JPS60194691A - Rear monitoring device for automobile equipped with display function for image pickup direction - Google Patents

Abstract

PURPOSE:To make the image pickup direction of an image pickup device clear by detecting the image pickup direction by a sensor, and updating a marker indicating the image pickup direction synchronously with a moving video screen. CONSTITUTION:A synchronizing signal is separated by a synchronous separating circuit 3 from a video signal obtained from the image pickup device 1, waveform-shaped, and impressed to an IC9 for character display as a synchronizing signal. The IC9 sends markers 2a and 2b indicating a preset image pickup direction to a video signal line synchronously with said synchronizing signal to form an image on an image receiver 2. Sensors 5 and 6 detect the image pickup direction all the time and video signals of the markers are controlled by a CPU8 according to detection signals to perform transmission. Thus, the display contents of the markers corresponding to the image pickup direction are updated simultaneously according to the movement of the image on the image receiver 2.

Description

Detailed Description of the Invention Technical Field of the Invention The present invention relates to an output of a sensor that detects the orientation of an image pickup device in a rear monitoring device that monitors vehicles, obstacles, etc. and their objects behind an automobile. The present invention relates to a rear monitoring device for a vehicle that has an imaging direction display function that displays a marker indicating the imaging direction on the screen of an image receiver based on a signal.

Conventional technology and its problems Conventionally, this type of rearview monitoring device for automobiles has not been equipped with a function to display the imaging direction, and when the imaging direction of the imager is variably controlled vertically and horizontally, the imaging direction becomes unclear. It had the disadvantage of being

OBJECTS OF THE INVENTION The present invention was invented in view of the drawbacks of tilting. Namely, a sensor is installed to detect the direction of the image pickup device attached to the rear of the vehicle, and the sensor is installed to detect the direction of the image pickup device installed at the rear of the vehicle. Detecting the imaging direction of the variably controlled imager with the sensor,
A mechanism that updates the marker indicating the imaging direction in synchronization with the moving video screen by controlling the imaging direction of the imager,
Therefore, it is an object of the present invention to provide a rear monitoring device for an automobile having an imaging direction display function that makes the imaging direction clear even when the imaging direction of the imager is variably controlled.

Structure of the present invention A preferred embodiment of the present invention will be explained based on FIGS. 1 and 2.

Reference numeral 1 denotes an imager, which is a so-called television camera that is attached to the rear of the automobile and converts the image into an electrical signal in order to capture an image of the rear field of view.

Reference numeral 2 denotes an image receiver, which restores the output signal from the image pickup device 1 into a visible image and displays the rear view on a screen.

3 is a synchronization separation circuit, which is a circuit that separates a synchronization signal from a video signal obtained from the image pickup device 1.

Reference numeral 4 denotes a waveform shaping circuit, in which the horizontal synchronization signal and vertical synchronization signal separated by the synchronization separation circuit 3 are shaped by knot circuits 4a and 4b to form a character display integrated circuit (hereinafter simply referred to as "character display ICJ"). 9).

5 and 6 are first and second sensors. The first and second sensors 5 and 6 are arranged, for example, at a predetermined position of the imager 10, and are configured with variable resistors that are respectively driven by fluctuations in the vertical and horizontal imaging directions,
It converts resistance value changes into potential differences in the vertical and horizontal imaging directions and detects them.

Note that the first and second sensors 5 and 6 are not limited to the configuration using variable resistors, but may be configured using optical elements (not shown) such as photointerrupters to
It is also possible to adopt a configuration in which the vertical, horizontal, and horizontal swing angles are detected. 7 is an analog-to-digital converter (rA-
D converter). 8 is the central processing unit (hereinafter 1'
-CPUJ). The CPU receives digital signals from an A-D converter 7 that converts analog values derived by the first and second sensors 5 and 6 into digital values, and determines the imaging direction of the imager 1 attached to the rear of the vehicle. A signal corresponding to the character display is sent to the character display IC 9.

9 is a character display IC. The character display IC9 is
Receives horizontal and vertical synchronization signals from the video signal obtained from the imager 1 via a synchronization separation circuit 3 and a waveform shaping circuit 4,
A marker display signal indicating the imaging direction instructed by the CPU 8 is sent to the video signal line in synchronization with the horizontal and vertical synchronizing signals. 10 is a diode, and a marker display signal indicating a predetermined imaging direction is sent through the diode 10. Note that 11 is a constant voltage power supply, 12 is an ignition switch, and 16 is a DC power supply.

Function of the present invention A preferred embodiment of the present invention will be explained based on FIGS. 1 and 2. Now, an imager 1 is installed at a predetermined position at the rear of a car so as to be able to capture a predetermined range of the rear view of the car, and an image receiver 2 receives a video signal from the imager 1 and displays an image. In the automobile rearview monitoring device equipped with the following, the horizontal and vertical synchronizing signals are separated from the video signal obtained from the imager 1 by the synchronization separation circuit 3, the horizontal and vertical synchronizing signals are waveform-shaped, and the synchronizing signals are sent to the character display IC9. Apply as. In synchronization with this synchronization signal, the character display IC 9 displays a marker 2a indicating a preset imaging direction.
, 2b are sent to the video signal line based on the control signal instructed by the CPU, and the image is displayed on the receiver 2. Here, a marker 2 indicating the imaging direction sent out by the character display IC 9
The video signals of a and 2b are sent to the first and second sensors 5
, and 6 constantly detect the imaging direction of the imager 1, and in response to the detection signal, the CPU 8 sends out a signal under control. In this way, when the imaging direction of the imager 1 changes, the image on the imager 2 moves up and down and left and right, but the display contents of the markers 2a and 2b corresponding to the imaging direction are also updated accordingly. , has a function of making the imaging direction clear even when the imaging direction of the imager 1 is variable.

Effects of the present invention In a rearview monitoring device for an automobile that displays an image on an image receiver using an imager that captures the rear field of view in a predetermined range at the rear of the automobile, the imaging direction of the imager is detected by first and second sensors; Based on the signal, the CPU displays a marker pattern according to the imaging direction in response to vertical and horizontal fluctuations of the screen, so the imaging direction can be made clear, which is extremely convenient in practice. can be,
It is possible to provide a rearview monitoring device for an automobile that has a highly practical imaging direction display function that enables reliable confirmation of rearward safety.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a screen in which markers corresponding to the imaging direction are displayed on the image receptor along with the rear view. FIG. 2 is an electrical circuit diagram showing an embodiment of a rearward monitoring device for an automobile having an imaging direction display function according to the present invention. 1... Imager, 2... Image receiver, 3... Sync separator,
5... first sensor, 6... second sensor, 7
...A-D converter, 9...Character display IC, 2a,
2b...Marker 0 indicating the imaging direction Fig. 1

Claims (1)

[Claims] In an automobile rearview monitoring device that includes an imager that converts the situation behind the car into an electrical signal and an image receiver that restores the output signal of the imager to a visible image, a predetermined position of the imager is used. A sensor attached to the image receiver detects the orientation of the image pickup device, and a central processing unit receives a signal derived from the sensor and controls a character display integrated circuit to display a marker indicating the imaging direction on the screen of the image receiver. A rearward monitoring device for an automobile equipped with an imaging direction display function, characterized in that: