JPH04152767A - Camcorder - Google Patents

Abstract

PURPOSE:To allow the photographer to pick up an object after correcting a tilt by informing it to the user that the camera is tilted when the camera is tilted by an angle or over from the horizontal state. CONSTITUTION:When the camera is in the horizontal state, a magnet 4 is placed between Hall elements H1 and H2, and when the camera is tilted in any of left and right directions from the horizontal state, the magnet 4 is moved in the R or L direction and the displacement of the magnet 4 is detected by the Hall elements H1 and H2. A microcomputer 7 discriminates it that the present state of the camera is in the horizontal state or tilted a little, sends a character signal representing the result of discrimination to a character generator 8 and displayed on a view finder 10 to inform it to the photographer how the horizontal state of the camera is at present.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a VTR-integrated camera, and more particularly to a VTR-integrated camera that prevents the screen from tilting from a horizontal state during photographing.

[Conventional technology]

In general, with conventional VTR-integrated cameras, each time you adjust the camera position, you focus on horizontal or vertical lines in the shooting screen, and adjust the camera position so that these horizontal or vertical lines are parallel to the viewfinder frame. For example, this is recommended in the instruction manual.

Also, when using the camera on a tripod.

I use the level on the camera mount of the tripod to level the camera.

[Problem to be solved by the invention]

The above-mentioned conventional technology has a problem in that when there are no horizontal or vertical lines in the photographic screen, for example, as shown in FIG. 4, it is impossible to determine the degree of inclination of the camera from the horizontal state. What's more, with a viewfinder that has a small screen, you can't tell how tilted it is, and after taking a picture, when you play it back on a large-screen television receiver, the screen may be covered with water or water.
There was a problem in that it was obvious that it was tilted from the child state.

The present invention aims to improve these problems.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a horizontal tilt detection section inside a VTR-integrated camera that detects the degree of tilt of the camera from a horizontal state, and a horizontal tilt detection section that detects the degree of tilt of the camera from a horizontal state. Sometimes, the camera is characterized by being provided with a tilt indicating means for notifying that the camera is tilted. As the tilt instructing means, it is possible to use an audible instructing means such as a buzzer, or means to visually display the direction and degree of inclination with an arrow or the like. In the latter case, an arrow or the like can be displayed in the viewfinder.

[Effect]

According to the above configuration, if the camera is tilted from a horizontal state by more than a certain angle, for example, 2 degrees or more, the user is notified that the camera is tilted, so the photographer can correct the tilt before taking a picture. can.

In particular, when the presence or absence of tilt, the direction of tilt, and the degree of tilt are displayed in the viewfinder using arrows, etc., the situation is immediately notified to the photographer, so the photographer can immediately notice this and correct the tilt. You can then take pictures.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a plan view showing the configuration of a horizontal tilt detecting section for detecting the tilt of the camera from a horizontal state, which is provided inside a VTR-integrated camera, and FIG. 2 is a side view thereof. The rotating arm 3 is attached at one end to a fixing pin 2, and the fixing pin 2 is attached on the printed circuit board 1.

The rotary arm 3 can rotate around the fixed pin 2 as an axis. Further, a magnet 4 is attached to the other end of the rotating arm 3 and functions as a pendulum.

That is, when the camera is in a horizontal state, the magnet 4 is located between Hall elements H1 and R2, and when the camera is tilted from the horizontal state to either the left or right direction, the magnet 4 moves as shown by the arrow. , the position moves in the R direction or the L direction. This amount of movement is proportional to the inclination angle and length of the rotary arm 3. Therefore, when the camera is tilted from a horizontal state, the length of the one-rotation arm 3 must be made sufficiently large in order to accurately detect the tilt in units of 1 to 2 degrees.

The displacement of the magnet 4 with respect to the tilt of the camera from the horizontal state is detected by Hall elements H and R2.

An example of this operation will be explained with reference to FIG.

A Hall element is an element that utilizes the Hall effect (voltage generation effect in a magnetic field) and generates a voltage according to the amount of magnetic flux passing through a magnetic flux convergence chip inside the Hall element. Therefore, when the camera is in a horizontal state, the Hall element H0
and R2 together absorb sufficient magnetic flux and generate a high voltage. This voltage is amplified by differential amplifiers 5a and 5b, the output voltage of differential amplifier IIIM#5a is input to comparator 6a, and the output voltage of differential amplifier 5b is input to comparator 6b.
Enter. Comparators 6a and 6b compare this input voltage with a reference voltage applied through resistors R3 and R4, and when it is higher than the reference voltage, a HIGH signal (hereinafter referred to as
1") is input to the microcomputer 7, and when it is low, a LOW signal (hereinafter represented as '0') is input.
is input into the microcomputer 7. When the camera is in a horizontal state, the outputs of the comparators 6a and 6b are:
Both become 1'1". When the camera is tilted a little from the horizontal state, for example, by 2 degrees, and the rotating arm 3 moves a little in the R direction shown in the figure, the distance between the magnet 4 and the Hall element H becomes shorter, and the magnet 4 and Hall element H2 becomes longer.As a result, the output voltage of Hall element H1 increases and the output voltage of Hall element H2 decreases.At this time, the output of comparator 6a maintains 1#, but The output of the comparator 6b becomes #OII. When the camera tilts further from the horizontal state and the rotating arm 3 moves greatly in the R direction shown in the figure,
Both the distance between the magnet 4 and the Hall element H1 and the distance between the magnet 4 and the Hall element H2 become longer.

As a result, the output voltages of Hall elements H and R2 both decrease, and the outputs of comparators 6a and 6b both become '0'.
When the camera is tilted in the opposite direction to the horizontal state, the rotating arm 3 moves in the L direction shown in the figure, and when the tilt amount is small, for example 2 degrees, the output of the comparator 6a becomes 6. At '0''', the output of comparator 6b is tt
1 pp, and when the amount of slope is large, the outputs of cossiparators 6a and 6b both become at Opp.

The above results are summarized in Table 1.

The microcomputer 7 in Table 1 has comparators 6a and 6b.
Depending on the output state, four situations can be determined.

Therefore, whether the current state of the camera is horizontal,
The microcomputer 7 determines whether the state is slightly tilted or greatly tilted, and according to the determination, a character signal indicating the determination result is sent to the character generator 8 to prepare the character generator 8 in advance. characters that are
By adding O8D signals such as figures or numbers to the video signal and displaying it on the viewfinder 10, it is possible to inform the photographer of the current horizontal state of the camera. In addition, in Table 1, r
Even if the inclination in both R and L directions is large, the previous
Since data such as "Slightly tilted in the R direction" or "Slightly tilted in the L direction" remains, by referring to these signals together, it is possible to identify which direction the tilt is. The history of these tilts can be reset when the shooting of one scene is completed.6See FIG. 5, viewfinder 10 (see FIG. 4).

) shows an example of an alarm display. This alarm display notifies the photographer of the tilt of the camera from the horizontal position. In this example, the slope of the straight line connecting the left end of the horizontal line and the tip of the arrow represents the horizontal state of the screen. It is also possible to display the alarm using characters or numbers instead of arrows. It is also possible to display an alarm using a buzzer or the like.

〔Effect of the invention〕

According to the present invention, it is immediately known by an alarm that the camera is tilted with respect to the horizontal state during camera shooting, so that this can be easily corrected. Unlike before, it is less likely that you will not notice that the camera is tilted and continue shooting.

Furthermore, even when the camera is fixed to a tripod or the like, the level attached to the tripod allows you to know the horizontal state of the tripod, but the tilt of the camera itself is unknown. It is also effective when used as

[Brief explanation of drawings]

FIG. 1 is a plan view showing the configuration of a horizontal tilt detection unit which is an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a circuit block diagram for displaying an alarm on the viewfinder, and FIG. 4 5 is a diagram showing an example of a viewfinder attached to a VTR integrated camera and a photographed scene viewed through the viewfinder, and FIG. 5 is a diagram showing an example of a photographed scene viewed through the viewfinder and a horizontal tilt alarm display. Dobrin board, 2. Fixed pin, 3. Rotating arm,
4. Magnet, 5a, 5b = Differential differential, 6a. 6b...Comparator, 7...Microcomputer, 8...Character generator, 9...Adder, 10...
Viewfinder, H, R2...Hall element, R
1, R,, R3゜R4...Fixed resistor, RTl, RT
2...Semi-constant resistor. 1st country 1st circle H+ (H2) 1st country 1st circle

Claims (1)

[Claims] 1. A horizontal tilt detection section that detects the tilt of the camera from the horizontal state during shooting, and a tilt system that uses the horizontal tilt detection section to notify you of tilt when the tilt exceeds a preset tolerance value. A VTR-integrated camera characterized in that an instruction means is provided in the camera.