical system that reduces to 1/3 is the curvature of the plano-convex lens R1 = 12mm, R2
= ∞, lens thickness D1 = 3mm, biconcave lens curvature R3 =-
It can be realized with 1.12mm, R4 = 11.2mm, lens thickness D3 = 1mm, and two lens spacing D2 = 14mm.

Although the liquid crystal display is used as the electronic viewfinder and the display for reproduction in this embodiment, a liquid crystal TV having a channel selection function may be used.

EFFECTS OF THE INVENTION As described above, according to the present invention, by adding a liquid crystal display and a reduction optical system including a lens to a video-integrated camera, a viewfinder with an improved apparent resolution is constructed and a reproduction is performed. In this case, the reduction optical system can be removed and it can be used as a monitor display, which is very convenient when many people gather and record / play back outdoors.

[Brief description of drawings]

FIG. 1 is a perspective view of a video integrated camera which is an embodiment of the present invention, FIG. 2 is a configuration diagram of a liquid crystal display and a reduction optical system, and FIG. 3 is a perspective view of an integrated camera without a reduction optical unit. FIG. 4 is a block diagram of a viewfinder of a conventional video-integrated camera. 11 …… Video main unit, 12 …… Camera unit, 13 …… Liquid crystal display unit, 14 …… Reduction optical unit, 100 …… Video camera, 21 …… Positive power lens, 22 …… Negative power lens , 23 ... Eyes.

Claims (5)

[Claims] 1. A video-integrated camera, comprising: a video main unit, a camera unit, a liquid crystal display unit, and a detachable reduction optical unit disposed on the front surface of the liquid crystal display unit. 2. A reduction optical unit comprising a lens unit having a positive power and a lens unit having a negative power in order from the object side. Integrated video camera. 3. A video system according to claim 1, further comprising a reduction optical unit including one positive power lens and one negative power lens. Body camera. 4. The video-integrated camera according to claim 1, comprising a reduction optical unit including one plano-convex lens and one meniscus lens. 5. The video-integrated camera according to claim 1, further comprising a reduction optical unit including one plano-convex lens and one biconcave lens.